Переписан поиск флагов для поддержки больших файлов

tests/LargeFiles.c

@@ -1,15 +0,0 @@
-#include <sys/types.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
-#define VALID_ARRAY_LENGTH 1
-#define INVALID_ARRAY_LENGTH -1
-
-int main(int argc, const char **argv)
-{
-	int a[(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? VALID_ARRAY_LENGTH : INVALID_ARRAY_LENGTH];
-	off_t offset = ftello(NULL);
-	fseeko(NULL, offset, SEEK_SET);
-	return 0;
-}

tests/LargeFiles64.c

@@ -1,16 +0,0 @@
-#include <sys/types.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
-#define VALID_ARRAY_LENGTH 1
-#define INVALID_ARRAY_LENGTH -1
-
-int main(int argc, const char **argv)
-{
-	int a[(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? VALID_ARRAY_LENGTH : INVALID_ARRAY_LENGTH];
-	off64_t offset = ftello64(NULL);
-	fseeko64(NULL, offset, SEEK_SET);
-	return 0;
-}

tests/LargeFilesWindows.c

@@ -1,8 +0,0 @@
-#include <stdio.h>
-
-int main()
-{
-	__int64 off = 0;
-	_fseeki64(NULL, off, SEEK_SET);
-	return 0;
-}

tests/TestFileOffsetBits.c

@@ -0,0 +1,11 @@
+#include <sys/types.h>
+
+/* Cause a compile-time error if off_t is smaller than 64 bits */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];  
+
+int main(int argc, char **argv)
+{
+  return 0;
+}
+

tests/TestLargeFiles.c.in

@@ -0,0 +1,24 @@
+#cmakedefine _LARGEFILE_SOURCE
+#cmakedefine _LARGEFILE64_SOURCE
+#cmakedefine _LARGE_FILES
+#cmakedefine _FILE_OFFSET_BITS @_FILE_OFFSET_BITS@
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+  /* Cause a compile-time error if off_t is smaller than 64 bits,
+   * and make sure we have ftello / fseeko.
+   */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];
+  FILE *fp = fopen(argv[0],"r");
+  off_t offset = ftello( fp );
+
+  fseeko( fp, offset, SEEK_CUR );
+  fclose(fp);
+  return off_t_is_large[0] || argc;
+}
+

tests/TestWindowsFSeek.c

@@ -0,0 +1,11 @@
+
+#include <stdio.h>
+    
+int main()
+{
+  __int64 off=0;
+
+  _fseeki64(NULL, off, SEEK_SET);
+        
+  return 0;
+}