creating plasma
/bin/sh ../../libtool --tag=CC --mode=link i686-pc-linux-gnu-gcc  -march=pentium4 -O2 -pipe -fomit-frame-pointer -fomit-frame-pointer -Wall   -o pnm  pnm.o ../../libgimp/libgimpui-2.0.la ../../libgimpwidgets/libgimpwidgets-2.0.la ../../libgimp/libgimp-2.0.la ../../libgimpcolor/libgimpcolor-2.0.la ../../libgimpbase/libgimpbase-2.0.la -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lglib-2.0     
i686-pc-linux-gnu-gcc -march=pentium4 -O2 -pipe -fomit-frame-pointer -fomit-frame-pointer -Wall -o .libs/png png.o  ../../libgimp/.libs/libgimpui-2.0.so ../../libgimpwidgets/.libs/libgimpwidgets-2.0.so ../../libgimp/.libs/libgimp-2.0.so ../../libgimpcolor/.libs/libgimpcolor-2.0.so ../../libgimpbase/.libs/libgimpbase-2.0.so /usr/lib/libpng12.so -lz /usr/lib/libgtk-x11-2.0.so /usr/lib/libgdk-x11-2.0.so /usr/lib/libatk-1.0.so /usr/lib/libgdk_pixbuf-2.0.so -lm /usr/lib/libpangocairo-1.0.so /usr/lib/libpango-1.0.so /usr/lib/libcairo.so /usr/lib/libgobject-2.0.so /usr/lib/libgmodule-2.0.so -ldl /usr/lib/libglib-2.0.so
png.o: In function `load_image':
png.c:(.text+0x7ad): undefined reference to `png_read_destroy'
png.o: In function `save_image':
png.c:(.text+0x17b3): undefined reference to `png_write_destroy'
collect2: ld returned 1 exit status
make[3]: *** [png] Error 1
make[3]: *** Waiting for unfinished jobs....
i686-pc-linux-gnu-gcc -march=pentium4 -O2 -pipe -fomit-frame-pointer -fomit-frame-pointer -Wall -o .libs/pnm pnm.o  ../../libgimp/.libs/libgimpui-2.0.so ../../libgimpwidgets/.libs/libgimpwidgets-2.0.so ../../libgimp/.libs/libgimp-2.0.so ../../libgimpcolor/.libs/libgimpcolor-2.0.so ../../libgimpbase/.libs/libgimpbase-2.0.so /usr/lib/libgtk-x11-2.0.so /usr/lib/libgdk-x11-2.0.so /usr/lib/libatk-1.0.so /usr/lib/libgdk_pixbuf-2.0.so -lm /usr/lib/libpangocairo-1.0.so /usr/lib/libpango-1.0.so /usr/lib/libcairo.so /usr/lib/libgobject-2.0.so /usr/lib/libgmodule-2.0.so -ldl /usr/lib/libglib-2.0.so
creating pnm
make[3]: Leaving directory `/var/tmp/portage/gimp-2.2.10/work/gimp-2.2.10/plug-ins/common'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/gimp-2.2.10/work/gimp-2.2.10/plug-ins'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/gimp-2.2.10/work/gimp-2.2.10'
make: *** [all] Error 2

!!! ERROR: media-gfx/gimp-2.2.10 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  gimp-2.2.10.ebuild, line 134:   Called die

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