>>> Emerging (1 of 1) media-video/subtitleripper-0.3.4-r1 to /
 * subtitleripper-0.3-4.tgz MD5 ;-) ...                                                                                            [ ok ]
 * subtitleripper-0.3-4.tgz size ;-) ...                                                                                           [ ok ]
 * checking ebuild checksums ;-) ...                                                                                               [ ok ]
 * checking auxfile checksums ;-) ...                                                                                              [ ok ]
 * checking miscfile checksums ;-) ...                                                                                             [ ok ]
 * checking subtitleripper-0.3-4.tgz ;-) ...                                                                                       [ ok ]
>>> Unpacking source...
>>> Unpacking subtitleripper-0.3-4.tgz to /var/tmp/portage/subtitleripper-0.3.4-r1/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/subtitleripper-0.3.4-r1/work/subtitleripper ...
Compiling subtitle2pgm.c
Compiling spudec.c
subtitle2pgm.c:31:17: error: ppm.h: No such file or directory
subtitle2pgm.c: In function 'usage':
subtitle2pgm.c:76: warning: implicit declaration of function 'exit'
subtitle2pgm.c:76: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c: In function 'main':
subtitle2pgm.c:119: warning: implicit declaration of function 'ppm_init'
subtitle2pgm.c:156: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:165: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:174: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:183: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:189: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:212: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:217: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:233: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:238: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:246: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:258: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:272: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:293: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:322: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:327: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:336: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:356: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:374: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:406: warning: incompatible implicit declaration of built-in function 'exit'
subtitle2pgm.c:446: warning: pointer targets in passing argument 2 of 'spudec_assemble' differ in signedness
subtitle2pgm.c:459: warning: incompatible implicit declaration of built-in function 'exit'
make: *** [subtitle2pgm.o] Error 1
make: *** Waiting for unfinished jobs....
spudec.c:40:17: error: ppm.h: No such file or directory
spudec.c: In function 'spudec_writeout_ppm':
spudec.c:532: error: 'pixel' undeclared (first use in this function)
spudec.c:532: error: (Each undeclared identifier is reported only once
spudec.c:532: error: for each function it appears in.)
spudec.c:532: error: 'ppm_image' undeclared (first use in this function)
spudec.c:533: error: expected ';' before 'p'
spudec.c:558: warning: implicit declaration of function 'ppm_allocarray'
spudec.c:567: warning: implicit declaration of function 'PPM_ASSIGN'
spudec.c:567: error: 'p' undeclared (first use in this function)
spudec.c:579: warning: implicit declaration of function 'ppm_writeppm'
spudec.c:583: warning: implicit declaration of function 'ppm_freearray'
make: *** [spudec.o] Error 1

!!! ERROR: media-video/subtitleripper-0.3.4-r1 failed.
Call stack:
  ebuild.sh, line 1543:   Called dyn_compile
  ebuild.sh, line 938:   Called src_compile
  subtitleripper-0.3.4-r1.ebuild, line 40:   Called die

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