Fix problem when $CC or $CXX where multiple tokens. A similar fix

when in for $F77 and $FC long ago.

Thanks to Brian Barrett for noticing and submitting a patch.

This commit was SVN r16864.

config/ompi_setup_cc.m4

@@ -304,6 +304,8 @@ AC_DEFUN([_OMPI_PROG_CC],[
     BASECC="`basename $CC`"
     CFLAGS="$ompi_cflags_save"
     AC_DEFINE_UNQUOTED(OMPI_CC, "$CC", [OMPI underlying C compiler])
-    OMPI_CC_ABSOLUTE="`which $CC`"
+    set dummy $CC
+    ompi_cc_argv0=[$]2
+    OMPI_CC_ABSOLUTE="`which $ompi_cc_argv0`"
     AC_SUBST(OMPI_CC_ABSOLUTE)
 ])

config/ompi_setup_cxx.m4

@@ -253,7 +253,9 @@ AC_DEFUN([_OMPI_PROG_CXX],[
     BASECXX="`basename $CXX`"
     CXXFLAGS="$ompi_cxxflags_save"
     AC_DEFINE_UNQUOTED(OMPI_CXX, "$CXX", [OMPI underlying C++ compiler])
-    OMPI_CXX_ABSOLUTE="`which $CXX`"
+    set dummy $CXX
+    ompi_cxx_argv0=[$]2
+    OMPI_CXX_ABSOLUTE="`which $ompi_cxx_argv0`"
     AC_SUBST(OMPI_CXX_ABSOLUTE)
 
     OMPI_CXX_COMPILER_VENDOR([ompi_cxx_vendor])