Always build ctpp2c for the host and static.

We are using `ctpp2c` when building kiwix-lib to compile embedded resources.

As `ctpp2c` will be used in the host machine, it always need to be
compiled for the host (native).
But we still want tho ctpp2 library compiled for the target platform.
As we don't want handle the conflict between two dynamic lib with the same
name but for two different platforms, we build ctpp2c statically.

dependencies.py

@@ -143,12 +143,34 @@ class CTPP2(Dependency):
                    "ctpp2_mingw32.patch",
                    "ctpp2_dll_export_VMExecutable.patch",
                    "ctpp2_win_install_lib_in_lib_dir.patch",
-                   "ctpp2_iconv_support.patch"]
+                   "ctpp2_iconv_support.patch",
+                   "ctpp2_compile_ctpp2c_static.patch",
+                  ]
 
     class Builder(CMakeBuilder):
         configure_option = "-DMD5_SUPPORT=OFF"
 
 
+class CTPP2C(CTPP2):
+    name = "ctpp2c"
+    force_native_build = True
+
+    class Builder(CTPP2.Builder):
+        make_target = "ctpp2c"
+
+        @property
+        def build_path(self):
+            return super().build_path+"_native"
+
+        def _install(self, context):
+            context.try_skip(self.build_path)
+            command = "cp {ctpp2c}* {install_dir}".format(
+                ctpp2c=pj(self.build_path, 'ctpp2c'),
+                install_dir=pj(self.buildEnv.install_dir, 'bin')
+            )
+            self.buildEnv.run_command(command, self.build_path, context)
+
+
 class Pugixml(Dependency):
     name = "pugixml"
     version = "1.2"
@@ -272,7 +294,7 @@ class Kiwixlib(Dependency):
     def dependencies(self):
         base_dependencies = ["pugixml", "libzim", "zlib", "lzma"]
         if self.buildEnv.platform_info.build != 'android':
-            base_dependencies += ['ctpp2']
+            base_dependencies += ['ctpp2', 'ctpp2c']
         if self.buildEnv.platform_info.build != 'native':
             return base_dependencies + ["icu4c_cross-compile"]
         else:

patches/ctpp2_compile_ctpp2c_static.patch

@@ -0,0 +1,13 @@
+diff -u ctpp2-2.8.3/CMakeLists.txt ctpp2-2.8.3-static/CMakeLists.txt
+--- ctpp2-2.8.3/CMakeLists.txt	2017-07-12 11:53:28.656535071 +0200
++++ ctpp2-2.8.3-static/CMakeLists.txt	2017-07-12 11:52:15.358692988 +0200
+@@ -464,7 +464,8 @@
+ 
+ # CTPP Compiler
+ ADD_EXECUTABLE(ctpp2c                       tests/CTPP2Compiler.cpp)
+-TARGET_LINK_LIBRARIES(ctpp2c                ctpp2)
++TARGET_LINK_LIBRARIES(ctpp2c                ctpp2-static)
++TARGET_LINK_LIBRARIES(ctpp2c                "-static")
+ 
+ # CTPP2 Interpreter
+ ADD_EXECUTABLE(ctpp2i                       tests/CTPP2Interpreter.cpp)