Comment out the PAC_C_RESTRICT test from ROMIO's configure.in script.

The top-level OMPI configure script already checks for "restrict" and
will issue a #define for it.  PAC_C_RESTRICT would also check for
restrict, but sometimes come up with a different answer than the
top-level OMPI configure script, thereby resulting in conflicting
#define's for "restrict" (e.g., icc 9.0/9.1 on linux x86-64).

So it's easiest just to remove this test from ROMIO's configure.in
script.

This commit was SVN r14286.

ompi/mca/io/romio/romio/configure.in

@@ -1987,7 +1987,14 @@ else
    F77MPIOINC="include 'mpiof.h'"
 fi
 
-PAC_C_RESTRICT
+# Open MPI: OMPI's top-level configure script already has a check for
+# "restrict"; PAC_C_RESTRICT seems to sometimes come up with a
+# different answer than the OMPI top-level test, resulting in
+# conflicting #define's for the keyword "restrict" (e.g., using icc
+# compilers on Linux).  So just comment out PAC_C_RESTRICT and use the
+# #define from the top-level OMPI configure test.
+# #define's for restrict).
+dnl PAC_C_RESTRICT
 PAC_C_GNU_ATTRIBUTE
 #
 dnl CFLAGS="$CFLAGS $DEFS"