antoine@poch ~ $ cat /var/tmp/portage/xfce-base/xfdesktop-4.4.1-r1/temp/build.lo
>>> Unpacking source...
>>> Unpacking xfdesktop-4.4.1.tar.bz2 to /var/tmp/portage/xfce-base/xfdesktop-4.
 * Applying xfdesktop-4.4.1-translation.patch ...                         [ ok ]
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/xfce-base/xfdesktop-4.4.1-r1/work/xfdes
 * econf: updating xfdesktop-4.4.1/config.guess with /usr/share/gnuconfig/config
 * econf: updating xfdesktop-4.4.1/config.sub with /usr/share/gnuconfig/config.s
./configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --inf
nable-xsltproc --enable-thunarx --enable-file-icons --enable-desktop-icons --ena
able-debug --build=i686-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether to enable maintainer-specific portions of Makefiles... no
checking for style of include used by make... GNU
checking for i686-pc-linux-gnu-gcc... i686-pc-linux-gnu-gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether i686-pc-linux-gnu-gcc accepts -g... yes
checking for i686-pc-linux-gnu-gcc option to accept ANSI C... none needed
checking dependency style of i686-pc-linux-gnu-gcc... gcc3
checking how to run the C preprocessor... i686-pc-linux-gnu-gcc -E
checking for egrep... grep -E
checking for AIX... no
checking for strerror in -lcposix... no
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
chchecking for i686-pc-linux-gnu-gcc... (cached) i686-pc-linux-gnu-gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether i686-pc-linux-gnu-gcc accepts -g... (cached) yes
checking for i686-pc-linux-gnu-gcc option to accept ANSI C... (cached) none need
checking dependency style of i686-pc-linux-gnu-gcc... (cached) gcc3
checking for a BSD-compatible install... /usr/bin/install -c
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for a sed that does not truncate output... /bin/sed
checking for ld used by i686-pc-linux-gnu-gcc... /usr/i686-pc-linux-gnu/bin/ld
checking if the linker (/usr/i686-pc-linux-gnu/bin/ld) is GNU ld... yes
checking for /usr/i686-pc-linux-gnu/bin/ld option to reload object files... -r
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
checking how to recognise dependent libraries... pass_all
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
checking for dlfcn.h... yes
checking for i686-pc-linux-gnu-g++... i686-pc-linux-gnu-g++
checking whether we are using the GNU C++ compiler... yes
checking whether i686-pc-linux-gnu-g++ accepts -g... yes
checking dependency style of i686-pc-linux-gnu-g++... gcc3
checking how to run the C++ preprocessor... i686-pc-linux-gnu-g++ -E
checking for i686-pc-linux-gnu-g77... no
checking for i686-pc-linux-gnu-f77... no
checking for i686-pc-linux-gnu-xlf... no
checking for i686-pc-linux-gnu-frt... no
checking for i686-pc-linux-gnu-pgf77... no
checking for i686-pc-linux-gnu-fort77... no
checking for i686-pc-linux-gnu-fl32... no
checking for i686-pc-linux-gnu-af77... no
checking for i686-pc-linux-gnu-f90... no
checking for i686-pc-linux-gnu-xlf90... no
checking for i686-pc-linux-gnu-pgf90... no
checking for i686-pc-linux-gnu-epcf90... no
checking for i686-pc-linux-gnu-f95... no
checking for i686-pc-linux-gnu-fort... no
checking for i686-pc-linux-gnu-xlf95... no
checking for i686-pc-linux-gnu-ifc... no
checking for i686-pc-linux-gnu-efc... no
checking for i686-pc-linux-gnu-pgf95... no
checking for i686-pc-linux-gnu-lf95... no
checking for minix/config.h... no
checking for i686-pc-linux-gnu-gfortran... i686-pc-linux-gnu-gfortran
checking whether we are using the GNU Fortran 77 compiler... yes
checking whether i686-pc-linux-gnu-gfortran accepts -g... yes
checking the maximum length of command line arguments... 32768
checking command to parse /usr/bin/nm -B output from i686-pc-linux-gnu-gcc objec
checking for objdir... .libs
checking for i686-pc-linux-gnu-ar... i686-pc-linux-gnu-ar
checking for i686-pc-linux-gnu-ranlib... i686-pc-linux-gnu-ranlib
checking for i686-pc-linux-gnu-strip... i686-pc-linux-gnu-strip
checking if i686-pc-linux-gnu-gcc supports -fno-rtti -fno-exceptions... no
checking for i686-pc-linux-gnu-gcc option to produce PIC... -fPIC
checking if i686-pc-linux-gnu-gcc PIC flag -fPIC works... yes
checking if i686-pc-linux-gnu-gcc static flag -static works... yes
checking if i686-pc-linux-gnu-gcc supports -c -o file.o... yes
checking whether the i686-pc-linux-gnu-gcc linker (/usr/i686-pc-linux-gnu/bin/ld
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
configure: creating libtool
appending configuration tag "CXX" to libtool
checking for ld used by i686-pc-linux-gnu-g++... /usr/i686-pc-linux-gnu/bin/ld
checking if the linker (/usr/i686-pc-linux-gnu/bin/ld) is GNU ld... yes
checking whether the i686-pc-linux-gnu-g++ linker (/usr/i686-pc-linux-gnu/bin/ld
checking for i686-pc-linux-gnu-g++ option to produce PIC... -fPIC
