Hello everyone. I am trying to build on OS X, but I am getting the following: config.status: linking ../../../../gcc-4.8.2/libgcc/enable-execute-stack-mprotect.c to enable-execute-stack.c config.status: linking ../../../../gcc-4.8.2/libgcc/unwind-generic.h to unwind.h config.status: linking ../../../../gcc-4.8.2/libgcc/config/no-unwind.h to md-unwind-support.h config.status: linking ../../../../gcc-4.8.2/libgcc/config/i386/sfp-machine.h to sfp-machine.h config.status: linking ../../../../gcc-4.8.2/libgcc/gthr-posix.h to gthr-default.h config.status: executing default commands Adding multilib support to Makefile in ../../../../gcc-4.8.2/libgcc with_multisubdir=i386 mkdir ../../.././gcc/i386 In file included from ../../../../gcc-4.8.2/libgcc/libgcc2.c:27:0: ../../../../gcc-4.8.2/libgcc/../gcc/tsystem.h:87:19: fatal error: stdio.h: No such file or directory #include <stdio.h> ^ compilation terminated. make[5]: *** [_muldi3.o] Error 1 make[4]: *** [multi-do] Error 1 make[3]: *** [all-multi] Error 2 make[2]: *** [all-stage1-target-libgcc] Error 2 make[1]: *** [stage1-bubble] Error 2 make: *** [all] Error 2 Ingwie@Ingwies-Air ~/Downloads/gcc-4.8.2-build $ I configured using: ../gcc-4.8.2/configure --enable-lto --enable-ogjc-gc --enable-ld --prefix=/opt/GNUstep --enable-stage1-languages=all --with-gmp=/opt/GNUstep/include/ --with-mpfr=/usr/local/ What is the solution? I do not wish to modify the source files, but I have tried a lot of different environmental variables…nothing happened at all. Kind regards, Kevin Ingwersen