Add support for Assembler with C Preprocessor (.S) compilation

Specifically, the c module now provides the c.as-cpp submodules which can be
loaded in order to register the S{} target type and enable Assembler with C
Preprocessor compilation in the c compile rule. For details, refer to
"Assembler with C Preprocessor Compilation" in the manual.

1 files changed, 1 insertions, 0 deletions

diff --git a/libbuild2/c/target.hxx b/libbuild2/c/target.hxx
index 308bda9..39fcf89 100644
--- a/libbuild2/c/target.hxx
+++ b/libbuild2/c/target.hxx
@@ -16,6 +16,7 @@ namespace build2
     using cc::h;
     using cc::c;
     using cc::m;
+    using cc::S;
   }
 }