php-src/configure.ac

dnl Process this file with autoconf to produce a configure script.

dnl Include external macro definitions before the AC_INIT to also remove
dnl comments starting with # and empty newlines from the included files.
dnl ----------------------------------------------------------------------------
m4_include([build/ax_check_compile_flag.m4])
m4_include([build/ax_func_which_gethostbyname_r.m4])
m4_include([build/ax_gcc_func_attribute.m4])
m4_include([build/libtool.m4])
m4_include([build/php_cxx_compile_stdcxx.m4])
m4_include([build/php.m4])
m4_include([build/pkg.m4])
m4_include([TSRM/threads.m4])
m4_include([TSRM/tsrm.m4])

dnl Basic autoconf initialization, generation of config.nice.
dnl ----------------------------------------------------------------------------

AC_PREREQ([2.68])
AC_INIT([PHP],[8.4.0-dev],[https://github.com/php/php-src/issues],[php],[https://www.php.net])
AC_CONFIG_SRCDIR([main/php_version.h])
AC_CONFIG_AUX_DIR([build])
AC_PRESERVE_HELP_ORDER

PHP_CONFIG_NICE(config.nice)

PHP_CANONICAL_HOST_TARGET

AC_CONFIG_HEADERS([main/php_config.h])

AH_TOP([
#ifndef PHP_CONFIG_H
#define PHP_CONFIG_H

#if defined(__GNUC__) && __GNUC__ >= 4
# define ZEND_API __attribute__ ((visibility("default")))
# define ZEND_DLEXPORT __attribute__ ((visibility("default")))
#else
# define ZEND_API
# define ZEND_DLEXPORT
#endif

#define ZEND_DLIMPORT
])
AH_BOTTOM([
#include <stdlib.h>

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#include <string.h>

#endif /* PHP_CONFIG_H */
])

ac_IFS=$IFS; IFS="."
set $(echo AC_PACKAGE_VERSION | "${SED}" 's/\([[0-9\.]]*\)\(.*\)/\1\.\2/')
IFS=$ac_IFS
PHP_MAJOR_VERSION=[$]1
PHP_MINOR_VERSION=[$]2
PHP_RELEASE_VERSION=[$]3
dnl Allow overriding PHP_EXTRA_VERSION through the homonymous env var
AC_ARG_VAR([PHP_EXTRA_VERSION],[Extra PHP version label suffix, e.g. '-dev', 'rc1', '-acme'])dnl
AS_IF([test -z "$PHP_EXTRA_VERSION"],[PHP_EXTRA_VERSION=[$]4])
PHP_VERSION="$PHP_MAJOR_VERSION.$PHP_MINOR_VERSION.$PHP_RELEASE_VERSION$PHP_EXTRA_VERSION"
PHP_VERSION_ID=`expr [$]PHP_MAJOR_VERSION \* 10000 + [$]PHP_MINOR_VERSION \* 100 + [$]PHP_RELEASE_VERSION`

dnl Allow version values to be used in Makefile.
PHP_SUBST(PHP_MAJOR_VERSION)
PHP_SUBST(PHP_MINOR_VERSION)
PHP_SUBST(PHP_RELEASE_VERSION)
PHP_SUBST(PHP_EXTRA_VERSION)

dnl Define where extension directories are located in the configure context.
AC_DEFUN([PHP_EXT_BUILDDIR],[$config_m4_dir])dnl
AC_DEFUN([PHP_EXT_DIR],[$config_m4_dir])dnl
AC_DEFUN([PHP_EXT_SRCDIR],[$abs_srcdir/$config_m4_dir])dnl
AC_DEFUN([PHP_ALWAYS_SHARED],[])dnl

dnl Setting up the PHP version based on the information above.
dnl ----------------------------------------------------------------------------

echo "/* automatically generated by configure */" > php_version.h.new
echo "/* edit configure.ac to change version number */" >> php_version.h.new
echo "#define PHP_MAJOR_VERSION $PHP_MAJOR_VERSION" >> php_version.h.new
echo "#define PHP_MINOR_VERSION $PHP_MINOR_VERSION" >> php_version.h.new
echo "#define PHP_RELEASE_VERSION $PHP_RELEASE_VERSION" >> php_version.h.new
echo "#define PHP_EXTRA_VERSION \"$PHP_EXTRA_VERSION\"" >> php_version.h.new
echo "#define PHP_VERSION \"$PHP_VERSION\"" >> php_version.h.new
echo "#define PHP_VERSION_ID $PHP_VERSION_ID" >> php_version.h.new
cmp php_version.h.new $srcdir/main/php_version.h >/dev/null 2>&1
if test $? -ne 0 ; then
  rm -f $srcdir/main/php_version.h && mv php_version.h.new $srcdir/main/php_version.h && \
  echo 'Updated main/php_version.h'
else
  rm -f php_version.h.new
fi

dnl Settings we want to make before the checks.
dnl ----------------------------------------------------------------------------

php_shtool=$srcdir/build/shtool
T_MD=`$php_shtool echo -n -e %B`
T_ME=`$php_shtool echo -n -e %b`

PHP_INIT_BUILD_SYSTEM

dnl We want this one before the checks, so the checks can modify CFLAGS.
test -z "$CFLAGS" && auto_cflags=1

abs_srcdir=`(cd $srcdir; pwd)`
abs_builddir=`pwd`

dnl Because `make install` is often performed by the superuser, we create the
dnl libs subdirectory as the user who configures PHP. Otherwise, the current
dnl user will not be able to delete libs or the contents of libs.

$php_shtool mkdir -p libs
rm -f libs/*

dnl Checks for programs.
dnl ----------------------------------------------------------------------------

PKG_PROG_PKG_CONFIG
AC_PROG_CC([cc gcc])
PHP_DETECT_ICC
PHP_DETECT_SUNCC

dnl AC_PROG_CC_C99 is obsolete with autoconf >= 2.70 yet necessary for <= 2.69.
m4_version_prereq([2.70],,[AC_PROG_CC_C99])
AC_PROG_CPP
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_LN_S

AS_VAR_IF([cross_compiling], [yes],
  [AC_CHECK_PROGS([BUILD_CC], [gcc clang c99 c89 cc cl], [none])
    AC_MSG_CHECKING([for native build C compiler])
    AC_MSG_RESULT([$BUILD_CC])],
  [BUILD_CC=$CC])

dnl Support systems with system libraries in e.g. /usr/lib64.
PHP_ARG_WITH([libdir],
  [for system library directory],
  [AS_HELP_STRING([--with-libdir=NAME],
    [Look for libraries in .../NAME rather than .../lib])],
  [lib],
  [no])

PHP_ARG_ENABLE([rpath],
  [whether to enable runpaths],
  [AS_HELP_STRING([--disable-rpath],
    [Disable passing additional runtime library search paths])],
  [yes],
  [no])

dnl Check for -R, etc. switch.
PHP_RUNPATH_SWITCH

dnl Checks for some support/generator progs.
PHP_PROG_AWK
PHP_PROG_BISON([3.0.0])
PHP_PROG_RE2C([1.0.3], [--no-generation-date])
PHP_PROG_PHP()

PHP_ARG_ENABLE([re2c-cgoto],
  [whether to enable computed goto extension with re2c],
  [AS_HELP_STRING([--enable-re2c-cgoto],
    [Enable re2c -g flag to optimize conditional jumps using computed goto
    extension, if supported by the compiler])],
  [no],
  [no])

AS_VAR_IF([PHP_RE2C_CGOTO], [no],,
[AC_CACHE_CHECK([whether re2c -g works], [php_cv_have_re2c_cgoto],
  [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
int main(void)
{
label1:
  ;
label2:
  ;
  static void *adr[] = { &&label1, &&label2 };
  goto *adr[0];
  return 0;
}]])],
  [php_cv_have_re2c_cgoto=yes],
  [php_cv_have_re2c_cgoto=no])])
AS_VAR_IF([php_cv_have_re2c_cgoto], [yes],
  [AS_VAR_APPEND([RE2C_FLAGS], [" -g"])])
])

dnl Platform-specific compile settings.
dnl ----------------------------------------------------------------------------

dnl See bug #28605
case $host_cpu in
  alpha*)
    if test "$GCC" = "yes"; then
      CFLAGS="$CFLAGS -mieee"
    else
      CFLAGS="$CFLAGS -ieee"
    fi
    ;;
  sparc*)
    if test "$SUNCC" = "yes"; then
      CFLAGS="$CFLAGS -xmemalign=8s"
    fi
    ;;
esac

dnl See https://github.com/php/php-src/issues/14140
AX_CHECK_COMPILE_FLAG([-ffp-contract=off], [CFLAGS="$CFLAGS -ffp-contract=off"])

dnl Mark symbols hidden by default if the compiler (for example, gcc >= 4)
dnl supports it. This can help reduce the binary size and startup time.
AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],
                       [CFLAGS="$CFLAGS -fvisibility=hidden"])

case $host_alias in
  *solaris*)
    CPPFLAGS="$CPPFLAGS -D_POSIX_PTHREAD_SEMANTICS"
    ;;
  *hpux*)
    if test "$GCC" = "yes"; then
      CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
    fi
    ;;
esac

dnl Disable PIC mode by default where it is known to be safe to do so, to avoid
dnl the performance hit from the lost register.
AC_MSG_CHECKING([whether to force non-PIC code in shared modules])
case $host_alias in
  i?86-*-linux*|i?86-*-freebsd*)
    if test "${with_pic+set}" != "set" || test "$with_pic" = "no"; then
      with_pic=no
      AC_MSG_RESULT(yes)
    else
      AC_MSG_RESULT(no)
    fi
    ;;
  *)
    AC_MSG_RESULT(no)
    ;;
esac

dnl Detect musl libc
AC_MSG_CHECKING([whether we are using musl libc])
if command -v ldd >/dev/null && ldd --version 2>&1 | grep -q ^musl
then
  AC_MSG_RESULT(yes)
  AC_DEFINE([__MUSL__], [1], [Define when using musl libc])
else
  AC_MSG_RESULT(no)
fi

dnl Add _GNU_SOURCE compile definition because the php_config.h with definitions
dnl by AC_USE_SYSTEM_EXTENSIONS might be included after the system headers which
dnl require extensions to C and POSIX.
AS_VAR_APPEND([CPPFLAGS], [" -D_GNU_SOURCE"])

dnl Include Zend configurations.
dnl ----------------------------------------------------------------------------

sinclude(Zend/Zend.m4)

dnl ----------------------------------------------------------------------------

PTHREADS_CHECK
PHP_HELP_SEPARATOR([SAPI modules:])
PHP_SHLIB_SUFFIX_NAMES
PHP_BUILD_PROGRAM
PHP_SAPI=none

dnl SAPI configuration.
dnl ----------------------------------------------------------------------------

dnl Paths to the targets are relative to the build directory.
SAPI_LIBNAME=libphp
SAPI_LIBNAME_SHARED=$SAPI_LIBNAME.[]$SHLIB_DL_SUFFIX_NAME
SAPI_LIBNAME_STATIC=$SAPI_LIBNAME.a
SAPI_SHARED=libs/$SAPI_LIBNAME_SHARED
SAPI_STATIC=libs/$SAPI_LIBNAME_STATIC
SAPI_LIBTOOL=libphp.la

PHP_CONFIGURE_PART(Configuring SAPI modules)

esyscmd(./build/config-stubs sapi)

dnl Show which main SAPI was selected.
AC_MSG_CHECKING([for chosen SAPI module])
AC_MSG_RESULT([$PHP_SAPI])

dnl Show which binaries were selected.
AC_MSG_CHECKING([for executable SAPI binaries])
if test "$PHP_BINARIES"; then
  AC_MSG_RESULT([$PHP_BINARIES])
else
  AC_MSG_RESULT([none])
fi

dnl Exit early.
if test -z "$PHP_INSTALLED_SAPIS"; then
  AC_MSG_ERROR([Nothing to build.])
fi

dnl Force ZTS.
if test "$enable_zts" = "yes"; then
  dnl Add pthreads linker and compiler flags.
  if test -n "$ac_cv_pthreads_lib"; then
    LIBS="$LIBS -l$ac_cv_pthreads_lib"
  fi
  if test -n "$ac_cv_pthreads_cflags"; then
    CFLAGS="$CFLAGS $ac_cv_pthreads_cflags"
  fi

  PTHREADS_FLAGS
fi

dnl Starting system checks.
dnl ----------------------------------------------------------------------------

PHP_CONFIGURE_PART(Running system checks)

dnl Find sendmail binary.
PHP_PROG_SENDMAIL

dnl Check whether the system uses EBCDIC (not ASCII) as its native codeset.
PHP_EBCDIC

dnl Check whether the system byte ordering is bigendian.
PHP_C_BIGENDIAN

dnl Check whether writing to stdout works.
PHP_TEST_WRITE_STDOUT

dnl Check for /usr/pkg/{lib,include} which is where NetBSD puts binary and
dnl source packages. This should be harmless on other OSs.
if test -d /usr/pkg/include && test -d /usr/pkg/lib; then
   CPPFLAGS="$CPPFLAGS -I/usr/pkg/include"
   LDFLAGS="$LDFLAGS -L/usr/pkg/lib"
fi
test -d /usr/ucblib && PHP_ADD_LIBPATH(/usr/ucblib)

dnl First, library checks.
dnl ----------------------------------------------------------------------------

AC_SEARCH_LIBS([socket], [socket network])

AC_CHECK_FUNCS([socketpair],,
  [AC_SEARCH_LIBS([socketpair], [socket network],
    [AC_DEFINE([HAVE_SOCKETPAIR], [1])])])

AC_SEARCH_LIBS([gethostbyaddr], [nsl network])

AC_SEARCH_LIBS([dlopen], [dl],
  [AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if the dl library is available.])])

AC_SEARCH_LIBS([sin], [m])

case $host_alias in
  riscv64*)
    PHP_CHECK_FUNC(__atomic_exchange_1, atomic)
    ;;
esac

dnl Solaris/Illumos for process mapping.
AC_SEARCH_LIBS([Pgrab], [proc])

dnl Haiku does not have network api in libc.
AC_SEARCH_LIBS([setsockopt], [network])

dnl Then headers.
dnl ----------------------------------------------------------------------------

dnl QNX requires unix.h to allow functions in libunix to work properly.
AC_CHECK_HEADERS([ \
dirent.h \
sys/param.h \
sys/types.h \
sys/time.h \
netinet/in.h \
alloca.h \
arpa/inet.h \
arpa/nameser.h \
dns.h \
fcntl.h \
grp.h \
ieeefp.h \
langinfo.h \
linux/sock_diag.h \
poll.h \
pty.h \
pwd.h \
resolv.h \
strings.h \
syslog.h \
sysexits.h \
sys/ioctl.h \
sys/file.h \
sys/mman.h \
sys/mount.h \
sys/poll.h \
sys/resource.h \
sys/select.h \
sys/socket.h \
sys/stat.h \
sys/statfs.h \
sys/statvfs.h \
sys/vfs.h \
sys/sysexits.h \
sys/uio.h \
sys/wait.h \
sys/loadavg.h \
unistd.h \
unix.h \
utime.h \
sys/utsname.h \
sys/ipc.h \
dlfcn.h \
tmmintrin.h \
nmmintrin.h \
wmmintrin.h \
immintrin.h
],[],[],[
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
])

PHP_FOPENCOOKIE
PHP_BROKEN_GETCWD
if test "$GCC" = "yes"; then
  PHP_BROKEN_GCC_STRLEN_OPT
fi

dnl Detect the headers required to use makedev, major, and minor.
dnl Autoconf <= 2.69 didn't check glibc 2.25 deprecated macros in sys/types.h.
m4_version_prereq([2.70],,[ac_cv_header_sys_types_h_makedev=no])
AC_HEADER_MAJOR

dnl Checks for typedefs, structures, and compiler characteristics.
dnl ----------------------------------------------------------------------------

AC_STRUCT_TIMEZONE

PHP_MISSING_TIME_R_DECL

AC_CHECK_TYPES([struct flock],,,[#include <fcntl.h>])
AC_CHECK_TYPES(socklen_t, [], [], [
  #ifdef HAVE_SYS_TYPES_H
  # include <sys/types.h>
  #endif
  #ifdef HAVE_SYS_SOCKET_H
  # include <sys/socket.h>
  #endif
])

dnl These are defined elsewhere than stdio.h.
PHP_CHECK_SIZEOF(intmax_t, 0)
PHP_CHECK_SIZEOF(ssize_t, 8)
PHP_CHECK_SIZEOF(ptrdiff_t, 8)

dnl Check stdint types (must be after header check).
PHP_CHECK_STDINT_TYPES

dnl Check __builtin_expect
PHP_CHECK_BUILTIN_EXPECT
dnl Check __builtin_unreachable
PHP_CHECK_BUILTIN_UNREACHABLE
dnl Check __builtin_clz
PHP_CHECK_BUILTIN_CLZ
dnl Check __builtin_clzl
PHP_CHECK_BUILTIN_CLZL
dnl Check __builtin_clzll
PHP_CHECK_BUILTIN_CLZLL
dnl Check __builtin_ctzl
PHP_CHECK_BUILTIN_CTZL
dnl Check __builtin_ctzll
PHP_CHECK_BUILTIN_CTZLL
dnl Check __builtin_smull_overflow
PHP_CHECK_BUILTIN_SMULL_OVERFLOW
dnl Check __builtin_smulll_overflow
PHP_CHECK_BUILTIN_SMULLL_OVERFLOW
dnl Check __builtin_saddl_overflow
PHP_CHECK_BUILTIN_SADDL_OVERFLOW
dnl Check __builtin_saddll_overflow
PHP_CHECK_BUILTIN_SADDLL_OVERFLOW
dnl Check __builtin_usub_overflow
PHP_CHECK_BUILTIN_USUB_OVERFLOW
dnl Check __builtin_ssubl_overflow
PHP_CHECK_BUILTIN_SSUBL_OVERFLOW
dnl Check __builtin_ssubll_overflow
PHP_CHECK_BUILTIN_SSUBLL_OVERFLOW
dnl Check __builtin_cpu_init
PHP_CHECK_BUILTIN_CPU_INIT
dnl Check __builtin_cpu_supports
PHP_CHECK_BUILTIN_CPU_SUPPORTS
dnl Check __builtin_frame_address
PHP_CHECK_BUILTIN_FRAME_ADDRESS
dnl Check AVX512
PHP_CHECK_AVX512_SUPPORTS
dnl Check AVX512 VBMI
PHP_CHECK_AVX512_VBMI_SUPPORTS

