fstests: update autoconf rules to define _GNU_SOURCE where needed

Commit Message

Eryu Guan Feb. 23, 2016, 4:19 a.m. UTC

Starting from xfsprogs commit cb898f157f84 ("linux.h: Use off64_t
instead of loff_t") in v4.5-rc1, fstests failed to build because of
configure error:

    checking xfs/xfs.h usability... no
    checking xfs/xfs.h presence... yes
    configure: WARNING: xfs/xfs.h: present but cannot be compiled
    configure: WARNING: xfs/xfs.h:     check for missing prerequisite headers?
    configure: WARNING: xfs/xfs.h: see the Autoconf documentation
    configure: WARNING: xfs/xfs.h:     section "Present But Cannot Be Compiled"
    configure: WARNING: xfs/xfs.h: proceeding with the compiler's result
    checking for xfs/xfs.h... no

    FATAL ERROR: cannot find a valid <xfs/xfs.h> header file.
    Run "make install-qa" from the xfsprogs source.

and that's because off64_t is not defined without _GNU_SOURCE being set.

Fix it by updating the autoconf rules adding _GNU_SOURCE define for the
following checks:

xfs.h libxfs.h xfs_log_format.h xlog_assign_lsn xqm.h xfsctl

Suggested-by: Dave Chinner <[e-mail]>
Signed-off-by: Eryu Guan <[e-mail]>
---
 configure.ac          |  4 +++-
 m4/package_xfslibs.m4 | 19 ++++++++++++-------
 2 files changed, 15 insertions(+), 8 deletions(-)

Patch

diff --git a/configure.ac b/configure.ac
index d038f95..fa48d2f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,7 +34,9 @@  AC_HEADER_STDC
 			cifs/ioctl.h		\
     ])
 
-AC_CHECK_HEADERS([xfs/xfs_log_format.h],,,[#include <xfs/libxfs.h>])
+AC_CHECK_HEADERS([xfs/xfs_log_format.h],,,[
+#define _GNU_SOURCE
+#include <xfs/libxfs.h>])
 
 AC_PACKAGE_NEED_UUIDCOMPARE
 
diff --git a/m4/package_xfslibs.m4 b/m4/package_xfslibs.m4
index 78a3dc4..6bf4704 100644
--- a/m4/package_xfslibs.m4
+++ b/m4/package_xfslibs.m4
@@ -1,27 +1,29 @@ 
 AC_DEFUN([AC_PACKAGE_NEED_XFS_XFS_H],
-  [ AC_CHECK_HEADERS([xfs/xfs.h])
+  [ AC_CHECK_HEADERS([xfs/xfs.h],,,[#define _GNU_SOURCE])
     if test "$ac_cv_header_xfs_xfs_h" != "yes"; then
         echo
         echo 'FATAL ERROR: cannot find a valid <xfs/xfs.h> header file.'
-        echo 'Run "make install-qa" from the xfsprogs source.'
+        echo 'Run "make install-dev" from the xfsprogs source.'
         exit 1
     fi
   ])
 
 AC_DEFUN([AC_PACKAGE_WANT_LIBXFS_H],
-  [ AC_CHECK_HEADERS([xfs/libxfs.h], [ have_libxfs=true ], [ have_libxfs=false ])
+  [ AC_CHECK_HEADERS([xfs/libxfs.h], [ have_libxfs=true ],
+    [ have_libxfs=false ], [#define _GNU_SOURCE])
     AC_SUBST(have_libxfs)
   ])
 
 AC_DEFUN([AC_PACKAGE_WANT_XLOG_ASSIGN_LSN],
   [ AC_CHECK_DECL(xlog_assign_lsn,
-      [ have_xlog_assign_lsn=true ], [ have_xlog_assign_lsn=false ],
-      [[#include <xfs/libxfs.h>]])
+      [ have_xlog_assign_lsn=true ], [ have_xlog_assign_lsn=false ], [[
+#define _GNU_SOURCE
+#include <xfs/libxfs.h>]])
     AC_SUBST(have_xlog_assign_lsn)
   ])
 
 AC_DEFUN([AC_PACKAGE_NEED_XFS_XQM_H],
-  [ AC_CHECK_HEADERS([xfs/xqm.h])
+  [ AC_CHECK_HEADERS([xfs/xqm.h],,,[#define _GNU_SOURCE])
     if test "$ac_cv_header_xfs_xqm_h" != "yes"; then
         echo
         echo 'FATAL ERROR: cannot find a valid <xfs/xqm.h> header file.'
@@ -99,7 +101,10 @@  AC_DEFUN([AC_PACKAGE_NEED_IRIX_LIBHANDLE],
 
 AC_DEFUN([AC_PACKAGE_NEED_XFSCTL_MACRO],
   [ AC_MSG_CHECKING([xfsctl from xfs/xfs.h])
-    AC_TRY_LINK([#include <xfs/xfs.h>], [ int x = xfsctl(0, 0, 0, 0); ],
+    AC_TRY_LINK([
+#define _GNU_SOURCE
+#include <xfs/xfs.h> ],
+      [ int x = xfsctl(0, 0, 0, 0); ],
       [ echo ok ],
       [ echo
         echo 'FATAL ERROR: cannot find required macros in the XFS headers.'