From a1cee78876e72f9d8af1d7fc82919fe95627e84f Mon Sep 17 00:00:00 2001
From: Shahram Najm <masn@ecmwf.int>
Date: Thu, 12 Jan 2017 18:17:58 +0000
Subject: [PATCH] ECC-409: GNU Hurd support

---
 src/grib_api_internal.h | 12 ++++++++----
 tools/grib_tools.h      |  4 ++++
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/grib_api_internal.h b/src/grib_api_internal.h
index e2d1846de..e5dfa4f63 100644
--- a/src/grib_api_internal.h
+++ b/src/grib_api_internal.h
@@ -171,12 +171,16 @@ extern "C" {
  #define DebugAssert(a)
 #endif
 
-/* Compile time assertion - Thanks to Ralf Holly */
-#define COMPILE_TIME_ASSERT(e) \
+#ifdef __gnu_hurd__
+ #define COMPILE_TIME_ASSERT(condition) \
+   extern int compile_time_assert[!!(condition) - 1]
+#else
+ /* Compile time assertion - Thanks to Ralf Holly */
+ #define COMPILE_TIME_ASSERT(condition) \
    do { \
-       enum { assert_static__ = 1/(e) }; \
+       enum { assert_static__ = 1/(condition) }; \
       } while (0)
-
+#endif
 
 #ifndef NDEBUG
  #define DebugAssertAccess(array, index, size) \
diff --git a/tools/grib_tools.h b/tools/grib_tools.h
index 90247a054..09f4f2e37 100644
--- a/tools/grib_tools.h
+++ b/tools/grib_tools.h
@@ -8,6 +8,10 @@
  * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
  */
 
+#ifdef __gnu_hurd__
+ #define _FILE_OFFSET_BITS 64 /* 64-bit offsets off_t not the default on Hurd/i386 */
+#endif
+
 #include "grib_api_internal.h"
 #include <stdio.h>
 #ifndef ECCODES_ON_WINDOWS