From 9d767810e1e54eb9233854f0dbf1345a0b5be60f Mon Sep 17 00:00:00 2001 From: Stephen Kelly Date: Wed, 4 Feb 2015 22:04:18 +0100 Subject: Features: Populate CMAKE__STANDARD_DEFAULT only for supported compilers. If no compiler feature information is known for a given compiler version, do not set a language standard default either. The two settings must be recorded consistently. --- Modules/Compiler/AppleClang-C.cmake | 4 +++- Modules/Compiler/AppleClang-CXX.cmake | 4 +++- Modules/Compiler/Clang-CXX.cmake | 4 +++- Modules/Compiler/GNU-C.cmake | 2 +- Modules/Compiler/GNU-CXX.cmake | 4 +++- Modules/Compiler/MSVC-CXX.cmake | 7 +++++-- Modules/Compiler/SunPro-CXX.cmake | 4 +++- 7 files changed, 21 insertions(+), 8 deletions(-) diff --git a/Modules/Compiler/AppleClang-C.cmake b/Modules/Compiler/AppleClang-C.cmake index 00d2633..10454f6 100644 --- a/Modules/Compiler/AppleClang-C.cmake +++ b/Modules/Compiler/AppleClang-C.cmake @@ -12,7 +12,9 @@ if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.0) set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11") endif() -set(CMAKE_C_STANDARD_DEFAULT 99) +if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.0) + set(CMAKE_C_STANDARD_DEFAULT 99) +endif() macro(cmake_record_c_compile_features) macro(_get_appleclang_features std_version list) diff --git a/Modules/Compiler/AppleClang-CXX.cmake b/Modules/Compiler/AppleClang-CXX.cmake index 6d58be3..5194da4 100644 --- a/Modules/Compiler/AppleClang-CXX.cmake +++ b/Modules/Compiler/AppleClang-CXX.cmake @@ -19,7 +19,9 @@ if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1) set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y") endif() -set(CMAKE_CXX_STANDARD_DEFAULT 98) +if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.0) + set(CMAKE_CXX_STANDARD_DEFAULT 98) +endif() macro(cmake_record_cxx_compile_features) macro(_get_appleclang_features std_version list) diff --git a/Modules/Compiler/Clang-CXX.cmake b/Modules/Compiler/Clang-CXX.cmake index e07eace..84b2c74 100644 --- a/Modules/Compiler/Clang-CXX.cmake +++ b/Modules/Compiler/Clang-CXX.cmake @@ -31,7 +31,9 @@ elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4) set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y") endif() -set(CMAKE_CXX_STANDARD_DEFAULT 98) +if(UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4) + set(CMAKE_CXX_STANDARD_DEFAULT 98) +endif() macro(cmake_record_cxx_compile_features) macro(_get_clang_features std_version list) diff --git a/Modules/Compiler/GNU-C.cmake b/Modules/Compiler/GNU-C.cmake index fa97a94..89704e6 100644 --- a/Modules/Compiler/GNU-C.cmake +++ b/Modules/Compiler/GNU-C.cmake @@ -24,7 +24,7 @@ endif() if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0) set(CMAKE_C_STANDARD_DEFAULT 11) -else() +elseif(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4) set(CMAKE_C_STANDARD_DEFAULT 90) endif() diff --git a/Modules/Compiler/GNU-CXX.cmake b/Modules/Compiler/GNU-CXX.cmake index c471daf..86a31e4 100644 --- a/Modules/Compiler/GNU-CXX.cmake +++ b/Modules/Compiler/GNU-CXX.cmake @@ -34,7 +34,9 @@ elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8) set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y") endif() -set(CMAKE_CXX_STANDARD_DEFAULT 98) +if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4) + set(CMAKE_CXX_STANDARD_DEFAULT 98) +endif() macro(cmake_record_cxx_compile_features) macro(_get_gcc_features std_version list) diff --git a/Modules/Compiler/MSVC-CXX.cmake b/Modules/Compiler/MSVC-CXX.cmake index 962aaeb..82ce069 100644 --- a/Modules/Compiler/MSVC-CXX.cmake +++ b/Modules/Compiler/MSVC-CXX.cmake @@ -1,5 +1,8 @@ -# MSVC has no specific language level or flags to change it. -set(CMAKE_CXX_STANDARD_DEFAULT "") + +if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16.0) + # MSVC has no specific language level or flags to change it. + set(CMAKE_CXX_STANDARD_DEFAULT "") +endif() macro(cmake_record_cxx_compile_features) record_compiler_features(CXX "" CMAKE_CXX_COMPILE_FEATURES) diff --git a/Modules/Compiler/SunPro-CXX.cmake b/Modules/Compiler/SunPro-CXX.cmake index cb37713..c7bc734 100644 --- a/Modules/Compiler/SunPro-CXX.cmake +++ b/Modules/Compiler/SunPro-CXX.cmake @@ -37,7 +37,9 @@ if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13) set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=c++11") endif() -set(CMAKE_CXX_STANDARD_DEFAULT 98) +if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13) + set(CMAKE_CXX_STANDARD_DEFAULT 98) +endif() macro(cmake_record_cxx_compile_features) macro(_get_solaris_studio_features std_version list) -- cgit v0.12