[glibc/release/2.31/master] math/test-sinl-pseudo: Use stack protector only if available

[Aurelien Jarno]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=03f44ce093844d391b9e53879fb1f45cf4f05f62

commit 03f44ce093844d391b9e53879fb1f45cf4f05f62
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu Feb 13 17:01:15 2020 +0100

    math/test-sinl-pseudo: Use stack protector only if available
    
    This fixes commit 9333498794cde1d5cca518bad ("Avoid ldbl-96 stack
    corruption from range reduction of pseudo-zero (bug 25487).").
    
    (cherry picked from commit c10acd40262486dac597001aecc20ad9d3bd0e4a)

Diff:
---
 sysdeps/ieee754/ldbl-96/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sysdeps/ieee754/ldbl-96/Makefile b/sysdeps/ieee754/ldbl-96/Makefile
index 318628aed6..6030adf7e7 100644
--- a/sysdeps/ieee754/ldbl-96/Makefile
+++ b/sysdeps/ieee754/ldbl-96/Makefile
@@ -18,5 +18,7 @@
 
 ifeq ($(subdir),math)
 tests += test-canonical-ldbl-96 test-totalorderl-ldbl-96 test-sinl-pseudo
+ifeq ($(have-ssp),yes)
 CFLAGS-test-sinl-pseudo.c += -fstack-protector-all
 endif
+endif # $(subdir) == math