From dc90cfc1c2619b3e5455ed2da6a627e1296f1cbc Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Tue, 18 Oct 2011 11:44:32 -0500
Subject: [svn-r21596] Correct large file support test

---
 config/cmake/ConfigureChecks.cmake | 31 +++++++++++++++++++++++++++++--
 config/cmake/HDF5Tests.c           | 31 +++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 2 deletions(-)

diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake
index 4b2b887..98891ee 100644
--- a/config/cmake/ConfigureChecks.cmake
+++ b/config/cmake/ConfigureChecks.cmake
@@ -295,16 +295,43 @@ ENDIF (H5_HAVE_STDINT_H AND CMAKE_CXX_COMPILER_LOADED)
 SET (LINUX_LFS 0)
 
 SET (HDF5_EXTRA_FLAGS)
-IF (CMAKE_SYSTEM MATCHES "Linux-([3-9]\\.[0-9]|2\\.[4-9])\\.")
+#IF (CMAKE_SYSTEM MATCHES "Linux-([3-9]\\.[0-9]|2\\.[4-9])\\.")
+IF (NOT WINDOWS)
   # Linux Specific flags
   SET (HDF5_EXTRA_FLAGS -D_POSIX_SOURCE -D_BSD_SOURCE)
   OPTION (HDF5_ENABLE_LARGE_FILE "Enable support for large (64-bit) files on Linux." ON)
   IF (HDF5_ENABLE_LARGE_FILE)
+    SET (msg "Performing TEST_LFS_WORKS")
+    TRY_RUN (TEST_LFS_WORKS_RUN   TEST_LFS_WORKS_COMPILE
+        ${HDF5_BINARY_DIR}/CMake
+        ${HDF5_RESOURCES_DIR}/HDF5Tests.c
+        CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=-DTEST_LFS_WORKS
+        OUTPUT_VARIABLE OUTPUT
+    )
+    IF (TEST_LFS_WORKS_COMPILE)
+      IF (TEST_LFS_WORKS_RUN  MATCHES 0)
+        SET (TEST_LFS_WORKS 1 CACHE INTERNAL ${msg})
     SET (LARGEFILE 1)
     SET (HDF5_EXTRA_FLAGS ${HDF5_EXTRA_FLAGS} -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE)
+        MESSAGE (STATUS "${msg}... yes")
+      ELSE (TEST_LFS_WORKS_RUN  MATCHES 0)
+        SET (TEST_LFS_WORKS "" CACHE INTERNAL ${msg})
+        MESSAGE (STATUS "${msg}... no")
+        FILE (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
+              "Test TEST_LFS_WORKS Run failed with the following output and exit code:\n ${OUTPUT}\n"
+        )
+      ENDIF (TEST_LFS_WORKS_RUN  MATCHES 0)
+    ELSE (TEST_LFS_WORKS_COMPILE )
+      SET (TEST_LFS_WORKS "" CACHE INTERNAL ${msg})
+      MESSAGE (STATUS "${msg}... no")
+      FILE (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
+          "Test TEST_LFS_WORKS Compile failed with the following output:\n ${OUTPUT}\n"
+      )
+    ENDIF (TEST_LFS_WORKS_COMPILE)
   ENDIF (HDF5_ENABLE_LARGE_FILE)
   SET (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} ${HDF5_EXTRA_FLAGS})
-ENDIF (CMAKE_SYSTEM MATCHES "Linux-([3-9]\\.[0-9]|2\\.[4-9])\\.")
+ENDIF (NOT WINDOWS)
+#ENDIF (CMAKE_SYSTEM MATCHES "Linux-([3-9]\\.[0-9]|2\\.[4-9])\\.")
 
 ADD_DEFINITIONS (${HDF5_EXTRA_FLAGS})
 
diff --git a/config/cmake/HDF5Tests.c b/config/cmake/HDF5Tests.c
index f580bbc..79741a8 100644
--- a/config/cmake/HDF5Tests.c
+++ b/config/cmake/HDF5Tests.c
@@ -336,6 +336,37 @@ int main()
 }
 #endif
 
+#ifdef TEST_LFS_WORKS
+/* Return 0 when LFS is available and 1 otherwise.  */
+#define _LARGEFILE_SOURCE
+#define _LARGEFILE64_SOURCE
+#define _LARGE_FILES
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <assert.h>
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+  /* check that off_t can hold 2^63 - 1 and perform basic operations... */
+#define OFF_T_64 (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  if (OFF_T_64 % 2147483647 != 1)
+    return 1;
+
+  // stat breaks on SCO OpenServer
+  struct stat buf;
+  stat( argv[0], &buf );
+  if (!S_ISREG(buf.st_mode))
+    return 2;
+
+  FILE *file = fopen( argv[0], "r" );
+  off_t offset = ftello( file );
+  fseek( file, offset, SEEK_CUR );
+  fclose( file );
+  return 0;
+}
+#endif
 
 #ifdef GETTIMEOFDAY_GIVES_TZ
 #ifdef HAVE_SYS_TIME_H
-- 
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