Hello all, When using a toolchain w/o a libc, AC_PROG_CC fails with "cannot compile executables" because the link fails with an unresolved reference to "_exit". While these types of embedded projects don't have much to really configure, the rest of autotools can be very helpful.
So for "bear metal" (and I'm imagining a bear with an electric guitar and head banging), I've found that this can be a work-around: CC=${host}-gcc m4_define([_AC_COMPILER_EXEEXT],[]) AC_PROG_CC The first problem is that if I pass --host=arm-noen-eabi (misspeled) and run w/o this, then configure succeeds, but only because it built my code with the native compiler. I would suggest this is a bug. Redefining _AC_COMPILER_EXEEXT elides the check for building executables (because we inherently cannot and shouldn't) and relies upon _AC_COMPILER_OBJEXT for the actual validation. The only side-effect is a some-what misleading error message upon failure: checking for suffix of object files... configure: error: in `/home/daniel/proj/embedded/candleLight/fw/build/autotools': configure: error: cannot compute suffix of object files: cannot compile Sorry for all the spelling puns -- unless you were amused, in which case well aren't I -annoying-, I mean clever? Thanks, Daniel