[gcc r13-4416] runtime: force XSI strerror on hurd

[Ian Lance Taylor <ian@gcc.gnu.org>]

https://gcc.gnu.org/g:91607eba8fe49c064192122ec60a3e03dd8f2515

commit r13-4416-g91607eba8fe49c064192122ec60a3e03dd8f2515
Author: Ian Lance Taylor <iant@golang.org>
Date:   Wed Nov 30 09:36:52 2022 -0800

    runtime: force XSI strerror on hurd
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/454275

Diff:
---
 gcc/go/gofrontend/MERGE     | 2 +-
 libgo/runtime/go-strerror.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 984d8324004..a26f779557d 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-fef6aa3c1678cdbe7dca454b2cebb369d8ba81bf
+1c5bfd57131b68b91d8400bb017f35d416f7aa7b
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/runtime/go-strerror.c b/libgo/runtime/go-strerror.c
index 13d1d91df84..8ff5ffbdfec 100644
--- a/libgo/runtime/go-strerror.c
+++ b/libgo/runtime/go-strerror.c
@@ -12,7 +12,7 @@
    exists to selectively undefine it and provides an alias to the
    XSI-compliant version of strerror_r(3).  */
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__gnu_hurd__)
 
 /* Force selection of XSI-compliant strerror_r by glibc.  */
 #undef XOPEN_SOURCE
@@ -21,7 +21,7 @@
 #define _POSIX_C_SOURCE 200112L
 #undef _GNU_SOURCE
 
-#endif /* __linux__ */
+#endif /* defined(__linux__) || defined(__gnu_hurd__) */
 
 #include <string.h>