You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
1.1 KiB
30 lines
1.1 KiB
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
|