Hi, Using configure --target arm-elf, I get the error: ===================================================================== ... checking for ISO C99 support in <stdio.h>... no checking for ISO C99 support in <stdlib.h>... no checking for fully enabled ISO C99 support... no configure: Debug build flags set to -g3 -O0 checking for additional debug build... no checking for extra compiler flags for building... checking for thread model used by GCC... single checking for atomic builtins... no checking for g++ that supports -ffunction-sections -fdata-sections... yes configure: error: No support for this host/target combination. make[1]: *** [configure-target-libstdc++-v3] Error 1 make[1]: Leaving directory `/home/samiam/gcc-4.2.1/build' make: *** [all] Error 2 ====================================================================== Which I assume comes back to the idea that I have to configure a target library for the compiler. However, the target use for gcc I am making is for ECOS, which supplies its own library, and uses the option flags for gcc that tell it not to use the default startup and libraries. Is it possible to configure so that gcc builds without concern for a target library? Thank you, Scott Moore Powerfile Inc. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.762 / Virus Database: 510 - Release Date: 9/13/2004