[SCons] Move platform configuration to cmake tool.

1 files changed, 58 insertions, 1 deletions

diff --git a/tools/cmake.py b/tools/cmake.py
index 2362312..d552da6 100644
--- a/tools/cmake.py
+++ b/tools/cmake.py
@@ -1,3 +1,6 @@
+import os
+
+
 def exists(env):
     return True
 
@@ -5,6 +8,7 @@ def exists(env):
 def generate(env):
     env.AddMethod(cmake_configure, "CMakeConfigure")
     env.AddMethod(cmake_build, "CMakeBuild")
+    env.AddMethod(cmake_platform_flags, "CMakePlatformFlags")
 
 
 def cmake_configure(env, source, target, opt_args):
@@ -22,5 +26,58 @@ def cmake_configure(env, source, target, opt_args):
 
 def cmake_build(env, source, target=""):
     jobs = env.GetOption("num_jobs")
-    env = env.Clone()
     return env.Execute("cmake --build %s %s -j%s" % (source, "-t %s" % target if target else "", jobs))
+
+
+def cmake_platform_flags(env, config=None):
+    if config is None:
+        config = {}
+
+    if "CC" in env:
+        config["CMAKE_C_COMPILER"] = env["CC"]
+    if "CXX" in env:
+        config["CMAKE_CXX_COMPILER"] = env["CXX"]
+
+    if env["platform"] == "android":
+        api = env["android_api_level"]
+        abi = {
+            "arm64": "arm64-v8a",
+            "arm32": "armeabi-v7a",
+            "x86_32": "x86",
+            "x86_64": "x86_64",
+        }[env["arch"]]
+        config["CMAKE_SYSTEM_NAME"] = "Android"
+        config["CMAKE_SYSTEM_VERSION"] = api
+        config["CMAKE_ANDROID_ARCH_ABI"] = abi
+        config["ANDROID_ABI"] = abi
+        config["CMAKE_TOOLCHAIN_FILE"] = "%s/build/cmake/android.toolchain.cmake" % os.environ.get(
+            "ANDROID_NDK_ROOT", ""
+        )
+        config["CMAKE_ANDROID_STL_TYPE"] = "c++_static"
+
+    elif env["platform"] == "linux":
+        march = "-m32" if env["arch"] == "x86_32" else "-m64"
+        config["CMAKE_C_FLAGS"] = march
+        config["CMAKE_CXX_FLAGS"] = march
+
+    elif env["platform"] == "macos":
+        if env["arch"] == "universal":
+            raise ValueError("OSX architecture not supported: %s" % env["arch"])
+        config["CMAKE_OSX_ARCHITECTURES"] = env["arch"]
+        if env["macos_deployment_target"] != "default":
+            config["CMAKE_OSX_DEPLOYMENT_TARGET"] = env["macos_deployment_target"]
+
+    elif env["platform"] == "ios":
+        if env["arch"] == "universal":
+            raise ValueError("iOS architecture not supported: %s" % env["arch"])
+        config["CMAKE_SYSTEM_NAME"] = "iOS"
+        config["CMAKE_OSX_ARCHITECTURES"] = env["arch"]
+        if env["ios_min_version"] != "default":
+            config["CMAKE_OSX_DEPLOYMENT_TARGET"] = env["ios_min_version"]
+        if env["ios_simulator"]:
+            config["CMAKE_OSX_SYSROOT"] = "iphonesimulator"
+
+    elif env["platform"] == "windows":
+        config["CMAKE_SYSTEM_NAME"] = "Windows"
+
+    return config