Package: libvolume-id-dev Version: 0.114-2 Severity: normal Tags: patch User: [EMAIL PROTECTED] Usertags: crossbuilt
When cross building packages depending on libvolume-id, pkgconfig fails
to parse the pc file generated by udev because the exec_prefix value is
not defined:
$ pkg-config /usr/arm-linux-gnu/lib/pkgconfig/libvolume_id.pc --libs
libvolume_id
Variable 'exec_prefix' not defined in
'/usr/arm-linux-gnu/lib/pkgconfig/libvolume_id.pc'
$ PKG_CONFIG_LIB_DIR=/usr/arm-linux-gnu/lib/pkgconfig/
pkg-config /usr/arm-linux-gnu/lib/pkgconfig/libvolume_id.pc --libs
libvolume_id
Variable 'exec_prefix' not defined in
'/usr/arm-linux-gnu/lib/pkgconfig/libvolume_id.pc'
The pc file is missing the first two lines:
prefix=
exec_prefix=
The values for the missing variables are not particularly important, but
pkg-config does require that the variables are specified so that it can
work out how to calculate dependencies during the cross build. Short
circuiting this step by hardcoding the value for libdir as /usr/lib
prevents pkg-config from converting libdir to be /usr/arm-linux-gnu/lib
etc. when cross compiling.
The attached patch adds dummy values to the pc file which allow
pkg-config to operate correctly:
$ PKG_CONFIG_LIB_DIR=/usr/arm-linux-gnu/lib/pkgconfig/ pkg-config
udev-0.114/extras/volume_id/lib/libvolume_id.pc --libs libvolume_id
-lvolume_id
Normal values for these two lines would be:
prefix=/usr
exec_prefix=${prefix}
libdir is then recalculated in terms of exec_prefix (libdir=
${exec_prefix}/lib) so that the correct location can be determined when
cross building: /usr/arm-linux-gnu/lib/
The patched pc file begins:
$ cat libvolume_id.pc
prefix=/usr
exec_prefix=${prefix}
libdir=/usr/lib
includedir=/usr/include
Thanks
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.22-2-amd64 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages libvolume-id-dev depends on:
ii libvolume-id0 0.114-2 libvolume_id shared library
libvolume-id-dev recommends no packages.
-- no debconf information
--
Neil Williams
=============
http://www.data-freedom.org/
http://www.nosoftwarepatents.com/
http://www.linux.codehelp.co.uk/
--- udev.old/extras/volume_id/lib/Makefile 2008-01-08 17:43:20.000000000 +0000
+++ udev-0.114/extras/volume_id/lib/Makefile 2008-01-08 18:08:37.000000000 +0000
@@ -91,6 +91,8 @@
libvolume_id.pc:
$(E) " GENPC " $@
+ $(Q) echo "prefix=${prefix}/usr" >> $@
+ $(Q) echo "exec_prefix=\$${prefix}" >> $@
$(Q) echo "libdir=${usrlibdir}" >> $@
$(Q) echo "includedir=${includedir}" >> $@
$(Q) echo "" >> $@
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