google3/third_party/grte/v4_src/glibc-2.19/sysdeps/i386/configure - GRTEv4 - Git at Google


 # ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
 # -------------------------------------------------------
 # Tests whether HEADER exists and can be compiled using the include files in
 # INCLUDES, setting the cache variable VAR accordingly.
 ac_fn_c_check_header_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
 if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   eval "$3=yes"
 else
   eval "$3=no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

 } # ac_fn_c_check_header_compile
 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  # Local configure fragment for sysdeps/i386.

 # We no longer support i386 since it lacks the atomic instructions
 # required to implement NPTL threading.
 if test "$config_machine" = i386; then
   as_fn_error $? "
 *** ERROR: Support for i386 is deprecated.
 *** Please use host i786, i686, i585 or i486.
 *** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
 fi

 # The GNU C Library can't be built for i386.  There are several reasons for
 # this restriction.  The primary reason is that i386 lacks the atomic
 # operations required to support the current NPTL implementation.  While it is
 # possible that such atomic operations could be emulated in the kernel to date
 # no such work has been done to enable this.  Even with NPTL disabled you still
 # have no atomic.h implementation.  Given the declining use of i386 we disable
 # support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly
 # check for i386, instead we make sure the compiler has support for inlining
 # the builtin __sync_val_compare_and_swap. If it does then we should have no
 # problem building for i386.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
 $as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
 libc_compiler_builtin_inlined=no
 cat > conftest.c <<EOF
 int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
 EOF
 if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
 		     -O0 -nostdlib -nostartfiles
 		     -S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
 		     1>&5'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }
 then
   libc_compiler_builtin_inlined=yes
 fi
 rm -f conftest*
 if test $libc_compiler_builtin_inlined = yes; then
   libc_cv_unsupported_i386=no
 else
   as_fn_error $? "
 *** Building with -march=i386/-mcpu=i386 is not supported.
 *** Please use host i786, i686, i586, or i486.
 *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
 $as_echo "$libc_compiler_builtin_inlined" >&6; }


 ac_fn_c_check_header_compile "$LINENO" "cpuid.h" "ac_cv_header_cpuid_h" "/* No default includes.  */
 "
 if test "x$ac_cv_header_cpuid_h" = xyes; then :

 else
   as_fn_error $? "gcc must provide the <cpuid.h> header" "$LINENO" 5
 fi


 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSE4 support" >&5
 $as_echo_n "checking for SSE4 support... " >&6; }
 if ${libc_cv_cc_sse4+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -msse4 -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_cc_sse4=yes
 else
   libc_cv_cc_sse4=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse4" >&5
 $as_echo "$libc_cv_cc_sse4" >&6; }
 if test $libc_cv_cc_sse4 = yes; then
   $as_echo "#define HAVE_SSE4_SUPPORT 1" >>confdefs.h

 fi
 config_vars="$config_vars
 config-cflags-sse4 = $libc_cv_cc_sse4"

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler -mtune=i686 support" >&5
 $as_echo_n "checking for assembler -mtune=i686 support... " >&6; }
 if ${libc_cv_as_i686+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -Wa,-mtune=i686 -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_as_i686=yes
 else
   libc_cv_as_i686=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_as_i686" >&5
 $as_echo "$libc_cv_as_i686" >&6; }
 config_vars="$config_vars
 config-asflags-i686 = $libc_cv_as_i686"

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX support" >&5
 $as_echo_n "checking for AVX support... " >&6; }
 if ${libc_cv_cc_avx+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -mavx -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_cc_avx=yes
 else
   libc_cv_cc_avx=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx" >&5
 $as_echo "$libc_cv_cc_avx" >&6; }
 if test $libc_cv_cc_avx = yes; then
   $as_echo "#define HAVE_AVX_SUPPORT 1" >>confdefs.h

 fi
 config_vars="$config_vars
 config-cflags-avx = $libc_cv_cc_avx"

