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CMakeLists.txt
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# CMakeLists.txt
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
if(DEFINED ENV{FORCE_CMAKE_NINJA_NON_VERBOSE})
#
# Forcibly unset CMAKE_VERBOSE_MAKEFILE,
# to make *CERTAIN* that we don't do
# anything verbose here!
#
unset(CMAKE_VERBOSE_MAKEFILE CACHE)
endif()
# https://doc.qt.io/qt-6/cmake-supported-cmake-versions.html
cmake_minimum_required(VERSION 3.16)
if(POLICY CMP0135)
cmake_policy(SET CMP0135 NEW)
endif()
if(WIN32 AND NOT DEFINED ENV{MSYSTEM})
set(_project_name Wireshark)
set(_log_project_name Stratoshark)
else()
set(_project_name wireshark)
set(_log_project_name stratoshark)
endif()
project(${_project_name} C CXX)
if(WIN32)
set(_msystem False)
set(_repository False)
if(DEFINED ENV{MSYSTEM})
set(_msystem $ENV{MSYSTEM})
message(STATUS "Using MSYS2 with MSYSTEM=${_msystem}")
elseif(MSVC)
set(_repository True)
message(STATUS "Using 3rd party repository")
else()
# Neither own package repository nor MSYS2 repository.
endif()
set(USE_MSYSTEM ${_msystem} CACHE INTERNAL "Use MSYS2 subsystem")
set(HAVE_MSYSTEM ${USE_MSYSTEM}) # For config.h
set(USE_REPOSITORY ${_repository} CACHE INTERNAL "Use Wireshark 3rd Party Repository")
endif()
# Updated by tools/make-version.py
set(PROJECT_MAJOR_VERSION 4)
set(PROJECT_MINOR_VERSION 5)
set(PROJECT_PATCH_VERSION 0)
set(PROJECT_BUILD_VERSION 0)
set(PROJECT_VERSION_EXTENSION "")
if(DEFINED ENV{WIRESHARK_VERSION_EXTRA})
set(PROJECT_VERSION_EXTENSION "$ENV{WIRESHARK_VERSION_EXTRA}")
endif()
set(PROJECT_VERSION "${PROJECT_MAJOR_VERSION}.${PROJECT_MINOR_VERSION}.${PROJECT_PATCH_VERSION}${PROJECT_VERSION_EXTENSION}")
set(LOG_PROJECT_NAME ${_log_project_name})
set(LOG_PROJECT_MAJOR_VERSION 0)
set(LOG_PROJECT_MINOR_VERSION 9)
set(LOG_PROJECT_PATCH_VERSION 0)
set(LOG_PROJECT_VERSION "${LOG_PROJECT_MAJOR_VERSION}.${LOG_PROJECT_MINOR_VERSION}.${LOG_PROJECT_PATCH_VERSION}${PROJECT_VERSION_EXTENSION}")
include( CMakeOptions.txt )
# We require minimum C11
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
# We require minimum C++11
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
message(STATUS "Generating build using CMake ${CMAKE_VERSION}")
if(USE_MSYSTEM)
# Prevent FindPython3.cmake from using the Python path in the registry,
# only use the $PATH environment variable (which is set up for MSYS2).
set(Python3_FIND_REGISTRY NEVER)
endif()
find_package(Python3 3.6 REQUIRED)
# Set a default build type if none was specified
set(_default_build_type "RelWithDebInfo")
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
set(CMAKE_BUILD_TYPE "${_default_build_type}" CACHE STRING "Choose the type of build." FORCE)
# Set the possible values of build type for cmake-gui
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()
# Build type is ignored by multi-config generators.
if (NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "Using \"${CMAKE_GENERATOR}\" generator and build type \"${CMAKE_BUILD_TYPE}\"")
else()
message(STATUS "Using \"${CMAKE_GENERATOR}\" generator (multi-config)")
endif()
#Where to find local cmake scripts
set(WS_CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
set(CMAKE_MODULE_PATH ${WS_CMAKE_MODULE_PATH})
# CMake >= 3.9.0 supports LTO/IPO.
if (ENABLE_LTO)
include(CheckIPOSupported)
check_ipo_supported(RESULT lto_supported OUTPUT lto_output)
if(lto_supported)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
message(STATUS "LTO/IPO is enabled for Release configuration")
else()
message(STATUS "LTO/IPO requested but it is not supported by the compiler: ${lto_output}")
endif()
else()
message(STATUS "LTO/IPO is not enabled")
endif()
# If our target platform is enforced by our generator, set
# WIRESHARK_TARGET_PLATFORM accordingly. Otherwise use
# %WIRESHARK_TARGET_PLATFORM%.
if(WIN32)
if(DEFINED ENV{WIRESHARK_TARGET_PLATFORM})
string(TOLOWER $ENV{WIRESHARK_TARGET_PLATFORM} _target_platform)
set(WIRESHARK_TARGET_PLATFORM ${_target_platform})
elseif(USE_MSYSTEM MATCHES "MINGW64|CLANG64|UCRT64")
