Dear all I am trying to install Gcc-5.5.0 on a BGQ Cluster using a build script which successfully installs Gcc-4.8.1. I didn't change much of that script, just the versions of required libs: binutils-2.30 gmp-6.1.2 mpfr-4.0.1 mpc-1.1.0 isl-0.17.1 cloog-0.18.4 In my attempts, make fails at: /usr/bin/install -c -m 644 unwind.h ...../gcc-5.5.0/lib/gcc/powerpc64-bgq-linux/5.5.0/include make[2]: Leaving directory `...../gcc/gcc-5.5.0-work/powerpc64-bgq-linux/libgcc' /bin/sh: line 3: cd: powerpc64-bgq-linux/libstdc++-v3: No such file or directory make[1]: *** [install-target-libstdc++-v3] Error 1 "libstdc++-v3" exists in gcc-5.5.0 source folder. So it comes with the package however is not copied to gcc-5.5.0-work folder somehow. Also from the log.make: checking whether the ...../gcc/gcc-5.5.0-work/./gcc/xgcc -B/..../gcc/gcc-5.5.0-work/./gcc/ -B/..../gcc-5.5.0/powerpc64-bgq-linux/bin/ -B/..../gcc-5.5.0/powerpc64-bgq-linux/lib/ -isystem /..../gcc-5.5.0/powerpc64-bgq-linux/include -isystem /..../gcc-5.5.0/powerpc64-bgq-linux/sys-include linker (/..../gcc/gcc-5.5.0-work/./gcc/collect-ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... no checking dynamic linker characteristics... make[1]: Leaving directory `...../gcc/gcc-5.5.0-work' Any help is much appreciated Fatih Ertinaz Configuration flags: configure --prefix $INSTALLDIR --disable-bootstrap --program-suffix=${GCC_VER} --enable-lto \ --disable-checking --enable-shared \ --enable-threads=posix --enable-gomp \ --target=powerpc64-bgq-linux \ --host=powerpc64-linux-gnu \ --build=powerpc64-linux-gnu \ --enable-secureplt --disable-libmudflap \ --disable-libspp --disable-libgcj \ --enable-languages=c,c++,fortran,lto \ --disable-multilib --with-long-double-128 \ --with-headers=${SYSROOT}/sys-include \ --with-libs=${SYSROOT}/lib \ --with-bin=${SYSROOT}/bin \ --with-sbin=${SYSROOT}/sbin \ --with-gmp=$INSTALLDIR/requiredLibs \ --with-mpc=$INSTALLDIR/requiredLibs \ --with-mpfr=$INSTALLDIR/requiredLibs \ --with-ppl=$INSTALLDIR/requiredLibs \ --with-cloog=$INSTALLDIR/requiredLibs --enable-cloog-backend=isl