GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. # Local configure fragment for sysdeps/x86_64. dnl Check if asm supports AVX512DQ. AC_CACHE_CHECK(for AVX512DQ support in assembler, libc_cv_asm_avx512dq, [dnl cat > conftest.s <<\EOF vandpd (%rax), %zmm6, %zmm1 EOF if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then libc_cv_asm_avx512dq=yes else libc_cv_asm_avx512dq=no fi rm -f conftest*]) if test $libc_cv_asm_avx512dq = yes; then AC_DEFINE(HAVE_AVX512DQ_ASM_SUPPORT) fi dnl Check if -mavx512f works. AC_CACHE_CHECK(for AVX512 support, libc_cv_cc_avx512, [dnl LIBC_TRY_CC_OPTION([-mavx512f], [libc_cv_cc_avx512=$libc_cv_asm_avx512dq], [libc_cv_cc_avx512=no]) ]) if test $libc_cv_cc_avx512 = yes; then AC_DEFINE(HAVE_AVX512_SUPPORT) fi LIBC_CONFIG_VAR([config-cflags-avx512], [$libc_cv_cc_avx512]) dnl Check if -mprefer-vector-width=128 works. AC_CACHE_CHECK(-mprefer-vector-width=128, libc_cv_cc_mprefer_vector_width, [dnl LIBC_TRY_CC_OPTION([-mprefer-vector-width=128], [libc_cv_cc_mprefer_vector_width=yes], [libc_cv_cc_mprefer_vector_width=no]) ]) LIBC_CONFIG_VAR([config-cflags-mprefer-vector-width], [$libc_cv_cc_mprefer_vector_width]) dnl Check whether asm supports Intel MPX AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl cat > conftest.s <<\EOF bndmov %bnd0,(%rsp) EOF if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then libc_cv_asm_mpx=yes else libc_cv_asm_mpx=no fi rm -f conftest*]) if test $libc_cv_asm_mpx = yes; then AC_DEFINE(HAVE_MPX_SUPPORT) fi if test x"$build_mathvec" = xnotset; then build_mathvec=yes fi dnl Check if linker supports static PIE with the fix for dnl dnl https://sourceware.org/bugzilla/show_bug.cgi?id=21782 dnl if test "$static_pie" = yes; then AC_CACHE_CHECK(for linker static PIE support, libc_cv_ld_static_pie, [dnl cat > conftest.s <<\EOF .text .global _start .weak foo _start: leaq foo(%rip), %rax EOF libc_cv_pie_option="-Wl,-pie" if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp $libc_cv_pie_option -o conftest conftest.s 1>&AS_MESSAGE_LOG_FD); then libc_cv_ld_static_pie=yes else libc_cv_ld_static_pie=no fi rm -f conftest*]) if test "$libc_cv_ld_static_pie" != yes; then AC_MSG_ERROR([linker support for static PIE needed]) fi fi dnl It is always possible to access static and hidden symbols in an dnl position independent way. AC_DEFINE(PI_STATIC_AND_HIDDEN) dnl Static PIE is supported. AC_DEFINE(SUPPORT_STATIC_PIE) test -n "$critic_missing" && AC_MSG_ERROR([ *** $critic_missing])