Intel compiler v8 fun

[Ralf Wildenhues]

The 8.0 version of the Intel C++ compiler brings yet more joy to
automake dependency tracking.
  icc -dryrun 
will exit with 1 instead of 0 (which 7.1 does).  This makes detecting
it in tests/defs.in fail.  On the other hand, it will detect and work
with depmode=gcc (the only thing that fails w/ respect to gcc3 is -MP,
as already noted in PR416).  Thus, tests/depcomp5.test won't check and
fail, but skip.

So finally, I suggest this update, where the fix for compiler detection
is a mere hack (trying to differentiate between an exit of 1 and other
possible problems).  BTW, I have signed papers.

Regards,
Ralf


2004-05-27  Ralf Wildenhues  <address@hidden>

        * tests/defs.in, tests/depcomp5.test: Fix check for Intel
        Compiler version 8: detection failed, support of gcc depmode
        was not accounted for in test.

Index: tests/defs.in
===================================================================
RCS file: /cvs/automake/automake/tests/defs.in,v
retrieving revision 1.29
diff -u -r1.29 defs.in
--- tests/defs.in       23 May 2004 11:04:24 -0000      1.29
+++ tests/defs.in       27 May 2004 08:21:43 -0000
@@ -144,9 +144,9 @@
        # There is no way to ask *only* the compiler's version.
        # This tool always want to do something (by default
        # it will try link *nothing* and complain it cannot find
-       # main(); funny).  -dryrun is a workaround.
+       # main(); funny).  -dryrun is a workaround for version 7.x.
        echo "$me: running $CC -V -dryrun"
-       ( $CC -V -dryrun ) || exit 77
+       ( ( $CC -V -dryrun; if test $? -eq 1; then :; fi ) 2>&1 | grep -i intel 
) || exit 77
        ;;
       makedepend)
        echo "$me: running makedepend -f-"
Index: tests/depcomp5.test
===================================================================
RCS file: /cvs/automake/automake/tests/depcomp5.test,v
retrieving revision 1.1
diff -u -r1.1 depcomp5.test
--- tests/depcomp5.test 11 Feb 2003 18:20:55 -0000      1.1
+++ tests/depcomp5.test 27 May 2004 08:21:43 -0000
@@ -19,6 +19,7 @@
 # Boston, MA 02111-1307, USA.
 
 # Check icc's dependency mode.
+# Note that version 8 supports gcc depmode completely, so we also allow this.
 
 required='icc'
 . ./defs || exit 1
@@ -59,6 +60,6 @@
 $AUTOMAKE -a
 
 ./configure
-grep 'depmode=icc' Makefile
+grep 'depmode=[ig]cc' Makefile
 $MAKE check
 $MAKE grepdeps