From 1036d77b34a5fa15e56f516b81b9928006848cbd Mon Sep 17 00:00:00 2001 From: Damien Miller 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