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1c334db4c8
The compile warnings which are explicitly suppressed are: * -Wno-implicit-fallthrough * -Wno-unused-parameter * -Wno-sign-compare * -Wno-clobbered, only with GCC Closes GH-5151
406 lines
11 KiB
Plaintext
406 lines
11 KiB
Plaintext
dnl This file contains Zend specific autoconf macros.
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dnl
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dnl ZEND_CHECK_FLOAT_PRECISION
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dnl
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dnl x87 floating point internal precision control checks
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dnl See: http://wiki.php.net/rfc/rounding
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dnl
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AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
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AC_MSG_CHECKING([for usable _FPU_SETCW])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <fpu_control.h>
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]],[[
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fpu_control_t fpu_oldcw, fpu_cw;
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volatile double result;
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double a = 2877.0;
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volatile double b = 1000000.0;
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_FPU_GETCW(fpu_oldcw);
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fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE;
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_FPU_SETCW(fpu_cw);
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result = a / b;
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_FPU_SETCW(fpu_oldcw);
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]])],[ac_cfp_have__fpu_setcw=yes],[ac_cfp_have__fpu_setcw=no])
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if test "$ac_cfp_have__fpu_setcw" = "yes" ; then
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AC_DEFINE(HAVE__FPU_SETCW, 1, [whether _FPU_SETCW is present and usable])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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AC_MSG_CHECKING([for usable fpsetprec])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <machine/ieeefp.h>
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]],[[
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fp_prec_t fpu_oldprec;
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volatile double result;
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double a = 2877.0;
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volatile double b = 1000000.0;
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fpu_oldprec = fpgetprec();
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fpsetprec(FP_PD);
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result = a / b;
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fpsetprec(fpu_oldprec);
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]])], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no])
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if test "$ac_cfp_have_fpsetprec" = "yes" ; then
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AC_DEFINE(HAVE_FPSETPREC, 1, [whether fpsetprec is present and usable])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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AC_MSG_CHECKING([for usable _controlfp])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <float.h>
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]],[[
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unsigned int fpu_oldcw;
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volatile double result;
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double a = 2877.0;
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volatile double b = 1000000.0;
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fpu_oldcw = _controlfp(0, 0);
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_controlfp(_PC_53, _MCW_PC);
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result = a / b;
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_controlfp(fpu_oldcw, _MCW_PC);
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]])], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no])
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if test "$ac_cfp_have__controlfp" = "yes" ; then
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AC_DEFINE(HAVE__CONTROLFP, 1, [whether _controlfp is present usable])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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AC_MSG_CHECKING([for usable _controlfp_s])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <float.h>
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]],[[
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unsigned int fpu_oldcw, fpu_cw;
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volatile double result;
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double a = 2877.0;
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volatile double b = 1000000.0;
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_controlfp_s(&fpu_cw, 0, 0);
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fpu_oldcw = fpu_cw;
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_controlfp_s(&fpu_cw, _PC_53, _MCW_PC);
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result = a / b;
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_controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC);
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]])], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no])
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if test "$ac_cfp_have__controlfp_s" = "yes" ; then
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AC_DEFINE(HAVE__CONTROLFP_S, 1, [whether _controlfp_s is present and usable])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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AC_MSG_CHECKING([whether FPU control word can be manipulated by inline assembler])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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/* nothing */
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]],[[
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unsigned int oldcw, cw;
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volatile double result;
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double a = 2877.0;
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volatile double b = 1000000.0;
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__asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw));
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cw = (oldcw & ~0x0 & ~0x300) | 0x200;
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__asm__ __volatile__ ("fldcw %0" : : "m" (*&cw));
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result = a / b;
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__asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw));
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]])], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no])
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if test "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then
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AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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])
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dnl
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dnl LIBZEND_BASIC_CHECKS
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dnl
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dnl Basic checks specific for the Zend engine library.
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dnl
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AC_DEFUN([LIBZEND_BASIC_CHECKS],[
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AC_REQUIRE([AC_PROG_CC])
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AC_CHECK_HEADERS([cpuid.h])
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dnl
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dnl LIBZEND_DLSYM_CHECK
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dnl
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dnl Ugly hack to check if dlsym() requires a leading underscore in symbol name.
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dnl
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AC_DEFUN([LIBZEND_DLSYM_CHECK],[
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AC_MSG_CHECKING([whether dlsym() requires a leading underscore in symbol names])
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_LT_AC_TRY_DLOPEN_SELF([
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AC_MSG_RESULT(no)
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], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(DLSYM_NEEDS_UNDERSCORE, 1, [Define if dlsym() requires a leading underscore in symbol names. ])
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], [
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AC_MSG_RESULT(no)
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], [])
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])
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dnl Checks for library functions.
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AC_CHECK_FUNCS(getpid kill finite sigsetjmp)
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ZEND_CHECK_FLOAT_PRECISION
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dnl Test whether double cast to long preserves least significant bits.
