When compiling the tests with multiple make jobs (in a rpmbuild/mock environment), linking with libxdgapp.la often fails: https://kojipkgs.fedoraproject.org//work/tasks/8373/11128373/build.log

/bin/sh ./libtool  --tag=CC   --mode=link gcc  -pthread -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  "-I./libglnx" -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -avoid-version -Bsymbolic-functions -export-symbols-regex "^glnx_" -no-undefined -export-dynamic  -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o libglnx.la  ./libglnx/libglnx_la-glnx-backports.lo ./libglnx/libglnx_la-glnx-local-alloc.lo ./libglnx/libglnx_la-glnx-errors.lo ./libglnx/libglnx_la-glnx-console.lo ./libglnx/libglnx_la-glnx-dirfd.lo ./libglnx/libglnx_la-glnx-fdio.lo ./libglnx/libglnx_la-glnx-lockfile.lo ./libglnx/libglnx_la-glnx-libcontainer.lo ./libglnx/libglnx_la-glnx-xattrs.lo ./libglnx/libglnx_la-glnx-shutil.lo  -lgio-2.0 -lgobject-2.0 -lglib-2.0  
libtool: link: ar cru .libs/libglnx.a ./libglnx/.libs/libglnx_la-glnx-backports.o ./libglnx/.libs/libglnx_la-glnx-local-alloc.o ./libglnx/.libs/libglnx_la-glnx-errors.o ./libglnx/.libs/libglnx_la-glnx-console.o ./libglnx/.libs/libglnx_la-glnx-dirfd.o ./libglnx/.libs/libglnx_la-glnx-fdio.o ./libglnx/.libs/libglnx_la-glnx-lockfile.o ./libglnx/.libs/libglnx_la-glnx-libcontainer.o ./libglnx/.libs/libglnx_la-glnx-xattrs.o ./libglnx/.libs/libglnx_la-glnx-shutil.o 
libtool: link: ranlib .libs/libglnx.a
libtool: link: ( cd ".libs" && rm -f "libglnx.la" && ln -s "../libglnx.la" "libglnx.la" )
/bin/sh ./libtool  --tag=CC   --mode=link gcc  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic  -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o xdg-app-helper lib/xdg_app_helper-xdg-app-helper.o -lseccomp  
/bin/sh ./libtool  --tag=CC   --mode=link gcc -pthread -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -DTEST_SERVICES=\""/builddir/build/BUILD/xdg-app-0.4.0/tests/services"\" -DDOC_PORTAL=\""/builddir/build/BUILD/xdg-app-0.4.0/xdg-document-portal"\" -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic  -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o test-doc-portal tests/test_doc_portal-test-doc-portal.o document-portal/test_doc_portal-xdp-dbus.o -lgio-2.0 -lgobject-2.0 -lglib-2.0  -lgsystem -lostree-1 -lgio-2.0 -lgobject-2.0 -lglib-2.0  libglnx.la libxdgapp.la  
/bin/sh ./libtool  --tag=CC   --mode=link gcc  -pthread -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -pthread -I/usr/include/libgsystem -I/usr/include/ostree-1 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -pthread -I/usr/include/libsoup-2.4 -I/usr/include/libxml2 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -I./dbus-proxy -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic  -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o libxdgapp.la  lib/libxdgapp_la-xdg-app-dir.lo lib/libxdgapp_la-xdg-app-run.lo lib/libxdgapp_la-xdg-app-error.lo lib/libxdgapp_la-xdg-app-utils.lo lib/libxdgapp_la-xdg-app-chain-input-stream.lo lib/gvdb/libxdgapp_la-gvdb-reader.lo lib/gvdb/libxdgapp_la-gvdb-builder.lo lib/libxdgapp_la-xdg-app-db.lo lib/libxdgapp_la-xdg-app-dbus.lo lib/libxdgapp_la-xdg-app-systemd-dbus.lo  libglnx.la -lgio-2.0 -lgobject-2.0 -lglib-2.0  -lgsystem -lostree-1 -lgio-2.0 -lgobject-2.0 -lglib-2.0  -lsoup-2.4 -lgio-2.0 -lgobject-2.0 -lglib-2.0  
libtool: link: gcc -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -Wl,-z -Wl,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o xdg-app-helper lib/xdg_app_helper-xdg-app-helper.o  -lseccomp
libtool: link: cannot find the library `libxdgapp.la' or unhandled argument `libxdgapp.la'
Makefile:1200: recipe for target 'test-doc-portal' failed
make[2]: *** [test-doc-portal] Error 1
make[2]: *** Waiting for unfinished jobs....
libtool: link: (cd .libs/libxdgapp.lax/libglnx.a && ar x "/builddir/build/BUILD/xdg-app-0.4.0/./.libs/libglnx.a")
libtool: link: ar cru .libs/libxdgapp.a lib/.libs/libxdgapp_la-xdg-app-dir.o lib/.libs/libxdgapp_la-xdg-app-run.o lib/.libs/libxdgapp_la-xdg-app-error.o lib/.libs/libxdgapp_la-xdg-app-utils.o lib/.libs/libxdgapp_la-xdg-app-chain-input-stream.o lib/gvdb/.libs/libxdgapp_la-gvdb-reader.o lib/gvdb/.libs/libxdgapp_la-gvdb-builder.o lib/.libs/libxdgapp_la-xdg-app-db.o lib/.libs/libxdgapp_la-xdg-app-dbus.o lib/.libs/libxdgapp_la-xdg-app-systemd-dbus.o   .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-backports.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-console.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-dirfd.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-errors.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-fdio.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-libcontainer.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-local-alloc.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-lockfile.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-shutil.o .libs/libxdgapp.lax/libglnx.a/libglnx_la-glnx-xattrs.o 
libtool: link: ranlib .libs/libxdgapp.a
libtool: link: rm -fr .libs/libxdgapp.lax
libtool: link: ( cd ".libs" && rm -f "libxdgapp.la" && ln -s "../libxdgapp.la" "libxdgapp.la" )
make[2]: Leaving directory '/builddir/build/BUILD/xdg-app-0.4.0'
Makefile:2153: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/builddir/build/BUILD/xdg-app-0.4.0'
Makefile:946: recipe for target 'all' failed
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.tBW2WN (%build)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.tBW2WN (%build)
Child return code was: 1
EXCEPTION: Command failed. See logs for output.
 # bash --login -c /usr/bin/rpmbuild -bb --target x86_64 --nodeps  /builddir/build/SPECS/xdg-app.spec 
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/mockbuild/trace_decorator.py", line 84, in trace
    result = func(*args, **kw)
  File "/usr/lib/python2.7/site-packages/mockbuild/util.py", line 493, in do
    raise exception.Error("Command failed. See logs for output.\n # %s" % (command,), child.returncode)
Error: Command failed. See logs for output.
 # bash --login -c /usr/bin/rpmbuild -bb --target x86_64 --nodeps  /builddir/build/SPECS/xdg-app.spec 
LEAVE do --> EXCEPTION RAISED