In the bug tracker octave, in which gnulib components are used, _GL_CXXALIAS_SYS (raise, int, (int sig)); in signal.h seems to give compile error.
https://savannah.gnu.org/bugs/?34378 John W. Eaton said in comment #3 in the above tracker that ********************************************* I'm fairly sure this is a bug in gnulib, so needs to be fixed there. There shouldn't be two _GL_CXXALIAS_SYS (raise, int, (int sig)); lines in the libgnu/signal.h file, or if there are, they should be fixed so that they don't conflict. But in any case, that's something for the gnulib developers to fix. ********************************************* I have comment out one of _GL_CXXALIAS_SYS (raise, int, (int sig)); lines compile error was disappeared. Regards Tatsuro