# emerge -v xaos
Calculating dependencies... done!

>>> Emerging (1 of 1) x11-misc/xaos-3.1 to /
>>> Downloading 'ftp://ftp.sh.cvut.cz/MIRRORS/gentoo/gentoo/distfiles/XaoS-3.1.tar.gz'
--10:13:44--  ftp://ftp.sh.cvut.cz/MIRRORS/gentoo/gentoo/distfiles/XaoS-3.1.tar.gz
           => `/usr/portage/distfiles/XaoS-3.1.tar.gz'
Resolving ftp.sh.cvut.cz... 147.32.127.222
Connecting to ftp.sh.cvut.cz|147.32.127.222|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD /MIRRORS/gentoo/gentoo/distfiles ... done.
==> PASV ... done.    ==> RETR XaoS-3.1.tar.gz ... done.
Length: 1,182,143 (1.1M) (unauthoritative)

100%[====================================>] 1,182,143    214.02K/s    ETA 00:00

10:13:50 (209.40 KB/s) - `/usr/portage/distfiles/XaoS-3.1.tar.gz' saved [1182143]

 * checking ebuild checksums ;-) ...                                      [ ok ] * checking auxfile checksums ;-) ...                                     [ ok ] * checking miscfile checksums ;-) ...                                    [ ok ] * checking XaoS-3.1.tar.gz ;-) ...                                       [ ok ]>>> Unpacking source...
>>> Unpacking XaoS-3.1.tar.gz to /var/tmp/portage/xaos-3.1/work
 * Applying gcc3.4.patch ...                                              [ ok ]>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/xaos-3.1/work/XaoS-3.1 ...
checking build system type... i686-pc-linux
checking host system type... i686-pc-linux
checking target system type... i686-pc-linux
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for executable suffix...
checking for object suffix... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking how to run the C preprocessor... gcc -E
checking whether gcc needs -traditional... no
checking whether make sets ${MAKE}... yes
checking for ranlib... ranlib
checking for strerror in -lcposix... no
checking for ANSI C header files... yes
checking for gcc option to accept ANSI C... none needed
checking for an ANSI C-conforming const... yes
checking for inline... inline
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 for off_t... yes
checking for size_t... yes
checking for working alloca.h... yes
checking for alloca... yes
checking for stdlib.h... (cached) yes
checking for unistd.h... (cached) yes
checking for getpagesize... yes
checking for working mmap... yes
checking whether we are using the GNU C Library 2.1 or newer... yes
checking for argz.h... yes
checking for limits.h... yes
checking for locale.h... yes
checking for nl_types.h... yes
checking for malloc.h... yes
checking for stddef.h... yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for unistd.h... (cached) yes
checking for sys/param.h... yes
checking for feof_unlocked... yes
checking for fgets_unlocked... yes
checking for getcwd... yes
checking for getegid... yes
checking for geteuid... yes
checking for getgid... yes
checking for getuid... yes
checking for mempcpy... yes
checking for munmap... yes
checking for putenv... yes
checking for setenv... yes
checking for setlocale... yes
checking for stpcpy... yes
checking for strchr... yes
checking for strcasecmp... yes
checking for strdup... yes
checking for strtoul... yes
checking for tsearch... yes
checking for __argz_count... yes
checking for __argz_stringify... yes
checking for __argz_next... yes
checking for iconv... yes
checking for iconv declaration...
         extern size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
checking for nl_langinfo and CODESET... yes
checking for LC_MESSAGES... yes
checking whether NLS is requested... yes
checking whether included gettext is requested... no
checking for libintl.h... yes
checking for GNU gettext in libc... yes
checking for dcgettext... yes
checking for msgfmt... /usr/bin/msgfmt
checking for gmsgfmt... /usr/bin/gmsgfmt
checking for xgettext... /usr/bin/xgettext
checking for bison... bison
checking version of bison... 2.1, ok
checking for catalogs to be installed...  cs
checking whether gcc accepts -mpentiumpro... no
checking whether gcc accepts -m686... no
checking whether make sets ${MAKE}... (cached) yes
checking for ld used by 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 dependant libraries... pass_all
checking command to parse /usr/bin/nm -B output... ok
checking for dlfcn.h... yes
checking for ranlib... (cached) ranlib
checking for strip... strip
checking for objdir... .libs
checking for gcc option to produce PIC... -fPIC
