I couldn't find any other solution to this, but when getting the library flags of pgf90 with -Mconcur (Runs pgipa) there is an empty -l in an ignore string pasted below. This messes up the FCLIBS later and makes the compiler complain becuase it lumps the next argument as the library name. /usr/local/pgi/linux86-64/6.0/bin/pgipa -v -finalo conftest -ignore '-Mextract -L -I -Mkeepasm -Mpreprocess -l -Minline' -nop ..... I was able to solve this by adding -l) ;; to the configure script. I tried adding it to fortran.m4, but rerunning autoconf on configure.ac doesn't put the code in the configure script. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf