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From 1036d77b34a5fa15e56f516b81b9928006848cbd Mon Sep 17 00:00:00 2001
From: Damien Miller <djm@mindrot.org>
Date: Fri, 22 Dec 2023 17:56:26 +1100
Subject: [PATCH] better detection of broken -fzero-call-used-regs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
gcc 13.2.0 on ppc64le refuses to compile some function, including
cipher.c:compression_alg_list() with an error:
> sorry, unimplemented: argument ‘used’ is not supportedcw
> for ‘-fzero-call-used-regs’ on this target
This extends the autoconf will-it-work test with a similarly-
structured function that seems to catch this.
Spotted/tested by Colin Watson; bz3645
---
Taken from upsteam, and for Guix by jackhill@jackhill.us
Thanks Marcel van der Boom for noticing: https://issues.guix.gnu.org/67948#2
m4/openssh.m4 | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/m4/openssh.m4 b/m4/openssh.m4
index 5d4c56280..033df501c 100644
--- a/m4/openssh.m4
+++ b/m4/openssh.m4
@@ -20,18 +20,24 @@ char *f2(char *s, ...) {
va_end(args);
return strdup(ret);
}
+const char *f3(int s) {
+ return s ? "good" : "gooder";
+}
int main(int argc, char **argv) {
- (void)argv;
char b[256], *cp;
+ const char *s;
/* Some math to catch -ftrapv problems in the toolchain */
int i = 123 * argc, j = 456 + argc, k = 789 - argc;
float l = i * 2.1;
double m = l / 0.5;
long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+ (void)argv;
f(1);
- snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+ s = f3(f(2));
+ snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
if (write(1, b, 0) == -1) exit(0);
- cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+ cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+ if (write(1, cp, 0) == -1) exit(0);
free(cp);
/*
* Test fallthrough behaviour. clang 10's -Wimplicit-fallthrough does
--
2.41.0
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