Add ability to limit amount of preprocessing done on source

The cc.preprocessed variable can be 'none' (not preprocessed), 'includes' (no
depends on preprocessor, e.g., #ifdef, etc), and 'all' (the source is fully
preprocessed). Note that for 'all' the source can still contain comments and
line continuations.

1 files changed, 5 insertions, 4 deletions

diff --git a/build2/cc/common.hxx b/build2/cc/common.hxx
index 135f5b1..55e6675 100644
--- a/build2/cc/common.hxx
+++ b/build2/cc/common.hxx
@@ -30,7 +30,7 @@ namespace build2
       lang x_lang;
 
       const char* x;         // Module name ("c", "cxx").
-      const char* x_name;    // Compiler name ("c", "c++"; also used in -x).
+      const char* x_name;    // Compiler name ("c", "c++").
       const char* x_default; // Compiler default ("gcc", "g++").
       const char* x_pext;    // Preprocessed source extension (".i", ".ii").
 
@@ -64,9 +64,10 @@ namespace build2
       const variable& c_export_loptions;
       const variable& c_export_libs;
 
-      const variable& c_type;       // cc.type
-      const variable& c_system;     // cc.system
-      const variable& c_reprocess;  // cc.reprocess
+      const variable& c_type;         // cc.type
+      const variable& c_system;       // cc.system
+      const variable& c_reprocess;    // cc.reprocess
+      const variable& c_preprocessed; // cc.preprocessed
 
       const variable& x_std;