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AC_MSG_CHECKING(whether double cast to long preserves least significant bits)
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <limits.h>
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#include <stdlib.h>
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int main()
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{
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if (sizeof(long) == 4) {
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double d = (double) LONG_MIN * LONG_MIN + 2e9;
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if ((long) d == 2e9 && (long) -d == -2e9) {
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exit(0);
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}
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} else if (sizeof(long) == 8) {
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double correct = 18e18 - ((double) LONG_MIN * -2); /* Subtract ULONG_MAX + 1 */
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if ((long) 18e18 == correct) { /* On 64-bit, only check between LONG_MAX and ULONG_MAX */
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exit(0);
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}
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}
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exit(1);
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}
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]])], [
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AC_DEFINE([ZEND_DVAL_TO_LVAL_CAST_OK], 1, [Define if double cast to long preserves least significant bits])
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AC_MSG_RESULT(yes)
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], [
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AC_MSG_RESULT(no)
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], [
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AC_MSG_RESULT(no)
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])
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])
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dnl
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dnl LIBZEND_OTHER_CHECKS
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dnl
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AC_DEFUN([LIBZEND_OTHER_CHECKS],[
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AC_ARG_ENABLE([zts],
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[AS_HELP_STRING([--enable-zts],
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[Enable thread safety])],
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[ZEND_ZTS=$enableval],
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[ZEND_ZTS=no])
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AC_ARG_ENABLE([inline-optimization],
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[AS_HELP_STRING([--disable-inline-optimization],
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[If building zend_execute.lo fails, try this switch])],
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[ZEND_INLINE_OPTIMIZATION=$enableval],
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[ZEND_INLINE_OPTIMIZATION=yes])
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AC_MSG_CHECKING(whether to enable thread-safety)
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AC_MSG_RESULT($ZEND_ZTS)
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AC_MSG_CHECKING(whether to enable inline optimization for GCC)
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AC_MSG_RESULT($ZEND_INLINE_OPTIMIZATION)
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AC_MSG_CHECKING(whether to enable Zend debugging)
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AC_MSG_RESULT($ZEND_DEBUG)
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if test "$ZEND_DEBUG" = "yes"; then
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AC_DEFINE(ZEND_DEBUG,1,[ ])
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echo " $CFLAGS" | grep ' -g' >/dev/null || DEBUG_CFLAGS="-g"
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if test "$CFLAGS" = "-g -O2"; then
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CFLAGS=-g
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fi
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else
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AC_DEFINE(ZEND_DEBUG,0,[ ])
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fi
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test -n "$GCC" && CFLAGS="$CFLAGS -Wall -Wextra -Wno-strict-aliasing -Wno-implicit-fallthrough -Wno-unused-parameter -Wno-sign-compare"
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dnl Check if compiler supports -Wno-clobbered (only GCC)
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AX_CHECK_COMPILE_FLAG([-Wno-clobbered], CFLAGS="$CFLAGS -Wno-clobbered", , [-Werror])
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test -n "$DEBUG_CFLAGS" && CFLAGS="$CFLAGS $DEBUG_CFLAGS"
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if test "$ZEND_ZTS" = "yes"; then
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AC_DEFINE(ZTS,1,[ ])
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CFLAGS="$CFLAGS -DZTS"
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fi
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changequote({,})
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if test -n "$GCC" && test "$ZEND_INLINE_OPTIMIZATION" != "yes"; then
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INLINE_CFLAGS=`echo $ac_n "$CFLAGS $ac_c" | sed s/-O[0-9s]*//`
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else
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INLINE_CFLAGS="$CFLAGS"
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fi
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changequote([,])
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AC_C_INLINE
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AC_SUBST(INLINE_CFLAGS)
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AC_MSG_CHECKING(target system is Darwin)
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if echo "$target" | grep "darwin" > /dev/null; then
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AC_DEFINE([DARWIN], 1, [Define if the target system is darwin])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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dnl Test and set the alignment define for ZEND_MM. This also does the
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dnl logarithmic test for ZEND_MM.
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AC_MSG_CHECKING(for MM alignment and log values)
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <stdio.h>
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#include <stdlib.h>
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typedef union _mm_align_test {
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void *ptr;
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double dbl;
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long lng;
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} mm_align_test;
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#if (defined (__GNUC__) && __GNUC__ >= 2)
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#define ZEND_MM_ALIGNMENT (__alignof__ (mm_align_test))
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#else
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#define ZEND_MM_ALIGNMENT (sizeof(mm_align_test))
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#endif
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int main()
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{
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int i = ZEND_MM_ALIGNMENT;
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int zeros = 0;
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FILE *fp;
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while (i & ~0x1) {
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zeros++;
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i = i >> 1;
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}
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fp = fopen("conftest.zend", "w");
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fprintf(fp, "%d %d\n", ZEND_MM_ALIGNMENT, zeros);
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fclose(fp);
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exit(0);
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}
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]])], [
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LIBZEND_MM_ALIGN=`cat conftest.zend | cut -d ' ' -f 1`
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LIBZEND_MM_ALIGN_LOG2=`cat conftest.zend | cut -d ' ' -f 2`
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AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT, $LIBZEND_MM_ALIGN, [ ])
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AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT_LOG2, $LIBZEND_MM_ALIGN_LOG2, [ ])
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], [], [
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dnl Cross compilation needs something here.
