(NON_GNU_CPP): Use associated preprocessor when compiling with Sun

Studio on Solaris.

1 files changed, 6 insertions, 1 deletions

diff --git a/configure.in b/configure.in
index 75f02f7b7de..d68c8aa841d 100644
--- a/configure.in
+++ b/configure.in
@@ -1030,7 +1030,12 @@ dnl see the `changequote' comment above.
                 ;;
       *-sunos5* | *-solaris* )
                 opsys=sol2-6
-                NON_GNU_CPP=/usr/ccs/lib/cpp
+                if [ "x$CC" = x/opt/SUNWspro/bin/cc ]; then
+                  ## -Xs prevents spurious whitespace.
+                  NON_GNU_CPP="/opt/SUNWspro/bin/cc -E -Xs"
+                else
+                  NON_GNU_CPP=/usr/ccs/lib/cpp
+                fi
                 ;;
       *                   ) opsys=bsd4-2   ;;
     esac