|
@ -0,0 +1,30 @@ |
|
|
|
|
|
From 6c4a67ece33d9551429490898bb3c793a689e913 Mon Sep 17 00:00:00 2001 |
|
|
|
|
|
From: Colin Watson <cjwatson@debian.org> |
|
|
|
|
|
Date: Thu, 24 Feb 2022 16:04:18 +0000 |
|
|
|
|
|
Subject: [PATCH] Improve detection of -fzero-call-used-regs=all support |
|
|
|
|
|
|
|
|
|
|
|
GCC doesn't tell us whether this option is supported unless it runs into |
|
|
|
|
|
the situation where it would need to emit corresponding code. |
|
|
|
|
|
---
|
|
|
|
|
|
m4/openssh.m4 | 3 +++ |
|
|
|
|
|
1 file changed, 3 insertions(+) |
|
|
|
|
|
|
|
|
|
|
|
--- a/m4/openssh.m4
|
|
|
|
|
|
+++ b/m4/openssh.m4
|
|
|
|
|
|
@@ -14,6 +14,8 @@ AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{
|
|
|
|
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
|
|
|
|
|
#include <stdlib.h> |
|
|
|
|
|
#include <stdio.h> |
|
|
|
|
|
+/* Trivial function to help test for -fzero-call-used-regs */
|
|
|
|
|
|
+void f(int n) {}
|
|
|
|
|
|
int main(int argc, char **argv) { |
|
|
|
|
|
(void)argv; |
|
|
|
|
|
/* Some math to catch -ftrapv problems in the toolchain */ |
|
|
|
|
|
@@ -21,6 +23,7 @@ int main(int argc, char **argv) {
|
|
|
|
|
|
float l = i * 2.1; |
|
|
|
|
|
double m = l / 0.5; |
|
|
|
|
|
long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; |
|
|
|
|
|
+ f(0);
|
|
|
|
|
|
printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); |
|
|
|
|
|
/* |
|
|
|
|
|
* Test fallthrough behaviour. clang 10's -Wimplicit-fallthrough does |