| 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 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) |
| |
| test -n "$critic_missing" && AC_MSG_ERROR([ |
| *** $critic_missing]) |
