Move cc build system module to separate library

1 files changed, 96 insertions, 0 deletions

diff --git a/libbuild2/cc/target.hxx b/libbuild2/cc/target.hxx
new file mode 100644
index 0000000..885bf68
--- /dev/null
+++ b/libbuild2/cc/target.hxx
@@ -0,0 +1,96 @@
+// file      : libbuild2/cc/target.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_CC_TARGET_HXX
+#define LIBBUILD2_CC_TARGET_HXX
+
+#include <libbuild2/types.hxx>
+#include <libbuild2/utility.hxx>
+
+#include <libbuild2/target.hxx>
+
+#include <libbuild2/cc/export.hxx>
+
+namespace build2
+{
+  namespace cc
+  {
+    // This is an abstract base target for all c-common header/source files.
+    // We use this arrangement during rule matching to detect "unknown" (to
+    // this rule) source/header files that it cannot handle but should not
+    // ignore either. For example, a C link rule that sees a C++ source file.
+    //
+    class LIBBUILD2_CC_SYMEXPORT cc: public file
+    {
+    public:
+      using file::file;
+
+    public:
+      static const target_type static_type;
+      virtual const target_type& dynamic_type () const = 0;
+    };
+
+    // There is hardly a c-family compilation without a C header inclusion.
+    // As a result, this target type is registered for any c-family module.
+    //
+    class LIBBUILD2_CC_SYMEXPORT h: public cc
+    {
+    public:
+      using cc::cc;
+
+    public:
+      static const target_type static_type;
+      virtual const target_type& dynamic_type () const {return static_type;}
+    };
+
+    // This one we define in cc but the target type is only registered by the
+    // c module. This way we can implement rule chaining without jumping
+    // through too many hoops (like resolving target type dynamically) but
+    // also without relaxing things too much (i.e., the user still won't be
+    // able to refer to c{} without loading the c module).
+    //
+    class LIBBUILD2_CC_SYMEXPORT c: public cc
+    {
+    public:
+      using cc::cc;
+
+    public:
+      static const target_type static_type;
+      virtual const target_type& dynamic_type () const {return static_type;}
+    };
+
+    // pkg-config file targets.
+    //
+    class LIBBUILD2_CC_SYMEXPORT pc: public file
+    {
+    public:
+      using file::file;
+
+    public:
+      static const target_type static_type;
+    };
+
+    class LIBBUILD2_CC_SYMEXPORT pca: public pc // .static.pc
+    {
+    public:
+      using pc::pc;
+
+    public:
+      static const target_type static_type;
+      virtual const target_type& dynamic_type () const {return static_type;}
+    };
+
+    class LIBBUILD2_CC_SYMEXPORT pcs: public pc // .shared.pc
+    {
+    public:
+      using pc::pc;
+
+    public:
+      static const target_type static_type;
+      virtual const target_type& dynamic_type () const {return static_type;}
+    };
+  }
+}
+
+#endif // LIBBUILD2_CC_TARGET_HXX