Re: [dpdk-dev] [PATCH 3/4] devtools/test-meson-builds: add testing of pkg-config file

[Luca Boccassi <bluca@debian.org>]

On Wed, 2019-04-24 at 13:31 +0100, Bruce Richardson wrote:
> On Wed, Apr 24, 2019 at 12:02:24PM +0100, Luca Boccassi wrote:
> > On Wed, 2019-04-24 at 11:41 +0100, Bruce Richardson wrote:
> > > On Wed, Apr 24, 2019 at 10:22:04AM +0100, Luca Boccassi wrote:
> > > > On Tue, 2019-04-23 at 23:06 +0100, Bruce Richardson wrote:
> > > > > The pkg-config file generated as part of the build of DPDK
> > > > > should
> > > > > allow
> > > > > applications to be built with an installed DPDK. We can test
> > > > > this
> > > > > as
> > > > > part of the build by doing an install of DPDK to a temporary
> > > > > directory
> > > > > within the build folder, and by then compiling up a few
> > > > > sample
> > > > > apps
> > > > > using make working off that directory.
> > > > > 
> > > > > Signed-off-by: Bruce Richardson < 
> > > > > bruce.richardson@intel.com
> > > > > 
> > > > > 
> > > > > 
> > > > > --- devtools/test-meson-builds.sh | 17 +++++++++++++++++ 1
> > > > > file
> > > > > changed, 17 insertions(+)
> > > > > 
> > > > > diff --git a/devtools/test-meson-builds.sh b/devtools/test-
> > > > > meson-
> > > > > builds.sh index 630a1a6fe..dfba2a782 100755 ---
> > > > > a/devtools/test-meson-builds.sh +++ b/devtools/test-meson-
> > > > > builds.sh @@
> > > > > -90,3 +90,20 @@ if command -v $c >/dev/null 2>&1 ; then
> > > > > $use_shared
> > > > > --cross-file $f done fi + +############## +# Test
> > > > > installation of
> > > > > the
> > > > > x86-default target, to be used for checking +# the sample
> > > > > apps
> > > > > build
> > > > > using the pkg-config file for cflags and libs
> > > > > +###############
> > > > > +build_path=build-x86-default
> > > > > +DESTDIR=`pwd`/$build_path/install-
> > > > > root ;
> > > > > export DESTDIR
> > > > > +PKG_CONFIG_PATH=$DESTDIR/usr/local/lib64/pkgconfig ;
> > > > > export PKG_CONFIG_PATH +$ninja_cmd -C $build_path install +
> > > > > +#
> > > > > rather
> > > > > than hacking our environment, just edit the .pc file prefix
> > > > > value
> > > > > +sed
> > > > > -i "s|prefix=|prefix=$DESTDIR|" $PKG_CONFIG_PATH/libdpdk.pc
> > > > 
> > > > What about just using meson's prefix option instead? Which is
> > > > how
> > > > it
> > > > would be used in a real use case
> > > > 
> > > 
> > > I don't think that would fully work, as my understanding is that
> > > the
> > > prefix
> > > option would apply only to the /usr/local parts, but not to the
> > > kernel
> > > modules which would still try and install in /lib/.
> > > 
> > > /Bruce
> > 
> > What about doing a meson configure -Denable_kmods=false before the
> > ninja install? The modules are not needed for that test anyway,
> > right?
> > Alternatively, the kernel src dir could be symlinked in the build
> > path,
> > and the kernel_dir option could be used
> > 
> > I'm just worried that the test should be as "realistic" as
> > possible, to
> > avoid missing something
> > 
> 
> Yes, I did think of that too, but it does mean doing another
> configuration
> run in meson, and possibly a rebuild too if the rte_build_config.h
> file
> changes. Therefore I decided to use DESTDIR for the sake of speed
> here. I
> assumed there would be a pkg-config variable to adjust the output
> paths
> based on a sysroot, but couldn't find a suitable one.
> 
> In any case, I'll see about changing things as you suggest in V2 -
> correctness is more important that speed here.
> 
> /Bruce

There actually is a pkg-config binary option, I just tried and it works
(it seems to be disabled by default on Debian and derivatives): --
define-prefix

-- 
Kind regards,
Luca Boccassi