[builds] Necessary changes to make 'dlg' compile.

* autogen.sh (copy_submodule_files): New script to copy all the
necessary source and include files from `submodules/dlg` to
`src/dlg`.

* src/dlg/dlgwrap.c: New wrapper file for `src/dlg.c`.  It enables
the build of 'dlg' if the `FT_LOGGING` macro is defined.

* src/dlg/rules.mk: New sub-Makefile.

* builds/freetype.mk (DLG_DIR): New variable to include the
header files of the 'dlg' library.
(INCLUDES): Add `DLG_DIR`.
(FT_CFLAGS): Add `-std=c99' flag.
Include `src/dlg/rules.mk` file to build 'dlg' library.
(OBJ_S, OBJ_M): Add `DLG_OBJS_M` and `DLG_OBJS_S`.

* builds/toplevel.mk: For builds directly from the git repository
we need to copy files from `submodule/dlg` to `src/dlg`.

* include/freetype/config/ftoption.h, devel/ftoption.h (FT_LOGGING):
New macro to enable or disable the logging facility in FreeType.

1 files changed, 21 insertions, 0 deletions

diff --git a/autogen.sh b/autogen.sh
index 79c4e4e16..560804088 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -162,4 +162,25 @@ cd ../..
 
 chmod +x ./configure
 
+# Copy all necessary 'dlg' files.
+copy_submodule_files ()
+{
+  echo "Copying files from \`submodules/dlg' to \`src/dlg'"
+  mkdir src/dlg/dlg
+  cp $DLG_INC_DIR/dlg.h src/dlg/dlg
+  cp $DLG_INC_DIR/output.h src/dlg/dlg
+  cp $DLG_SRC_DIR/* src/dlg
+}
+
+DLG_INC_DIR=submodules/dlg/include/dlg
+DLG_SRC_DIR=submodules/dlg/src/dlg
+
+if ! test -d "$DLG_INC_DIR"; then
+  echo "Checking out submodule in \`submodules/dlg':"
+  git submodule init
+  git submodule update
+fi
+
+copy_submodule_files
+
 # EOF