I did this in order to build gcc, libgcc and libstdc++ independently.
when I do the simple integrated build process (following http://gcc.gnu.org/install) : cd $(GCC_OBJDIR); CFLAGS="-g -O0" $(GCC_SRCDIR)/configure -quiet --prefix=$(INSTALLDIR) --target=$(TARGET) --enable-languages=c,c++,ada --disable-nls --disable-decimal-float --disable-fixed-point --disable-libmudflap --disable-libffi --disable-libssp --disable-shared --disable-threads --without-headers --disable-libada --enable-version-specific-runtime-lib --disable-bootstrap --enable-checking=release make -C $(GCC_OBJDIR) I encounter a problem on libstdc++v3 : Configuring in prism/libstdc++-v3 Configuring in prism/libiberty configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES. make[2]: *** [configure-target-libiberty] Error 1 make[2]: *** Waiting for unfinished jobs.... configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES. make[2]: *** [configure-target-libstdc++-v3] Error 1 make[1]: *** [all] Error 2 make: *** [gcc_make] Error 2 because stdio.h is not found (my libc is externally built and --without-header prevent gcc from knowing where are these headers) I tried --with-headers with my own libc header files (incomplete home made libc) but this time I found stuck on libgcc2 requiring unistd.h that I don't have (or want) : In file included from /vues_statiques/FPGA/belbachir/prism2/MPUCores/tools/gcc-4.5.2/libgcc/../gcc/libgcc2.c:29:0: /vues_statiques/FPGA/belbachir/prism2/MPUCores/tools/gcc-4.5.2/libgcc/../gcc/tsystem.h:102:20: fatal error: unistd.h: No such file or directory compilation terminated. So, to build libgcc I would need --without-header to compensate for my small libc, and to build libstdc++ I would have to use --with-header in order to provide stdio.h ... Do you know a better way to solve that than building gcc, libgcc & libstdc++ independently ?