dnl Check for __alignof__ support in the compiler
AC_CACHE_CHECK(whether the compiler supports __alignof__, ac_cv_alignof_exists,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]],[[
  int align = __alignof__(int);
  (void)align;
]])],[
  ac_cv_alignof_exists=yes
],[
  ac_cv_alignof_exists=no
])])
if test "$ac_cv_alignof_exists" = "yes"; then
  AC_DEFINE([HAVE_ALIGNOF], 1, [whether the compiler supports __alignof__])
fi

dnl Check for structure members.
AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,[#include <time.h>])
AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_rdev])
dnl AC_STRUCT_ST_BLOCKS will screw QNX because fileblocks.o does not exist.
if test "`uname -s 2>/dev/null`" != "QNX"; then
  AC_STRUCT_ST_BLOCKS
fi

dnl Checks for types.
AC_TYPE_UID_T

dnl Checks for sockaddr_storage and sockaddr.sa_len.
AC_CHECK_TYPES([struct sockaddr_storage],,,[#include <sys/socket.h>])
AC_CHECK_MEMBERS([struct sockaddr.sa_len],,,[#include <sys/socket.h>])

dnl Checks for GCC function attributes on all systems except ones without glibc
dnl Fix for these systems is already included in GCC 7, but not on GCC 6.
dnl
dnl At least some versions of FreeBSD seem to have buggy ifunc support, see
dnl bug #77284. Conservatively don't use ifuncs on FreeBSD prior to version 12.
AS_CASE([$host_alias], [*-*-*android*|*-*-*uclibc*|*-*-*musl*|*openbsd*], [true], [
  if test "`uname -s 2>/dev/null`" != "FreeBSD" || test "`uname -U 2>/dev/null`" -ge 1200000; then
    AX_GCC_FUNC_ATTRIBUTE([ifunc])
    AX_GCC_FUNC_ATTRIBUTE([target])
  fi
])

dnl Check for __attribute__ ((__aligned__)) support in the compiler.
PHP_CHECK_VARIABLE_ATTRIBUTE([aligned])

dnl Check for IPv6 support.
AC_CACHE_CHECK([for IPv6 support], ac_cv_ipv6_support,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>]], [[
  struct sockaddr_in6 s;
  struct in6_addr t = in6addr_any;
  int i = AF_INET6;
  (void)s;
  t.s6_addr[0] = 0;
  (void)i;
]])],
  [ac_cv_ipv6_support=yes], [ac_cv_ipv6_support=no])])

dnl Checks for library functions.
dnl ----------------------------------------------------------------------------

AC_CHECK_FUNCS(m4_normalize([
  alphasort
  asctime_r
  asprintf
  chroot
  ctime_r
  explicit_memset
  fdatasync
  flock
  ftok
  funopen
  gai_strerror
  getcwd
  getgrnam_r
  gethostname
  getloadavg
  getlogin
  getprotobyname
  getprotobynumber
  getpwnam_r
  getpwuid_r
  getrusage
  getservbyname
  getservbyport
  gettimeofday
  getwd
  glob
  gmtime_r
  lchown
  localtime_r
  memcntl
  memfd_create
  memmem
  mempcpy
  memrchr
  mkstemp
  mmap
  nice
  nl_langinfo
  poll
  pthread_jit_write_protect_np
  putenv
  scandir
  setenv
  setitimer
  shutdown
  sigprocmask
  statfs
  statvfs
  std_syslog
  strcasecmp
  strnlen
  strptime
  strtok_r
  symlink
  tzset
  unsetenv
  usleep
  utime
  vasprintf
]))

AC_CHECK_FUNC([inet_ntop],,[AC_MSG_ERROR([Required inet_ntop not found.])])
AC_CHECK_FUNC([inet_pton],,[AC_MSG_ERROR([Required inet_pton not found.])])

dnl Check for strerror_r, and if its a POSIX-compatible or a GNU specific version.
AC_FUNC_STRERROR_R

dnl Check for functions inside their belonging headers.
AC_CHECK_HEADER([sys/prctl.h], [AC_CHECK_FUNCS([prctl])])
AC_CHECK_HEADER([sys/procctl.h], [AC_CHECK_FUNCS([procctl])])

AX_FUNC_WHICH_GETHOSTBYNAME_R

dnl Some systems (Solaris 10) do not have nanosleep in libc.
AC_CHECK_FUNCS([nanosleep],,
  [AC_SEARCH_LIBS([nanosleep], [rt], [AC_DEFINE([HAVE_NANOSLEEP], [1])])])

dnl Check for getaddrinfo, should be a better way, but... Also check for working
dnl getaddrinfo.
AC_CACHE_CHECK([for getaddrinfo], ac_cv_func_getaddrinfo,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netdb.h>]],
  [[struct addrinfo *g,h;g=&h;getaddrinfo("","",g,&g);]])],[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <netdb.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#ifndef AF_INET
# include <sys/socket.h>
#endif
int main(void) {
  struct addrinfo *ai, *pai, hints;

  memset(&hints, 0, sizeof(hints));
  hints.ai_flags = AI_NUMERICHOST;

  if (getaddrinfo("127.0.0.1", 0, &hints, &ai) < 0) {
    return 1;
  }

  if (ai == 0) {
    return 1;
  }

  pai = ai;

  while (pai) {
    if (pai->ai_family != AF_INET) {
      /* 127.0.0.1/NUMERICHOST should only resolve ONE way */
      return 1;
    }
    if (pai->ai_addr->sa_family != AF_INET) {
      /* 127.0.0.1/NUMERICHOST should only resolve ONE way */
      return 1;
    }
    pai = pai->ai_next;
  }
  freeaddrinfo(ai);
  return 0;
}
  ]])],[ac_cv_func_getaddrinfo=yes], [ac_cv_func_getaddrinfo=no], [
    dnl Cross compilation.
    case $host_alias in
      *linux*|*midipix)
        ac_cv_func_getaddrinfo=yes
        ;;
      *)
        ac_cv_func_getaddrinfo=no
        ;;
    esac
  ])],
[ac_cv_func_getaddrinfo=no])])
if test "$ac_cv_func_getaddrinfo" = yes; then
  AC_DEFINE(HAVE_GETADDRINFO,1,[Define if you have the getaddrinfo function])
fi

dnl on FreeBSD, copy_file_range() works only with the undocumented flag 0x01000000;
dnl until the problem is fixed properly, copy_file_range() is used only on Linux
AC_CACHE_CHECK([for copy_file_range], ac_cv_copy_file_range,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#ifdef __linux__
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <linux/version.h>
#include <unistd.h>

int main(void) {
(void)copy_file_range(-1, 0, -1, 0, 0, 0);
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,3,0)
#error "kernel too old"
#else
return 0;
#endif
}
#else
#error "unsupported platform"
#endif
]])], [ac_cv_copy_file_range=yes], [ac_cv_copy_file_range=no], [ac_cv_copy_file_range=no])
])

if test "$ac_cv_copy_file_range" = yes; then
  AC_DEFINE(HAVE_COPY_FILE_RANGE,1,[Define if copy_file_range support])
fi

AC_REPLACE_FUNCS(strlcat strlcpy explicit_bzero getopt)
AC_FUNC_ALLOCA
PHP_TIME_R_TYPE

AC_CACHE_CHECK([for aarch64 CRC32 API], ac_cv_func___crc32d,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <arm_acle.h>]],[[__crc32d(0, 0);]])],[ac_cv_func___crc32d=yes],[ac_cv_func___crc32d="no"])])
if test "$ac_cv_func___crc32d" = "yes"; then
  AC_DEFINE([HAVE_AARCH64_CRC32], [1], [Define when aarch64 CRC32 API is available.])
fi

dnl Check for asm goto support.
AC_CACHE_CHECK([for asm goto], [ac_cv__asm_goto],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[
#if defined(__x86_64__) || defined(__i386__)
    __asm__ goto("jmp %l0\n" :::: end);
#elif defined(__aarch64__)
    __asm__ goto("b %l0\n" :::: end);
#endif
end:
    return 0;
]])], [ac_cv__asm_goto=yes], [ac_cv__asm_goto=no])])
if test "$ac_cv__asm_goto" = yes; then
  AC_DEFINE([HAVE_ASM_GOTO], [1], [Define if asm goto support is available.])
fi

dnl Check valgrind support.
PHP_ARG_WITH([valgrind],
  [whether to enable valgrind support],
  [AS_HELP_STRING([--with-valgrind],
    [Enable valgrind support])],
  [no],
  [no])

if test "$PHP_VALGRIND" != "no"; then
  PKG_CHECK_MODULES([VALGRIND], [valgrind], [have_valgrind="yes"], [have_valgrind="no"])

  if test "$have_valgrind" = "yes"; then
    PHP_EVAL_INCLINE($VALGRIND_CFLAGS)
    AC_DEFINE(HAVE_VALGRIND, 1, [ ])
  else
    if test "$with_valgrind" = "yes"; then
      AC_MSG_ERROR([Valgrind not found. Please install Valgrind.])
    fi
  fi
fi

dnl Check for openpty. It may require linking against libutil or libbsd.
AC_CHECK_FUNCS([openpty],,
  [AC_SEARCH_LIBS([openpty], [util bsd], [AC_DEFINE([HAVE_OPENPTY], [1])])])

dnl General settings.
dnl ----------------------------------------------------------------------------
PHP_CONFIGURE_PART(General settings)

