attributes.m4		attributes.m4
	dnl Macros to check the presence of generic (non-typed) symbols.		dnl Macros to check the presence of generic (non-typed) symbols.
	dnl Copyright (c) 2006-2007 Diego Pettenò <flameeyes@gmail.com>		dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
	dnl Copyright (c) 2006-2007 xine project		dnl Copyright (c) 2006-2008 xine project
			dnl Copyright (c) 2012 Lucas De Marchi <lucas.de.marchi@gmail.com>
	dnl		dnl
	dnl This program is free software; you can redistribute it and/or modify		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		dnl it under the terms of the GNU General Public License as published by
	dnl the Free Software Foundation; either version 2, or (at your option)		dnl the Free Software Foundation; either version 2, or (at your option)
	dnl any later version.		dnl any later version.
	dnl		dnl
	dnl This program is distributed in the hope that it will be useful,		dnl This program is distributed in the hope that it will be useful,
	dnl but WITHOUT ANY WARRANTY; without even the implied warranty of		dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
	dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the		dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	dnl GNU General Public License for more details.		dnl GNU General Public License for more details.
	skipping to change at line 35		skipping to change at line 36
	dnl of the text of the Macro appear in them. The GNU General Public		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 License (GPL) does govern all other use of the material that
	dnl constitutes the Autoconf Macro.		dnl constitutes the Autoconf Macro.
	dnl		dnl
	dnl This special exception to the GPL applies to versions of the		dnl This special exception to the GPL applies to versions of the
	dnl Autoconf Macro released by this project. When you make and		dnl Autoconf Macro released by this project. When you make and
	dnl distribute a modified version of the Autoconf Macro, you may extend		dnl distribute a modified version of the Autoconf Macro, you may extend
	dnl this special exception to the GPL to apply to your modified version as		dnl this special exception to the GPL to apply to your modified version as
	dnl well.		dnl well.
	AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [		dnl Check if FLAG in ENV-VAR is supported by compiler and append it
	AC_CACHE_VAL(AS_TR_SH([cc_cv_cflags_$1]),		dnl to WHERE-TO-APPEND variable
	[ac_save_CFLAGS="$CFLAGS"		dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG])
	CFLAGS="$CFLAGS $1"
	AC_COMPILE_IFELSE([int a;],		AC_DEFUN([CC_CHECK_FLAG_APPEND], [
	[eval "AS_TR_SH([cc_cv_cflags_$1])='yes'"],		AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
	[eval "AS_TR_SH([cc_cv_cflags_$1])='no'"])		AS_TR_SH([cc_cv_$2_$3]),
	CFLAGS="$ac_save_CFLAGS"		[eval "AS_TR_SH([cc_save_$2])='${$2}'"
	])		eval "AS_TR_SH([$2])='$3'"
			AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(voi
	AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],		d) { return a; } ])],
	[$2], [$3])		[eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
			[eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
			eval "AS_TR_SH([$2])='$cc_save_$2'"])
			AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
			[eval "$1='${$1} $3'"])
			])
			dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2])
			AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
			for flag in $3; do
			CC_CHECK_FLAG_APPEND($1, $2, $flag)
			done
	])		])
	AC_DEFUN([CC_CHECK_CFLAGS], [		dnl Check if the flag is supported by linker (cacheable)
	AC_CACHE_CHECK([if $CC supports $1 flag],		dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
	AS_TR_SH([cc_cv_cflags_$1]),
	CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here!
	)
	AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
	[$2], [$3])
	])
	AC_DEFUN([CC_CHECK_LDFLAGS], [		AC_DEFUN([CC_CHECK_LDFLAGS], [
	AC_CACHE_CHECK([if $CC supports $1 flag],		AC_CACHE_CHECK([if $CC supports $1 flag],
	AS_TR_SH([cc_cv_ldflags_$1]),		AS_TR_SH([cc_cv_ldflags_$1]),
	[ac_save_LDFLAGS="$LDFLAGS"		[ac_save_LDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS $1"		LDFLAGS="$LDFLAGS $1"
	AC_LINK_IFELSE([int main() { return 1; }],		AC_LINK_IFELSE([int main() { return 1; }],
	[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],		[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
	[eval "AS_TR_SH([cc_cv_ldflags_$1])="])		[eval "AS_TR_SH([cc_cv_ldflags_$1])="])
	LDFLAGS="$ac_save_LDFLAGS"		LDFLAGS="$ac_save_LDFLAGS"
	])		])
	AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],		AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
	[$2], [$3])		[$2], [$3])
	])		])
			dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for
			dnl the current linker to avoid undefined references in a shared object.
			AC_DEFUN([CC_NOUNDEFINED], [
			dnl We check $host for which systems to enable this for.
			AC_REQUIRE([AC_CANONICAL_HOST])
			case $host in
			dnl FreeBSD (et al.) does not complete linking for shared objects when
			pthreads
			dnl are requested, as different implementations are present; to avoid
			problems
			dnl use -Wl,-z,defs only for those platform not behaving this way.
			*-freebsd* | *-openbsd*) ;;
			*)
			dnl First of all check for the --no-undefined variant of GNU ld. Th
			is allows
			dnl for a much more readable commandline, so that people can unders
			tand what
			dnl it does without going to look for what the heck -z defs does.
			for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
			CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possib
			le_flags"])
			break
			done
			;;
			esac
			AC_SUBST([LDFLAGS_NOUNDEFINED])
			])
	dnl Check for a -Werror flag or equivalent. -Werror is the GCC		dnl Check for a -Werror flag or equivalent. -Werror is the GCC
	dnl and ICC flag that tells the compiler to treat all the warnings		dnl and ICC flag that tells the compiler to treat all the warnings
	dnl as fatal. We usually need this option to make sure that some		dnl as fatal. We usually need this option to make sure that some
	dnl constructs (like attributes) are not simply ignored.		dnl constructs (like attributes) are not simply ignored.
	dnl		dnl
	dnl Other compilers don't support -Werror per se, but they support		dnl Other compilers don't support -Werror per se, but they support
	dnl an equivalent flag:		dnl an equivalent flag:
	dnl - Sun Studio compiler supports -errwarn=%all		dnl - Sun Studio compiler supports -errwarn=%all
	AC_DEFUN([CC_CHECK_WERROR], [		AC_DEFUN([CC_CHECK_WERROR], [
	AC_CACHE_CHECK(		AC_CACHE_CHECK(
	skipping to change at line 97		skipping to change at line 127
	[CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all] )])		[CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all] )])
	])		])
	])		])
	AC_DEFUN([CC_CHECK_ATTRIBUTE], [		AC_DEFUN([CC_CHECK_ATTRIBUTE], [
	AC_REQUIRE([CC_CHECK_WERROR])		AC_REQUIRE([CC_CHECK_WERROR])
	AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2] ) ))],		AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2] ) ))],
	AS_TR_SH([cc_cv_attribute_$1]),		AS_TR_SH([cc_cv_attribute_$1]),
	[ac_save_CFLAGS="$CFLAGS"		[ac_save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $cc_cv_werror"		CFLAGS="$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])='yes'"],
	[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])		[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
	CFLAGS="$ac_save_CFLAGS"		CFLAGS="$ac_save_CFLAGS"
	])		])
	AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],		AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
	[AC_DEFINE(		[AC_DEFINE(
	AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,		AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
	[Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]		[Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
	)		)
	skipping to change at line 221		skipping to change at line 251
	$1],		$1],
	[$2])		[$2])
	])		])
	AC_DEFUN([CC_FUNC_EXPECT], [		AC_DEFUN([CC_FUNC_EXPECT], [
	AC_REQUIRE([CC_CHECK_WERROR])		AC_REQUIRE([CC_CHECK_WERROR])
	AC_CACHE_CHECK([if compiler has __builtin_expect function],		AC_CACHE_CHECK([if compiler has __builtin_expect function],
	[cc_cv_func_expect],		[cc_cv_func_expect],
	[ac_save_CFLAGS="$CFLAGS"		[ac_save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $cc_cv_werror"		CFLAGS="$CFLAGS $cc_cv_werror"
	AC_COMPILE_IFELSE(		AC_COMPILE_IFELSE([AC_LANG_SOURCE(
	[int some_function() {		[int some_function() {
	int a = 3;		int a = 3;
	return (int)__builtin_expect(a, 3);		return (int)__builtin_expect(a, 3);
	}],		}])],
	[cc_cv_func_expect=yes],		[cc_cv_func_expect=yes],
	[cc_cv_func_expect=no])		[cc_cv_func_expect=no])
	CFLAGS="$ac_save_CFLAGS"		CFLAGS="$ac_save_CFLAGS"
	])		])
	AS_IF([test "x$cc_cv_func_expect" = "xyes"],		AS_IF([test "x$cc_cv_func_expect" = "xyes"],
	[AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,		[AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,
	[Define this if the compiler supports __builtin_expect() function])		[Define this if the compiler supports __builtin_expect() function])
	$1],		$1],
	[$2])		[$2])
	])		])
	AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [		AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
	AC_REQUIRE([CC_CHECK_WERROR])		AC_REQUIRE([CC_CHECK_WERROR])
	AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],		AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
	[cc_cv_attribute_aligned],		[cc_cv_attribute_aligned],
	[ac_save_CFLAGS="$CFLAGS"		[ac_save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $cc_cv_werror"		CFLAGS="$CFLAGS $cc_cv_werror"
	for cc_attribute_align_try in 64 32 16 8 4 2; do		for cc_attribute_align_try in 64 32 16 8 4 2; do
	AC_COMPILE_IFELSE([		AC_COMPILE_IFELSE([AC_LANG_SOURCE([
	int main() {		int main() {
	static char c __attribute__ ((aligned($cc_attribute_align_try)) ) = 0;		static char c __attribute__ ((aligned($cc_attribute_align_try)) ) = 0;
	return c;		return c;
	}], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])		}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
	done		done
	CFLAGS="$ac_save_CFLAGS"		CFLAGS="$ac_save_CFLAGS"
	])		])
	if test "x$cc_cv_attribute_aligned" != "x"; then		if test "x$cc_cv_attribute_aligned" != "x"; then
	AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned] ,		AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned] ,
	[Define the highest alignment supported])		[Define the highest alignment supported])
	fi		fi
	])		])
End of changes. 9 change blocks.
	28 lines changed or deleted		64 lines changed or added
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