btrfs-progs build failed in CentOS 6 and 7:
#./autogen.sh
...
configure.ac:131: error: possibly undefined macro: PKG_CHECK_VAR
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
...
Seems PKG_CHECK_VAR is new in pkgconfig 0.28 (24-Jan-2013):
http://redmine.audacious-media-player.org/boards/1/topics/736
And the max available version for CentOS 7 in yum-repo and
rpmfind.net is: pkgconfig-0.27.1-4.el7
http://rpmfind.net/linux/rpm2html/search.php?query=pkgconfig&submit=Search+...&system=centos&arch=
I updated my pkgconfig to 0.30, but still failed at above error.
(Maybe it is my setting problem)
To make user in centos 6 and 7 building btrfs-progs without
more changes, we can avoid using PKG_CHECK_VAR in following
way found in:
https://github.com/audacious-media-player/audacious-plugins/commit/f95ab6f939ecf0d9232b3165f9241d2ea9676b9e
Changelog v1->v2:
1: Add AC_SUBST(UDEVDIR)
Suggested by: Jeff Mahoney <je...@suse.com>
Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com>
---
configure.ac | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 4688bc7..c79472c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -128,7 +128,8 @@ PKG_STATIC(UUID_LIBS_STATIC, [uuid])
PKG_CHECK_MODULES(ZLIB, [zlib])
PKG_STATIC(ZLIB_LIBS_STATIC, [zlib])
-PKG_CHECK_VAR([UDEVDIR], [udev], [udevdir])
+UDEVDIR="$(pkg-config udev --variable=udevdir)"
+AC_SUBST(UDEVDIR)
dnl lzo library does not provide pkg-config, let use classic way
AC_CHECK_LIB([lzo2], [lzo_version], [
--
1.8.5.1
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