Commit 5d9d10e0806743b0be8e672aeb94c1e67c85c163
2012-02-22T22:39:03
tests: looks for GNU compilers at configure time This way, if the generic C compiler determined configure time is recognized to be the GNU C compiler, we can reuse it instead of looking for a compiler named "gcc" (over and over again) in the test scripts requiring the GNU C compiler. Ditto for the C++, Fortran, and Fortran 77 compilers. This change will improve coverage by allowing us to more easily use non-default GNU compilers throughout the testsuite. And as a bonus, this change also removes a weakness from our testsuite that could cause spurious failures when flags passed to the generic compilers were erroneously reused for the GNU compilers; see automake bug#10859. * configure.ac: Look for the GNU compilers explicitly. Improve some configure output and diagnostic since we are at it. * tests/defs-static.in ($GNU_CC, $GNU_CXX, $GNU_FC, $GNU_F77): Initialize with the values determined at configure time (while allowing user overrides). * tests/Makefile.am (do_edit): Also substitute the configure-time values of GNU_CC, GNU_CXX, GNU_FC and GNU_F77. * tests/defs (gcc, g++, gfortran, g77): Use the values for the GNU compilers determined at configure time (i.e., $GNU_CC for the GNU C compiler, and so on).