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX encoding of SSE instructions" >&5
 $as_echo_n "checking for AVX encoding of SSE instructions... " >&6; }
 if ${libc_cv_cc_sse2avx+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_cc_sse2avx=yes
 else
   libc_cv_cc_sse2avx=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse2avx" >&5
 $as_echo "$libc_cv_cc_sse2avx" >&6; }
 if test $libc_cv_cc_sse2avx = yes; then
   $as_echo "#define HAVE_SSE2AVX_SUPPORT 1" >>confdefs.h

 fi
 config_vars="$config_vars
 config-cflags-sse2avx = $libc_cv_cc_sse2avx"

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FMA4 support" >&5
 $as_echo_n "checking for FMA4 support... " >&6; }
 if ${libc_cv_cc_fma4+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_cc_fma4=yes
 else
   libc_cv_cc_fma4=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_fma4" >&5
 $as_echo "$libc_cv_cc_fma4" >&6; }
 if test $libc_cv_cc_fma4 = yes; then
   $as_echo "#define HAVE_FMA4_SUPPORT 1" >>confdefs.h

 fi
 config_vars="$config_vars
 have-mfma4 = $libc_cv_cc_fma4"

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -mno-vzeroupper support" >&5
 $as_echo_n "checking for -mno-vzeroupper support... " >&6; }
 if ${libc_cv_cc_novzeroupper+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if { ac_try='${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then :
   libc_cv_cc_novzeroupper=yes
 else
   libc_cv_cc_novzeroupper=no
 fi

 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_novzeroupper" >&5
 $as_echo "$libc_cv_cc_novzeroupper" >&6; }
 config_vars="$config_vars
 config-cflags-novzeroupper = $libc_cv_cc_novzeroupper"

 $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h

	# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
	# -------------------------------------------------------
	# Tests whether HEADER exists and can be compiled using the include files in
	# INCLUDES, setting the cache variable VAR accordingly.
	ac_fn_c_check_header_compile ()
	{
	as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
	$as_echo_n "checking for $2... " >&6; }
	if eval \${$3+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
	/* end confdefs.h. */
	$4
	#include <$2>
	_ACEOF
	if ac_fn_c_try_compile "$LINENO"; then :
	eval "$3=yes"
	else
	eval "$3=no"
	fi
	rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
	fi
	eval ac_res=\$$3
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
	$as_echo "$ac_res" >&6; }
	eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

	} # ac_fn_c_check_header_compile
	# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
	# Local configure fragment for sysdeps/i386.

	# We no longer support i386 since it lacks the atomic instructions
	# required to implement NPTL threading.
	if test "$config_machine" = i386; then
	as_fn_error $? "
	*** ERROR: Support for i386 is deprecated.
	*** Please use host i786, i686, i585 or i486.
	*** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
	fi

	# The GNU C Library can't be built for i386. There are several reasons for
	# this restriction. The primary reason is that i386 lacks the atomic
	# operations required to support the current NPTL implementation. While it is
	# possible that such atomic operations could be emulated in the kernel to date
	# no such work has been done to enable this. Even with NPTL disabled you still
	# have no atomic.h implementation. Given the declining use of i386 we disable
	# support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly
	# check for i386, instead we make sure the compiler has support for inlining
	# the builtin __sync_val_compare_and_swap. If it does then we should have no
	# problem building for i386.
	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
	$as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
	libc_compiler_builtin_inlined=no
	cat > conftest.c <<EOF
	int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
	EOF
	if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
	-O0 -nostdlib -nostartfiles
	-S conftest.c -o - \| fgrep "__sync_val_compare_and_swap"
	1>&5'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }
	then
	libc_compiler_builtin_inlined=yes
	fi
	rm -f conftest*
	if test $libc_compiler_builtin_inlined = yes; then
	libc_cv_unsupported_i386=no
	else
	as_fn_error $? "
	*** Building with -march=i386/-mcpu=i386 is not supported.
	*** Please use host i786, i686, i586, or i486.
	*** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
	$as_echo "$libc_compiler_builtin_inlined" >&6; }