# https://www.msys2.org/docs/environments
# MSYS2 comes with different environments/subsystems and
# the first thing you have to decide is which one to use.
# The differences among the environments are mainly environment
# variables, default compilers/linkers, architecture,
# system libraries used etc. If you are unsure, go with UCRT64.
set(WIRESHARK_TARGET_PLATFORM x64)
elseif(USE_MSYSTEM)
if($ENV{MSYSTEM_CARCH} MATCHES "x86_64")
set(WIRESHARK_TARGET_PLATFORM x64)
elseif($ENV{MSYSTEM_CARCH} MATCHES "i686")
set(WIRESHARK_TARGET_PLATFORM win32)
elseif($ENV{MSYSTEM_CARCH} MATCHES "aarch64")
set(WIRESHARK_TARGET_PLATFORM "arm64")
else()
set(WIRESHARK_TARGET_PLATFORM "$ENV{MSYSTEM_CARCH}")
endif()
elseif($ENV{Platform} MATCHES arm64 OR CMAKE_GENERATOR_PLATFORM MATCHES arm64)
set(WIRESHARK_TARGET_PLATFORM arm64)
elseif(CMAKE_CL_64 OR CMAKE_GENERATOR MATCHES x64)
set(WIRESHARK_TARGET_PLATFORM x64)
else()
message(WARNING "Assuming \"x64\" target platform")
set(WIRESHARK_TARGET_PLATFORM x64)
endif()
if(WIRESHARK_TARGET_PLATFORM MATCHES "win32")
message(FATAL_ERROR "Deprecated target platform ${WIRESHARK_TARGET_PLATFORM}. See https://gitlab.com/wireshark/wireshark/-/issues/17779 for details.")
elseif(NOT (WIRESHARK_TARGET_PLATFORM MATCHES "x64" OR WIRESHARK_TARGET_PLATFORM MATCHES "arm64"))
message(FATAL_ERROR "Invalid target platform: ${WIRESHARK_TARGET_PLATFORM}")
endif()
# Sanity check
if(MSVC AND DEFINED ENV{PLATFORM})
string(TOLOWER $ENV{PLATFORM} _vs_platform)
if(
(_vs_platform STREQUAL "x64" AND NOT WIRESHARK_TARGET_PLATFORM STREQUAL "x64")
OR
(_vs_platform STREQUAL "arm64" AND NOT WIRESHARK_TARGET_PLATFORM STREQUAL "arm64")
)
message(FATAL_ERROR "The PLATFORM environment variable (${_vs_platform})"
" doesn't match the generator platform (${WIRESHARK_TARGET_PLATFORM})")
endif()
endif()
message(STATUS
"Building for ${WIRESHARK_TARGET_PLATFORM}"
)
if(NOT CMAKE_CROSSCOMPILING)
find_package(PowerShell REQUIRED)
endif()
# Determine where the 3rd party libraries will be
if(USE_REPOSITORY)
if( DEFINED ENV{WIRESHARK_LIB_DIR} )
# The buildbots set WIRESHARK_LIB_DIR but not WIRESHARK_BASE_DIR.
file( TO_CMAKE_PATH "$ENV{WIRESHARK_LIB_DIR}" _PROJECT_LIB_DIR )
elseif( DEFINED ENV{WIRESHARK_BASE_DIR} )
file( TO_CMAKE_PATH "$ENV{WIRESHARK_BASE_DIR}" _WS_BASE_DIR )
set( _PROJECT_LIB_DIR "${_WS_BASE_DIR}/wireshark-${WIRESHARK_TARGET_PLATFORM}-libs" )
else()
# Don't know what to do
message(FATAL_ERROR "Neither WIRESHARK_BASE_DIR or WIRESHARK_LIB_DIR are defined")
endif()
# Download third-party libraries
file (TO_NATIVE_PATH ${CMAKE_SOURCE_DIR}/tools/win-setup.ps1 _win_setup)
file (TO_NATIVE_PATH ${_PROJECT_LIB_DIR} _ws_lib_dir)
file (TO_NATIVE_PATH ${CMAKE_COMMAND} _win_cmake_command)
# Is it possible to have a one-time, non-cached option in CMake? If
# so, we could add a "-DFORCE_WIN_SETUP" which passes -Force to
# win-setup.ps1.
execute_process(
COMMAND ${POWERSHELL_COMMAND} "\"${_win_setup}\"" -Destination "${_ws_lib_dir}" -Platform ${WIRESHARK_TARGET_PLATFORM} -CMakeExecutable "\"${_win_cmake_command}\""
RESULT_VARIABLE _win_setup_failed
ERROR_VARIABLE _win_setup_error_output
)
if(_win_setup_failed)
message(FATAL_ERROR "Windows setup (win-setup.ps1) failed: ${_win_setup_error_output}.")
endif()
set(EXTRA_INSTALLER_DIR ${_ws_lib_dir})
# XXX Add a dependency on ${_ws_lib_dir}/current_tag.txt?
else()
set(EXTRA_INSTALLER_DIR ${CMAKE_BINARY_DIR}/packaging/nsis)
endif()
include(FetchContent)
set(LIBS_URL "https://dev-libs.wireshark.org/windows/packages")
file(TO_CMAKE_PATH ${EXTRA_INSTALLER_DIR} _file_download_dir)
# Download Npcap required by the Windows installer
set(NPCAP_VERSION "1.80")
set(NPCAP_SHA256 "ac4f26d7d9f994d6f04141b2266f02682def51af63c09c96a7268552c94a6535")
set(NPCAP_FILENAME "npcap-${NPCAP_VERSION}.exe")
set(NPCAP_URL "${LIBS_URL}/Npcap/${NPCAP_FILENAME}")
FetchContent_Declare(Npcap
URL ${NPCAP_URL}
DOWNLOAD_DIR ${_file_download_dir}
URL_HASH SHA256=${NPCAP_SHA256}
DOWNLOAD_NO_EXTRACT True
)
# Download USBPcap required by the Windows installer
set(USBPCAP_VERSION "1.5.4.0")
set(USBPCAP_SHA256 "87a7edf9bbbcf07b5f4373d9a192a6770d2ff3add7aa1e276e82e38582ccb622")
set(USBPCAP_FILENAME "USBPcapSetup-${USBPCAP_VERSION}.exe")
set(USBPCAP_URL "${LIBS_URL}/USBPcap/${USBPCAP_FILENAME}")
FetchContent_Declare(USBPcap
URL ${USBPCAP_URL}
DOWNLOAD_DIR ${_file_download_dir}
URL_HASH SHA256=${USBPCAP_SHA256}
DOWNLOAD_NO_EXTRACT True
)
endif(WIN32)
include(UseCustomIncludes)
ADD_CUSTOM_CMAKE_INCLUDE()
