1 files changed, 28 insertions, 0 deletions
diff --git a/Source/kwsys/RequireLargeFilesSupport.cxx b/Source/kwsys/RequireLargeFilesSupport.cxx
new file mode 100644
index 0000000..596bd60
--- /dev/null
+++ b/Source/kwsys/RequireLargeFilesSupport.cxx
@@ -0,0 +1,28 @@
+#define _LARGEFILE_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, 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;
+}
+