Move PHP_TARGET_RDYNAMIC check to global acinclude.m4 and use it

in thttpd's config.m4.

acinclude.m4

@@ -4,6 +4,26 @@ dnl This file contains local autoconf functions.
 
 sinclude(dynlib.m4)
 
+dnl
+dnl PHP_TARGET_RDYNAMIC
+dnl
+dnl Checks whether -rdynamic is supported by the compiler.  This
+dnl is necessary for some targets to populate the global symbol
+dnl table.  Otherwise, dynamic modules would not be able to resolve
+dnl PHP-related symbols.
+dnl
+dnl If successful, adds -rdynamic to PHP_LDFLAGS.
+dnl
+AC_DEFUN(PHP_TARGET_RDYNAMIC,[
+  if test -n "$GCC"; then
+    dnl we should use a PHP-specific macro here
+    TSRM_CHECK_GCC_ARG(-rdynamic, gcc_rdynamic=yes)
+    if test "$gcc_rdynamic" = "yes"; then
+      PHP_LDFLAGS="$PHP_LDFLAGS -rdynamic"
+    fi
+  fi
+])
+
 AC_DEFUN(PHP_REMOVE_USR_LIB,[
   unset ac_new_flags
   for i in [$]$1; do

sapi/apache/config.m4

@@ -1,14 +1,5 @@
 dnl ## -*- sh -*-
 
-AC_DEFUN(PHP_APACHE_CHECK_RDYNAMIC,[
-  if test -n "$GCC"; then
-    dnl we should use a PHP-specific macro here
-    TSRM_CHECK_GCC_ARG(-rdynamic, gcc_rdynamic=yes)
-    if test "$gcc_rdynamic" = "yes"; then
-      PHP_LDFLAGS="$PHP_LDFLAGS -rdynamic"
-    fi
-  fi
-])
 
 AC_MSG_CHECKING(for Apache module support via DSO through APXS)
 AC_ARG_WITH(apxs,
@@ -231,7 +222,7 @@ AC_ARG_WITH(mod_charset,
 ])
 
 if test -n "$APACHE_MODULE"; then
-  PHP_APACHE_CHECK_RDYNAMIC
+  PHP_TARGET_RDYNAMIC
   $php_shtool mkdir -p sapi/apache
   PHP_OUTPUT(sapi/apache/libphp4.module)
   PHP_BUILD_STATIC

sapi/thttpd/config.m4

@@ -2,6 +2,7 @@ AC_ARG_WITH(thttpd,
 [  --with-thttpd=SRCDIR    Build PHP as thttpd module],[
   test -d $withval || AC_MSG_RESULT(thttpd directory does not exist ($withval))
   PHP_EXPAND_PATH($withval, THTTPD)
+  PHP_TARGET_RDYNAMIC
   INSTALL_IT="\
     echo 'PHP_LIBS = -L. -lphp4 \$(PHP_LIBS) \$(EXTRA_LIBS)' > $THTTPD/php_makefile; \
     echo 'PHP_LDFLAGS = \$(NATIVE_RPATHS) \$(PHP_LDFLAGS)' >> $THTTPD/php_makefile; \