cmake: add android runtime build caches

These cache files allow building the runtime via cross-compilation for
Android ARMv7 and AArch64.

Author: compnerd

cmake/caches/Runtime-Android-aarch64.cmake

@@ -0,0 +1,27 @@
+
+set(SWIFT_HOST_VARIANT_SDK ANDROID CACHE STRING "")
+set(SWIFT_HOST_VARIANT_ARCH aarch64 CACHE STRING "")
+
+# NOTE(compnerd) disable the tools, we are trying to build just the standard
+# library.
+set(SWIFT_INCLUDE_TOOLS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build tests since the tests require the toolchain
+set(SWIFT_INCLUDE_TESTS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build docs since that requires perl
+set(SWIFT_INCLUDE_DOCS NO CACHE BOOL "")
+
+# NOTE(compnerd) these are part of the toolchain, not the runtime.
+set(SWIFT_BUILD_SYNTAXPARSERLIB NO CACHE BOOL "")
+set(SWIFT_BUILD_SOURCEKIT NO CACHE BOOL "")
+
+# NOTE(compnerd) build with the compiler specified, not a just built compiler.
+set(SWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER YES CACHE BOOL "")
+
+set(SWIFT_SDK_ANDROID_ARCHITECTURES aarch64 CACHE STRING "")
+
+# NOTE(compnerd) this is lollipop, which seems to still have decent usage.
+set(SWIFT_ANDROID_API_LEVEL 21 CACHE STRING "")
+# NOTE(compnerd) this matches the value from the NDK r24.
+set(SWIFT_ANDROID_NDK_CLANG_VERSION 14.0.1 CACHE STRING "" FORCE)

cmake/caches/Runtime-Android-armv7.cmake

@@ -0,0 +1,28 @@
+
+set(SWIFT_HOST_VARIANT_SDK ANDROID CACHE STRING "")
+set(SWIFT_HOST_VARIANT_ARCH armv7 CACHE STRING "")
+
+# NOTE(compnerd) disable the tools, we are trying to build just the standard
+# library.
+set(SWIFT_INCLUDE_TOOLS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build tests since the tests require the toolchain
+set(SWIFT_INCLUDE_TESTS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build docs since that requires perl
+set(SWIFT_INCLUDE_DOCS NO CACHE BOOL "")
+
+# NOTE(compnerd) these are part of the toolchain, not the runtime.
+set(SWIFT_BUILD_SYNTAXPARSERLIB NO CACHE BOOL "")
+set(SWIFT_BUILD_SOURCEKIT NO CACHE BOOL "")
+
+# NOTE(compnerd) build with the compiler specified, not a just built compiler.
+set(SWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER YES CACHE BOOL "")
+
+set(SWIFT_SDK_ANDROID_ARCHITECTURES armv7 CACHE STRING "")
+
+# NOTE(compnerd) this is lollipop, which seems to still have decent usage.
+set(SWIFT_ANDROID_API_LEVEL 21 CACHE STRING "")
+# NOTE(compnerd) this matches the value from the NDK r24.
+set(SWIFT_ANDROID_NDK_CLANG_VERSION 14.0.1 CACHE STRING "" FORCE)
+