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Stop using -fzero-call-used-regs=all 

... since it seems to be problematic with several different versions of
clang.  Only use -fzero-call-used-regs=used which is less
problematic, except with Apple's clang where we don't use it at all.
bz#3629, ok djm@
This commit is contained in:
Darren Tucker 2023-11-21 14:04:34 +11:00
parent 2a19e02f36
commit ff220d4010
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1 changed files with 5 additions and 2 deletions
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7
configure.ac
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@ -231,9 +231,12 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
# clang 15 seems to have a bug in -fzero-call-used-regs=all. See
# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
# https://github.com/llvm/llvm-project/issues/59242
# clang 17 has a different bug that causes an ICE when using this
# flag at all (https://bugzilla.mindrot.org/show_bug.cgi?id=3629)
case "$CLANG_VER" in
15.*|apple*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=used]) ;;
*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=all]) ;;
apple-15*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=used]) ;;
17*) ;;
*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=used]) ;;
esac
OSSH_CHECK_CFLAG_COMPILE([-ftrivial-auto-var-init=zero])
fi