Configure: Drop Large File Support macro definitions

Historically we have defined macros like

* `_LARGEFILE_SOURCE`
* `_LARGEFILE64_SOURCE`
* `_LARGE_FILES`
* `_FILE_OFFSET_BITS`

in `Configure.h` to activate large file support in system headers.  This
requires consuming projects to include the header at the beginning of
every translation unit in order to get the macros defined consistently.

Instead these macros should be defined by the build system on the
compiler command line.  Drop them from KWSys in favor of that approach.
The macros are not needed as often as they once were anyway.

CMakeLists.txt

@@ -179,13 +179,6 @@ IF(KWSYS_USE_ConsoleBuf)
   SET(KWSYS_USE_Encoding 1)
 ENDIF()
 
-# Setup the large file support default.
-IF(KWSYS_LFS_DISABLE)
-  SET(KWSYS_LFS_REQUESTED 0)
-ELSE()
-  SET(KWSYS_LFS_REQUESTED 1)
-ENDIF()
-
 # Specify default 8 bit encoding for Windows
 IF(NOT KWSYS_ENCODING_DEFAULT_CODEPAGE)
   SET(KWSYS_ENCODING_DEFAULT_CODEPAGE CP_ACP)
@@ -352,30 +345,6 @@ IF(KWSYS_STANDALONE)
   ENDIF()
 ENDIF()
 
-#-----------------------------------------------------------------------------
-# Configure Large File Support.
-KWSYS_PLATFORM_CXX_TEST(KWSYS_CXX_HAS_CSTDIO
-  "Checking whether header cstdio is available" DIRECT)
-SET(KWSYS_LFS_AVAILABLE 0)
-IF(KWSYS_LFS_REQUESTED)
-  # Large File Support is requested.
-  SET(KWSYS_LFS_REQUESTED 1)
-
-  # Check for large file support.
-  SET(KWSYS_PLATFORM_CXX_TEST_DEFINES
-    -DKWSYS_CXX_HAS_CSTDIO=${KWSYS_CXX_HAS_CSTDIO})
-  KWSYS_PLATFORM_CXX_TEST_RUN(KWSYS_LFS_WORKS
-    "Checking for Large File Support" DIRECT)
-  SET(KWSYS_PLATFORM_CXX_TEST_DEFINES)
-
-  IF(KWSYS_LFS_WORKS)
-    SET(KWSYS_LFS_AVAILABLE 1)
-  ENDIF()
-ELSE()
-  # Large File Support is not requested.
-  SET(KWSYS_LFS_REQUESTED 0)
-ENDIF()
-
 #-----------------------------------------------------------------------------
 # Configure the standard library header wrappers based on compiler's
 # capabilities and parent project's request.  Enforce 0/1 as only
@@ -575,9 +544,6 @@ IF(KWSYS_USE_SystemInformation)
         COMPILE_DEFINITIONS KWSYS_SYS_HAS_MACHINE_CPU_H=1)
     ENDIF()
   ENDIF()
-  IF(KWSYS_LFS_AVAILABLE AND NOT KWSYS_LFS_DISABLE)
-    SET(KWSYS_PLATFORM_CXX_TEST_DEFINES -DKWSYS_HAS_LFS=1)
-  ENDIF()
   KWSYS_PLATFORM_CXX_TEST(KWSYS_CXX_HAS_RLIMIT64
     "Checking whether CXX compiler has rlimit64" DIRECT)
   SET(KWSYS_PLATFORM_CXX_TEST_DEFINES)

Configure.h.in

@@ -28,43 +28,6 @@
 /* Whether kwsys namespace is "kwsys".  */
 #define @KWSYS_NAMESPACE@_NAME_IS_KWSYS @KWSYS_NAME_IS_KWSYS@
 
-/* Whether Large File Support is requested.  */
-#define @KWSYS_NAMESPACE@_LFS_REQUESTED @KWSYS_LFS_REQUESTED@
-
-/* Whether Large File Support is available.  */
-#if @KWSYS_NAMESPACE@_LFS_REQUESTED
-#  define @KWSYS_NAMESPACE@_LFS_AVAILABLE @KWSYS_LFS_AVAILABLE@
-#endif
-
-/* Setup Large File Support if requested.  */
-#if @KWSYS_NAMESPACE@_LFS_REQUESTED
-/* Since LFS is requested this header must be included before system
-   headers whether or not LFS is available. */
-#  if 0 && (defined(_SYS_TYPES_H) || defined(_SYS_TYPES_INCLUDED))
-#    error "@KWSYS_NAMESPACE@/Configure.h must be included before sys/types.h"
-#  endif
-/* Enable the large file API if it is available.  */
-#  if @KWSYS_NAMESPACE@_LFS_AVAILABLE &&                                      \
-    !defined(@KWSYS_NAMESPACE@_LFS_NO_DEFINES)
-#    if !defined(_LARGEFILE_SOURCE) &&                                        \
-      !defined(@KWSYS_NAMESPACE@_LFS_NO_DEFINE_LARGEFILE_SOURCE)
-#      define _LARGEFILE_SOURCE
-#    endif
-#    if !defined(_LARGEFILE64_SOURCE) &&                                      \
-      !defined(@KWSYS_NAMESPACE@_LFS_NO_DEFINE_LARGEFILE64_SOURCE)
-#      define _LARGEFILE64_SOURCE
-#    endif
-#    if !defined(_LARGE_FILES) &&                                             \
-      !defined(@KWSYS_NAMESPACE@_LFS_NO_DEFINE_LARGE_FILES)
-#      define _LARGE_FILES
-#    endif
-#    if !defined(_FILE_OFFSET_BITS) &&                                        \
-      !defined(@KWSYS_NAMESPACE@_LFS_NO_DEFINE_FILE_OFFSET_BITS)
-#      define _FILE_OFFSET_BITS 64
-#    endif
-#  endif
-#endif
-
 /* Setup the export macro.  */
 #if @KWSYS_BUILD_SHARED@
 #  if defined(_WIN32) || defined(__CYGWIN__)

kwsysPlatformTestsCXX.cxx

@@ -136,42 +136,6 @@ int main()
 }
 #endif
 
-#ifdef TEST_KWSYS_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 <assert.h>
-#  include <sys/stat.h>
-#  if KWSYS_CXX_HAS_CSTDIO
-#    include <cstdio>
-#  endif
-#  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;
-}
-#endif
-
 #ifdef TEST_KWSYS_CXX_HAS_SETENV
 #  include <stdlib.h>
 int main()
@@ -212,12 +176,6 @@ int main()
 #endif
 
 #ifdef TEST_KWSYS_CXX_HAS_RLIMIT64
-#  if defined(KWSYS_HAS_LFS)
-#    define _LARGEFILE_SOURCE
-#    define _LARGEFILE64_SOURCE
-#    define _LARGE_FILES
-#    define _FILE_OFFSET_BITS 64
-#  endif
 #  include <sys/resource.h>
 int main()
 {