	ac_fn_c_check_header_compile "$LINENO" "cpuid.h" "ac_cv_header_cpuid_h" "/* No default includes. */
	"
	if test "x$ac_cv_header_cpuid_h" = xyes; then :

	else
	as_fn_error $? "gcc must provide the <cpuid.h> header" "$LINENO" 5
	fi



	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSE4 support" >&5
	$as_echo_n "checking for SSE4 support... " >&6; }
	if ${libc_cv_cc_sse4+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -msse4 -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_cc_sse4=yes
	else
	libc_cv_cc_sse4=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse4" >&5
	$as_echo "$libc_cv_cc_sse4" >&6; }
	if test $libc_cv_cc_sse4 = yes; then
	$as_echo "#define HAVE_SSE4_SUPPORT 1" >>confdefs.h

	fi
	config_vars="$config_vars
	config-cflags-sse4 = $libc_cv_cc_sse4"

	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler -mtune=i686 support" >&5
	$as_echo_n "checking for assembler -mtune=i686 support... " >&6; }
	if ${libc_cv_as_i686+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -Wa,-mtune=i686 -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_as_i686=yes
	else
	libc_cv_as_i686=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_as_i686" >&5
	$as_echo "$libc_cv_as_i686" >&6; }
	config_vars="$config_vars
	config-asflags-i686 = $libc_cv_as_i686"

	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX support" >&5
	$as_echo_n "checking for AVX support... " >&6; }
	if ${libc_cv_cc_avx+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -mavx -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_cc_avx=yes
	else
	libc_cv_cc_avx=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx" >&5
	$as_echo "$libc_cv_cc_avx" >&6; }
	if test $libc_cv_cc_avx = yes; then
	$as_echo "#define HAVE_AVX_SUPPORT 1" >>confdefs.h

	fi
	config_vars="$config_vars
	config-cflags-avx = $libc_cv_cc_avx"

	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX encoding of SSE instructions" >&5
	$as_echo_n "checking for AVX encoding of SSE instructions... " >&6; }
	if ${libc_cv_cc_sse2avx+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_cc_sse2avx=yes
	else
	libc_cv_cc_sse2avx=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse2avx" >&5
	$as_echo "$libc_cv_cc_sse2avx" >&6; }
	if test $libc_cv_cc_sse2avx = yes; then
	$as_echo "#define HAVE_SSE2AVX_SUPPORT 1" >>confdefs.h

	fi
	config_vars="$config_vars
	config-cflags-sse2avx = $libc_cv_cc_sse2avx"

	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for FMA4 support" >&5
	$as_echo_n "checking for FMA4 support... " >&6; }
	if ${libc_cv_cc_fma4+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_cc_fma4=yes
	else
	libc_cv_cc_fma4=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_fma4" >&5
	$as_echo "$libc_cv_cc_fma4" >&6; }
	if test $libc_cv_cc_fma4 = yes; then
	$as_echo "#define HAVE_FMA4_SUPPORT 1" >>confdefs.h

	fi
	config_vars="$config_vars
	have-mfma4 = $libc_cv_cc_fma4"

	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -mno-vzeroupper support" >&5
	$as_echo_n "checking for -mno-vzeroupper support... " >&6; }
	if ${libc_cv_cc_novzeroupper+:} false; then :
	$as_echo_n "(cached) " >&6
	else
	if { ac_try='${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null'
	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
	(eval $ac_try) 2>&5
	ac_status=$?
	$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
	test $ac_status = 0; }; }; then :
	libc_cv_cc_novzeroupper=yes
	else
	libc_cv_cc_novzeroupper=no
	fi

	fi
	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_novzeroupper" >&5
	$as_echo "$libc_cv_cc_novzeroupper" >&6; }
	config_vars="$config_vars
	config-cflags-novzeroupper = $libc_cv_cc_novzeroupper"

	$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h