I am trying to port a model to AIX. The model uses cc cxx and fc compilers. The problem is that the IBM xlf compilers do not recognize the -D preprocessor flag and I am at my wits end trying to get the tools to do the right thing. I can handle a conditional edit of the FCFLAGS in configure.in FCFLAGS=$(echo $FCFLAGS | sed 's/-D/-WF,-D/g') but problems hound me. 1. CPPFLAGS is used in PPFCCOMPILE and LTPPFCCOMPILE but since CPPFLAGS is also used for c and cxx I can't substitute that. 2. DEFS= -DHAVE_CONFIG_H is also defined and used in the same places 3. libtool defines pic_flag=' -DPIC' Anyone have a good solution? _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf