From f197b1a1f1bbc0334310fb1c911327246767a1a3 Mon Sep 17 00:00:00 2001 From: listout Date: Thu, 18 Aug 2022 08:04:56 +1000 Subject: 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 --- build_files/cmake/have_features.cmake | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 build_files/cmake/have_features.cmake (limited to 'build_files') diff --git a/build_files/cmake/have_features.cmake b/build_files/cmake/have_features.cmake new file mode 100644 index 00000000000..dc3b61849ea --- /dev/null +++ b/build_files/cmake/have_features.cmake @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright 2022 Blender Foundation. All rights reserved. + +# 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() -- cgit v1.2.3