From 16a329e152d8573aed882c8a4c0d65f403ce3a48 Mon Sep 17 00:00:00 2001
From: Martin Szulecki
Date: Thu, 29 Jan 2015 20:23:06 +0100
Subject: Add large file support

---
 configure.ac | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index d7aafbf..7a28800 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,6 +95,33 @@ case "$GLOBAL_CFLAGS" in
 		AC_DEFINE([HAVE_FVISIBILITY], [1], [Define if compiled with -fvisibility=hidden])
 esac
 
+# check for large file support
+AC_SYS_LARGEFILE
+LFS_CFLAGS=''
+if test "$enable_largefile" != no; then
+	if test "$ac_cv_sys_file_offset_bits" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
+	else
+		AC_MSG_CHECKING(for native large file support)
+		AC_RUN_IFELSE([AC_LANG_SOURCE([#include <unistd.h>
+		  int main (int argc, char **argv)
+		  {
+		      exit(!(sizeof(off_t) == 8));
+		  }])],
+		[ac_cv_sys_file_offset_bits=64; AC_DEFINE(_FILE_OFFSET_BITS,64)
+		 AC_MSG_RESULT(yes)],
+		[AC_MSG_RESULT(no)])
+	fi
+	if test "$ac_cv_sys_large_files" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_LARGE_FILES=1"
+	fi
+	AC_FUNC_FSEEKO
+	if test "$ac_cv_sys_largefile_source" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_LARGEFILE_SOURCE=1"
+	fi
+fi
+AC_SUBST(LFS_CFLAGS)
+
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 AC_OUTPUT([
-- 
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