PHP_HELP_SEPARATOR([General settings:])

PHP_ARG_ENABLE([gcov],
  [whether to include gcov symbols],
  [AS_HELP_STRING([--enable-gcov],
    [Enable GCOV code coverage - FOR DEVELOPERS ONLY!!])],
  [no],
  [no])

if test "$PHP_GCOV" = "yes"; then

  if test "$GCC" != "yes"; then
    AC_MSG_ERROR([GCC is required for --enable-gcov])
  fi

  dnl Check if ccache is being used.
  case `$php_shtool path $CC` in
    *ccache*[)] gcc_ccache=yes;;
    *[)] gcc_ccache=no;;
  esac

  if test "$gcc_ccache" = "yes" && (test -z "$CCACHE_DISABLE" || test "$CCACHE_DISABLE" != "1"); then
    AC_MSG_ERROR([ccache must be disabled when --enable-gcov option is used. You can disable ccache by setting environment variable CCACHE_DISABLE=1.])
  fi

  AC_DEFINE(HAVE_GCOV, 1, [Whether you have gcov])
  PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/build/Makefile.gcov, $abs_srcdir)

  dnl Remove all optimization flags from CFLAGS.
  changequote({,})
  dnl Discard known '-O...' flags, including just '-O', but do not remove only '-O' in '-Ounknown'
  CFLAGS=`echo "$CFLAGS" | $SED -e 's/-O\([0-9gsz]\|fast\|\)\([\t ]\|$\)//g'`
  CXXFLAGS=`echo "$CXXFLAGS" | $SED -e 's/-O\([0-9gsz]\|fast\|\)\([\t ]\|$\)//g'`
  changequote([,])

  dnl Add the special gcc flags.
  CFLAGS="$CFLAGS -O0 -fprofile-arcs -ftest-coverage"
  CXXFLAGS="$CXXFLAGS -O0 -fprofile-arcs -ftest-coverage"
fi

PHP_ARG_ENABLE([debug],
  [whether to include debugging symbols],
  [AS_HELP_STRING([--enable-debug],
    [Compile with debugging symbols])],
  [no],
  [no])

if test "$PHP_DEBUG" = "yes"; then
  PHP_DEBUG=1
  ZEND_DEBUG=yes
  changequote({,})
  dnl Discard known '-O...' flags, including just '-O', but do not remove only '-O' in '-Ounknown'
  CFLAGS=`echo "$CFLAGS" | $SED -e 's/-O\([0-9gsz]\|fast\|\)\([\t ]\|$\)//g'`
  CXXFLAGS=`echo "$CXXFLAGS" | $SED -e 's/-O\([0-9gsz]\|fast\|\)\([\t ]\|$\)//g'`
  changequote([,])
  dnl Add -O0 only if GCC or ICC is used.
  if test "$GCC" = "yes" || test "$ICC" = "yes"; then
    CFLAGS="$CFLAGS -O0"
    CXXFLAGS="$CXXFLAGS -g -O0"
  fi
  if test "$SUNCC" = "yes"; then
    if test -n "$auto_cflags"; then
      CFLAGS="-g"
      CXXFLAGS="-g"
    else
      CFLAGS="$CFLAGS -g"
      CXXFLAGS="$CFLAGS -g"
    fi
  fi
else
  PHP_DEBUG=0
  ZEND_DEBUG=no
fi

PHP_ARG_ENABLE([debug-assertions],
  [whether to enable debug assertions in release mode],
  [AS_HELP_STRING([--enable-debug-assertions],
    [Compile with debug assertions even in release mode])],
  [no],
  [no])

if test "$PHP_DEBUG_ASSERTIONS" = "yes"; then
  PHP_DEBUG=1
  ZEND_DEBUG=yes
fi

AC_ARG_ENABLE([zts],
  [AS_HELP_STRING([--enable-zts],
    [Enable thread safety])],
  [ZEND_ZTS=$enableval],
  [ZEND_ZTS=no])

if test "$ZEND_ZTS" = "yes"; then
  AC_DEFINE(ZTS, 1,[ ])
  PHP_THREAD_SAFETY=yes
else
  PHP_THREAD_SAFETY=no
fi

PHP_ARG_ENABLE([rtld-now],
  [whether to dlopen extensions with RTLD_NOW instead of RTLD_LAZY],
  [AS_HELP_STRING([--enable-rtld-now],
    [Use dlopen with RTLD_NOW instead of RTLD_LAZY])],
  [no],
  [no])

if test "$PHP_RTLD_NOW" = "yes"; then
  AC_DEFINE(PHP_USE_RTLD_NOW, 1, [ Use dlopen with RTLD_NOW instead of RTLD_LAZY ])
fi

PHP_ARG_WITH([layout],
  [layout of installed files],
  [AS_HELP_STRING([--with-layout=TYPE],
    [Set how installed files will be laid out. Type can be either PHP or GNU [PHP]])],
  [PHP],
  [no])

case $PHP_LAYOUT in
  GNU)
    oldstyleextdir=no
    ;;
  *)
    oldstyleextdir=yes
    ;;
esac

PHP_ARG_WITH([config-file-path],
  [path to configuration file],
  [AS_HELP_STRING([--with-config-file-path=PATH],
    [Set the path in which to look for php.ini [PREFIX/lib]])],
  [DEFAULT],
  [no])

if test "$PHP_CONFIG_FILE_PATH" = "DEFAULT"; then
  case $PHP_LAYOUT in
    GNU)
      PHP_CONFIG_FILE_PATH=$sysconfdir
      ;;
    *)
      PHP_CONFIG_FILE_PATH=$libdir
      ;;
  esac
fi

AC_MSG_CHECKING([where to scan for configuration files])
PHP_ARG_WITH([config-file-scan-dir],,
  [AS_HELP_STRING([--with-config-file-scan-dir=PATH],
    [Set the path where to scan for configuration files])],
  [DEFAULT],
  [no])

if test "$PHP_CONFIG_FILE_SCAN_DIR" = "DEFAULT"; then
  PHP_CONFIG_FILE_SCAN_DIR=
fi
AC_MSG_RESULT([$PHP_CONFIG_FILE_SCAN_DIR])

test -n "$DEBUG_CFLAGS" && CFLAGS="$CFLAGS $DEBUG_CFLAGS"

PHP_ARG_ENABLE([sigchild],
  [whether to enable PHP's own SIGCHLD handler],
  [AS_HELP_STRING([--enable-sigchild],
    [Enable PHP's own SIGCHLD handler])],
  [no],
  [no])

if test "$PHP_SIGCHILD" = "yes"; then
  AC_DEFINE(PHP_SIGCHILD, 1, [ ])
else
  AC_DEFINE(PHP_SIGCHILD, 0, [ ])
fi

PHP_ARG_ENABLE([libgcc],
  [whether to explicitly link against libgcc],
  [AS_HELP_STRING([--enable-libgcc],
    [Enable explicitly linking against libgcc])],
  [no],
  [no])

if test "$PHP_LIBGCC" = "yes"; then
  PHP_LIBGCC_LIBPATH(gcc)
  if test -z "$libgcc_libpath"; then
    AC_MSG_ERROR([Cannot locate libgcc. Make sure that gcc is in your path])
  fi
  PHP_ADD_LIBPATH($libgcc_libpath)
  PHP_ADD_LIBRARY(gcc, yes)
fi

PHP_ARG_ENABLE([short-tags],
  [whether to enable short tags by default],
  [AS_HELP_STRING([--disable-short-tags],
    [Disable the short-form <? start tag by default])],
  [yes],
  [no])

if test "$PHP_SHORT_TAGS" = "yes"; then
  AC_DEFINE(DEFAULT_SHORT_OPEN_TAG, "1", [ ])
else
  AC_DEFINE(DEFAULT_SHORT_OPEN_TAG, "0", [ ])
fi

PHP_ARG_ENABLE([dmalloc],
  [whether to enable dmalloc],
  [AS_HELP_STRING([--enable-dmalloc],
    [Enable dmalloc])],
  [no],
  [no])

if test "$PHP_DMALLOC" = "yes"; then
  AC_CHECK_LIB(dmalloc, dmalloc_error, [
    PHP_ADD_LIBRARY(dmalloc)
    AC_DEFINE(HAVE_DMALLOC,1,[Whether you have dmalloc])
    CPPFLAGS="$CPPFLAGS -DDMALLOC_FUNC_CHECK"
  ], [
    AC_MSG_ERROR([Problem with enabling dmalloc. Please check config.log for details.])
  ])
fi

