compilation de glib avec des chemins non standard

Je suis en train de compiler glib-2.32.1donc j'ai installé libffi-3.0.1 dans le chemin d'accès suivant:

~/localroot/lib/

et les fichiers d'en-tête sont:

~/localroot/lib/libffi-3.0.11/include/

Cependant, quand je configure:

~/tmp/build_alot/glib-2.32.1 $ ./configure --prefix=~/localroot

Je vois le message d'erreur suivant:

checking whether to cache iconv descriptors... no
checking for ZLIB... yes
checking for LIBFFI... no
configure: error: Package requirements (libffi >= 3.0.0) were not met:

No package 'libffi' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables LIBFFI_CFLAGS
and LIBFFI_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

Quelles sont les valeurs correctes que j'ai besoin de pour LIBFFI_LIBS et LIBFFI_CFLAGS pour compiler correctement glib?

tout petit peu d'infos supplémentaires:

Lorsque j'ai compilé libffi j'ai eu la suivante info utile:

Les bibliothèques ont été installés dans:
/home/nahum/localroot/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
    ----------------------------------------------------------------------
test -z "/home/user/localroot/share/info" || /bin/mkdir -p "/home/user/localroot/share/info"
 /usr/bin/install -c -m 644 ../doc/libffi.info '/home/nahum/localroot/share/info'
 install-info --info-dir='/home/user/localroot/share/info' '/home/user/localroot/share/info/libffi.info'
test -z "/home/user/localroot/lib/pkgconfig" || /bin/mkdir -p "/home/user/localroot/lib/pkgconfig"
 /usr/bin/install -c -m 644 libffi.pc '/home/user/localroot/lib/pkgconfig'
make[3]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'
make[2]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'
make[1]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'

Réglage PKG_CONFIG_PATH à /home/user/localroot/lib/pkgconfig n'est toujours pas le succès.

source d'informationauteur Oz123