checking if gcc PIC flag -fPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.lo... yes
checking if gcc supports -fno-rtti -fno-exceptions... yes
checking whether the linker (/usr/i686-pc-linux-gnu/bin/ld) supports shared libraries... yes
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking dynamic linker characteristics... GNU/Linux ld.so
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking whether -lc should be explicitly linked in... no
creating libtool
checking for a BSD compatible install... /bin/install -c
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 be_app in -lbe... no
configure: checking "location of curses"...
checking for Gpm_Repeat in -lgpm... yes
checking for SLsmg_init_smg in -lslang... no
checking for initscr in -lncurses... yes
Found ncurses on /usr/include/ncurses.h
checking for OS.h... no
checking for alloca.h... yes
checking for ddraw.h... no
checking for errno.h... yes
checking for fcntl.h... yes
checking for float.h... yes
checking for libintl.h... (cached) yes
checking for limits.h... (cached) yes
checking for locale.h... (cached) yes
checking for malloc.h... (cached) yes
checking for stddef.h... (cached) yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for sys/time.h... yes
checking for sys/timeb.h... yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... (cached) yes
checking for inline... (cached) inline
checking for long double... yes
checking whether time.h and sys/time.h may both be included... yes
checking for dirent.h that defines DIR... yes
checking for opendir in -ldir... no
checking for sys/wait.h that is POSIX.1 compatible... yes
checking return type of signal handlers... void
checking for pid_t... yes
checking for size_t... (cached) yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for short... yes
checking size of short... 2
checking for int... yes
checking size of int... 4
checking for long... yes
checking size of long... 4
checking for pow in -lm... yes
checking for inflate in -lz... yes
checking for png_create_info_struct in -lpng... yes
checking for working alloca.h... (cached) yes
checking for alloca... (cached) yes
checking return type of signal handlers... (cached) void
checking for ftime... yes
checking for getcwd... (cached) yes
checking for gettimeofday... yes
checking for memchr... yes
checking for memmove... yes
checking for memset... yes
checking for pow... yes
checking for select... yes
checking for setlocale... (cached) yes
checking for sqrt... yes
checking for strdup... (cached) yes
checking for strerror... yes
checking for strstr... yes
checking for sleep... yes
checking for setitimer... yes
checking for ftime... (cached) yes
checking for finite... yes
checking for fabsl... yes
checking for _fabsl... no
checking for __fabsl... no
checking for sys/ipc.h... yes
checking for sys/shm.h... yes
checking X11/extensions/XShm.h... no
checking for XShmAttach in -lXext... yes
checking for XF86DGAQueryVersion in -lXxf86dga... yes
checking for XF86VidModeGetModeLine in -lXxf86vm... yes
------------------------------------------------------------
Available drivers:
   X11
   DGA
configure: creating ./config.status
config.status: creating src/i18n/Makefile.in
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating src/i18n/Makefile
config.status: creating src/engine/Makefile
config.status: creating src/util/Makefile
config.status: creating src/ui/Makefile
config.status: creating src/filter/Makefile
config.status: creating src/ui-hlp/Makefile
config.status: creating src/ui/ui-drv/aa/Makefile
config.status: creating src/ui/ui-drv/ggi/Makefile
config.status: creating src/ui/ui-drv/svga/Makefile
config.status: creating src/ui/ui-drv/x11/Makefile
config.status: creating src/ui/ui-drv/dga/Makefile
config.status: creating src/ui/ui-drv/win32/Makefile
config.status: creating src/ui/ui-drv/BeOS/Makefile
config.status: creating doc/Makefile
config.status: creating help/Makefile
config.status: creating src/include/aconfig.h
------------------------------------------------------------
Compiler options:
 CC          : gcc
 CFLAGS      : -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include
 CFLAGS1     : -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include
 CXXFLAGS    : -O2 -march=pentium4 -pipe -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include
 LDLAGS      :
 LIBS        : -lpng -lz -lm  -lXext -lXxf86dga -lXxf86vm   -lX11
 X_LIBS      :
------------------------------------------------------------

