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Android: Detect and save the API level 

Store the Android API level in CMAKE_SYSTEM_VERSION.  If it is not
provided by the user, initialize it from CMAKE_ANDROID_API or fall back
to finding the latest available in the NDK.
This commit is contained in:
Brad King 2016-06-02 11:26:32 -04:00
parent 52b6effd81
commit fde59c4d88
1 changed files with 48 additions and 0 deletions
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48
Modules/Platform/Android-Determine.cmake
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@ -42,7 +42,55 @@ if(NOT CMAKE_ANDROID_NDK)
message(FATAL_ERROR "Android: The NDK root directory was not found.") message(FATAL_ERROR "Android: The NDK root directory was not found.")
endif() endif()
# Select an API.
if(CMAKE_SYSTEM_VERSION)
set(_ANDROID_API_VAR CMAKE_SYSTEM_VERSION)
elseif(CMAKE_ANDROID_API)
set(CMAKE_SYSTEM_VERSION "${CMAKE_ANDROID_API}")
set(_ANDROID_API_VAR CMAKE_ANDROID_API)
endif()
if(CMAKE_SYSTEM_VERSION)
if(CMAKE_ANDROID_API AND NOT "x${CMAKE_ANDROID_API}" STREQUAL "x${CMAKE_SYSTEM_VERSION}")
message(FATAL_ERROR
"Android: The API specified by CMAKE_ANDROID_API='${CMAKE_ANDROID_API}' is not consistent with CMAKE_SYSTEM_VERSION='${CMAKE_SYSTEM_VERSION}'."
)
endif()
if(CMAKE_ANDROID_NDK AND NOT IS_DIRECTORY "${CMAKE_ANDROID_NDK}/platforms/android-${CMAKE_SYSTEM_VERSION}")
message(FATAL_ERROR
"Android: The API specified by ${_ANDROID_API_VAR}='${${_ANDROID_API_VAR}}' does not exist in the NDK. "
"The directory:\n"
" ${CMAKE_ANDROID_NDK}/platforms/android-${CMAKE_SYSTEM_VERSION}\n"
"does not exist."
)
endif()
elseif(CMAKE_ANDROID_NDK)
file(GLOB _ANDROID_APIS_1 RELATIVE "${CMAKE_ANDROID_NDK}/platforms" "${CMAKE_ANDROID_NDK}/platforms/android-[0-9]")
file(GLOB _ANDROID_APIS_2 RELATIVE "${CMAKE_ANDROID_NDK}/platforms" "${CMAKE_ANDROID_NDK}/platforms/android-[0-9][0-9]")
list(SORT _ANDROID_APIS_1)
list(SORT _ANDROID_APIS_2)
set(_ANDROID_APIS ${_ANDROID_APIS_1} ${_ANDROID_APIS_2})
unset(_ANDROID_APIS_1)
unset(_ANDROID_APIS_2)
if(_ANDROID_APIS STREQUAL "")
message(FATAL_ERROR
"Android: No APIs found in the NDK. No\n"
" ${CMAKE_ANDROID_NDK}/platforms/android-*\n"
"directories exist."
)
endif()
string(REPLACE "android-" "" _ANDROID_APIS "${_ANDROID_APIS}")
list(REVERSE _ANDROID_APIS)
list(GET _ANDROID_APIS 0 CMAKE_SYSTEM_VERSION)
unset(_ANDROID_APIS)
endif()
if(NOT CMAKE_SYSTEM_VERSION MATCHES "^[0-9]+$")
message(FATAL_ERROR "Android: The API specified by CMAKE_SYSTEM_VERSION='${CMAKE_SYSTEM_VERSION}' is not an integer.")
endif()
# Save the Android-specific information in CMakeSystem.cmake. # Save the Android-specific information in CMakeSystem.cmake.
set(CMAKE_SYSTEM_CUSTOM_CODE " set(CMAKE_SYSTEM_CUSTOM_CODE "
set(CMAKE_ANDROID_NDK \"${CMAKE_ANDROID_NDK}\") set(CMAKE_ANDROID_NDK \"${CMAKE_ANDROID_NDK}\")
") ")
# Report the chosen architecture.
message(STATUS "Android: Targeting API '${CMAKE_SYSTEM_VERSION}'")