Autogenerate the CMake build
Adds a GNUMakefile that will generate the cmake files based upon the
android makefiles. This will make it easier to keep the makefiles in
sync. If the makefiles change, we will have to run make in this
directory.
It relies on the following:
- The android.mk files are using the emugl dependency mechanism
- You are in the emulator repo (as we need the emulator build.mk files)
- We translate the emugl -> json representation.
- We write the json representation to disk
- We have a python script that transforms the json to cmake
It is all driven by GNUmake, so all you have to do is type make to
regenerate the files. SOONG does not use GNUMakefiles so we should be
able to co-exist.
Change-Id: I6f9ae22397bcf9987699b946aa14921b00fc94b0
diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 0000000..0610f29
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,60 @@
+# Copyright 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Check that we have at least GNU Make 3.81
+# We do this by detecting whether 'lastword' is supported
+#
+MAKE_TEST := $(lastword a b c d e f)
+ifneq ($(MAKE_TEST),f)
+ $(error,This build system requires GNU Make 3.81 or higher to run !)
+endif
+
+# Find the source installation path, should be this file's location.
+_BUILD_ROOT := $(dir $(lastword $(MAKEFILE_LIST)))
+_BUILD_ROOT := $(_BUILD_ROOT:%/=%)
+
+# Complain if the path contains spaces
+ifneq ($(words $(_BUILD_ROOT)),1)
+ $(info,The source installation path contains spaces: '$(_BUILD_ROOT)')
+ $(error,Please fix the problem by reinstalling to a different location.)
+endif
+
+# We are going to generate a JSON representation from the build
+GOLDFISH_OPENGL_BUILD_FOR_HOST := true
+CMAKE_GENERATE := true
+_BUILD_CORE_DIR := ../../../external/qemu/android/build
+
+# We need the emulator's android makefile defs, so we can understand
+# the makefiles.
+include $(_BUILD_CORE_DIR)/emulator/definitions.make
+
+# We need the ability to dump json.
+include $(_BUILD_ROOT)/json-dump.mk
+
+# And we are going to build like we are an emulator host.
+include $(_BUILD_ROOT)/common.mk
+include $(_BUILD_ROOT)/Android.mk
+
+JSON_FILE := /tmp/build.json
+JSON_DUMP := [ "" $(JSON_DUMP) ]
+
+# And we are going to transform our generated json list into a set of
+# cmake files.
+
+# This is the first target, so also the default target
+cmake:
+ @rm -f $(JSON_FILE)
+ $(call write-to-file,$(JSON_FILE),30,$(JSON_DUMP))
+ $(hide) python cmake_transform.py -i $(JSON_FILE) -c $(JSON_FILE) -o ${_BUILD_ROOT}
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