[openssh-commits] [openssh] 02/02: Stop using -fzero-call-used-regs=all

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dtucker pushed a commit to branch master
in repository openssh.

commit ff220d4010717f7bfbbc02a2400666fb9d24f250
Author: Darren Tucker <dtucker at dtucker.net>
Date:   Tue Nov 21 14:04:34 2023 +1100

    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@
---
 configure.ac | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 92540d03..36e1028e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -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

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