[CMake] 1 2.8.8 or later is required.
Perl 5.6.1 or later is required. On Windows, [Strawberry Perl] 2 and MSYS Perl have both been reported to work. If not found by CMake, it may be configured explicitly by setting
On Windows you currently must use [Ninja] 3 to build; on other platforms, it is not required, but recommended, because it makes builds faster.
If you need to build Ninja from source, then a recent version of [Python] 4 is required (Python 2.7.5 works).
On Windows only, [Yasm] 5 is required. If not found by CMake, it may be configured explicitly by setting
A C compiler is required. On Windows, MSVC 12 (Visual Studio 2013) or later with Platform SDK 8.1 or later are supported. Recent versions of GCC and Clang should work on non-Windows platforms, and maybe on Windows too.
[Go] 6 is required. If not found by CMake, the go executable may be configured explicitly by setting
Using Ninja (note the ‘N’ is capitalized in the cmake invocation):
mkdir build cd build cmake -GNinja .. ninja
Using Make (does not work on Windows):
mkdir build cd build cmake .. make
You usually don't need to run
cmake again after changing
CMakeLists.txt files because the build scripts will detect changes to them and rebuild themselves automatically.
Note that the default build flags in the top-level
CMakeLists.txt are for debugging—optimisation isn't enabled.
If you want to cross-compile then there is an example toolchain file for 32-bit Intel in
util/. Wipe out the build directory, recreate it and run
cmake like this:
cmake -DCMAKE_TOOLCHAIN_FILE=../util/32-bit-toolchain.cmake -GNinja ..
If you want to build as a shared library, pass
-DBUILD_SHARED_LIBS=1. On Windows, where functions need to be tagged with
dllimport when coming from a shared library, define
BORINGSSL_SHARED_LIBRARY in any code which
#includes the BoringSSL headers.
It's possible to build BoringSSL with the Android NDK using CMake. This has been tested with version 10d of the NDK.
Unpack the Android NDK somewhere and export
ANDROID_NDK to point to the directory. Clone https://github.com/taka-no-me/android-cmake into
util/. Then make a build directory as above and run CMake twice like this:
cmake -DANDROID_NATIVE_API_LEVEL=android-9 \ -DANDROID_ABI=armeabi-v7a \ -DCMAKE_TOOLCHAIN_FILE=../util/android-cmake/android.toolchain.cmake \ -DANDROID_NATIVE_API_LEVEL=16 \ -GNinja ..
Once you've run that twice, Ninja should produce Android-compatible binaries. You can replace
armeabi-v7a in the above with
arm64-v8a to build aarch64 binaries.
Versions of CMake since 3.0.2 have a bug in its Ninja generator that causes yasm to output warnings
yasm: warning: can open only one input file, only the last file will be processed
These warnings can be safely ignored. The cmake bug is http://www.cmake.org/Bug/view.php?id=15253.
CMake can generate Visual Studio projects, but the generated project files don't have steps for assembling the assembly language source files, so they currently cannot be used to build BoringSSL.