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Use zero-call-used-regs=used with Apple compilers.

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Apple's versions of clang have version numbers that do not match the
corresponding upstream clang versions.  Unfortunately, they do still
have the clang-15 zero-call-used-regs=all bug, so for now use the value
that doesn't result in segfaults.  We could allowlist future versions
that are known to work.  bz#3584 (and probably also our github CI
failures).
This commit is contained in:
Darren Tucker 2023-09-10 15:45:38 +10:00
parent d6f7e84281
commit ca2937a607
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1 changed files with 8 additions and 2 deletions
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10
configure.ac
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@ -187,7 +187,13 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
AC_MSG_RESULT([$GCC_VER])
AC_MSG_CHECKING([clang version])
CLANG_VER=`$CC -v 2>&1 | $AWK '/clang version /{print $3}'`
ver="`$CC -v 2>&1`"
if echo "$ver" | grep "Apple" >/dev/null; then
CLANG_VER="apple-`echo "$ver" | \
awk '/Apple LLVM/ {print $4"-"$5}'`"
else
CLANG_VER=`echo "$ver" | $AWK '/clang version /{print $3}'`
fi
AC_MSG_RESULT([$CLANG_VER])
OSSH_CHECK_CFLAG_COMPILE([-pipe])
@ -225,7 +231,7 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
# https://github.com/llvm/llvm-project/issues/59242
case "$CLANG_VER" in
15.*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=used]) ;;
15.*|apple*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=used]) ;;
*) OSSH_CHECK_CFLAG_COMPILE([-fzero-call-used-regs=all]) ;;
esac
OSSH_CHECK_CFLAG_COMPILE([-ftrivial-auto-var-init=zero])