Driving: gfortran -mmacosx-version-min=10.8.5 -v -Wall gosia2_20081208.14.surface.f -o gosia2_surface_test -l gfortran -shared-libgcc Using built-in specs. COLLECT_GCC=gfortran COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin12/4.6.4/lto-wrapper Target: x86_64-apple-darwin12 Configured with: /opt/local/var/macports/build/_opt_mports_dports_lang_gcc46/gcc46/work/gcc-4.6.4/configure --prefix=/opt/local --build=x86_64-apple-darwin12 --enable-languages=c,c++,objc,obj-c++,lto,fortran --libdir=/opt/local/lib/gcc46 --includedir=/opt/local/include/gcc46 --infodir=/opt/local/share/info --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-4.6 --with-local-prefix=/opt/local --with-libiconv-prefix=/opt/local --with-system-zlib --disable-nls --program-suffix=-mp-4.6 --with-gxx-include-dir=/opt/local/include/gcc46/c++/ --with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --with-ppl=/opt/local --with-cloog=/opt/local --enable-cloog-backend=isl --disable-cloog-version-check --enable-stage1-checking --disable-multilib --enable-lto --enable-libstdcxx-time --with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket --disable-ppl-version-check --with-pkgversion='MacPorts gcc46 4.6.4_3' Thread model: posix gcc version 4.6.4 (MacPorts gcc46 4.6.4_3) COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.8.5' '-v' '-Wall' '-o' 'gosia2_surface_test' '-shared-libgcc' '-mtune=core2' /opt/local/libexec/gcc/x86_64-apple-darwin12/4.6.4/f951 gosia2_20081208.14.surface.f -ffixed-form -fPIC -quiet -dumpbase gosia2_20081208.14.surface.f -mmacosx-version-min=10.8.5 -mtune=core2 -auxbase gosia2_20081208.14.surface -Wall -version -fintrinsic-modules-path /opt/local/lib/gcc46/gcc/x86_64-apple-darwin12/4.6.4/finclude -o /var/folders/59/jbgfvmm54xbg2fhp_swhgl2c0000gn/T//ccjHi0H7.s GNU Fortran (MacPorts gcc46 4.6.4_3) version 4.6.4 (x86_64-apple-darwin12) compiled by GNU C version 4.6.4, GMP version 5.1.2, MPFR version 3.1.1-p2, MPC version 1.0.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU Fortran (MacPorts gcc46 4.6.4_3) version 4.6.4 (x86_64-apple-darwin12) compiled by GNU C version 4.6.4, GMP version 5.1.2, MPFR version 3.1.1-p2, MPC version 1.0.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 f951: internal compiler error: Illegal instruction: 4 Please submit a full bug report, with preprocessed source if appropriate. See for instructions.