checking if i686-pc-linux-gnu-g++ PIC flag -fPIC works... yes
checking if i686-pc-linux-gnu-g++ static flag -static works... yes
checking if i686-pc-linux-gnu-g++ supports -c -o file.o... yes
checking whether the i686-pc-linux-gnu-g++ linker (/usr/i686-pc-linux-gnu/bin/ld
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
appending configuration tag "F77" to libtool
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for i686-pc-linux-gnu-gfortran option to produce PIC... -fPIC
checking if i686-pc-linux-gnu-gfortran PIC flag -fPIC works... yes
checking if i686-pc-linux-gnu-gfortran static flag -static works... yes
checking if i686-pc-linux-gnu-gfortran supports -c -o file.o... yes
checking whether the i686-pc-linux-gnu-gfortran linker (/usr/i686-pc-linux-gnu/b
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking for intltool >= 0.31... 0.35.0 found
checking for perl... /usr/bin/perl
checking for iconv... /usr/bin/iconv
checking for msgfmt... /usr/bin/msgfmt
checking for msgmerge... /usr/bin/msgmerge
checking for xgettext... /usr/bin/xgettext
checking for ANSI C header files... (cached) yes
checking errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking math.h usability... yes
checking math.h presence... yes
checking for math.h... yes
checking signal.h usability... yes
checking signal.h presence... yes
checking for signal.h... yes
checking stddef.h usability... yes
checking stddef.h presence... yes
checking for stddef.h... yes
checking for string.h... (cached) yes
checking for sys/stat.h... (cached) yes
checking for sys/types.h... (cached) yes
checking sys/wait.h usability... yes
checking sys/wait.h presence... yes
checking for sys/wait.h... yes
checking time.h usability... yes
checking time.h presence... yes
checking for time.h... yes
checking for unistd.h... (cached) yes
checking for mmap... yes
checking for sigaction... yes
checking for srandom... yes
checking locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking for LC_MESSAGES... yes
checking libintl.h usability... yes
checking libintl.h presence... yes
checking for libintl.h... yes
checking for ngettext in libc... yes
checking for dgettext in libc... yes
checking for bind_textdomain_codeset... yes
checking for msgfmt... /usr/bin/msgfmt
checking for dcgettext... yes
checking for gmsgfmt... /usr/bin/gmsgfmt
checking for xgettext... /usr/bin/xgettext
checking for catalogs to be installed...  fr
checking for bind_textdomain_codeset... (cached) yes
checking for locales directory... /usr/share/locale
checking for additional xgettext flags... --keyword=Q_ --from-code=UTF-8
checking for X... libraries , headers 
checking for gethostbyname... yes
checking for connect... yes
checking for remove... yes
checking for shmat... yes
checking for IceConnectionNumber in -lICE... yes
checking for main in -lX11... yes
checking for SmcSaveYourselfDone in -lSM... yes
checking for pkg-config... /usr/bin/pkg-config
checking for pkg-config >= 0.9.0... 0.21
checking for gmodule-2.0 >= 2.6.0... 2.12.9
checking GMODULE_CFLAGS... -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include  
checking GMODULE_LIBS... -Wl,--export-dynamic -lgmodule-2.0 -ldl -lglib-2.0  
checking for gobject-2.0 >= 2.6.0... 2.12.9
checking GOBJECT_CFLAGS... -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include  
checking GOBJECT_LIBS... -lgobject-2.0 -lglib-2.0  
checking for gtk+-2.0 >= 2.6.0... 2.10.9
checking GTK_CFLAGS... -DPNG_NO_MMX_CODE -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2
nclude/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/incl
checking GTK_LIBS... -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm 
checking for libxfce4util-1.0 >= 4.4.1... found, but 4.4.0
*** The required package libxfce4util-1.0 was found on your system,
*** but the installed version (4.4.0) is too old.
*** Please upgrade libxfce4util-1.0 to atleast version 4.4.1, or adjust
*** the PKG_CONFIG_PATH environment variable if you installed
*** the new version of the package in a nonstandard prefix so
***!!! Please attach the following file when filing a report to bugs.gentoo.org:
!!! /var/tmp/portage/xfce-base/xfdesktop-4.4.1-r1/work/xfdesktop-4.4.1/config.lo

!!! ERROR: xfce-base/xfdesktop-4.4.1-r1 failed.
Call stack:
  ebuild.sh, line 1615:   Called dyn_compile
  ebuild.sh, line 972:   Called qa_call 'src_compile'
  ebuild.sh, line 44:   Called src_compile
  ebuild.sh, line 1305:   Called xfce44_src_compile
  xfce44.eclass, line 134:   Called econf '--enable-xsltproc' '--enable-thunarx'
--enable-xsltproc' '--enable-xsltproc' '--enable-gtk-doc' '--disable-debug'
  ebuild.sh, line 578:   Called die

!!! econf failed
!!! If you need support, post the topmost build error, and the call stack if rel
!!! A complete build log is located at '/var/tmp/portage/xfce-base/xfdesktop-4.4
 pkg-config is able to find it.