From a4801674c5ca85e6ef3c1c82cadf951b3f438440 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= Date: Sat, 22 Feb 2020 18:15:47 +0100 Subject: [PATCH] SCons: Bump required C++ standard to C++17 As per #36436, we now need C++17's guaranteed copy elision feature to solve ambiguities in Variant. Core developers discussed the idea to move from C++14 to C++17 as our minimum required C++ standard, and all agreed. Note that this doesn't mean that Godot is going to be written in "modern C++", but we'll use modern features where they make sense to simplify our "C with classes" codebase. Apart from new code written recently, most of the codebase still has to be ported to use newer features where relevant. Proper support for C++17 means that we need recent compiler versions: - GCC 7+ - Clang 6+ - VS 2017 15.7+ Additionally, C++17's `std::shared_mutex` (conditionally used by `vk_mem_alloc.h` when C++17 support is enabled) is only available in macOS 10.12+, so we increase our minimum supported version. --- SConstruct | 10 +++++----- misc/dist/osx_template.app/Contents/Info.plist | 6 +++--- misc/dist/osx_tools.app/Contents/Info.plist | 4 ++-- platform/osx/detect.py | 4 ++-- 4 files changed, 12 insertions(+), 12 deletions(-) diff --git a/SConstruct b/SConstruct index 785686d4285..eb59db006da 100644 --- a/SConstruct +++ b/SConstruct @@ -310,17 +310,17 @@ if selected_platform in platform_list: env.Append(LINKFLAGS=str(LINKFLAGS).split()) # Set our C and C++ standard requirements. - # Prepending to make it possible to override + # C++17 is required as we need guaranteed copy elision as per GH-36436. + # Prepending to make it possible to override. if not env.msvc: # Specifying GNU extensions support explicitly, which are supported by - # both GCC and Clang. This mirrors GCC and Clang's current default - # compile flags if no -std is specified. + # both GCC and Clang. Both currently default to gnu11 and gnu++14. env.Prepend(CFLAGS=['-std=gnu11']) - env.Prepend(CXXFLAGS=['-std=gnu++14']) + env.Prepend(CXXFLAGS=['-std=gnu++17']) else: # MSVC doesn't have clear C standard support, /std only covers C++. # We apply it to CCFLAGS (both C and C++ code) in case it impacts C features. - env.Prepend(CCFLAGS=['/std:c++14', '/permissive-']) + env.Prepend(CCFLAGS=['/std:c++17', '/permissive-']) # Platform specific flags flag_list = platform_flags[selected_platform] diff --git a/misc/dist/osx_template.app/Contents/Info.plist b/misc/dist/osx_template.app/Contents/Info.plist index 696c825594a..3b765e6bb80 100755 --- a/misc/dist/osx_template.app/Contents/Info.plist +++ b/misc/dist/osx_template.app/Contents/Info.plist @@ -31,13 +31,13 @@ NSHumanReadableCopyright $copyright LSMinimumSystemVersion - 10.9.0 + 10.12.0 LSMinimumSystemVersionByArchitecture x86_64 - 10.9.0 + 10.12.0 NSHighResolutionCapable $highres - \ No newline at end of file + diff --git a/misc/dist/osx_tools.app/Contents/Info.plist b/misc/dist/osx_tools.app/Contents/Info.plist index 46550ba6c7f..c519a232c4c 100755 --- a/misc/dist/osx_tools.app/Contents/Info.plist +++ b/misc/dist/osx_tools.app/Contents/Info.plist @@ -33,11 +33,11 @@ NSHumanReadableCopyright © 2007-2020 Juan Linietsky, Ariel Manzur & Godot Engine contributors LSMinimumSystemVersion - 10.9.0 + 10.12.0 LSMinimumSystemVersionByArchitecture x86_64 - 10.9.0 + 10.12.0 NSHighResolutionCapable diff --git a/platform/osx/detect.py b/platform/osx/detect.py index 0b164a2c56b..12ca5c10dce 100644 --- a/platform/osx/detect.py +++ b/platform/osx/detect.py @@ -164,5 +164,5 @@ def configure(env): #env.Append(CPPDEFINES=['GLES_ENABLED', 'OPENGL_ENABLED']) - env.Append(CCFLAGS=['-mmacosx-version-min=10.11']) - env.Append(LINKFLAGS=['-mmacosx-version-min=10.11']) + env.Append(CCFLAGS=['-mmacosx-version-min=10.12']) + env.Append(LINKFLAGS=['-mmacosx-version-min=10.12'])