blender/build_files/cmake/have_features.cmake

# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright 2022 Blender Foundation

# This file is used to test the system for headers & symbols.
# Variables should use the `HAVE_` prefix.
# Defines should use the same name as the CMAKE variable.

include(CheckSymbolExists)

# Used for: `intern/guardedalloc/intern/mallocn_intern.h`.
# Function `malloc_stats` is only available on GLIBC,
# so check that before defining `HAVE_MALLOC_STATS`.
check_symbol_exists(malloc_stats "malloc.h" HAVE_MALLOC_STATS_H)

# Used for: `source/creator/creator_signals.c`.
# The function `feenableexcept` is not present non-GLIBC systems,
# hence we need to check if it's available in the `fenv.h` file.
set(HAVE_FEENABLEEXCEPT OFF)
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
  check_symbol_exists(feenableexcept "fenv.h" HAVE_FEENABLEEXCEPT)
endif()

# Used for: `source/blender/blenlib/intern/system.c`.
# `execinfo` is not available on non-GLIBC systems (at least not on MUSL-LIBC),
# so check the presence of the header before including it and using the it for back-trace.
set(HAVE_EXECINFO_H OFF)
if(NOT MSVC)
  include(CheckIncludeFiles)
  check_include_files("execinfo.h" HAVE_EXECINFO_H)
  if(HAVE_EXECINFO_H)
    add_definitions(-DHAVE_EXECINFO_H)
  endif()
endif()
CMake: support building with musl libc Instead of using macros like GLIBC we can use the CMake build systems internal functions to check if some header or functions are present on the running system's libc. Add ./build_files/cmake/have_features.cmake to add checks for platform features which can be used to set defines for source files that require them. Reviewed By: campbellbarton Ref D15696 2022-08-17 22:04:56 +00:00			`# SPDX-License-Identifier: GPL-2.0-or-later`
Remove "All Rights Reserved" from Blender Foundation copyright code The goal is to solve confusion of the "All rights reserved" for licensing code under an open-source license. The phrase "All rights reserved" comes from a historical convention that required this phrase for the copyright protection to apply. This convention is no longer relevant. However, even though the phrase has no meaning in establishing the copyright it has not lost meaning in terms of licensing. This change makes it so code under the Blender Foundation copyright does not use "all rights reserved". This is also how the GPL license itself states how to apply it to the source code: <one line to give the program's name and a brief idea of what it does.> Copyright (C) <year> <name of author> This program is free software ... This change does not change copyright notice in cases when the copyright is dual (BF and an author), or just an author of the code. It also does mot change copyright which is inherited from NaN Holding BV as it needs some further investigation about what is the proper way to handle it. 2023-02-22 09:16:42 +00:00			`# Copyright 2022 Blender Foundation`
CMake: support building with musl libc Instead of using macros like GLIBC we can use the CMake build systems internal functions to check if some header or functions are present on the running system's libc. Add ./build_files/cmake/have_features.cmake to add checks for platform features which can be used to set defines for source files that require them. Reviewed By: campbellbarton Ref D15696 2022-08-17 22:04:56 +00:00
			`# This file is used to test the system for headers & symbols.`
			# Variables should use the `HAVE_` prefix.
			`# Defines should use the same name as the CMAKE variable.`

			`include(CheckSymbolExists)`

			# Used for: `intern/guardedalloc/intern/mallocn_intern.h`.
			# Function `malloc_stats` is only available on GLIBC,
			# so check that before defining `HAVE_MALLOC_STATS`.
			`check_symbol_exists(malloc_stats "malloc.h" HAVE_MALLOC_STATS_H)`

			# Used for: `source/creator/creator_signals.c`.
			# The function `feenableexcept` is not present non-GLIBC systems,
			# hence we need to check if it's available in the `fenv.h` file.
			`set(HAVE_FEENABLEEXCEPT OFF)`
			`if(CMAKE_SYSTEM_NAME STREQUAL "Linux")`
			`check_symbol_exists(feenableexcept "fenv.h" HAVE_FEENABLEEXCEPT)`
			`endif()`

			# Used for: `source/blender/blenlib/intern/system.c`.
			# `execinfo` is not available on non-GLIBC systems (at least not on MUSL-LIBC),
Cleanup: cmake formatting 2022-12-17 02:30:07 +00:00			`# so check the presence of the header before including it and using the it for back-trace.`
CMake: support building with musl libc Instead of using macros like GLIBC we can use the CMake build systems internal functions to check if some header or functions are present on the running system's libc. Add ./build_files/cmake/have_features.cmake to add checks for platform features which can be used to set defines for source files that require them. Reviewed By: campbellbarton Ref D15696 2022-08-17 22:04:56 +00:00			`set(HAVE_EXECINFO_H OFF)`
			`if(NOT MSVC)`
			`include(CheckIncludeFiles)`
			`check_include_files("execinfo.h" HAVE_EXECINFO_H)`
			`if(HAVE_EXECINFO_H)`
			`add_definitions(-DHAVE_EXECINFO_H)`
			`endif()`
			`endif()`