I tried to get some info for the Tcl/Tk library file that is not linked because it is regarded by the linker as "incompatible". . mauede@linux:/home/mokhov/restricted/mars15/linux/lib> file -k libm15gui_linux.a libm15gui_linux.a: current ar archive\012- archive file\012- Assembler source Then I enquired about "ar". I remember Dr.Mockov typing "ar" during our Monte Carlo code installation attempt. In fact I had never seen such a command before and asked him about it. He said it archives files. I just typed in "man ar" and read the following: mauede@linux:~/cernlib.32-2005-ifh.de/2005/lib> man ar NAME ar - create, modify, and extract from archives ...................................................................... ...................................................................... ar ignores an initial option spelt -X32_64, for compatibility with AIX. The behaviour produced by this option is the default for GNU ar. ardoes not support any of the other -X options; in particular, it does not support -X32 which is the default for AIX ar. What is the meaning and consequence of not supporting the option "-X32" ? I do not know what this option does (never seen before) and am caught by phobia at reading he magic number "32" .... I wonder if there is any relation with this unsupported option and the linker regarding the file "libm15gui_linux.a" as incompatible with the rest of the objects being generated by compiling with the option -m32 .... See the following errors returned by the linker .... ************************************************************************* * Errors from launching the make that includes all libraries * ************************************************************************* mauede@linux:/home/mokhov/restricted/mars15> make g77 -m32 -static -L/home/mauede/cernlib.32- 2005-ifh.de/2005/lib -L/home/mokhov/restricted/mars15/linux/lib -L/home/mokhov/restricted/mcnp4c/linux/lib -L/home/mokhov/restricted/mars15/linux/lib -L/home/mokhov/restricted/mars15/linux/lib -o rmars-bnab-fems-linux marsmain.o m1505.o -lm15gui_linux -lm15linux -lm15fems_linux -lm15trneu_linux -lm15treem_linux -lm15eve_linux -lm15cem03_linux -lm15ext_linux -lm15blb_linux -lm15mpino_linux -lm15linux -lpacklib -ltk8.3 -ltcl8.3 -L/usr/X11R6/lib -lX11 -ldl -lnsl -lpthread /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /home/mokhov/restricted/mars15/linux/lib/libm15gui_linux.a when searching for -lm15gui_linux /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /home/mokhov/restricted/mars15/linux/lib/libm15gui_linux.a when searching for -lm15gui_linux /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /home/mokhov/restricted/mars15/linux/lib/libm15gui_linux.a when searching for -lm15gui_linux /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.5/../../../../x86_64-suse-linux/bin/ld: cannot find -lm15gui_linux collect2: ld returned 1 exit status make: *** [rmars-bnab-fems-linux] Error 1 -- Maura E.M