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dtucker pushed a commit to branch master
in repository openssh.

commit 41232d25532b4d2ef6c5db62efc0cf50a79d26ca
Author: Darren Tucker <dtucker@dtucker.net>
Date: Sun Sep 10 15:45:38 2023 +1000

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

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).
---
configure.ac | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index e3128dfc..d8816e3f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -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])

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