READ CUREFULLY FOLLOWING WARNINGS


configure: WARNING: Long double enabled. This works well for x86 architectures. On other systems this may slow down much. Especially on SUN workstations. If XaoS works incredibly slowly, try to rebuild it using:
   configure --with-long-double=no
   make clean
   make

END OF WARNINGS

In case you have troubles with compiling or running
XaoS please read doc/compilers.txt.
------------------------------------------------------------
make[1]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src'
cp include/config/config.autoconf include/config.h
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/filter'gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o image.o image.c
In file included from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/fractal.h:32,
                 from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/filter.h:319,
                 from image.c:17:
/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/formulas.h:39: error: array type has incomplete element type
make[2]: *** [image.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/filter'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/engine'gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o formulas.o formulas.c
In file included from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/fractal.h:32,
                 from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/filter.h:319,
                 from formulas.c:58:
/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/formulas.h:39: error: array type has incomplete element type
make[2]: *** [formulas.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/engine'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui-hlp'gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o autopilot.o autopilot.c
In file included from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/fractal.h:32,
                 from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/filter.h:319,
                 from autopilot.c:39:
/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/formulas.h:39: error: array type has incomplete element type
make[2]: *** [autopilot.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui-hlp'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui'
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o drivers.o drivers.c
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o ui.o ui.c
In file included from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/fractal.h:32,
                 from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/filter.h:319,
                 from ui.c:55:
/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/formulas.h:39: error: array type has incomplete element type
make[2]: *** [ui.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/util'
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o png.o png.c
In file included from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/fractal.h:32,
                 from /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/filter.h:319,
                 from png.c:18:
/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include/formulas.h:39: error: array type has incomplete element type
make[2]: *** [png.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/util'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui/ui-drv/x11'
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o xlib.o xlib.c
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o ui_x11.o ui_x11.c
rm -f /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuix11.a
ar rc /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuix11.a xlib.o ui_x11.o
ranlib /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuix11.a
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui/ui-drv/x11'
make[2]: Entering directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui/ui-drv/dga'
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include   -c -o ui_dga.o ui_dga.c
ui_dga.c: In function 'store':
ui_dga.c:92: warning: incompatible implicit declaration of built-in function 'memcpy'
ui_dga.c: In function 'restore':
ui_dga.c:111: warning: incompatible implicit declaration of built-in function 'memcpy'
ui_dga.c: In function 'DGA_display':
ui_dga.c:234: warning: incompatible implicit declaration of built-in function 'memcpy'
ui_dga.c: In function 'DGA_processevents':
ui_dga.c:795: warning: incompatible implicit declaration of built-in function 'strlen'
rm -f /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuidga.a
ar rc /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuidga.a ui_dga.o
ranlib /var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/lib/libuidga.a
make[2]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/ui/ui-drv/dga'
gcc -O2 -march=pentium4 -pipe   -I/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src/include  -o /var/tmp/portage/xaos-3.1/work/XaoS-3.1/bin/xaos lib/libui.a lib/libui-hlp.a lib/libengine.a lib/libutil.a lib/libfilter.a lib/libuix11.a lib/libuidga.a  -lpng -lz -lm  -lXext -lXxf86dga -lXxf86vm   -lX11
gcc: lib/libui.a: No such file or directory
gcc: lib/libui-hlp.a: No such file or directory
gcc: lib/libengine.a: No such file or directory
gcc: lib/libutil.a: No such file or directory
gcc: lib/libfilter.a: No such file or directory
make[1]: *** [/var/tmp/portage/xaos-3.1/work/XaoS-3.1/bin/xaos] Error 1
make[1]: Leaving directory `/var/tmp/portage/xaos-3.1/work/XaoS-3.1/src'
make: *** [default] Error 2

!!! ERROR: x11-misc/xaos-3.1 failed.
Call stack:
  ebuild.sh, line 1546:   Called dyn_compile
  ebuild.sh, line 937:   Called src_compile
  xaos-3.1.ebuild, line 72:   Called die

!!! (no error message)
!!! If you need support, post the topmost build error, and the call stack if relevant.