# Ensure that all executables and libraries end up in the same directory. Actual
# files might end up in a configuration subdirectory, e.g. run/Debug or
# run/Release. We try to set DATAFILE_DIR to actual location below.
if(NOT ARCHIVE_OUTPUT_PATH)
set(ARCHIVE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all archives.")
endif()
if(NOT EXECUTABLE_OUTPUT_PATH)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all executables.")
endif()
if(NOT LIBRARY_OUTPUT_PATH)
set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all libraries.")
endif()
#
# The release mode (CMAKE_BUILD_TYPE=release) defines NDEBUG for
# the Unix Makefile generator.
#
# Defines CMAKE_INSTALL_BINDIR, CMAKE_INSTALL_DATADIR, etc ...
if(WIN32 AND NOT USE_MSYSTEM)
# Override some values on Windows, to match the existing
# convention of installing everything to a single root folder.
set(CMAKE_INSTALL_BINDIR ".")
set(CMAKE_INSTALL_LIBDIR ".")
set(CMAKE_INSTALL_INCLUDEDIR "include")
set(CMAKE_INSTALL_DATADIR ".")
set(CMAKE_INSTALL_DOCDIR ".")
endif()
include(GNUInstallDirs)
set(PROJECT_INSTALL_INCLUDEDIR "${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}")
# Make sure our executables can load our libraries if we install into
# a non-default directory on Unix-like systems other than macOS.
# https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/RPATH-handling
set(LIBRARY_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}")
set(EXECUTABLE_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}")
set(EXTCAP_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}")
if(NOT (WIN32 OR APPLE OR USE_STATIC))
# Try to set a RPATH for installed binaries if the library directory is
# not already included in the default search list.
list(FIND CMAKE_C_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_FULL_LIBDIR}" IS_SYSTEM_DIR)
if(IS_SYSTEM_DIR EQUAL -1)
# Some systems support $ORIGIN in RPATH to enable relocatable
# binaries. In other cases, only absolute paths can be used.
# https://www.lekensteyn.nl/rpath.html
#
# Also note that some systems (notably those using GNU libc)
# silently ignore $ORIGIN in RPATH for binaries that are
# setuid root or use privileged capabilities.
#
if(CMAKE_SYSTEM_NAME MATCHES "^(Linux|SunOS|FreeBSD)$")
set(_enable_rpath_origin TRUE)
else()
set(_enable_rpath_origin FALSE)
endif()
# Provide a knob to optionally force absolute rpaths,
# to support old/buggy systems and as a user preference
# for hardening.
# XXX Should this be a CMake option?
set(ENABLE_RPATH_ORIGIN ${_enable_rpath_origin} CACHE BOOL
"Use $ORIGIN with INSTALL_RPATH")
mark_as_advanced(ENABLE_RPATH_ORIGIN)
if(ENABLE_RPATH_ORIGIN)
set(LIBRARY_INSTALL_RPATH "$ORIGIN")
set(EXECUTABLE_INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}")
set(EXTCAP_INSTALL_RPATH "$ORIGIN/../..")
else()
set(LIBRARY_INSTALL_RPATH "${CMAKE_INSTALL_FULL_LIBDIR}")
set(EXECUTABLE_INSTALL_RPATH "${CMAKE_INSTALL_FULL_LIBDIR}")
set(EXTCAP_INSTALL_RPATH "${CMAKE_INSTALL_FULL_LIBDIR}")
endif()
# Include non-standard external libraries by default in RPATH.
if(NOT DEFINED CMAKE_INSTALL_RPATH_USE_LINK_PATH)
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif()
endif()
endif()
# Ensure that executables in the build directory always have the same RPATH.
# This ensures relocatable binaries and reproducible builds (invariant of the
# build directory location). (Requires CMake 3.14)
set(CMAKE_BUILD_RPATH_USE_ORIGIN ON)
if(MSVC)
# Linking with wsetargv.obj enables "wildcard expansion" of
# command-line arguments.
set(WILDCARD_OBJ wsetargv.obj)
endif()
include(CheckSymbolExists)
#
# Large file support on UN*X, a/k/a LFS.
#
# On Windows, we require _fseeki64() and _ftelli64(). Visual
# Studio has had supported them since Visual Studio 2005/MSVCR80,
# and we require newer versions, so we know we have them.
#
if(NOT MSVC)
include(FindLFS)
if(LFS_FOUND)
#
# Add the required #defines.
#
add_definitions(${LFS_DEFINITIONS})
endif()
#
# Check for fseeko as well.
#
include(FindFseeko)
if(FSEEKO_FOUND)
set(HAVE_FSEEKO ON)
