"Adam Markiewicz" <amgo100@xxxxxxxxx> writes: > I'm trying to build a cross-toolchain with x86_64 target. I've successfully > compiled binutils-2.22, gmp-5.0.4, mpc-0.9 and mpfr-3.1.0, however I'm stuck > with gcc-4.7.0. I configured it with > > ../gcc-4.7.0/configure > --prefix=/cross-tools --build=$HOST --host=$HOST --target=$TARGET > --with-sysroot=/mnt/root --disable-shared --disable-nls > --with-mpfr=/cross-tools --with-gmp=/cross-tools > --without-ppl --without-cloog > --disable-decimal-float --disable-libgomp --disable-libmudflap > --disable-libssp --disable-threads --disable-multilib > --enable-languages=c --without-headers > > and got the following error: > > make[2]: Entering directory > `/mnt/root/sources/gcc-build/x86_64-cerebro-linux-gnu/libgcc' > # If this is the top-level multilib, build all the other > # multilibs. > /mnt/root/sources/gcc-build/./gcc/xgcc -B/mnt/root/sources/gcc-build/./gcc/ > -B/cross-tools/x86_64-cerebro-linux-gnu/bin/ > -B/cross-tools/x86_64-cerebro-linux-gnu/lib/ -isystem > /cross-tools/x86_64-cerebro-linux-gnu/include -isystem > /cross-tools/x86_64-cerebro-linux-gnu/sys-include -g -O2 -O2 -g -O2 > -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wcast-qual > -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem > ./include -fpic -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector > -fpic -I. -I. -I../.././gcc -I../../../gcc-4.7.0/libgcc > -I../../../gcc-4.7.0/libgcc/. -I../../../gcc-4.7.0/libgcc/../gcc > -I../../../gcc-4.7.0/libgcc/../include -DHAVE_CC_TLS -DUSE_TLS -o > _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c > ../../../gcc-4.7.0/libgcc/libgcc2.c > In file included from ../../../gcc-4.7.0/libgcc/libgcc2.c:29:0: > ../../../gcc-4.7.0/libgcc/../gcc/tsystem.h:88:19: fatal error: stdio.h: No > such file or directory > compilation terminated. > make[2]: *** [_muldi3.o] Error 1 > make[2]: Leaving directory > `/mnt/root/sources/gcc-build/x86_64-cerebro-linux-gnu/libgcc' > make[1]: *** [all-target-libgcc] Error 2 > make[1]: Leaving directory `/mnt/root/sources/gcc-build' > > As I understand --without-headers option should prevent compiler from > looking for libc headers. Why therefore it is looking for (and missing) > stdio.h? The --without-headers option is overridden by the --with-sysroot option. If you supply --with-sysroot, the gcc build assumes that it can find the header files under there. In your case, the header files are expected to be in /mnt/root/usr/include. Ian
