'cd' in debian/rules
Christopher Halse Rogers
chalserogers at gmail.com
Mon Mar 31 03:43:32 BST 2008
On 3/31/08, Matt G. <mattismyname at gmail.com> wrote:
> Hello all,
>
...
>
> I'm up to the point of running debuild but have run into trouble. The
> normal build sequence for this library is "./configure; cd src; make".
> So, I've edited the debian/rules file that was autogenerated by
> dh_make to add the "cd src" command to the build-stamp target right
> before the line containing $(MAKE). I also added a 'cd src' command
> for the clean target. However, the cd command does not seem to get
> executed for build-stamp: or clean:.
>
I replied in #ubuntu-motu, but for posterity's sake...
This is because each tab-indented line of a Makefile is interpreted in
a separate shell. So make encounters "\t cd src", promptly spawns a
shell and runs "cd src" in that shell. The current working directory
of _that shell_ is now ./src, but it has successfully completed that
command, and so exits. Make then goes on to run the next line
"\t$(MAKE)" in a new shell, which has inherited the Makefile's current
working directory, and so fails.
You'll notice in your build output:
> matt at Aluminumy:~/Packaging/libgfx/libgfx-debhelper-1.1.0$ debuild
> fakeroot debian/rules clean
> dh_testdir
> dh_testroot
> rm -f build-stamp
> # Add here commands to clean up after the build process.
> # -/usr/bin/make distclean
> cd src
^^^^^^^^^
> /usr/bin/make clean
> make[1]: Entering directory
> `/home/matt/Packaging/libgfx/libgfx-debhelper-1.1.0'
> make[1]: *** No rule to make target `clean'. Stop.
> make[1]: Leaving directory `/home/matt/Packaging/libgfx/libgfx-debhelper-1.1.0'
> make: [clean] Error 2 (ignored)
> cd ..
^^^^^^^^
> rm -f config.sub config.guess
> dh_clean
> dpkg-source -b libgfx-debhelper-1.1.0
> dpkg-source: warning: source directory './libgfx-debhelper-1.1.0' is
> not <sourcepackage>-<upstreamversion> 'libgfx-1.1.0'
> dpkg-source: warning: .orig directory name libgfx-debhelper-1.1.0.orig
> is not <package>-<upstreamversion> (wanted libgfx-1.1.0.orig)
> dpkg-source: building libgfx using existing libgfx_1.1.0.orig.tar.gz
> dpkg-source: building libgfx in libgfx_1.1.0-0ubuntu0.diff.gz
> dpkg-source: warning: executable mode 0755 of 'config.status' will not
> be represented in diff
> dpkg-source: building libgfx in libgfx_1.1.0-0ubuntu0.dsc
> debian/rules build
> dh_testdir
> # Add here commands to compile the package.
> cd src
^^^^^^^^
> /usr/bin/make
> make[1]: Entering directory
> `/home/matt/Packaging/libgfx/libgfx-debhelper-1.1.0'
> make[1]: *** No targets specified and no makefile found. Stop.
> make[1]: Leaving directory `/home/matt/Packaging/libgfx/libgfx-debhelper-1.1.0'
> make: *** [build-stamp] Error 2
> debuild: fatal error at line 1247:
> debian/rules build failed
>
that your cd commands get run.
Probably what you actually want to do is pass -C src/ to make (so
$(MAKE) -C src), which tells it to start in the src/ directory. Or
ask the upstream developers why the build system is strange. :)
Makefiles can be a bit strange when you start. It's very important to
remember that they are _not_ shell scripts!
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