PHP_ARG_ENABLE([ipv6],
  [whether to enable IPv6 support],
  [AS_HELP_STRING([--disable-ipv6],
    [Disable IPv6 support])],
  [yes],
  [no])

if test "$PHP_IPV6" != "no" && test "$ac_cv_ipv6_support" = yes; then
  AC_DEFINE(HAVE_IPV6, 1, [Whether to enable IPv6 support])
fi

dnl DTRACE checks. Note: this has to be done after SAPI configuration.
PHP_ARG_ENABLE([dtrace],
  [whether to enable DTrace support],
  [AS_HELP_STRING([--enable-dtrace],
    [Enable DTrace support])],
  [no],
  [no])

if test "$PHP_DTRACE" = "yes"; then
  AC_CHECK_HEADER([sys/sdt.h], [
    PHP_INIT_DTRACE([Zend/zend_dtrace.d],[Zend/zend_dtrace_gen.h],[main/main.c Zend/zend_API.c \
      Zend/zend_execute.c Zend/zend_exceptions.c \
      Zend/zend_dtrace.c Zend/zend.c])
    AC_DEFINE(HAVE_DTRACE, 1, [Whether to enable DTrace support])
    PHP_SUBST(PHP_DTRACE_OBJS)
  ], [
    AC_MSG_ERROR([Cannot find sys/sdt.h which is required for DTrace support])
  ])
fi

AC_MSG_CHECKING([how big to make fd sets])
PHP_ARG_ENABLE([fd-setsize],,
  [AS_HELP_STRING([--enable-fd-setsize],
    [Set size of descriptor sets])],
  [no],
  [no])

if test "$PHP_FD_SETSIZE" != "no"; then
  if test "0$PHP_FD_SETSIZE" -gt 0 2>/dev/null; then
    CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=$PHP_FD_SETSIZE"
    AC_MSG_RESULT([using $PHP_FD_SETSIZE])
  else
    AC_MSG_ERROR([Invalid value passed to --enable-fd-setsize!])
  fi
else
  AC_MSG_RESULT([using system default])
fi

PHP_ARG_ENABLE([werror],,
  [AS_HELP_STRING([--enable-werror],
    [Enable -Werror])],
  [no],
  [no])
PHP_ARG_ENABLE([memory-sanitizer],,
  [AS_HELP_STRING([--enable-memory-sanitizer],
    [Enable memory sanitizer (clang only)])],
  [no],
  [no])
PHP_ARG_ENABLE([address-sanitizer],,
  [AS_HELP_STRING([--enable-address-sanitizer],
    [Enable address sanitizer])],
  [no],
  [no])
PHP_ARG_ENABLE([undefined-sanitizer],,
  [AS_HELP_STRING([--enable-undefined-sanitizer],
    [Enable undefined sanitizer])],
  [no],
  [no])

dnl Extension configuration.
dnl ----------------------------------------------------------------------------

PHP_HELP_SEPARATOR([Extensions:

  --with-EXTENSION=[shared[,PATH]]

    NOTE: Not all extensions can be built as 'shared'.

    Example: --with-foobar=shared,/usr/local/foobar/

      o Builds the foobar extension as shared extension.
      o foobar package install prefix is /usr/local/foobar/
])

PHP_CONFIGURE_PART(Configuring extensions)

dnl Check if all enabled by default extensions should be disabled.
AC_ARG_ENABLE([all],
  [AS_HELP_STRING([--disable-all],
    [Disable all extensions which are enabled by default])],
  [PHP_ENABLE_ALL=$enableval])

dnl Reading config stubs.
esyscmd(./build/config-stubs ext)

dnl Extensions post-config.
dnl ----------------------------------------------------------------------------

dnl Align segments on huge page boundary
AS_CASE([$host_alias], [[i[3456]86-*-linux-* | x86_64-*-linux-*]],
  [AC_CACHE_CHECK([linker support for -zcommon-page-size=2097152],
    [php_cv_have_common_page_size], [
    save_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-zcommon-page-size=2097152 -Wl,-zmax-page-size=2097152"
    AC_RUN_IFELSE([AC_LANG_PROGRAM()],
      [php_cv_have_common_page_size=yes],
      [php_cv_have_common_page_size=no],
      [php_cv_have_common_page_size=no])
    LDFLAGS=$save_LDFLAGS])
  AS_VAR_IF([php_cv_have_common_page_size], [yes],
    [EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM -Wl,-zcommon-page-size=2097152 -Wl,-zmax-page-size=2097152"],
    [AC_CACHE_CHECK([linker support for -zmax-page-size=2097152],
      [php_cv_have_max_page_size], [
      save_LDFLAGS=$LDFLAGS
      LDFLAGS="$LDFLAGS -Wl,-zmax-page-size=2097152"
      AC_RUN_IFELSE([AC_LANG_PROGRAM()],
        [php_cv_have_max_page_size=yes],
        [php_cv_have_max_page_size=no],
        [php_cv_have_max_page_size=no])
      LDFLAGS=$save_LDFLAGS])
    AS_VAR_IF([php_cv_have_max_page_size], [yes],
      [EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM -Wl,-zmax-page-size=2097152"])
  ])
])

enable_shared=yes
enable_static=yes

case $php_sapi_module in
  shared[)]
    if test "$PHP_CGI" = "no" && test "$PHP_CLI" = "no" && test "$PHP_FPM" = "no" && test "$PHP_LITESPEED" = "no" && test "$PHP_PHPDBG" = "no"; then
      enable_static=no
    fi
    case $with_pic in
      yes)
        standard_libtool_flag='-prefer-pic'
        ;;
      no)
        standard_libtool_flag='-prefer-non-pic'
        ;;
    esac
    EXTRA_LDFLAGS="$EXTRA_LDFLAGS -avoid-version -module"
    ;;
  *[)]
    standard_libtool_flag='-prefer-non-pic -static'
    if test -z "$PHP_MODULES" && test -z "$PHP_ZEND_EX"; then
      enable_shared=no
    fi
    ;;
esac

EXTRA_LIBS="$EXTRA_LIBS $DLIBS $LIBS"

dnl This has to be here to prevent the openssl crypt() from overriding the
dnl system provided crypt().
if test "$ac_cv_lib_crypt_crypt" = "yes"; then
  EXTRA_LIBS="-lcrypt $EXTRA_LIBS -lcrypt"
fi

unset LIBS

dnl PEAR
dnl ----------------------------------------------------------------------------

PHP_HELP_SEPARATOR([PEAR:])
PHP_CONFIGURE_PART(Configuring PEAR)

dnl If CLI is disabled disable PEAR.
if test "$PHP_CLI" = "no"; then
  with_pear=no
fi

PHP_ARG_WITH([pear],
  [whether to install PEAR],
  [AS_HELP_STRING([[--with-pear[=DIR]]],
    [Install PEAR in DIR [PREFIX/lib/php]])],
  [no],
  [yes])

if test "$PHP_PEAR" != "no"; then

  dnl PEAR dependencies.
  if test "$PHP_XML" = "no"; then
    pear_error_msg="$pear_error_msg
                    PEAR requires XML to be enabled.     Add --enable-xml to the configure line. (or --without-pear)"
  fi

  if test "$pear_error_msg"; then
    AC_MSG_ERROR([$pear_error_msg])
  fi

  AC_MSG_WARN([The --with-pear option is deprecated])

  install_pear="install-pear"
  PEAR_INSTALLDIR=$PHP_PEAR

  if test "$PHP_PEAR" = "yes"; then
    case $PHP_LAYOUT in
      GNU) PEAR_INSTALLDIR=$datadir/pear;;
      *)   PEAR_INSTALLDIR=$libdir/php;;
    esac
  fi

  PHP_SUBST([PEAR_INSTALLDIR])
  PHP_ADD_BUILD_DIR([pear])
  PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/pear/Makefile.frag,$abs_srcdir/pear,pear)
fi

dnl Configuring Zend and TSRM.
dnl ----------------------------------------------------------------------------

PHP_HELP_SEPARATOR([Zend:])
PHP_CONFIGURE_PART(Configuring Zend)

AC_ARG_ENABLE([fiber-asm],
  [AS_HELP_STRING([--disable-fiber-asm],
    [Disable the use of boost fiber assembly files])],
  [fiber_asm=$enableval], [fiber_asm='yes'])

AS_CASE([$host_cpu],
  [x86_64*|amd64*], [fiber_cpu="x86_64"],
  [x86*|amd*|i?86*|pentium], [fiber_cpu="i386"],
  [aarch64*|arm64*], [fiber_cpu="arm64"],
  [arm*], [fiber_cpu="arm32"],
  [ppc64*|powerpc64*], [fiber_cpu="ppc64"],
  [ppc*|powerpc*], [fiber_cpu="ppc32"],
  [riscv64*], [fiber_cpu="riscv64"],
  [sparc64], [fiber_cpu="sparc64"],
  [s390x*], [fiber_cpu="s390x"],
  [loongarch64*], [fiber_cpu="loongarch64"],
  [mips64*], [fiber_cpu="mips64"],
  [mips*], [fiber_cpu="mips32"],
  [fiber_cpu="unknown"]
)

