From 4b525183988bc88f2c49b59ed50d1610656e0fd6 Mon Sep 17 00:00:00 2001
From: Elliot Ronaghan <ronawho@gmail.com>
Date: Tue, 14 Jun 2016 15:26:53 -0700
Subject: [PATCH] Add Cray compiler's equivalent of -Werror before
 __attribute__ checks

Cray uses -herror_on_warning instead of -Werror. Use it everywhere -Werror is
currently used for __attribute__ checks so configure actually detects they're
not supported.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index a864ce65..f1a34c3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -504,6 +504,7 @@ fi
 dnl Check for tls_model attribute support (clang 3.0 still lacks support).
 SAVED_CFLAGS="${CFLAGS}"
 JE_CFLAGS_APPEND([-Werror])
+JE_CFLAGS_APPEND([-herror_on_warning])
 JE_COMPILABLE([tls_model attribute], [],
               [static __thread int
                __attribute__((tls_model("initial-exec"), unused)) foo;
@@ -519,6 +520,7 @@ fi
 dnl Check for alloc_size attribute support.
 SAVED_CFLAGS="${CFLAGS}"
 JE_CFLAGS_APPEND([-Werror])
+JE_CFLAGS_APPEND([-herror_on_warning])
 JE_COMPILABLE([alloc_size attribute], [#include <stdlib.h>],
               [void *foo(size_t size) __attribute__((alloc_size(1)));],
               [je_cv_alloc_size])
@@ -529,6 +531,7 @@ fi
 dnl Check for format(gnu_printf, ...) attribute support.
 SAVED_CFLAGS="${CFLAGS}"
 JE_CFLAGS_APPEND([-Werror])
+JE_CFLAGS_APPEND([-herror_on_warning])
 JE_COMPILABLE([format(gnu_printf, ...) attribute], [#include <stdlib.h>],
               [void *foo(const char *format, ...) __attribute__((format(gnu_printf, 1, 2)));],
               [je_cv_format_gnu_printf])
@@ -539,6 +542,7 @@ fi
 dnl Check for format(printf, ...) attribute support.
 SAVED_CFLAGS="${CFLAGS}"
 JE_CFLAGS_APPEND([-Werror])
+JE_CFLAGS_APPEND([-herror_on_warning])
 JE_COMPILABLE([format(printf, ...) attribute], [#include <stdlib.h>],
               [void *foo(const char *format, ...) __attribute__((format(printf, 1, 2)));],
               [je_cv_format_printf])