#
# Add the required #defines.
#
add_definitions(${FSEEKO_DEFINITIONS})
endif()
endif()
# Banner shown at top right of Qt welcome screen.
if(DEFINED ENV{WIRESHARK_VERSION_FLAVOR})
set(VERSION_FLAVOR "$ENV{WIRESHARK_VERSION_FLAVOR}")
else()
set(VERSION_FLAVOR "Development Build")
endif()
# Used in .rc files and manifests
set(MANIFEST_PROCESSOR_ARCHITECTURE ${WIRESHARK_TARGET_PLATFORM})
if (MANIFEST_PROCESSOR_ARCHITECTURE MATCHES "x64")
set(MANIFEST_PROCESSOR_ARCHITECTURE "amd64")
endif()
set(RC_VERSION ${PROJECT_MAJOR_VERSION},${PROJECT_MINOR_VERSION},${PROJECT_PATCH_VERSION},${PROJECT_BUILD_VERSION})
set(LOG_RC_VERSION ${LOG_PROJECT_MAJOR_VERSION},${LOG_PROJECT_MINOR_VERSION},${PROJECT_PATCH_VERSION},${PROJECT_BUILD_VERSION})
message(STATUS "V: ${PROJECT_VERSION}, MaV: ${PROJECT_MAJOR_VERSION}, MiV: ${PROJECT_MINOR_VERSION}, PL: ${PROJECT_PATCH_VERSION}, EV: ${PROJECT_VERSION_EXTENSION}.")
include(UseLemon)
include(UseMakePluginReg)
include(UseMakeTaps)
include(UseExecutableResources)
include(UseAsn2Wrs)
# The following snippet has been taken from
# https://github.com/USESystemEngineeringBV/cmake-eclipse-helper/wiki/HowToWorkaroundIndexer
# The eclipse indexer otherwise assumes __cplusplus=199711L which will lead to broken
# lookup tables for the epan libraries
# Check if CXX flags have been set to c++11 -> Setup Eclipse Indexer correctly!
# Also setup the project slightly different
if(CMAKE_EXTRA_GENERATOR MATCHES "Eclipse CDT4")
SET(CXX_ENABLED 0)
LIST(LENGTH CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS LIST_LEN)
if(LIST_LEN GREATER 0)
SET(CXX_ENABLED 1)
endif()
SET(C_ENABLED 0)
LIST(LENGTH CMAKE_EXTRA_GENERATOR_C_SYSTEM_DEFINED_MACROS LIST_LEN)
if(LIST_LEN GREATER 0)
SET(C_ENABLED 1)
endif()
if(C_ENABLED EQUAL 1 AND CXX_ENABLED EQUAL 1)
# Combined project (C and CXX). This will confuse the indexer. For that reason
# we unsert set the __cplusplus variable for the indexer
list(FIND CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS "__cplusplus" GEN_MACRO_INDEX)
if(GEN_MACRO_INDEX GREATER -1)
list(REMOVE_AT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${GEN_MACRO_INDEX})
list(REMOVE_AT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${GEN_MACRO_INDEX})
endif()
SET(CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS} CACHE INTERNAL "")
elseif((CXX_ENABLED EQUAL 1) AND (CMAKE_CXX_FLAGS MATCHES ".*-std=c\\+\\+11.*"))
#add_definitions (-D__cplusplus=201103L)
# CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS
list(FIND CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS "199711L" GEN_MACRO_INDEX)
if(GEN_MACRO_INDEX GREATER -1)
list(REMOVE_AT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${GEN_MACRO_INDEX})
list(INSERT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${GEN_MACRO_INDEX} "201103L")
SET(CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS ${CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS} CACHE INTERNAL "")
endif()
endif()
endif()
include_directories(
${CMAKE_BINARY_DIR}
${CMAKE_SOURCE_DIR}
${CMAKE_SOURCE_DIR}/include
)
if( DUMPCAP_INSTALL_OPTION STREQUAL "suid" )
set( DUMPCAP_SETUID "SETUID" )
else()
set( DUMPCAP_SETUID )
endif()
if( NOT CMAKE_SYSTEM_NAME STREQUAL "Linux" AND
DUMPCAP_INSTALL_OPTION STREQUAL "capabilities" )
message( WARNING "Capabilities are only supported on Linux" )
set( DUMPCAP_INSTALL_OPTION )
endif()
set(OSS_FUZZ OFF CACHE BOOL "Whether building for oss-fuzz")
mark_as_advanced(OSS_FUZZ)
if(OSS_FUZZ)
if(ENABLE_FUZZER)
# In oss-fuzz mode, the fuzzing engine can be afl or libFuzzer.
message(FATAL_ERROR "Cannot force libFuzzer when using oss-fuzz")
endif()
# Must not depend on external dependencies so statically link all libs.
set(USE_STATIC ON)
endif()
if(USE_STATIC)
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
endif()
#
# Linking can consume a lot of memory, especially when built with ASAN and
# static libraries (like oss-fuzz) or Debug mode. With Ninja, the number of
# parallel linker processes is constrained by job parallelism (-j), but this can
# be reduced further by setting "job pools" to a lower number.
#
if(CMAKE_MAKE_PROGRAM MATCHES "ninja" AND OSS_FUZZ)
# Assume oss-fuzz linker jobs do not require more than 1.2G per task
set(per_job_memory_mb 1200)
cmake_host_system_information(RESULT total_memory_mb QUERY TOTAL_PHYSICAL_MEMORY)
math(EXPR parallel_link_jobs "${total_memory_mb} / ${per_job_memory_mb}")
if(parallel_link_jobs LESS 1)
set(parallel_link_jobs 1)
endif()
set_property(GLOBAL APPEND PROPERTY JOB_POOLS link_job_pool=${parallel_link_jobs})
set(CMAKE_JOB_POOL_LINK link_job_pool)
message(STATUS "Ninja job pool size: ${parallel_link_jobs}")
endif()
