Joerg Frochte wrote: > Hi, > > I tried to compile gcc-4.2.2 with openmp support under cygwin. > To do so, I previously installed gmp-4.2.2 and mpfr-2.3.0. > Now I start configure and up like this: > > ---------------- > $ ./configure --prefix=/usr/local/ --enable-languages=c > checking for correct version of gmp.h... yes > checking for correct version of mpfr.h... yes > checking for any version of mpfr.h... yes > *** This configuration is not supported in the following subdirectories: > target-libmudflap target-libgomp target-libffi target-zlib target-libjava t > arget-libada gnattools target-libstdc++-v3 target-libgfortran zlib target-libobj > c target-boehm-gc > (Any other directories should still work fine.) > ---------------- > > Now I am a bit confused. What is still missing? > Because target-libgomp is of course required for the openmp-support. As libgomp isn't enabled by default for cygwin (presumably owing to the missing pieces), you must add --enable-libgomp if you want to try it. gmp and mpfr are needed for fortran target; they have nothing to do with turning on libgomp. This is clearly not a gcc list question; gcc-help should be OK.