cheng/libsodium
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Disable AVX512 when using ancient versions of GCC

Browse Source
This commit is contained in:
Frank Denis 2018-10-31 10:38:09 +01:00
parent a8abbec660
commit e60bb52a33
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
configure.ac
View File

@ -330,10 +330,12 @@ AX_CHECK_LINK_FLAG([-Wl,-z,relro], [LDFLAGS="$LDFLAGS -Wl,-z,relro"])
AX_CHECK_LINK_FLAG([-Wl,-z,now], [LDFLAGS="$LDFLAGS -Wl,-z,now"])
AX_CHECK_LINK_FLAG([-Wl,-z,noexecstack], [LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"])
AC_MSG_CHECKING(for a broken clang + AVX512 combination)
AC_MSG_CHECKING(for obsolete compiler with possibly broken AVX512 support)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
#if !(defined(__AVX512F__) && defined(__clang__) && __clang_major__ < 4)
#error Not a broken clang + AVX512 combination
#if !(defined(__AVX512F__) && \
((defined(__clang__) && __clang_major__ < 4) || \
(defined(__GNUC__) && __GNUC__ < 6)))
#error Compiler should properly support AVX512 opcodes
#endif
]])],
[AC_MSG_RESULT(yes - disabling AVX512 optimizations)