# Always enable position-independent code when compiling, even for
# executables, so you can build position-independent executables.
# -pie is added below for non-MSVC, but requires objects to be built with
# -fPIC/-fPIE (so set CMAKE_POSITION_INDEPENDENT_CODE to enable that).
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
# Preprocessor definitions common to all compilers
set_property(DIRECTORY
PROPERTY COMPILE_DEFINITIONS
"G_DISABLE_DEPRECATED"
"G_DISABLE_SINGLE_INCLUDES"
$<$<OR:$<BOOL:${ENABLE_DEBUG}>,$<CONFIG:Debug>>:WS_DEBUG>
$<$<OR:$<AND:$<BOOL:${ENABLE_DEBUG}>,$<BOOL:${ENABLE_DEBUG_UTF_8}>>,$<CONFIG:Debug>>:WS_DEBUG_UTF_8>
$<$<BOOL:${ENABLE_ASSERT}>:ENABLE_ASSERT>
)
if(WIN32)
#
# NOTE: Because of the way Qt moc is including "config.h" (not as the
# first header) this *MUST* be defined on the command line to precede
# every included header and not trigger symbol redefinition errors.
#
add_definitions(
-DWIN32_LEAN_AND_MEAN
#
# Use Unicode in Windows runtime functions.
#
-DUNICODE
-D_UNICODE
#
# NOMINMAX keeps windows.h from defining "min" and "max" via windef.h.
# This avoids conflicts with the C++ standard library.
#
-DNOMINMAX
)
endif()
if(MINGW)
add_definitions(
#
# Enable POSIX APIs. This will switch stdio to ANSI C functions and
# enable C99 conformant vsnprintf() among other things.
#
-D_POSIX
)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_POSIX)
endif()
if( CMAKE_C_COMPILER_ID MATCHES "MSVC")
if (MSVC_VERSION LESS "1928")
message(FATAL_ERROR "Microsoft Visual Studio 2019 version 16.8 or later is required")
endif()
if (MSVC_VERSION GREATER_EQUAL "2000")
message(FATAL_ERROR "You are using an unsupported version of MSVC")
endif()
add_definitions(
/D_CRT_SECURE_NO_DEPRECATE
# -DPSAPI_VERSION=1 Programs that must run on earlier versions of Windows as well as Windows 7 and later
# versions should always call this function as GetProcessMemoryInfo. To ensure correct
# resolution of symbols, add Psapi.lib to the TARGETLIBS macro and compile the program
# with -DPSAPI_VERSION=1.To use run-time dynamic linking, load Psapi.dll.
# https://docs.microsoft.com/en-us/windows/win32/api/psapi/nf-psapi-getprocessmemoryinfo
# -D_ALLOW_KEYWORD_MACROS For VS2012 onwards the, C++ STL does not permit macro redefinitions of keywords
# (see https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2012/bb531344(v=vs.110))
# This definition prevents the complaint about the redefinition of inline by WinPCap
# in pcap-stdinc.h when compiling C++ files, e.g. the Qt UI
/DPSAPI_VERSION=1
/D_ALLOW_KEYWORD_MACROS
# Disable deprecation of POSIX function names.
# https://stackoverflow.com/questions/37845163/what-is-the-purpose-of-microsofts-underscore-c-functions
/D_CRT_NONSTDC_NO_WARNINGS
)
if(NOT WIRESHARK_TARGET_PLATFORM STREQUAL "x64")
add_definitions("/D_BIND_TO_CURRENT_CRT_VERSION=1")
endif()
# TODO: Re-enable /W3. It was disabled for a year and some warnings crept
# in that will fail with /Wx.
set(LOCAL_CFLAGS
/MP
/W3
)
set(WS_LINK_FLAGS "/LARGEADDRESSAWARE /MANIFEST:NO /INCREMENTAL:NO /RELEASE")
# To do: Add /external:... See https://devblogs.microsoft.com/cppblog/broken-warnings-theory/
#
# /diagnostics:caret Place a caret under compilation issues similar to
# Clang and gcc.
# /Zo Enhanced debugging of optimised code
# /utf-8 Set Source and Executable character sets to UTF-8
# VS2015(MSVC14): On by default when /Zi or /Z7 used.
# /guard:cf Control Flow Guard (compile and link).
# See https://docs.microsoft.com/en-us/windows/win32/secbp/control-flow-guard
# Note: This requires CMake 3.9.0 or newer.
# https://gitlab.kitware.com/cmake/cmake/commit/f973d49ab9d4c59b93f6dac812a94bb130200836
# /Qspectre Speculative execution attack mitigation
# See https://devblogs.microsoft.com/cppblog/spectre-mitigations-in-msvc/
list(APPEND LOCAL_CFLAGS /diagnostics:caret /Zo /utf-8 /guard:cf)
set(WS_LINK_FLAGS "${WS_LINK_FLAGS} /guard:cf")
set(WS_LINK_FLAGS "${WS_LINK_FLAGS} /STACK:0x800000")
# /Qspectre depends on the optional "Microsoft.VisualStudio.Component...Spectre" components,
# so we need to test for its availability.
set(WIRESHARK_COMMON_FLAGS /Qspectre)
if(ENABLE_CODE_ANALYSIS)
# We should probably add a code_analysis.props file and use it to set
# CAExcludePath, otherwise we trigger on Qt's headers:
# https://stackoverflow.com/questions/59669026/how-to-add-property-to-affect-code-analysis-in-cmake
# https://gitlab.kitware.com/cmake/cmake/-/issues/19682
# For now, we set CAExcludePath=C:\Qt;%include% in the Visual Studio
# Code Analys builder's environment.
list(APPEND LOCAL_CFLAGS
/analyze:WX-
/analyze:log:format:sarif
)
endif()
# Additional compiler warnings to be treated as "Level 3"
# when compiling Wireshark sources. (Selected from "level 4" warnings).
## 4295: array is too small to include a terminating null character
## 4100: unreferenced formal parameter
## 4189: local variable is initialized but not referenced
# Disable warnings about use of flexible array members:
## 4200: nonstandard extension used : zero-sized array in struct/union
list(APPEND LOCAL_CFLAGS /w34295 /w34100 /w34189 /wd4200)
# MSVC 14.28 + C11 enables C5105, but older Windows SDKs aren't completely compatible.
# Windows SDK 10.0.17763.0 generates syntax errors with C11 enabled.
# The variable CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION does not work with the Ninja generator. Presumably it requires a VS generator.
if (CMAKE_GENERATOR MATCHES "Visual Studio")
if (CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION VERSION_LESS 10.0.18362.0)
message(FATAL_ERROR "Windows SDK ${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION} doesn't support C11. Please make sure you're using 10.0.20348.0 or later.")
endif()
# Windows SDK 10.0.18362.0 to 10.0.19041.685 generate warning C5105 with C11 enabled.
if(CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION VERSION_LESS 10.0.20348.0)
message(WARNING "Windows SDK ${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION} doesn't support C11. Please make sure you're using 10.0.20348.0 or later.")
## 5105: macro expansion producing 'defined' has undefined behavior
list(APPEND LOCAL_CFLAGS /wd5105)
endif()
endif()
# We've matched these to specific compiler versions using the
# checks above. There's no need to pass them to check_c_compiler_flag
# or check_cxx_compiler_flag, which can be slow.
string(REPLACE ";" " " _flags "${LOCAL_CFLAGS}")
set(CMAKE_C_FLAGS "${_flags} ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "${_flags} ${CMAKE_CXX_FLAGS}")
else() # ! MSVC
if(APPLE)
# MIN_MACOS_VERSION is used to set LSMinimumSystemVersion
# in Info.plist, so start with something low.
set(MIN_MACOS_VERSION 10.13)
if(CMAKE_OSX_DEPLOYMENT_TARGET)
if(CMAKE_OSX_DEPLOYMENT_TARGET VERSION_LESS MIN_MACOS_VERSION)
message(FATAL_ERROR "We don't support building for macOS < ${MIN_MACOS_VERSION}")
endif()
set(MIN_MACOS_VERSION ${CMAKE_OSX_DEPLOYMENT_TARGET})
endif()
endif()
#
# NOTE: Adding new warnings is a policy decision that can have far-reaching
# implications for the project and each developers workflow. Modern
# C compilers are on a race to add new warnings, not always sensibly.
# They are opt-in so take a moment to fully consider the implications
# of enabling the latest shiny new warning.
# If in doubt ask on the Wireshark developer list (recommended).
#
list(APPEND WIRESHARK_COMMON_FLAGS
#
### Flags common to C and C++ ###
#
# -O<X> and -g get set by the CMAKE_BUILD_TYPE
-Wall
-Wextra
-Wformat
-Wformat=2
-Wtrampolines # Enable warnings about trampolines that require executable stacks
-Wbidi-chars=any
-Wpointer-arith
-Wformat-security
-fexcess-precision=fast # GCC-only
-Wvla
-Wattributes
-Wpragmas # Clang-only
-Wheader-guard # Clang-only
-Wcomma # Clang-only
-Wshorten-64-to-32 # Clang-only
-Wredundant-decls
-Wunreachable-code # Clang-only
-Wdocumentation # Clang-only
-Wlogical-op # GCC-only
# Run-time protections mechanisms
-fstrict-flex-arrays=3 # Consider a trailing array in a struct as a flexible array if declared as []
-fstack-clash-protection # Increased reliability of stack overflow detection
-fcf-protection=full # Enable control flow protection to counter Return Oriented Programming (ROP) and Jump Oriented Programming (JOP) attacks on many x86 architectures
-mbranch-protection=standard # Enable branch protection to counter Return Oriented Programming (ROP) and Jump Oriented Programming (JOP) attacks on AArch64
-D_GLIBCXX_ASSERTIONS # Precondition checks for C++ standard library calls. Can impact performance.
