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CMakeLists.txt
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CMakeLists.txt
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# CMakeLists.txt
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <[email protected]>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
if(WIN32)
# Needed for GREATER_EQUAL operator
cmake_minimum_required(VERSION 3.7)
else()
cmake_minimum_required(VERSION 3.5)
endif()
project(Wireshark C CXX)
# Updated by make-version.pl
set(GIT_REVISION 0)
set(PROJECT_MAJOR_VERSION 2)
set(PROJECT_MINOR_VERSION 9)
set(PROJECT_PATCH_VERSION 1)
set(PROJECT_BUILD_VERSION ${GIT_REVISION})
set(PROJECT_VERSION_EXTENSION "")
set(PROJECT_RELEASE_VERSION "${PROJECT_MAJOR_VERSION}.${PROJECT_MINOR_VERSION}")
if(DEFINED ENV{WIRESHARK_VERSION_EXTRA})
set(PROJECT_VERSION_EXTENSION "$ENV{WIRESHARK_VERSION_EXTRA}")
endif()
set(PROJECT_VERSION "${PROJECT_MAJOR_VERSION}.${PROJECT_MINOR_VERSION}.${PROJECT_PATCH_VERSION}${PROJECT_VERSION_EXTENSION}")
# packaging information
if(WIN32)
set(CPACK_PACKAGE_NAME Wireshark)
else()
set(CPACK_PACKAGE_NAME wireshark)
endif()
set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
message(STATUS "Generating build using CMake ${CMAKE_VERSION}")
#Where to find local cmake scripts
set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
# If our target platform is enforced by our generator, set
# WIRESHARK_TARGET_PLATFORM accordingly. Otherwise use
# %WIRESHARK_TARGET_PLATFORM%.
if(WIN32)
find_package(PowerShell REQUIRED)
if(CMAKE_CL_64 OR CMAKE_GENERATOR MATCHES "Win64")
set(WIRESHARK_TARGET_PLATFORM win64)
elseif(CMAKE_GENERATOR MATCHES "Visual Studio")
set(WIRESHARK_TARGET_PLATFORM win32)
else()
set(WIRESHARK_TARGET_PLATFORM $ENV{WIRESHARK_TARGET_PLATFORM})
endif()
if(WIRESHARK_TARGET_PLATFORM MATCHES "win64")
set(WIRESHARK_TARGET_PROCESSOR_ARCHITECTURE amd64)
else()
set(WIRESHARK_TARGET_PROCESSOR_ARCHITECTURE x86)
endif()
# Sanity check
if(DEFINED ENV{PLATFORM})
string(TOLOWER $ENV{PLATFORM} _vs_platform)
else()
set(_vs_platform "[undefined]") # x86
endif()
if(
(_vs_platform STREQUAL "x64" AND NOT WIRESHARK_TARGET_PLATFORM STREQUAL "win64")
OR
(_vs_platform STREQUAL "[undefined]" AND NOT WIRESHARK_TARGET_PLATFORM STREQUAL "win32")
)
message(FATAL_ERROR "The PLATFORM environment variable (${_vs_platform})"
" doesn't match the generator platform (${WIRESHARK_TARGET_PLATFORM})")
endif()
message(STATUS "Building for ${WIRESHARK_TARGET_PLATFORM} using ${CMAKE_GENERATOR}")
# Determine where the 3rd party libraries will be
if( DEFINED ENV{WIRESHARK_LIB_DIR} )
# The buildbots set WIRESHARK_LIB_DIR but not WIRESHARK_BASE_DIR.
file( TO_CMAKE_PATH "$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)
# 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}
RESULT_VARIABLE _win_setup_failed
)
if(_win_setup_failed)
message(FATAL_ERROR "Windows setup (win-setup.ps1) failed.")
