CMake: Support building HarfBuzz-GObject
This adds support to the CMake build files to support building
HarfBuzz-GObject, which is actually a little bit complicated,
as we need to:
-Run glib-mkenums, which is a Python (for newer GLib/GObject) or PERL
(for older, pre 2.53.4, GLib/GObject) script. This matters more for
Visual Studio builds as shebang lines are not supported, so we need to
test-run it with PERL or Python to determine which is the correct
interpretor to use.
-Next, we need to replace strings in the sources that we obtain from
running glib-mkenums. So, the solution here is to use a small utility
CMake script for our purposes here, to maintain maximum compatibility.
-Ensure that things do work in the Visual Studio IDE builds.
diff --git a/replace-enum-strings.cmake b/replace-enum-strings.cmake
new file mode 100644
index 0000000..42fdbff
--- /dev/null
+++ b/replace-enum-strings.cmake
@@ -0,0 +1,21 @@
+# CMake script to replace items
+# in sources generated by glib-mkenums
+
+FILE(READ ${ENUM_INPUT_SRC} enum_in)
+
+STRING(REPLACE
+ "_t_get_type"
+ "_get_type"
+ enum_out_tmp
+ "${enum_in}"
+ )
+
+STRING(REPLACE
+ "_T ("
+ " ("
+ enum_out
+ "${enum_out_tmp}"
+ )
+
+FILE(WRITE ${ENUM_OUTPUT_SRC} "${enum_out}")
+FILE(REMOVE ${ENUM_INPUT_SRC})
\ No newline at end of file
