Hi, I'm not sure where else to go for help. I compiled and installed gcc-4.0.1 (see below for configuration) on a Sun V440 running Solaris 10. Our gcc and g++ compilers have no problems. When trying to compile/link fortran code, we get the following error: gfortran fortrantest.f90 /opt/courses/gcc-4.0.1/lib/gcc/sparc-sun-solaris2.10/4.0.1/../../../libgfortran.so: undefined reference to `nextafter@xxxxxxxxxxx' /opt/courses/gcc-4.0.1/lib/gcc/sparc-sun-solaris2.10/4.0.1/../../../libgfortran.so: undefined reference to `frexp@xxxxxxxxxxx' collect2: ld returned 1 exit status Here is the content of fortrantest.f90: write(6,*) "hello" stop end LD_LIBRARY_PATH=/opt/courses/gcc-4.0.1/lib:/opt/courses/lib:/usr/sfw/lib:/usr/lib I configured gcc-4.0.1 with the following options: --prefix=/opt/courses/gcc-4.0.1 --program-suffix=4.0.1 --with-local-prefix=/opt/courses/include --with-gmp=/opt/courses/gmp-4.1.4 --with-mpfr=/opt/courses/mpfr-2.1.1 --enable-languages='c,c++,objc,f95,treelang' --with-gnu-as --with-as=/opt/courses/binutilities-2.14/bin/as --with-gnu-ld --with-ld=/opt/courses/bin/utilities-2.14/bin/ld (then used gmake; gmake install) Thanks. Barb Hawes Southwest MN State University