-fstack-protector-strong # Stack smashing protector
-fno-delete-null-pointer-checks # Force retention of null pointer checks
# The above used to fail on macOS El Capitan clang (see below in PEDANTIC) Does it work now?
-fno-strict-overflow # Defines signed overflow as wrapping on gcc and clang, prevents optimizations that assume overflow never happens
-fno-strict-aliasing # Do not assume strict aliasing
-ftrivial-auto-var-init # Perform trivial auto variable initialization
-fexceptions # Enable exception propagation to harden multi-threaded C code
#
# Disable errors unconditionally for some static analysis warnings
# that are dormant at lower optimizations levels or active only in
# bleeding edge versions of a compiler and possibly also
# prone to false positives and compiler bugs. This is
# a big nuisance because the warning is dormant and a low
# priority target for action. That is very disruptive
# with -Werror enabled (the default on the master branch).
#
#-Wno-error=stringop-overflow=
#
# XXX Now that we have a CI job with Release build type (using
# -O3 optimization level) the dormancy issue should be ameliorated
# so comment out these exceptions to re-evaluate the impact.
#-Wno-error=maybe-uninitialized
#-Wno-error=alloc-size-larger-than=
#
# Updating external dependencies can introduce new deprecations.
# Also fixing new internal deprecations takes time.
# We want to be able to build with -Werror in that case. New
# code should not introduce new deprecations in any case.
#
#-Wno-error=deprecated-declarations
)
if (CMAKE_C_COMPILER_ID MATCHES "Clang")
# Avoid "argument unused during compilation" warnings for
# -fstack-clash-protection and -mbranch-protection=standard
list(APPEND WIRESHARK_COMMON_FLAGS -Qunused-arguments)
endif()
if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
# _FORTIFY_SOURCE requires -O1 or higher, and the Debug
# build type has no optimization
if((CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "12.0") OR
(CMAKE_C_COMPILER_ID MATCHES "Clang" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "9.0"))
# On some gcc < 12.0, test_compiler_flag will report that
# -D_FORTIFY_SOURCE=3 is valid, but actually trying to compile
# with it will give a warning that it has the same effect as
# -D_FORTIFY_SOURCE=2
list(APPEND WIRESHARK_COMMON_FLAGS
-U_FORTIFY_SOURCE # Run-time buffer overflow detection. For dist like Ubuntu, U_FORTIFY_SOURCE must be input before D_FORTIFY_SOURCE
-D_FORTIFY_SOURCE=3 # Fortify sources with compile- and run-time checks for unsafe libc usage and buffer overflows. Requires -O1 or higher
)
endif()
endif()
# test_compiler_flag doesn't seem to test that a flag is supported on
# a cross-compiled target, only for the native architecture. (Thus
# conversely it does work to verify that -mbranch-protection=standard
# doesn't work on x64 when compiling natively.)
# TODO: Check that this approach works.
#if(NOT CMAKE_CROSSCOMPILING)
# list(APPEND WIRESHARK_COMMON_FLAGS
# -fhardened # Enable pre-determined set of hardening options in GCC. Currently, -fhardened is only supported on GNU/Linux targets
# )
#endif()
if((NOT ENABLE_ASAN) AND (NOT ENABLE_TSAN) AND (NOT ENABLE_UBSAN) AND (NOT DISABLE_FRAME_LARGER_THAN_WARNING))
#
# Only do this if none of ASan, TSan, and UBSan are
# enabled; the instrumentation they add increases
# the stack usage - we only care about stack
# usage in normal operation.
#
list(APPEND WIRESHARK_COMMON_FLAGS
-Wframe-larger-than=32768
)
endif()
list(APPEND WIRESHARK_C_ONLY_FLAGS
#
### Flags for C only ###
#
#
# XXX - some versions of GCC, including the one in at
# least some Xcode versions that come with Mac OS X
# 10.5, complain about variables in function and
# function pointer *declarations* shadowing other
# variables. The autoconf script checked for that; we
# don't.
-Wshadow
-Wold-style-definition
-Wstrict-prototypes
-Wincompatible-pointer-types
-Wint-conversion
)
#
# The universal zero initializer (in C: struct s x = { 0 };) for
# structures with multiple members is perfectly legal, but some older
# compilers warn about it. Silence those older compilers.
#
if((CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_LESS "5.1") OR
(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND CMAKE_C_COMPILER_VERSION VERSION_LESS "6.0") OR
(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND CMAKE_C_COMPILER_VERSION VERSION_LESS "12.0"))
if(NOT CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_VERSION VERSION_LESS "5.0")
list(APPEND WIRESHARK_C_ONLY_FLAGS -Wno-missing-field-initializers)
endif()
# Silence warnings for initialization of nested structs like
# struct { struct { int a, b; } s; int c; } v = { 0 };
list(APPEND WIRESHARK_C_ONLY_FLAGS -Wno-missing-braces)
endif()
list(APPEND WIRESHARK_CXX_ONLY_FLAGS
#
### Flags for C++ only ###
#
-Wextra-semi # Clang-only
)
#
# Not all warnings are the same. They fall on a spectrum from "critical"
# to "pedantic nonsense". These are warnings that realistically are worth
# fixing eventually.
# TODO https://gitlab.com/wireshark/wireshark/-/issues/19995
#
if(ENABLE_TODO_WARNINGS)
list(APPEND WIRESHARK_COMMON_FLAGS
#
# All the registration functions block these for now.
#
-Wmissing-prototypes
-Wmissing-declarations
-Wconversion
-Wsign-conversion
#
# A bunch of "that might not work on SPARC" code blocks
# this one for now; some of it is code that *will* work
# on SPARC, such as casts of "struct sockaddr *" to
# "struct sockaddr_in *", which are required by some
# APIs such as getifaddrs().
#
-Wcast-align
)
else()
list(APPEND WIRESHARK_COMMON_FLAGS
#
# Converting from g_printf() and g_snprintf() to stdio.h turns
# up many of these warnings. They will have to be handled later.
# It can be a lot of work to fix properly and none of them
# seem to flag very interesting issues.
#
-Wno-format-truncation # Enabled with -Wall
-Wno-format-nonliteral # Enabled with -Wformat=2
)
list(APPEND WIRESHARK_C_ONLY_FLAGS
-Wno-pointer-sign # Enabled with -Wall
)
endif()
