[Mesa-dev] [PATCH] configure.ac: Add AC_SYS_LARGEFILE

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

Making sure large file support is enabled across the tree even on 32-bit
systems.

Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 configure.ac                                  |  2 ++
 src/gallium/auxiliary/os/os_mman.h            | 13 +++++++++----
 src/gallium/winsys/radeon/drm/radeon_ctx.h    |  1 -
 src/gallium/winsys/radeon/drm/radeon_drm_bo.c |  1 -
 src/gallium/winsys/svga/drm/Makefile.am       |  2 +-
 5 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/configure.ac b/configure.ac
index aa7d1f2..9d2ddb4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,6 +57,8 @@ AC_CHECK_PROGS([PYTHON2], [python2 python])
 AC_PROG_SED
 AC_PROG_MKDIR_P
 
+AC_SYS_LARGEFILE
+
 LT_PREREQ([2.2])
 LT_INIT([disable-static])
 
diff --git a/src/gallium/auxiliary/os/os_mman.h b/src/gallium/auxiliary/os/os_mman.h
index b48eb053..19478d2 100644
--- a/src/gallium/auxiliary/os/os_mman.h
+++ b/src/gallium/auxiliary/os/os_mman.h
@@ -40,9 +40,6 @@
 #include "pipe/p_compiler.h"
 
 #if defined(PIPE_OS_UNIX)
-#  ifndef _FILE_OFFSET_BITS
-#    error _FILE_OFFSET_BITS must be defined to 64
-#  endif
 #  include <sys/mman.h>
 #else
 #  error Unsupported OS
@@ -77,7 +74,15 @@ static INLINE void *os_mmap(void *addr, size_t length, int prot, int flags, int
 #  define os_mmap(addr, length, prot, flags, fd, offset) mmap(addr, length, prot, flags, fd, offset)
 #endif
 
-#define os_munmap(addr, length) munmap(addr, length)
+static INLINE int os_munmap(void *addr, size_t length)
+{
+   /* Copied from configure code generated by AC_SYS_LARGEFILE */
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+   STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1);
+#undef LARGE_OFF_T
+
+   return munmap(addr, length);
+}
 
 
 #ifdef	__cplusplus
diff --git a/src/gallium/winsys/radeon/drm/radeon_ctx.h b/src/gallium/winsys/radeon/drm/radeon_ctx.h
index 5618b3a..d027016 100644
--- a/src/gallium/winsys/radeon/drm/radeon_ctx.h
+++ b/src/gallium/winsys/radeon/drm/radeon_ctx.h
@@ -26,7 +26,6 @@
 #ifndef RADEON_CTX_H
 #define RADEON_CTX_H
 
-#define _FILE_OFFSET_BITS 64
 #include <sys/mman.h>
 
 #include <errno.h>
diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_bo.c b/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
index 03b9b1d..5a5a2f1 100644
--- a/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
@@ -24,7 +24,6 @@
  * of the Software.
  */
 
-#define _FILE_OFFSET_BITS 64
 #include "radeon_drm_cs.h"
 
 #include "util/u_hash_table.h"
diff --git a/src/gallium/winsys/svga/drm/Makefile.am b/src/gallium/winsys/svga/drm/Makefile.am
index 953e166..3b95b47 100644
--- a/src/gallium/winsys/svga/drm/Makefile.am
+++ b/src/gallium/winsys/svga/drm/Makefile.am
@@ -30,7 +30,7 @@ AM_CFLAGS = \
 	$(LIBDRM_CFLAGS)
 
 #On some systems -std= must be added to CFLAGS to be the last -std=
-CFLAGS += -std=gnu99 -D_FILE_OFFSET_BITS=64
+CFLAGS += -std=gnu99
 
 noinst_LTLIBRARIES = libsvgadrm.la
 
-- 
2.1.0