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Revert "build: more robustly check for fcf-protection support"

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We no-longer support Clang 7 (#24164).

This reverts commit e9189a750b.
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fanquake 2022-05-30 11:35:41 +01:00
parent b9ef5a10e2
commit a7973bf8f4
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1 changed files with 1 additions and 4 deletions
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configure.ac
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@ -935,10 +935,7 @@ if test "$use_hardening" != "no"; then
AX_CHECK_COMPILE_FLAG([-Wstack-protector], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])
AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"])
dnl -fcf-protection used with Clang 7 causes ld to emit warnings:
dnl ld: error: ... <corrupt x86 feature size: 0x8>
dnl Use CHECK_LINK_FLAG & --fatal-warnings to ensure we won't use the flag in this case.
AX_CHECK_LINK_FLAG([-fcf-protection=full], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fcf-protection=full"], [], [$LDFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-fcf-protection=full], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fcf-protection=full"])
case $host in
*mingw*)