Mine

jpegqual.o: In function `analyze_file':
jpegqual.c:(.text+0x4bd): undefined reference to `jpeg_std_error'
jpegqual.c:(.text+0x4ff): undefined reference to `jpeg_CreateDecompress'
jpegqual.c:(.text+0x511): undefined reference to `jpeg_stdio_src'
jpegqual.c:(.text+0x522): undefined reference to `jpeg_read_header'
jpegqual.c:(.text+0x5c1): undefined reference to `jpeg_destroy_decompress'
jpegqual.c:(.text+0x5ed): undefined reference to `jpeg_destroy_decompress'
collect2: ld returned 1 exit status
make[3]: *** [jpegqual] Error 1
make[3]: Leaving directory `/var/tmp/portage/media-gfx/gimp-2.4.2/work/gimp-2.4.2/plug-ins/jpeg'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/media-gfx/gimp-2.4.2/work/gimp-2.4.2/plug-ins'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/media-gfx/gimp-2.4.2/work/gimp-2.4.2'
make: *** [all] Error 2
 * 
 * ERROR: media-gfx/gimp-2.4.2 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2599:  Called die
 * The specific snippet of code:
 *       emake || die "emake failed"
 *  The die message:
 *   emake failed
 *