Hi, GCC's -g option takes an optional argument. If you add to the command line: ./configure --enable-debug --disable-fast-install CFLAGS=-ggdb3 at some point, the script will remove the "-g" and then add it back in with a space + eval 'ac_val=$ac_configure_args' ++ ac_val=' '\''--enable-debug'\'' '\''--disable-fast-install'\'' '\''CFLAGS=-ggdb3'\'' '\''CC=/usr/bin/gcc'\'' '\''--with-packager=Bruce'\'' '\''--with-packager-version=2013-01-12'\'' '\''--with-packager-bug-reports=bkorb@xxxxxxx'\''' [....] + eval 'ac_val=$ac_cv_env_CFLAGS_value' ++ ac_val=-ggdb3 + eval 'ac_val=$ac_save_CFLAGS' ++ ac_val=-ggdb3 + eval 'ac_val=$ac_try_echo' ++ ac_val='configure:16225: /usr/bin/gcc -std=gnu99 -o conftest -g gdb3 conftest.c -ldl >&5' I'd like to find the cause, but I just don't have the hours it would take. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf