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https://github.com/mumble-voip/mumble.git
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ff40c92ab4
Using a unity build tends to create large source files. With that it is easily possible to hit the object file's size limit resulting in the "C1128: number of sections exceeded object file format limit" (MSVC) or "File too big" (GCC) error. In order to avoid this, this commit sets the necessary flag to extend that limit.
140 lines
3.5 KiB
CMake
140 lines
3.5 KiB
CMake
# Copyright 2020-2021 The Mumble Developers. All rights reserved.
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# Use of this source code is governed by a BSD-style license
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# that can be found in the LICENSE file at the root of the
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# Mumble source tree or at <https://www.mumble.info/LICENSE>.
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include(CheckCXXCompilerFlag)
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if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
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set(64_BIT TRUE)
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elseif(${CMAKE_SIZEOF_VOID_P} EQUAL 4)
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set(32_BIT TRUE)
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else()
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message(FATAL_ERROR "Unknown architecture - only 32bit and 64bit are supported")
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endif()
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set(CMAKE_POSITION_INDEPENDENT_CODE ON)
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if(WIN32)
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message(STATUS "Using Win7 as the oldest supported Windows version")
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add_compile_definitions(_WIN32_WINNT=0x0601)
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endif()
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if(MSVC)
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add_compile_options(
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"$<$<CONFIG:Release>:/Ox>"
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"$<$<CONFIG:Release>:/fp:fast>"
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)
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# Needed in order to not run into C1128: number of sections exceeded object file format limit
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add_compile_options(/bigobj)
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if(32_BIT)
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# SSE2 code is generated by default, unless an explicit arch is set.
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# Our 32 bit binaries should not contain any SSE2 code, so override the default.
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add_compile_options("-arch:SSE")
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endif()
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if(symbols)
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# Configure build to be able to properly debug release builds (https://docs.microsoft.com/cpp/build/how-to-debug-a-release-build).
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# This includes explicitely disabling /Oy to help debugging (https://docs.microsoft.com/cpp/build/reference/oy-frame-pointer-omission).
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# Also set /Zo to enhance optimized debugging (https://docs.microsoft.com/cpp/build/reference/zo-enhance-optimized-debugging).
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add_compile_options(
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"/GR"
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"/Zi"
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"/Zo"
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"/Oy-"
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)
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add_link_options(
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"/DEBUG"
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"/OPT:REF"
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"/OPT:ICF"
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"/INCREMENTAL:NO"
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# Ignore warnings about PDBs not being found (happens e.g. for vc140 as vcpkg's portfile doesn't install the PDB files)
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"/ignore:4099"
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)
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endif()
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if(warnings-as-errors)
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add_compile_options("/WX")
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add_link_options("/WX")
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endif()
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elseif(UNIX OR MINGW)
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add_compile_options(
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"-fvisibility=hidden"
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"-Wall"
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"-Wextra"
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)
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# Avoid "File too big" error
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check_cxx_compiler_flag("Wa,-mbig-obj" COMPILER_HAS_MBIG_OBJ)
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if (${COMPILER_HAS_MBIG_OBJ})
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add_compile_options("-Wa,-mbig-obj")
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endif()
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if(options)
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add_compile_options(
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"-O3"
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"-march=native"
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"-ffast-math"
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"-ftree-vectorize"
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)
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endif()
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if(warnings-as-errors)
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add_compile_options("-Werror")
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endif()
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if(APPLE)
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add_link_options("-Wl,-dead_strip")
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if(symbols)
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add_compile_options(
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"-gfull"
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"-gdwarf-2"
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)
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endif()
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else()
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if(NOT MINGW)
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add_link_options(
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"-Wl,-z,relro"
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"-Wl,-z,now"
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)
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endif()
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# Ensure _FORTIFY_SOURCE is not used in debug builds.
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#
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# First, ensure _FORTIFY_SOURCE is undefined.
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# Then -- and, only for release builds -- set _FORTIFY_SOURCE=2.
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#
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# We can't use _FORTIFY_SOURCE in debug builds (which are built with -O0) because _FORTIFY_SOURCE=1 requires -O1 and _FORTIFY_SOURCE=2 requires -O2.
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# Modern GLIBCs warn about this since https://sourceware.org/bugzilla/show_bug.cgi?id=13979.
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# In Mumble builds with warnings-as-errors, this will cause build failures.
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add_compile_options("-U_FORTIFY_SOURCE")
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if(NOT MINGW)
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add_compile_options($<$<CONFIG:Debug>:-fstack-protector>)
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endif()
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add_compile_options(
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$<$<NOT:$<CONFIG:Debug>>:-D_FORTIFY_SOURCE=2>
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)
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add_link_options(
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$<$<CONFIG:Debug>:-Wl,--no-add-needed>
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)
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if(symbols)
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add_compile_options("-g")
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endif()
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endif()
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endif()
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function(target_disable_warnings TARGET)
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if(MSVC)
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target_compile_options(${TARGET} PRIVATE "/w")
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else()
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target_compile_options(${TARGET} PRIVATE "-w")
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endif()
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endfunction()
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