Good evening. Currently i'm using gcc 4.1.2. Now i wanted to install ATLAS (for linear algebra), and its README file recommended to use either gcc 3 or gcc 4.2, since gcc 4.1 produces ATLAS code that is significantly slower. Therefore i tried to install gcc 4.2.1 First, i don't know how to tell yast that it shall install gcc 4.2.1 (yast would only install 4.1). Perhaps you have a hint... Then, i downloaded the sources, and did ./configure and make. But make failed. In the end, i got In file included from /usr/include/features.h:346, from /usr/include/stdio.h:28, from ../.././gcc/tsystem.h:90, from ../.././gcc/crtstuff.c:68: /usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: Datei oder Verzeichnis nicht gefunden make[5]: *** [32/crtbegin.o] Fehler 1 make[5]: Leaving directory `/usr/local/gcc-4.2.1/host-x86_64-unknown-linux-gnu/gcc' make[4]: *** [extra32] Fehler 2 make[4]: Leaving directory `/usr/local/gcc-4.2.1/host-x86_64-unknown-linux-gnu/gcc' make[3]: *** [stmp-multilib] Fehler 2 make[3]: Leaving directory `/usr/local/gcc-4.2.1/host-x86_64-unknown-linux-gnu/gcc' make[2]: *** [all-stage1-gcc] Fehler 2 make[2]: Leaving directory `/usr/local/gcc-4.2.1' make[1]: *** [stage1-bubble] Fehler 2 make[1]: Leaving directory `/usr/local/gcc-4.2.1' make: *** [all] Fehler 2 Here is information on my computer: uname -a says: Linux mpc739 2.6.18.8-0.3-default #1 SMP Tue Apr 17 08:42:35 UTC 2007 x86_64 x86_64 x86_64 GNU/Linux The linux is openSUSE 10.2 (X86-64) Processor: AMD Athlon(tm) 64 Processor 3700+ RAM: 1028080 kB (MemTotal) or 2104472 including swaps Yours sincerely Simon