[Buildroot] [PATCH] yajl: disable parallel build

["Jörg Krause" <joerg.krause@embedded.rocks>]

Dear Thomas,

On Do, 2016-03-31 at 21:14 +0200, Thomas Petazzoni wrote:
> Hello,
> 
> On Thu, 31 Mar 2016 21:01:01 +0200, J?rg Krause wrote:
> > 
> > The yajl build system contains a race condition, which gets
> > triggered by
> > high BR2_JLEVEL settings - It tries to link the executable gen-
> > extra-close
> > against libyajl before it is created:
> > 
> > [ 21%] Linking C executable gen-extra-close
> > [ 26%] Building C object src/CMakeFiles/yajl_s.dir/yajl_buf.c.o
> > /home/test/autobuild/instance-3/output/host/opt/ext-toolchain/bfin-
> > uclinux/bfin-uclinux/bin/ld.real: cannot find -lyajl
> > 
> > Fix it by disabling parallel build.
> > 
> > Fixes:
> > http://autobuild.buildroot.net/results/a9b/a9b5209377acb51e69f376e0
> > c008ee71fe00397a/
> > http://autobuild.buildroot.net/results/55f/55fe22463d49addb42b635d1
> > 0be5176522f4a561/
> > http://autobuild.buildroot.net/results/808/808acca0cfed93465845c2aa
> > 055a7a4fc56a8a17/
> > http://autobuild.buildroot.net/results/b92/b92a9c84b71a8a2d022d3072
> > 45ca6be36a000e6c/
> > http://autobuild.buildroot.net/results/55d/55df698ab53f7d94235166e8
> > 576eb681ed68668e/
> > .. and more.
> > 
> > Signed-off-by: J?rg Krause <joerg.krause@embedded.rocks>
> yajl is using a reasonable build system, so there should be a
> reasonable way of getting parallel build to work.
> 
> Can you try the following patch:
> 
> diff --git a/test/api/CMakeLists.txt b/test/api/CMakeLists.txt
> index cd65a54..f7b6be1 100644
> --- a/test/api/CMakeLists.txt
> +++ b/test/api/CMakeLists.txt
> @@ -22,4 +22,5 @@ FOREACH (test ${TESTS})
> ???GET_FILENAME_COMPONENT(testProg ${test} NAME_WE)
> ???ADD_EXECUTABLE(${testProg} ${test})
> ???TARGET_LINK_LIBRARIES(${testProg} yajl)
> +??ADD_DEPENDENCIES(${testProg} yajl)
> ?ENDFOREACH()
> 
> And see if it helps ?
> 
> Note: this is only fixing the dependency of the gen-extra-close test
> program against the yajl library. Probably other ADD_DEPENDENCIES()
> invocations need to be added.

This was my first try and it did not work. However, after having a
closer look the dependency is yajl_s.

I'll sent a v2 for this. Many thanks for looking into this!

J?rg