build/autoconf/mozcommonheader.m4:6: error: AC_LANG_COMPILER: unknown language: _AC_LANG
../../lib/autoconf/lang.m4:329: AC_LANG_COMPILER_REQUIRE is expanded from...
../../lib/autoconf/general.m4:2606: AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2614: AC_TRY_COMPILE is expanded from...
../../lib/m4sugar/m4sh.m4:639: AS_IF is expanded from...
../../lib/autoconf/general.m4:2031: AC_CACHE_VAL is expanded from...
build/autoconf/mozheader.m4:6: MOZ_CHECK_HEADER is expanded from...
build/autoconf/mozheader.m4:25: MOZ_CHECK_HEADERS is expanded from...
build/autoconf/mozcommonheader.m4:6: the top level
autom4te: /usr/bin/m4 failed with exit status: 1
build/autoconf/mozcommonheader.m4:6: error: AC_LANG_COMPILER: unknown language: _AC_LANG
../../lib/autoconf/lang.m4:329: AC_LANG_COMPILER_REQUIRE is expanded from...
../../lib/autoconf/general.m4:2606: AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2614: AC_TRY_COMPILE is expanded from...
../../lib/m4sugar/m4sh.m4:639: AS_IF is expanded from...
../../lib/autoconf/general.m4:2031: AC_CACHE_VAL is expanded from...
build/autoconf/mozheader.m4:6: MOZ_CHECK_HEADER is expanded from...
build/autoconf/mozheader.m4:25: MOZ_CHECK_HEADERS is expanded from...
build/autoconf/mozcommonheader.m4:6: the top level
autom4te: /usr/bin/m4 failed with exit status: 1
autoreconf: /usr/bin/autoconf failed with exit status: 1