From 3be4fe985f5b8084bcbc2180df4abcda5a608757 Mon Sep 17 00:00:00 2001
From: Ming-Hung Tsai <mingnus@gmail.com>
Date: Fri, 27 Nov 2015 23:38:55 +0800
Subject: [PATCH] [build] Add AC_SYS_LARGEFILE to check for large-file support

To use off64_t on 32-bit system
---
 Makefile.in  |  2 ++
 configure.ac | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/Makefile.in b/Makefile.in
index 003cb3d..ac2a2f4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -98,10 +98,12 @@ OBJECTS:=$(subst .cc,.o,$(SOURCE))
 TOP_DIR:=@top_srcdir@
 TOP_BUILDDIR:=@top_builddir@
 CFLAGS+=-g -Wall -O3
+CFLAGS+=@LFS_FLAGS@
 CXXFLAGS+=-g -Wall -fno-strict-aliasing
 CXXFLAGS+=@CXXOPTIMISE_FLAG@
 CXXFLAGS+=@CXXDEBUG_FLAG@
 CXXFLAGS+=@CXX_STRERROR_FLAG@
+CXXFLAGS+=@LFS_FLAGS@
 INCLUDES+=-I$(TOP_BUILDDIR) -I$(TOP_DIR) -I$(TOP_DIR)/thin-provisioning
 LIBS:=-lstdc++ -laio -lexpat
 INSTALL:=@INSTALL@
diff --git a/configure.ac b/configure.ac
index f5e7a2e..5de0fe4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -45,6 +45,16 @@ AC_DEFUN([AC_PROG_STRIP], [AC_CHECK_TOOL(STRIP, strip, :)])
 AC_PROG_STRIP
 AC_ARG_VAR(STRIP, [Command for discarding symbols from object files])
 
+################################################################
+dnl -- Check for large file support
+AC_SYS_LARGEFILE
+if test x$ac_cv_sys_file_offset_bits = x64; then
+    LFS_FLAGS+="-D_FILE_OFFSET_BITS=64"
+fi
+if test x$ac_cv_sys_large_files = x1; then
+    LFS_FLAGS+="-D_LARGE_FILES"
+fi
+
 ################################################################
 dnl -- Checks for functions.
 AC_FUNC_STRERROR_R
@@ -147,6 +157,7 @@ VERSION_PATCHLEVEL=`echo "$VER" | $AWK -F '[[(.]]' '{print $3}'`
 AC_SUBST(CXXDEBUG_FLAG)
 AC_SUBST(CXXOPTIMISE_FLAG)
 AC_SUBST(CXX_STRERROR_FLAG)
+AC_SUBST(LFS_FLAGS)
 AC_SUBST(INSTALL)
 AC_SUBST(prefix)
 AC_SUBST(RELEASE_DATE)