On Jul 10, 2010, at 7:07 PM, Gerald Pfeifer wrote: > Todd, > > On Wed, 19 May 2010, Todd Rinaldo wrote: >> I'm writing to report a discrepancy in >> http://gcc.gnu.org/install/prerequisites.html >> >> I just discovered that if gmp is boot strapped during gcc build and an >> older m4 exists, when gmp calls flex, it will fail during configure >> with: >> >> checking for flex... flex >> checking lex output file root... configure: error: cannot find output from >> flex; giving up >> >> I mention this because the prerequisites page specifies m4 as optional >> if you're just building gcc. m4 appears to have a minimal requirement if >> gmp is being boot strapped. > > thanks for the report, Todd. You mention m4, yet the output you show > is around flex? > > I can update our documentation, but need more details and confirmation > by the respective GCC maintainers on what exactly to adjust. >
Gerald, thanks for the reply. When it fell over, I dug into the config.log file and was able to determine that it was a bad m4 macro. I can try to re-produce it to get you more details, but it may take me a while to get to it. Do you want me to do this? Thanks, Todd
