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| author | Victor Costan <costan@google.com> | 2019-11-10 18:03:43 -0800 |
|---|---|---|
| committer | Victor Costan <pwnall@chromium.org> | 2019-11-10 18:22:41 -0800 |
| commit | ed72a3496ed01e1c6a28f743258623a58f6867ee (patch) | |
| tree | 4b29389530136010e2a929c753c6c39d0080efba | |
| parent | 41c8d839149134a3a6c8908f185437f536a47211 (diff) | |
| download | leveldb-ed72a3496ed01e1c6a28f743258623a58f6867ee.tar.gz | |
Allow different C/C++ standards when this is used as a subproject.
Inspired by https://github.com/google/snappy/pull/85
PiperOrigin-RevId: 279649967
| -rw-r--r-- | CMakeLists.txt | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 2ad1c6c..e5c614c 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -6,15 +6,21 @@ cmake_minimum_required(VERSION 3.9) # Keep the version below in sync with the one in db.h project(leveldb VERSION 1.22.0 LANGUAGES C CXX) -# This project can use C11, but will gracefully decay down to C89. -set(CMAKE_C_STANDARD 11) -set(CMAKE_C_STANDARD_REQUIRED OFF) -set(CMAKE_C_EXTENSIONS OFF) - -# This project requires C++11. -set(CMAKE_CXX_STANDARD 11) -set(CMAKE_CXX_STANDARD_REQUIRED ON) -set(CMAKE_CXX_EXTENSIONS OFF) +# C standard can be overridden when this is used as a sub-project. +if(NOT CMAKE_C_STANDARD) + # This project can use C11, but will gracefully decay down to C89. + set(CMAKE_C_STANDARD 11) + set(CMAKE_C_STANDARD_REQUIRED OFF) + set(CMAKE_C_EXTENSIONS OFF) +endif(NOT CMAKE_C_STANDARD) + +# C++ standard can be overridden when this is used as a sub-project. +if(NOT CMAKE_CXX_STANDARD) + # This project requires C++11. + set(CMAKE_CXX_STANDARD 11) + set(CMAKE_CXX_STANDARD_REQUIRED ON) + set(CMAKE_CXX_EXTENSIONS OFF) +endif(NOT CMAKE_CXX_STANDARD) if (WIN32) set(LEVELDB_PLATFORM_NAME LEVELDB_PLATFORM_WINDOWS) |