#
# These are not enabled by default, because the warnings they
# produce are very hard or impossible to eliminate.
#
if(ENABLE_PEDANTIC_COMPILER_WARNINGS)
list(APPEND WIRESHARK_COMMON_FLAGS
# The following are for C and C++
-Wpedantic
-Wno-overlength-strings
-Wno-long-long
#
# As we use variadic macros, we don't want warnings
# about them, even with -Wpedantic.
#
-Wno-variadic-macros
#
# Various code blocks this one.
#
-Woverflow
-fstrict-overflow -Wstrict-overflow=4
#
# Due to various places where APIs we don't control
# require us to cast away constness, we can probably
# never enable this one with -Werror.
#
-Wcast-qual
#
# Doesn't warn of interesting issues. Usually the
# duplicated branches are protocol constants that
# happen to be equal and are relevant for documentation
# and readability and are trivially optimized by the
# compiler.
#
-Wduplicated-branches # GCC-only
#
# No longer supported by El Capitan clang on C++
# XXX - is this one of those where CMake's check
# doesn't fail, so it won't reject this?
#
-fno-delete-null-pointer-checks
)
#
# Some loops are safe, but it's hard to convince the compiler of
# that. Always disable the warning on GCC 7 due to a bug that
# cause lots of false positives.
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81408
#
if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION MATCHES "^7\\.")
list(APPEND WIRESHARK_COMMON_FLAGS -Wunsafe-loop-optimizations)
endif()
list(APPEND WIRESHARK_C_ONLY_FLAGS
# The following are C only, not C++
#
# Due to various places where APIs we don't control
# require us to cast away constness, we can probably
# never enable this one with -Werror.
#
-Wbad-function-cast
)
list(APPEND WIRESHARK_CXX_ONLY_FLAGS
)
endif()
if(ENABLE_COMPILER_COLOR_DIAGNOSTICS)
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
set(WIRESHARK_COMMON_FLAGS ${WIRESHARK_COMMON_FLAGS}
-fcolor-diagnostics
)
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU")
set(WIRESHARK_COMMON_FLAGS ${WIRESHARK_COMMON_FLAGS}
-fdiagnostics-color=always
)
endif()
endif()
set(WIRESHARK_LD_FLAGS
# See also CheckCLinkerFlag.cmake
-Wl,--as-needed
# -flto
# -fwhopr
# -fwhole-program
)
endif() # ! MSVC
# Counterhack to work around some cache magic in CHECK_C_SOURCE_COMPILES
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
if(ENABLE_STATIC)
set(BUILD_SHARED_LIBS 0)
else()
set(BUILD_SHARED_LIBS 1)
endif()
function(test_compiler_flag _lang _this_flag _valid_flags_var)
string(MAKE_C_IDENTIFIER "${_lang}${_this_flag}_VALID" _flag_var)
set(_test_flags "${${_valid_flags_var}} ${_this_flag}")
if(_lang STREQUAL "C")
check_c_compiler_flag("${_test_flags}" ${_flag_var})
elseif(_lang STREQUAL "CXX")
check_cxx_compiler_flag("${_test_flags}" ${_flag_var})
else()
message(FATAL_ERROR "Language must be C or CXX")
endif()
if (${_flag_var})
set(${_valid_flags_var} "${_test_flags}" PARENT_SCOPE)
endif()
endfunction()
foreach(THIS_FLAG ${WIRESHARK_COMMON_FLAGS} ${WIRESHARK_C_ONLY_FLAGS})
test_compiler_flag(C ${THIS_FLAG} ADDED_CMAKE_C_FLAGS)
endforeach()
set(CMAKE_C_FLAGS "${ADDED_CMAKE_C_FLAGS} ${CMAKE_C_FLAGS}")
foreach(THIS_FLAG ${WIRESHARK_COMMON_FLAGS} ${WIRESHARK_CXX_ONLY_FLAGS})
test_compiler_flag(CXX ${THIS_FLAG} ADDED_CMAKE_CXX_FLAGS)
endforeach()
set(CMAKE_CXX_FLAGS "${ADDED_CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS}")
# Strips the source and build directory prefix from the __FILE__ macro to ensure
# reproducible builds. Supported since GCC 8, Clang support is pending.
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
# If the build dir is within the source dir, CMake will use something
# like ../epan/dfilter/semcheck.c. Map these relative paths in addition
# to CMAKE_BINARY_DIR since compile_commands.json uses absolute paths.
file(RELATIVE_PATH _relative_source_dir "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}")
string(REGEX REPLACE "/$" "" _relative_source_dir "${_relative_source_dir}")
check_c_compiler_flag(-fmacro-prefix-map=old=new C_fmacro_prefix_map_old_new_VALID)
check_cxx_compiler_flag(-fmacro-prefix-map=old=new CXX_fmacro_prefix_map_old_new_VALID)
foreach(_lang C CXX)
if(${_lang}_fmacro_prefix_map_old_new_VALID)
set(_flags CMAKE_${_lang}_FLAGS)
set(${_flags} "${${_flags}} -fmacro-prefix-map=\"${CMAKE_SOURCE_DIR}/\"=")
set(${_flags} "${${_flags}} -fmacro-prefix-map=\"${CMAKE_BINARY_DIR}/\"=")
if(_relative_source_dir MATCHES "\\.\\.$")
set(${_flags} "${${_flags}} -fmacro-prefix-map=\"${_relative_source_dir}/\"=")
endif()
endif()
endforeach()
endif()