https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64184
Bug ID: 64184 Summary: error: '_SC_NPROCESSORS_ONLN' undeclared (first use in this function) Product: gcc Version: 4.9.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other Assignee: unassigned at gcc dot gnu.org Reporter: gcc at ryandesign dot com Created attachment 34190 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34190&action=edit log Building gcc 4.9.2 fails on Mac OS X 10.4.11, with the following message: /Volumes/Data/macports/tiger/var/macports/build/_Volumes_Data_macports_dports_lang_gcc49/libgcc/work/gcc-4.9.2/libcilkrts/runtime/sysdep-unix.c: In function 'write_version_file': /Volumes/Data/macports/tiger/var/macports/build/_Volumes_Data_macports_dports_lang_gcc49/libgcc/work/gcc-4.9.2/libcilkrts/runtime/sysdep-unix.c:736:52: error: '_SC_NPROCESSORS_ONLN' undeclared (first use in this function) fprintf(fp, "System cores: %d\n", (int)sysconf(_SC_NPROCESSORS_ONLN)); ^ /Volumes/Data/macports/tiger/var/macports/build/_Volumes_Data_macports_dports_lang_gcc49/libgcc/work/gcc-4.9.2/libcilkrts/runtime/sysdep-unix.c:736:52: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [sysdep-unix.lo] Error 1 make[2]: Leaving directory `/Volumes/Data/macports/tiger/var/macports/build/_Volumes_Data_macports_dports_lang_gcc49/libgcc/work/build/i386-apple-darwin8/libcilkrts' make[1]: *** [all-target-libcilkrts] Error 2 make[1]: Leaving directory `/Volumes/Data/macports/tiger/var/macports/build/_Volumes_Data_macports_dports_lang_gcc49/libgcc/work/build' make: *** [bootstrap] Error 2