AS_CASE([$host_os],
  [darwin*], [fiber_os="mac"],
  [aix*|os400*], [fiber_os="aix"],
  [freebsd*], [fiber_os="freebsd"],
  [midipix], [fiber_os="midipix"],
  [fiber_os="other"]
)

AS_CASE([$fiber_cpu],
  [x86_64], [fiber_asm_file_prefix="x86_64_sysv"],
  [i386], [fiber_asm_file_prefix="i386_sysv"],
  [arm64], [fiber_asm_file_prefix="arm64_aapcs"],
  [arm32], [fiber_asm_file_prefix="arm_aapcs"],
  [ppc64], [fiber_asm_file_prefix="ppc64_sysv"],
  [ppc32], [fiber_asm_file_prefix="ppc32_sysv"],
  [riscv64], [fiber_asm_file_prefix="riscv64_sysv"],
  [sparc64], [fiber_asm_file_prefix="sparc64_sysv"],
  [s390x], [fiber_asm_file_prefix="s390x_sysv"],
  [loongarch64], [fiber_asm_file_prefix="loongarch64_sysv"],
  [mips64], [fiber_asm_file_prefix="mips64_n64"],
  [mips32], [fiber_asm_file_prefix="mips32_o32"],
  [fiber_asm_file_prefix="unknown"]
)

if test "$fiber_os" = 'mac'; then
  fiber_asm_file="combined_sysv_macho_gas"
elif test "$fiber_os" = 'aix'; then
  # AIX uses a different calling convention (shared with non-_CALL_ELF Linux).
  # The AIX assembler isn't GNU, but the file is compatible.
  fiber_asm_file="${fiber_asm_file_prefix}_xcoff_gas"
elif test "$fiber_os" = 'freebsd'; then
  case $fiber_cpu in
    i386*)
      fiber_asm="no"
      ;;
    *)
      fiber_asm_file="${fiber_asm_file_prefix}_elf_gas"
      ;;
  esac
elif test "$fiber_os" = 'midipix'; then
  case $fiber_cpu in
    i386*)
      fiber_asm="no"
      ;;
    x86_64)
      fiber_asm_file="x86_64_ms_pe_gas"
      ;;
  esac
elif test "$fiber_asm_file_prefix" != 'unknown'; then
  fiber_asm_file="${fiber_asm_file_prefix}_elf_gas"
else
  fiber_asm="no"
fi

AC_CACHE_CHECK([whether syscall to create shadow stack exists],
[php_cv_have_shadow_stack_syscall],
[AC_RUN_IFELSE([AC_LANG_SOURCE([
#include <unistd.h>
#include <sys/mman.h>
int main(void) {
  /* test if syscall 451, i.e., map_shadow_stack is available */
  void* base = (void *)syscall(451, 0, 0x20000, 0x1);
  if (base != (void*)-1) {
    munmap(base, 0x20000);
    return 0;
  }
  return 1;
}
])],
  [php_cv_have_shadow_stack_syscall=yes],
  [php_cv_have_shadow_stack_syscall=no],
  [php_cv_have_shadow_stack_syscall=no])
])
dnl The asm files can't see macro from AC_DEFINE, workaround this via cflag. If
dnl the syscall doesn't exist, we may block the final ELF from __PROPERTY_SHSTK
dnl via redefine macro as "-D__CET__=1".
AS_VAR_IF([php_cv_have_shadow_stack_syscall], [yes],
  [fiber_asm_cflag="-DSHADOW_STACK_SYSCALL=1"],
  [fiber_asm_cflag="-DSHADOW_STACK_SYSCALL=0"])

if test "$fiber_asm" = 'yes'; then
  AC_MSG_CHECKING([for fiber switching context])
  PHP_ADD_SOURCES(Zend/asm, make_${fiber_asm_file}.S jump_${fiber_asm_file}.S, "$fiber_asm_cflag")
  AC_MSG_RESULT([$fiber_asm_file])
else
  if test "$fiber_os" = 'mac'; then
    AC_DEFINE([_XOPEN_SOURCE], 1, [ ])
  fi
  AC_CHECK_HEADER(ucontext.h, [
    AC_DEFINE([ZEND_FIBER_UCONTEXT], 1, [ ])
  ], [
       AC_MSG_ERROR([fibers not available on this platform])
  ])
fi

ZEND_INIT

PHP_ADD_INCLUDE([$abs_srcdir], [1])
PHP_ADD_INCLUDE([$abs_srcdir/main], [1])
PHP_ADD_INCLUDE([$abs_builddir], [1])
PHP_ADD_INCLUDE([$abs_builddir/main], [1])
PHP_ADD_INCLUDE([$abs_builddir/TSRM])
PHP_ADD_INCLUDE([$abs_builddir/Zend])
PHP_ADD_INCLUDE([$abs_srcdir/Zend])
PHP_ADD_INCLUDE([$abs_srcdir/TSRM])

ZEND_EXTRA_LIBS="$LIBS"
unset LIBS

PHP_CONFIGURE_PART(Configuring TSRM)
if test "$PHP_THREAD_SAFETY" = "yes"; then
  TSRM_CHECK_PTHREADS
fi

EXTRA_LDFLAGS="$EXTRA_LDFLAGS $LDFLAGS"
EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM $LDFLAGS"
EXTRA_LIBS="$EXTRA_LIBS $LIBS"
unset LIBS LDFLAGS

AC_ARG_PROGRAM

test "$prefix" = "NONE" && prefix=/usr/local
test "$exec_prefix" = "NONE" && exec_prefix='${prefix}'
test "$program_prefix" = "NONE" && program_prefix=
test "$program_suffix" = "NONE" && program_suffix=

orig_libdir=$libdir
case $libdir in
  '${exec_prefix}/lib')
    libdir=$libdir/php
    ;;
esac
case `eval echo $datadir` in
  '${prefix}/share')
    datadir=$datadir/php
    ;;
esac

phptempdir=`pwd`/libs

old_exec_prefix=$exec_prefix
old_libdir=$libdir
old_datadir=$datadir
exec_prefix=`eval echo $exec_prefix`
libdir=`eval echo $libdir`
datadir=`eval eval echo $datadir`

dnl Build extension directory path.
ZEND_MODULE_API_NO=`$EGREP '#define ZEND_MODULE_API_NO ' $srcdir/Zend/zend_modules.h|"${SED}" 's/#define ZEND_MODULE_API_NO //'`

if test -z "$EXTENSION_DIR"; then
  extbasedir=$ZEND_MODULE_API_NO
  if test "$oldstyleextdir" = "yes"; then
    if test "$PHP_DEBUG" = "1"; then
      part1=debug
    else
      part1=no-debug
    fi
    if test "$enable_zts" = "yes"; then
      part2=zts
    else
      part2=non-zts
    fi
    extbasedir=$part1-$part2-$extbasedir
    EXTENSION_DIR=$libdir/extensions/$extbasedir
  else
    if test "$enable_zts" = "yes"; then
      extbasedir=$extbasedir-zts
    fi

    if test "$PHP_DEBUG" = "1"; then
      extbasedir=$extbasedir-debug
    fi
    EXTENSION_DIR=$libdir/$extbasedir
  fi
fi

case $PHP_LAYOUT in
  GNU)
    datarootdir=$prefix/share
    ;;
  *)
    datarootdir=$prefix/php
    ;;
esac

dnl Expand all directory names for use in macros/constants.
EXPANDED_PEAR_INSTALLDIR=`eval echo $PEAR_INSTALLDIR`
EXPANDED_EXTENSION_DIR=`eval echo $EXTENSION_DIR`
EXPANDED_LOCALSTATEDIR=`eval echo $localstatedir`
EXPANDED_BINDIR=`eval echo $bindir`
EXPANDED_SBINDIR=`eval echo $sbindir`
EXPANDED_MANDIR=`eval echo $mandir`
EXPANDED_LIBDIR=$libdir
EXPANDED_SYSCONFDIR=`eval echo $sysconfdir`
EXPANDED_DATADIR=$datadir
EXPANDED_PHP_CONFIG_FILE_PATH=`eval echo "$PHP_CONFIG_FILE_PATH"`
EXPANDED_PHP_CONFIG_FILE_SCAN_DIR=`eval echo "$PHP_CONFIG_FILE_SCAN_DIR"`
INCLUDE_PATH=.:$EXPANDED_PEAR_INSTALLDIR

exec_prefix=$old_exec_prefix
libdir=$old_libdir
datadir=$old_datadir

AC_SUBST(INCLUDE_PATH)
AC_SUBST(EXPANDED_PEAR_INSTALLDIR)
AC_SUBST(EXPANDED_EXTENSION_DIR)
AC_SUBST(EXPANDED_BINDIR)
AC_SUBST(EXPANDED_SBINDIR)
AC_SUBST(EXPANDED_MANDIR)
AC_SUBST(EXPANDED_LIBDIR)
AC_SUBST(EXPANDED_DATADIR)
AC_SUBST(EXPANDED_SYSCONFDIR)
AC_SUBST(EXPANDED_LOCALSTATEDIR)
AC_SUBST(EXPANDED_PHP_CONFIG_FILE_PATH)
AC_SUBST(EXPANDED_PHP_CONFIG_FILE_SCAN_DIR)
AC_SUBST([PHP_INSTALLED_SAPIS])
AC_SUBST([SAPI_LIBNAME_SHARED])
AC_SUBST([SAPI_LIBNAME_STATIC])