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LIBZEND_MM_ALIGN=8
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])
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AC_MSG_RESULT(done)
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AC_CHECK_FUNCS(mremap)
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AC_ARG_ENABLE([zend-signals],
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[AS_HELP_STRING([--disable-zend-signals],
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[whether to enable zend signal handling])],
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[ZEND_SIGNALS=$enableval],
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[ZEND_SIGNALS=yes])
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AC_CHECK_FUNCS([sigaction], [], [
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ZEND_SIGNALS=no
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])
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if test "$ZEND_SIGNALS" = "yes"; then
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AC_DEFINE(ZEND_SIGNALS, 1, [Use zend signal handling])
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CFLAGS="$CFLAGS -DZEND_SIGNALS"
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fi
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AC_MSG_CHECKING(whether to enable zend signal handling)
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AC_MSG_RESULT($ZEND_SIGNALS)
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])
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AC_MSG_CHECKING(whether /dev/urandom exists)
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if test -r "/dev/urandom" && test -c "/dev/urandom"; then
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AC_DEFINE([HAVE_DEV_URANDOM], 1, [Define if the target system has /dev/urandom device])
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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AC_ARG_ENABLE([gcc-global-regs],
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[AS_HELP_STRING([--disable-gcc-global-regs],
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[whether to enable GCC global register variables])],
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[ZEND_GCC_GLOBAL_REGS=$enableval],
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[ZEND_GCC_GLOBAL_REGS=yes])
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AC_MSG_CHECKING(for global register variables support)
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if test "$ZEND_GCC_GLOBAL_REGS" != "no"; then
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#if defined(__GNUC__)
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# define ZEND_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
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#else
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# define ZEND_GCC_VERSION 0
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#endif
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#if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386)
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# define ZEND_VM_FP_GLOBAL_REG "%esi"
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# define ZEND_VM_IP_GLOBAL_REG "%edi"
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#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__)
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# define ZEND_VM_FP_GLOBAL_REG "%r14"
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# define ZEND_VM_IP_GLOBAL_REG "%r15"
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#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__)
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# define ZEND_VM_FP_GLOBAL_REG "r28"
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# define ZEND_VM_IP_GLOBAL_REG "r29"
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#elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
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# define ZEND_VM_FP_GLOBAL_REG "r28"
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# define ZEND_VM_IP_GLOBAL_REG "r29"
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#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__aarch64__)
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# define ZEND_VM_FP_GLOBAL_REG "x27"
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# define ZEND_VM_IP_GLOBAL_REG "x28"
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#else
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# error "global register variables are not supported"
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#endif
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typedef int (*opcode_handler_t)(void);
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register void *FP __asm__(ZEND_VM_FP_GLOBAL_REG);
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register const opcode_handler_t *IP __asm__(ZEND_VM_IP_GLOBAL_REG);
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int emu(const opcode_handler_t *ip, void *fp) {
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const opcode_handler_t *orig_ip = IP;
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void *orig_fp = FP;
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IP = ip;
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FP = fp;
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while ((*ip)());
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FP = orig_fp;
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IP = orig_ip;
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}
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]], [[
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]])], [
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ZEND_GCC_GLOBAL_REGS=yes
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], [
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ZEND_GCC_GLOBAL_REGS=no
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])
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fi
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if test "$ZEND_GCC_GLOBAL_REGS" = "yes"; then
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AC_DEFINE([HAVE_GCC_GLOBAL_REGS], 1, [Define if the target system has support for global register variables])
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else
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HAVE_GCC_GLOBAL_REGS=no
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fi
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AC_MSG_RESULT($ZEND_GCC_GLOBAL_REGS)
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dnl Check whether __cpuid_count is available.
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AC_CACHE_CHECK(whether __cpuid_count is available, ac_cv_cpuid_count_available, [
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <cpuid.h>
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]], [[
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unsigned eax, ebx, ecx, edx;
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__cpuid_count(0, 0, eax, ebx, ecx, edx);
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]])], [
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ac_cv_cpuid_count_available=yes
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], [
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ac_cv_cpuid_count_available=no
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])])
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if test "$ac_cv_cpuid_count_available" = "yes"; then
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AC_DEFINE([HAVE_CPUID_COUNT], 1, [whether __cpuid_count is available])
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fi
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