***** autoconf *****
***** PWD: /var/tmp/portage/games-emulation/generator-0.35_p4-r1/work/generator-0.35-cbiere-r4
***** autoconf --force

configure.ac:171: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2590: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2606: AC_COMPILE_IFELSE is expanded from...
configure.ac:171: the top level
configure.ac:182: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2590: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2606: AC_COMPILE_IFELSE is expanded from...
configure.ac:182: the top level
configure.ac:230: error: possibly undefined macro: AM_PATH_SDL
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.