misc/cgo/testcarchive: don't use == for string equality in C code

For https://gcc.gnu.org/PR99553

Change-Id: I29a7fbfd89963d4139bc19af99330d70567938ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/300993
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>

diff --git a/misc/cgo/testcarchive/testdata/main_unix.c b/misc/cgo/testcarchive/testdata/main_unix.c
index b23ac1c2428bac3abcf1d242c44b3c42e19abcd8..bd00f9d233995f771575c66109f11f92f1396dd6 100644 (file)
--- a/misc/cgo/testcarchive/testdata/main_unix.c
+++ b/misc/cgo/testcarchive/testdata/main_unix.c
@@ -36,7 +36,7 @@ int install_handler() {
                return 2;
        }
        // gccgo does not set SA_ONSTACK for SIGSEGV.
-       if (getenv("GCCGO") == "" && (osa.sa_flags&SA_ONSTACK) == 0) {
+       if (getenv("GCCGO") == NULL && (osa.sa_flags&SA_ONSTACK) == 0) {
                fprintf(stderr, "Go runtime did not install signal handler\n");
                return 2;
        }