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Allow different C/C++ standards when this is used as a subproject.

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Inspired by https://github.com/google/snappy/pull/85

PiperOrigin-RevId: 279649967
This commit is contained in:
Victor Costan 2019-11-10 18:03:43 -08:00 committed by Victor Costan
parent 41c8d83914
commit ed72a3496e
1 changed files with 14 additions and 8 deletions
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22
CMakeLists.txt
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@ -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)
# 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)
# 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_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)