PHP_UTILIZE_RPATHS

PHP_REMOVE_USR_LIB(PHP_LDFLAGS)
PHP_REMOVE_USR_LIB(LDFLAGS)

EXTRA_LDFLAGS="$EXTRA_LDFLAGS $PHP_LDFLAGS"
EXTRA_LDFLAGS_PROGRAM="$EXTRA_LDFLAGS_PROGRAM $PHP_LDFLAGS"

UNAME=`uname -a | xargs`
PHP_UNAME=${PHP_UNAME:-$UNAME}
AC_DEFINE_UNQUOTED(PHP_UNAME,"$PHP_UNAME",[uname -a output])
PHP_OS=`uname | xargs`
AC_DEFINE_UNQUOTED(PHP_OS,"$PHP_OS",[uname output])
PHP_BUILD_SYSTEM=${PHP_BUILD_SYSTEM:-$PHP_UNAME}
AC_DEFINE_UNQUOTED(PHP_BUILD_SYSTEM,"$PHP_BUILD_SYSTEM",[builder uname output])
if test -n "${PHP_BUILD_PROVIDER}"; then
  AC_DEFINE_UNQUOTED(PHP_BUILD_PROVIDER,"$PHP_BUILD_PROVIDER",[build provider])
fi
if test -n "${PHP_BUILD_COMPILER}"; then
  AC_DEFINE_UNQUOTED(PHP_BUILD_COMPILER,"$PHP_BUILD_COMPILER",[used compiler for build])
fi
if test -n "${PHP_BUILD_ARCH}"; then
  AC_DEFINE_UNQUOTED(PHP_BUILD_ARCH,"$PHP_BUILD_ARCH",[build architecture])
fi

PHP_SUBST(PHP_FASTCGI_OBJS)
PHP_SUBST(PHP_SAPI_OBJS)
PHP_SUBST(PHP_BINARY_OBJS)
PHP_SUBST(PHP_GLOBAL_OBJS)

PHP_SUBST(PHP_BINARIES)
PHP_SUBST(PHP_MODULES)
PHP_SUBST(PHP_ZEND_EX)

PHP_SUBST_OLD(abs_builddir)
PHP_SUBST_OLD(abs_srcdir)

PHP_SUBST(bindir)
PHP_SUBST(sbindir)
PHP_SUBST(exec_prefix)
PHP_SUBST_OLD(program_prefix)
PHP_SUBST_OLD(program_suffix)
PHP_SUBST(includedir)
PHP_SUBST_OLD(orig_libdir)
PHP_SUBST(libdir)
PHP_SUBST(mandir)
PHP_SUBST(phptempdir)
PHP_SUBST(prefix)
PHP_SUBST(localstatedir)
PHP_SUBST(datadir)
PHP_SUBST(datarootdir)
PHP_SUBST(sysconfdir)

PHP_SUBST(EXEEXT)
PHP_SUBST(CC)
PHP_SUBST(BUILD_CC)
PHP_SUBST(CFLAGS)
PHP_SUBST(CFLAGS_CLEAN)
PHP_SUBST(CPP)
PHP_SUBST(CPPFLAGS)
PHP_SUBST(CXX)
PHP_SUBST(CXXFLAGS)
PHP_SUBST(CXXFLAGS_CLEAN)
PHP_SUBST_OLD(DEBUG_CFLAGS)
PHP_SUBST_OLD(EXTENSION_DIR)
PHP_SUBST_OLD(EXTRA_LDFLAGS)
PHP_SUBST_OLD(EXTRA_LDFLAGS_PROGRAM)
PHP_SUBST_OLD(EXTRA_LIBS)
PHP_SUBST_OLD(ZEND_EXTRA_LIBS)
PHP_SUBST_OLD(INCLUDES)
PHP_SUBST_OLD(EXTRA_INCLUDES)
PHP_SUBST_OLD(INSTALL_IT)
PHP_SUBST(LIBTOOL)
PHP_SUBST(LN_S)
PHP_SUBST_OLD(NATIVE_RPATHS)
PHP_SUBST_OLD(PHP_LDFLAGS)
PHP_SUBST(OVERALL_TARGET)
PHP_SUBST(PHP_RPATHS)
PHP_SUBST(PHP_SAPI)
PHP_SUBST_OLD(PHP_VERSION)
PHP_SUBST_OLD(PHP_VERSION_ID)
PHP_SUBST(SHELL)
PHP_SUBST(PHP_FRAMEWORKS)
PHP_SUBST(PHP_FRAMEWORKPATH)
PHP_SUBST(INSTALL_HEADERS)

old_CC=$CC

if test "$PHP_THREAD_SAFETY" = "yes" && test -n "$ac_cv_pthreads_cflags"; then
  CXXFLAGS="$CXXFLAGS $ac_cv_pthreads_cflags"
  CPPFLAGS="$CPPFLAGS $ac_cv_pthreads_cflags"
fi

dnl Enable -Werror late, because it may break configure checks throwing warnings.
if test "$PHP_WERROR" = "yes"; then
  CFLAGS="$CFLAGS -Werror"
  CXXFLAGS="$CXXFLAGS -Werror"
fi

if test "$PHP_MEMORY_SANITIZER" = "yes" &&
   test "$PHP_ADDRESS_SANITIZER" = "yes"; then
   AC_MSG_ERROR([MemorySanitizer and AddressSanitizer are mutually exclusive])
fi

dnl Enable -fsanitize=memory late, because interceptors may break linking detection.
if test "$PHP_MEMORY_SANITIZER" = "yes"; then
  AX_CHECK_COMPILE_FLAG([-fsanitize=memory -fsanitize-memory-track-origins], [
    CFLAGS="$CFLAGS -fsanitize=memory -fsanitize-memory-track-origins"
    CXXFLAGS="$CXXFLAGS -fsanitize=memory -fsanitize-memory-track-origins"
  ], [AC_MSG_ERROR([MemorySanitizer is not available])])
fi

if test "$PHP_ADDRESS_SANITIZER" = "yes"; then
  AX_CHECK_COMPILE_FLAG([-fsanitize=address], [
    CFLAGS="$CFLAGS -fsanitize=address -DZEND_TRACK_ARENA_ALLOC"
    CXXFLAGS="$CXXFLAGS -fsanitize=address -DZEND_TRACK_ARENA_ALLOC"
  ], [AC_MSG_ERROR([AddressSanitizer is not available])])
fi

if test "$PHP_UNDEFINED_SANITIZER" = "yes"; then
  AX_CHECK_COMPILE_FLAG([-fsanitize=undefined], [
    CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover=undefined"
    CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover=undefined"
    AX_CHECK_COMPILE_FLAG([-fno-sanitize=object-size], [
      dnl Disable object-size sanitizer, because it is incompatible with our zend_function
      dnl union, and this can't be easily fixed.
      CFLAGS="$CFLAGS -fno-sanitize=object-size"
      CXXFLAGS="$CFLAGS -fno-sanitize=object-size"
    ])

    dnl Clang 17 adds stricter function pointer compatibility checks where pointer args cannot be
    dnl cast to void*. In that case, set -fno-sanitize=function.
    OLD_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS -fno-sanitize-recover=undefined"
    AC_CACHE_CHECK([whether to add -fno-sanitize=function],[php_cv_ubsan_no_function],[
    AC_RUN_IFELSE([AC_LANG_SOURCE([[
void foo(char *string) {}
int main(void) {
  void (*f)(void *) = (void (*)(void *))foo;
  f("foo");
}
    ]])],[php_cv_ubsan_no_function=no],[php_cv_ubsan_no_function=yes],[php_cv_ubsan_no_function=no])])
    CFLAGS="$OLD_CFLAGS"
    if test "$php_cv_ubsan_no_function" = yes; then
      CFLAGS="$CFLAGS -fno-sanitize=function"
      CXXFLAGS="$CFLAGS -fno-sanitize=function"
    fi
  ], [AC_MSG_ERROR([UndefinedBehaviorSanitizer is not available])])
fi

if test "$PHP_MEMORY_SANITIZER" = "yes" ||
   test "$PHP_ADDRESS_SANITIZER" = "yes" ||
   test "$PHP_UNDEFINED_SANITIZER" = "yes"; then
    CFLAGS="$CFLAGS -fno-omit-frame-pointer"
    CXXFLAGS="$CXXFLAGS -fno-omit-frame-pointer"
fi

dnl
dnl Libtool creation.
dnl

PHP_HELP_SEPARATOR([Libtool:])
PHP_CONFIGURE_PART(Configuring libtool)

dnl Silence warning: `ar: 'u' modifier ignored since 'D' is the default`
dnl See https://github.com/php/php-src/pull/3017
AC_SUBST(AR_FLAGS, [cr])

dnl Only allow AC_PROG_CXX and AC_PROG_CXXCPP if they are explicitly called (by
dnl PHP_REQUIRE_CXX). Otherwise AC_PROG_LIBTOOL fails if there is no working C++
dnl compiler.
AC_PROVIDE_IFELSE([PHP_REQUIRE_CXX], [], [
  undefine([AC_PROG_CXX])
  AC_DEFUN([AC_PROG_CXX], [])
  undefine([AC_PROG_CXXCPP])
  AC_DEFUN([AC_PROG_CXXCPP], [php_prog_cxxcpp=disabled])
])
AC_PROG_LIBTOOL

