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| author | Fangrui Song <maskray@google.com> | 2021-10-11 11:14:02 -0700 |
|---|---|---|
| committer | Fangrui Song <maskray@google.com> | 2021-10-11 11:14:02 -0700 |
| commit | bf433b849ae6f0cacf566a458c918bfd492ee732 (patch) | |
| tree | b84cb04c0e82799e0105a84a5765a7c095c4e1a2 /sysdeps/x86_64/configure.ac | |
| parent | eb73b87897798de981dbbf019aa957045d768adb (diff) | |
| download | glibc-bf433b849ae6f0cacf566a458c918bfd492ee732.tar.gz glibc-bf433b849ae6f0cacf566a458c918bfd492ee732.tar.xz glibc-bf433b849ae6f0cacf566a458c918bfd492ee732.zip | |
elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT)
Intel MPX failed to gain wide adoption and has been deprecated for a while. GCC 9.1 removed Intel MPX support. Linux kernel removed MPX in 2019. This patch removes the support code from the dynamic loader. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/configure.ac')
| -rw-r--r-- | sysdeps/x86_64/configure.ac | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac index 29e14033c0..c4c748c1d0 100644 --- a/sysdeps/x86_64/configure.ac +++ b/sysdeps/x86_64/configure.ac @@ -10,21 +10,6 @@ LIBC_TRY_CC_OPTION([-mprefer-vector-width=128], 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 |