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Update the attributes.m4 macro file from xine

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This file was imported from the xine project. Update it to the current
revision, which resolves the "no AC_LANG_SOURCE call detected in body"
warnings with Autoconf 2.68 or later.

Cc: Diego Pettenò <flameeyes@gmail.com>
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
David Ward 2020-01-03 13:05:51 -05:00 committed by Jaroslav Kysela
parent 59792f467b
commit 9e2bbccfcc
1 changed files with 20 additions and 13 deletions
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33
m4/attributes.m4
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@ -1,6 +1,6 @@
dnl Macros to check the presence of generic (non-typed) symbols.
dnl Copyright (c) 2006-2007 Diego Pettenò <flameeyes@gmail.com>
dnl Copyright (c) 2006-2007 xine project
dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
dnl Copyright (c) 2006-2008 xine project
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
@ -25,7 +25,7 @@ dnl License when using or distributing such scripts, even though portions
dnl of the text of the Macro appear in them. The GNU General Public
dnl License (GPL) does govern all other use of the material that
dnl constitutes the Autoconf Macro.
dnl
dnl
dnl This special exception to the GPL applies to versions of the
dnl Autoconf Macro released by this project. When you make and
dnl distribute a modified version of the Autoconf Macro, you may extend
@ -39,7 +39,7 @@ AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [
AC_CACHE_VAL(AS_TR_SH([cc_cv_cflags_$1]),
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_COMPILE_IFELSE([int a;],
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a;])],
[eval "AS_TR_SH([cc_cv_cflags_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_cflags_$1])='no'"])
CFLAGS="$ac_save_CFLAGS"
@ -71,7 +71,7 @@ AC_DEFUN([CC_CHECK_CFLAG_APPEND], [
)
AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
[CFLAGS="$CFLAGS $1"; $2], [$3])
[CFLAGS="$CFLAGS $1"; DEBUG_CFLAGS="$DEBUG_CFLAGS $1"; $2], [$3])
])
dnl CC_CHECK_CFLAGS_APPEND([FLAG1 FLAG2], [action-if-found], [action-if-not])
@ -89,7 +89,7 @@ AC_DEFUN([CC_CHECK_LDFLAGS], [
AS_TR_SH([cc_cv_ldflags_$1]),
[ac_save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $1"
AC_LINK_IFELSE([int main() { return 1; }],
AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 1; }])],
[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_ldflags_$1])="])
LDFLAGS="$ac_save_LDFLAGS"
@ -109,14 +109,21 @@ AC_DEFUN([CC_NOUNDEFINED], [
dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads
dnl are requested, as different implementations are present; to avoid problems
dnl use -Wl,-z,defs only for those platform not behaving this way.
*-freebsd*) ;;
dnl
dnl MinGW platforms: for libraries required -no-undefined,
dnl use it only for libraries in mingw32-w64
*-freebsd* | *-openbsd*) ;;
*-mingw*)
LDFLAGS_NOUNDEFINED="-no-undefined"
;;
*)
dnl First of all check for the --no-undefined variant of GNU ld. This allows
dnl for a much more readable commandline, so that people can understand what
dnl it does without going to look for what the heck -z defs does.
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
break
if test "x$LDFLAGS_NOUNDEFINED" = "x"; then break; fi
done
;;
esac
@ -147,7 +154,7 @@ AC_DEFUN([CC_CHECK_ATTRIBUTE], [
AS_TR_SH([cc_cv_attribute_$1]),
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
AC_COMPILE_IFELSE([$3],
AC_COMPILE_IFELSE([AC_LANG_SOURCE([$3])],
[eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
CFLAGS="$ac_save_CFLAGS"
@ -257,7 +264,7 @@ AC_DEFUN([CC_FLAG_VISIBILITY], [
cc_cv_flag_visibility='yes',
cc_cv_flag_visibility='no')
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
[AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
[Define this if the compiler supports the -fvisibility flag])
@ -295,11 +302,11 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
for cc_attribute_align_try in 64 32 16 8 4 2; do
AC_COMPILE_IFELSE([
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
int main() {
static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
return c;
}], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
done
CFLAGS="$ac_save_CFLAGS"
])