PHP_SET_LIBTOOL_VARIABLE([--silent])

dnl libtool 1.4.3 needs this.
PHP_SET_LIBTOOL_VARIABLE([--preserve-dup-deps])

CC=$old_CC

PHP_CONFIGURE_PART(Generating files)

CXXFLAGS_CLEAN=$CXXFLAGS
CFLAGS_CLEAN="$CFLAGS \$(PROF_FLAGS)"
CFLAGS="\$(CFLAGS_CLEAN) $standard_libtool_flag"
CXXFLAGS="$CXXFLAGS $standard_libtool_flag \$(PROF_FLAGS)"

if test "$PHP_PHAR" != "no" && test "$PHP_CLI" != "no"; then
  pharcmd=pharcmd
  pharcmd_install=install-pharcmd
else
  pharcmd=
  pharcmd_install=
fi;

all_targets="\$(OVERALL_TARGET) \$(PHP_MODULES) \$(PHP_ZEND_EX) \$(PHP_BINARIES) $pharcmd"
install_targets="$install_sapi $install_modules $install_binaries install-build install-headers install-programs $install_pear $pharcmd_install"

PHP_SUBST(all_targets)
PHP_SUBST(install_targets)
PHP_SUBST(install_binary_targets)

PHP_INSTALL_HEADERS([Zend/ TSRM/ main/ main/streams/])
PHP_INSTALL_HEADERS([Zend/Optimizer], [ \
    zend_call_graph.h \
    zend_cfg.h \
    zend_dfg.h \
    zend_dump.h \
    zend_func_info.h \
    zend_inference.h \
    zend_optimizer.h \
    zend_ssa.h \
    zend_worklist.h])

PHP_ADD_SOURCES(TSRM, TSRM.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

PHP_ADD_SOURCES(main, main.c snprintf.c spprintf.c \
       fopen_wrappers.c php_scandir.c \
       php_ini_builder.c \
       php_ini.c SAPI.c rfc1867.c php_content_types.c strlcpy.c \
       strlcat.c explicit_bzero.c reentrancy.c php_variables.c php_ticks.c \
       network.c php_open_temporary_file.c php_odbc_utils.c safe_bcmp.c \
       output.c getopt.c php_syslog.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

if printf "#if __ELF__\nelf\n#endif\n" | $CC -E - | grep elf > /dev/null; then
  PHP_ADD_SOURCES(main, debug_gdb_scripts.c)

  cat >> Makefile.objects <<EOF
$abs_srcdir/main/debug_gdb_scripts.c: $abs_srcdir/scripts/gdb/debug_gdb_scripts_gen.php $abs_srcdir/scripts/gdb/php_gdb.py $abs_srcdir/.gdbinit
	@if test ! -z "\$(PHP)"; then \\
		\$(PHP) $abs_srcdir/scripts/gdb/debug_gdb_scripts_gen.php; \\
	fi;
EOF
fi

PHP_ADD_SOURCES_X(main, fastcgi.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1, PHP_FASTCGI_OBJS, no)

PHP_ADD_SOURCES(main/streams, streams.c cast.c memory.c filter.c \
       plain_wrapper.c userspace.c transports.c xp_socket.c mmap.c \
       glob_wrapper.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

PHP_ADD_SOURCES(/main, internal_functions.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1, sapi)
PHP_ADD_SOURCES_X(/main, internal_functions_cli.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1, PHP_BINARY_OBJS)

PHP_ADD_SOURCES([Zend], [m4_normalize([
  Optimizer/block_pass.c
  Optimizer/compact_literals.c
  Optimizer/compact_vars.c
  Optimizer/dce.c
  Optimizer/dfa_pass.c
  Optimizer/escape_analysis.c
  Optimizer/nop_removal.c
  Optimizer/optimize_func_calls.c
  Optimizer/optimize_temp_vars_5.c
  Optimizer/pass1.c
  Optimizer/pass3.c
  Optimizer/sccp.c
  Optimizer/scdf.c
  Optimizer/zend_call_graph.c
  Optimizer/zend_cfg.c
  Optimizer/zend_dfg.c
  Optimizer/zend_dump.c
  Optimizer/zend_func_info.c
  Optimizer/zend_inference.c
  Optimizer/zend_optimizer.c
  Optimizer/zend_ssa.c
  zend_alloc.c
  zend_API.c
  zend_ast.c
  zend_atomic.c
  zend_attributes.c
  zend_builtin_functions.c
  zend_call_stack.c
  zend_closures.c
  zend_compile.c
  zend_constants.c
  zend_cpuinfo.c
  zend_default_classes.c
  zend_dtrace.c
  zend_enum.c
  zend_exceptions.c
  zend_execute_API.c
  zend_execute.c
  zend_extensions.c
  zend_fibers.c
  zend_float.c
  zend_frameless_function.c
  zend_gc.c
  zend_gdb.c
  zend_generators.c
  zend_hash.c
  zend_highlight.c
  zend_hrtime.c
  zend_inheritance.c
  zend_ini_parser.c
  zend_ini_scanner.c
  zend_ini.c
  zend_interfaces.c
  zend_iterators.c
  zend_language_parser.c
  zend_language_scanner.c
  zend_list.c
  zend_llist.c
  zend_max_execution_timer.c
  zend_multibyte.c
  zend_object_handlers.c
  zend_objects_API.c
  zend_objects.c
  zend_observer.c
  zend_opcode.c
  zend_operators.c
  zend_ptr_stack.c
  zend_signal.c
  zend_smart_str.c
  zend_sort.c
  zend_stack.c
  zend_stream.c
  zend_string.c
  zend_strtod.c
  zend_system_id.c
  zend_variables.c
  zend_virtual_cwd.c
  zend_vm_opcodes.c
  zend_weakrefs.c
  zend.c
])],
  [-DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 $fiber_asm_cflag])

PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/scripts/Makefile.frag,$abs_srcdir/scripts,scripts)
PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/Zend/Makefile.frag,$abs_srcdir/Zend,Zend)

AC_DEFINE([HAVE_BUILD_DEFS_H], 1, [ ])

PHP_ADD_BUILD_DIR([m4_normalize([
  main
  main/streams
  scripts
  scripts/man1
  TSRM
  Zend
  Zend/asm
  Zend/Optimizer
])])

ALL_OUTPUT_FILES="main/build-defs.h \
scripts/phpize scripts/man1/phpize.1 \
scripts/php-config scripts/man1/php-config.1 \
$PHP_OUTPUT_FILES"

dnl Generate build files.
AC_CONFIG_FILES([$ALL_OUTPUT_FILES])

AC_CONFIG_COMMANDS_PRE([PHP_PATCH_CONFIG_HEADERS([main/php_config.h.in])])

AC_CONFIG_COMMANDS([default],[
cat <<X

+--------------------------------------------------------------------+
| License:                                                           |
| This software is subject to the PHP License, available in this     |
| distribution in the file LICENSE. By continuing this installation  |
| process, you are bound by the terms of this license agreement.     |
| If you do not agree with the terms of this license, you must abort |
| the installation process at this point.                            |
+--------------------------------------------------------------------+

Thank you for using PHP.

X
],[

if test "\$CONFIG_FILES" = "$ALL_OUTPUT_FILES" || test "\$CONFIG_FILES" = " $ALL_OUTPUT_FILES" || test -z "\$CONFIG_FILES"; then
  REDO_ALL=yes
fi

dnl Create configuration headers.
dnl ----------------------------------------------------------------------------
cat >Zend/zend_config.h <<FEO
#include <../main/php_config.h>
FEO

dnl Run this only when generating all the files.
if test -n "\$REDO_ALL"; then
  echo "creating main/internal_functions.c"
  AWK="$AWK" sh $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_STATIC" > main/internal_functions.c

  echo "creating main/internal_functions_cli.c"
  AWK="$AWK" sh $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_CLI_STATIC" > main/internal_functions_cli.c

    if test "$PHP_SAPI" = "apache2handler"; then
      if test "$APACHE_VERSION" -ge 2004001; then
        if test -z "$APACHE_THREADED_MPM"; then
cat <<X
+--------------------------------------------------------------------+
|                        *** WARNING ***                             |
|                                                                    |
| You have built PHP for Apache's current non-threaded MPM.          |
| If you change Apache to use a threaded MPM you must reconfigure    |
| PHP with --enable-zts                                              |
X
        fi
      fi
    fi

fi
])
AC_OUTPUT