[gcc r13-4755] Suppress -fstack-protector warning on hppa.

[gcc r13-4755] Suppress -fstack-protector warning on hppa.

[John David Anglin]

https://gcc.gnu.org/g:1dea4fc642a9bc54214090f0a97c811d59bf6a84

commit r13-4755-g1dea4fc642a9bc54214090f0a97c811d59bf6a84
Author: John David Anglin <danglin@gcc.gnu.org>
Date:   Fri Dec 16 21:44:40 2022 +0000

    Suppress -fstack-protector warning on hppa.
    
    Some package builds enable -fstack-protector and -Werror. Since
    -fstack-protector is not supported on hppa because the stack grows
    up, these packages must check for the warning generated by
    -fstack-protector and suppress it on hppa. This is problematic
    since hppa is the only significant architecture where the stack
    grows up.
    
    2022-12-16  John David Anglin  <danglin@gcc.gnu.org>
    
    gcc/ChangeLog:
    
            * config/pa/pa.cc (pa_option_override): Disable -fstack-protector.
    
    gcc/testsuite/ChangeLog:
    
            * lib/target-supports.exp (check_effective_target_static): Return 0
            on hppa*-*-*.

Diff:
---
 gcc/config/pa/pa.cc                   | 3 +++
 gcc/testsuite/lib/target-supports.exp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/gcc/config/pa/pa.cc b/gcc/config/pa/pa.cc
index 54ab486a02d..9f43802075f 100644
--- a/gcc/config/pa/pa.cc
+++ b/gcc/config/pa/pa.cc
@@ -567,6 +567,9 @@ pa_option_override (void)
       flag_reorder_blocks = 1;
     }
 
+  /* Disable -fstack-protector to suppress warning.  */
+  flag_stack_protect = 0;
+
   /* We can't guarantee that .dword is available for 32-bit targets.  */
   if (UNITS_PER_WORD == 4)
     targetm.asm_out.aligned_op.di = NULL;
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 61026785eef..dccd1aed7c5 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -1218,6 +1218,9 @@ proc check_effective_target_static {} {
 
 # Return 1 if the target supports -fstack-protector
 proc check_effective_target_fstack_protector {} {
+    if { [istarget hppa*-*-*] } {
+	return 0;
+    }
     return [check_runtime fstack_protector {
 	#include <string.h>
 	int main (int argc, char *argv[]) {