Hi Sorry if this has been answered elsewhere, but I can't find an obvious reference to it. If this requires an RTFM, could you give me a clue where in TFM? I found a reference to __gfortran_filename, __gfortran_ioparm, & __gfortran_line in a discussion on threads but this didn't give an obvious reason why I was suddenly encountering this error. Note that the _only_ difference in my two builds is the compiler. All libraries, flags, etc are identical (so it may just mean that I need to add another library - but which one?). I have been trying to build my code on an Intel iMac - with gfortran 4.0.3 compilation & linking goes okay and the executable is usable (though there are some unwanted features introduced by small bugs in the compiler, which I believe may have been addressed in newer versions). With gfortran 4.2.0 I get the following error on linking (in both cases I use the command "gfortran" for the linking, but this seems to explicitly invoke odcctools in 4.2.0); /sw/lib/odcctools/bin/ld: Undefined symbols: __gfortran_filename __gfortran_ioparm __gfortran_line collect2: ld returned 1 exit status make[2]: *** [ipmosflm] Error 1 make[1]: *** [all] Error 2 make: *** [all] Error 2 The gfortran 4.2.0 was installed from the "unstable" branch of fink (gcc4, 2:4.1.999-20060527). ************************************************************** Compiler/linker details: mosflm> /usr/local/bin/gfortran -v Using built-in specs. Target: i386-apple-darwin8.5.3 Configured with: ../gcc-4.0.3/configure --enable-languages=fortran Thread model: posix gcc version 4.0.3 mosflm> /sw/bin/gfortran -v Using built-in specs. Target: i386-apple-darwin8 Configured with: ../gcc-4.2-20060527/configure --prefix=/sw --prefix=/sw/lib/gcc4 --disable-multilib --enable-languages=c,c++,fortran,objc,java --infodir=/sw/lib/gcc4/share/info --with-gmp=/sw --with-included-gettext --host=i386-apple-darwin8 --with-as=/sw/lib/odcctools/bin/as --with-ld=/sw/lib/odcctools/bin/ld --with-nm=/sw/lib/odcctools/bin/nm Thread model: posix gcc version 4.2.0 20060527 (experimental) mosflm> /sw/lib/odcctools/bin/ld -v Apple Computer, Inc. version odcctools-590.36od13 ************************************************************** I tried to do "make bootstrap" with gcc 4.1.1 to try that version, but the build of the compiler failed (so that's another problem. ho hum...) Harry -- Dr Harry Powell, MRC Laboratory of Molecular Biology, MRC Centre, Hills Road, Cambridge, CB2 2QH
