061991fe60
it appears a one-character typo in the cmake_minimum_required line prevents it from compiling under CMake 4.0. in order to fix that, I had to take this thing out of submodules... it is recommended to do this after you pull; git submodule deinit extern/libsndfile
81 lines
2.6 KiB
Plaintext
81 lines
2.6 KiB
Plaintext
# ===========================================================================
|
|
# https://www.gnu.org/software/autoconf-archive/ax_add_fortify_source.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_ADD_FORTIFY_SOURCE
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# Check whether -D_FORTIFY_SOURCE=2 can be added to CPPFLAGS without macro
|
|
# redefinition warnings, other cpp warnings or linker. Some distributions
|
|
# (such as Gentoo Linux) enable _FORTIFY_SOURCE globally in their
|
|
# compilers, leading to unnecessary warnings in the form of
|
|
#
|
|
# <command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
|
|
# <built-in>: note: this is the location of the previous definition
|
|
#
|
|
# which is a problem if -Werror is enabled. This macro checks whether
|
|
# _FORTIFY_SOURCE is already defined, and if not, adds -D_FORTIFY_SOURCE=2
|
|
# to CPPFLAGS.
|
|
#
|
|
# Newer mingw-w64 msys2 package comes with a bug in
|
|
# headers-git-7.0.0.5546.d200317d-1. It broke -D_FORTIFY_SOURCE support,
|
|
# and would need -lssp or -fstack-protector. See
|
|
# https://github.com/msys2/MINGW-packages/issues/5803. Try to actually
|
|
# link it.
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2017 David Seifert <soap@gentoo.org>
|
|
# Copyright (c) 2019 Reini Urban <rurban@cpan.org>
|
|
#
|
|
# Copying and distribution of this file, with or without modification, are
|
|
# permitted in any medium without royalty provided the copyright notice
|
|
# and this notice are preserved. This file is offered as-is, without any
|
|
# warranty.
|
|
|
|
#serial 4
|
|
|
|
AC_DEFUN([AX_ADD_FORTIFY_SOURCE],[
|
|
ac_save_cflags=$CFLAGS
|
|
ac_cwerror_flag=yes
|
|
AX_CHECK_COMPILE_FLAG([-Werror],[CFLAGS="$CFLAGS -Werror"])
|
|
AC_MSG_CHECKING([whether to add -D_FORTIFY_SOURCE=2 to CPPFLAGS])
|
|
AC_LINK_IFELSE([
|
|
AC_LANG_PROGRAM([],
|
|
[[
|
|
#ifndef _FORTIFY_SOURCE
|
|
return 0;
|
|
#else
|
|
this_is_an_error;
|
|
#endif
|
|
]]
|
|
)],
|
|
AC_LINK_IFELSE([
|
|
AC_LANG_SOURCE([[
|
|
#define _FORTIFY_SOURCE 2
|
|
#include <string.h>
|
|
int main() {
|
|
char *s = " ";
|
|
strcpy(s, "x");
|
|
return strlen(s)-1;
|
|
}
|
|
]]
|
|
)],
|
|
[
|
|
AC_MSG_RESULT([yes])
|
|
CFLAGS=$ac_save_cflags
|
|
CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"
|
|
], [
|
|
AC_MSG_RESULT([no])
|
|
CFLAGS=$ac_save_cflags
|
|
],
|
|
),
|
|
[
|
|
AC_MSG_RESULT([no])
|
|
CFLAGS=$ac_save_cflags
|
|
])
|
|
])
|