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build: Use AC_USE_SYSTEM_EXTENSIONS instead of ugly AC_EGREP_CPP test.

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In order to use C functions which are not part of C99, e.g. strdup()
and strncmp().

Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Józef Kucia 2017-12-14 11:45:55 +01:00 committed by Alexandre Julliard
parent d100804e91
commit ad8e27166a
1 changed files with 3 additions and 12 deletions
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15
configure.ac
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@ -12,6 +12,8 @@ AC_ARG_VAR([CROSSCC64], [64-bit Windows cross compiler])
AC_ARG_WITH([spirv-tools], AS_HELP_STRING([--with-spirv-tools],
[Build with SPIRV-Tools library (default: disabled)]))
AC_USE_SYSTEM_EXTENSIONS
dnl Check for progs
AM_PROG_AR
AC_PROG_CC
@ -29,7 +31,7 @@ LT_PREREQ([2.4.2])
LT_INIT
dnl Check compiler specific flags
AC_SUBST([VKD3D_CFLAGS], [""])
AC_SUBST([VKD3D_CFLAGS])
AS_IF([test "x${GCC}" = "xyes"],
[VKD3D_CFLAGS="-Wall -pipe"
VKD3D_CHECK_CFLAGS([-std=c99])
@ -39,17 +41,6 @@ AS_IF([test "x${GCC}" = "xyes"],
VKD3D_CHECK_CFLAGS([-Wvla])
VKD3D_CHECK_CFLAGS([-Wl,--no-undefined])])
AC_EGREP_CPP(yes,
[#define _POSIX_C_SOURCE 200809L
#include <unistd.h>
#ifdef _POSIX_VERSION
#if _POSIX_VERSION == 200809L
yes
#endif
#endif],
[AC_DEFINE([_POSIX_C_SOURCE], [200809L], [Define the POSIX version.])],
[])
dnl Check for cross compilers
VKD3D_CHECK_MINGW32_PROG([CROSSCC32], [CROSSTARGET32], [no])
VKD3D_CHECK_MINGW64_PROG([CROSSCC64], [CROSSTARGET64], [no])