Revamp the build system.

Quick summary of changes:

  - Move list of cairo source files out of src/Makefile.am and into
    src/Sources.mk,

  - Generate files src/Config.mk and src/Config.mk.win32 that choose
    the right set of source files and headers based on configured
    backends and features.  This drastically simplifies building
    using other build systems.  The src/Makefile.win32 file needs
    to be updated to reflect these changes.

  - Add README files to various directories,

  - Add toplevel HACKING file.

3 files changed, 44 insertions, 75 deletions

diff --git a/doc/public/Headers.mk b/doc/public/Headers.mk
deleted file mode 100644
index 7b9edff1..00000000
--- a/doc/public/Headers.mk
+++ /dev/null
@@ -1,52 +0,0 @@
-PRIVATE_TEST_HFILES = \
-	cairo-analysis-surface-private.h \
-	cairo-arc-private.h \
-	cairo-atomic-private.h \
-	cairo-cache-private.h \
-	cairo-clip-private.h \
-	cairo-compiler-private.h \
-	cairo-fixed-private.h \
-	cairo-fixed-type-private.h \
-	cairo-freelist-private.h \
-	cairo-ft-private.h \
-	cairo-glitz-private.h \
-	cairo-gstate-private.h \
-	cairo-hash-private.h \
-	cairo-malloc-private.h \
-	cairo-meta-surface-private.h \
-	cairo-mutex-impl-private.h \
-	cairo-mutex-list-private.h \
-	cairo-mutex-private.h \
-	cairo-mutex-type-private.h \
-	cairo-os2-private.h \
-	cairo-output-stream-private.h \
-	cairo-paginated-private.h \
-	cairo-paginated-surface-private.h \
-	cairo-path-fixed-private.h \
-	cairo-path-private.h \
-	cairo-pdf-operators-private.h \
-	cairo-pdf-surface-private.h \
-	cairo-private.h \
-	cairo-ps-surface-private.h \
-	cairo-quartz-private.h \
-	cairo-reference-count-private.h \
-	cairo-region-private.h \
-	cairo-scaled-font-private.h \
-	cairo-scaled-font-subsets-private.h \
-	cairo-skiplist-private.h \
-	cairo-surface-fallback-private.h \
-	cairo-surface-private.h \
-	cairo-svg-surface-private.h \
-	cairo-truetype-subset-private.h \
-	cairo-type1-private.h \
-	cairo-type3-glyph-surface-private.h \
-	cairo-types-private.h \
-	cairo-user-font-private.h \
-	cairo-wideint-private.h \
-	cairo-wideint-type-private.h \
-	cairo-win32-private.h \
-	cairo-xlib-private.h \
-	cairo-xlib-surface-private.h \
-	cairo-xlib-xrender-private.h \
-	cairo-features-win32.h \
-	cairoint.h
diff --git a/doc/public/Makefile.am b/doc/public/Makefile.am
index 2bab45b2..2b6af97b 100644
--- a/doc/public/Makefile.am
+++ b/doc/public/Makefile.am
@@ -16,31 +16,15 @@ DOC_SOURCE_DIR=../../src
 HFILE_GLOB=$(top_srcdir)/src/cairo-*.h
 CFILE_GLOB=$(top_srcdir)/src/cairo-*.c $(top_srcdir)/src/cairo-*.h
 
-include $(srcdir)/Headers.mk
-
-UNSUPPORTED_HFILES=		\
-	cairo-atsui.h		\
-	cairo-beos.h		\
-	cairo-directfb.h	\
-	cairo-glitz.h		\
-	cairo-os2.h		\
-	cairo-xcb.h		\
-	cairo-xcb-xrender.h
+include $(top_srcdir)/src/Config.mk
 
 # Headers to ignore
-IGNORE_HFILES=					\
-	$(PRIVATE_TEST_HFILES)			\
-	$(UNSUPPORTED_HFILES)
-
-Headers.mk:
-	( echo "PRIVATE_TEST_HFILES = \\"; \
-	find $(top_srcdir)/src \
-		-name '*-private.h' | \
-	sed 's@.*/@	@; s@$$@ \\@' | \
-	LANG=C sort; \
-	echo '	cairo-features-win32.h \'; \
-	echo '	cairoint.h' ) > $@.tmp
-	mv $@.tmp $@
+IGNORE_HFILES= \
+	cairo-features.h \
+	cairo-features-win32.h \
+	$(all_cairo_private) \
+	$(unsupported_cairo_headers) \
+	$(NULL)
 
 # CFLAGS and LDFLAGS for compiling scan program. Only needed
 # if $(DOC_MODULE).types is non-empty.
diff --git a/doc/public/README b/doc/public/README
new file mode 100644
index 00000000..f3d157b1
--- /dev/null
+++ b/doc/public/README
@@ -0,0 +1,37 @@
+Cairo Reference Documentation
+=============================
+
+The API documentation is generated using gtk-doc.
+
+
+Building
+--------
+
+The documentation is not built by default.  To build it you need to
+configure with gtk-doc enabled (--enable-gtk-doc), and run:
+
+	make doc
+
+
+Adding New API
+--------------
+
+When adding new symbols and macros to the public API, modify
+cairo-section.txt and add new symbols to the right place.
+
+When adding whole new features, you also need to modify cairo-docs.xml
+and add a new file under tmpl/.  Beware that the files are tmpl/ are
+both manually edited AND modified by gtk-doc, gathering documentation
+stub from source files.
+
+
+Tests
+-----
+
+There are some tests in this directory, ensuring proper documentation
+syntax as well as checking that all public symbols are fully documented.
+
+After adding any new API, just run:
+
+	make check
+