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btrfs-progs: autogen: Make build success in CentOS 6 and 7 

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:
f95ab6f939

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Zhao Lei 2016-05-13 11:44:52 +08:00 committed by David Sterba
parent 4bf9da999e
commit f34d10bbe9
1 changed files with 2 additions and 1 deletions
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3
configure.ac
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@ -124,7 +124,8 @@ 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], [