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Add _GNU_SOURCE definition unconditionally (#14651)

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Since Autoconf >= 2.70 the _GNU_SOURCE and some other extensions are
defined unconditionally regardless whether the __EXTENSIONS__ can be
safely defined. Some obsolete Solaris systems once had issues with
compiling a default set of standard system headers when __EXTENSIONS__
was defined. Autoconf 2.69 and earlier checked based on that and defined
the _GNU_SOURCE conditionally. This condition is not relevant on current
systems anymore.
This commit is contained in:
Peter Kokot
2024-06-25 20:07:42 +02:00
committed by GitHub
parent 3cbf5aa63e
commit 909d331d0a
1 changed files with 4 additions and 6 deletions
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10
configure.ac
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@@ -259,12 +259,10 @@ else
AC_MSG_RESULT(no)
fi
dnl The effect of _GNU_SOURCE defined in config.h depeds on includes order
if test "$ac_cv_safe_to_define___extensions__" = yes ; then
AC_MSG_CHECKING(whether to use -D_GNU_SOURCE cflag)
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
AC_MSG_RESULT(yes)
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 ----------------------------------------------------------------------------