endif()
# XXX Add a dependency on ${_ws_lib_dir}/current_tag.txt?
# Head off any attempts to use Cygwin's Python.
include(LocatePythonExecutable)
# Prepopulate some ConfigureChecks values. Compilation checks
# on Windows can be slow.
set(HAVE_FCNTL_H TRUE)
set(HAVE_FLOORL TRUE)
set(HAVE_LRINT TRUE)
# It looks like we call check_type_size somewhere, which checks
# for these.
set(HAVE_SYS_TYPES_H TRUE)
set(HAVE_STDINT_H TRUE)
set(HAVE_STDDEF_H TRUE)
endif(WIN32)
include(UseCustomIncludes)
ADD_CUSTOM_CMAKE_INCLUDE()
# This cannot be implemented via option(...)
if( NOT CMAKE_BUILD_TYPE )
set( CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
FORCE)
endif()
message(STATUS "Configuration types: ${CMAKE_CONFIGURATION_TYPES}")
string(TOUPPER "${CMAKE_BUILD_TYPE}" _build_type)
message(STATUS "CMAKE_C_FLAGS_${_build_type}: ${CMAKE_C_FLAGS_${_build_type}}")
message(STATUS "CMAKE_CXX_FLAGS_${_build_type}: ${CMAKE_CXX_FLAGS_${_build_type}}")
# 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 ${Wireshark_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all archives.")
endif()
if(NOT EXECUTABLE_OUTPUT_PATH)
set(EXECUTABLE_OUTPUT_PATH ${Wireshark_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all executables.")
endif()
if(NOT LIBRARY_OUTPUT_PATH)
set(LIBRARY_OUTPUT_PATH ${Wireshark_BINARY_DIR}/run CACHE INTERNAL
"Single output directory for building all libraries.")
endif()
#
# The release mode (CMAKE_BUILD_TYPE=release) defines NDEBUG for
# the Unix Makefile generator.
#
# Defines CMAKE_INSTALL_BINDIR, CMAKE_INSTALL_DATADIR, etc ...
if(WIN32)
# Override some values on Windows, to match the existing
# convention of installing everything to a single root folder.
set(CMAKE_INSTALL_BINDIR ".")
set(CMAKE_INSTALL_LIBDIR ".")
set(CMAKE_INSTALL_INCLUDEDIR "include")
set(CMAKE_INSTALL_DATADIR ".")
else()
# By default INSTALL_DATADIR is set to INSTALL_DATAROOTDIR, set the
# proper value here.
set(CMAKE_INSTALL_DATADIR "share/${CPACK_PACKAGE_NAME}"
CACHE PATH "Read-only architecture-independent data"
)
endif()
include(GNUInstallDirs)
# Make sure our executables can can load our libraries if we install into
# a non-default directory on Unix-like systems other than macOS.
# https://cmake.org/Wiki/CMake_RPATH_handling
if(NOT CMAKE_INSTALL_RPATH AND NOT (WIN32 OR APPLE))
# Some systems may have limited or non-existent support for $ORIGIN.
# https://www.lekensteyn.nl/rpath.html
set(_enable_rpath_origin 0)
if(CMAKE_SYSTEM_NAME MATCHES "^(Linux|SunOS|FreeBSD)$")
set(_enable_rpath_origin 1)
endif()
set(ENABLE_RPATH_ORIGIN ${_enable_rpath_origin} CACHE BOOL "Use \$ORIGIN with RPATH")
mark_as_advanced(ENABLE_RPATH_ORIGIN)
if(ENABLE_RPATH_ORIGIN)
# Set an install RPATH relative to the location of the binary, to
# provide a fully relocatable package.
set(CMAKE_INSTALL_RPATH "\$ORIGIN/../${CMAKE_INSTALL_LIBDIR}")
# Add the automatically determined parts of the RPATH
# which point to directories outside the build tree to the install RPATH.
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
else()
# Add an absolute RPATH if it is not already included in the
# default search list.
list(FIND CMAKE_C_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_FULL_LIBDIR}" IS_SYSTEM_DIR)
if(IS_SYSTEM_DIR STREQUAL "-1")
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_FULL_LIBDIR}")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif()
endif()
endif()
if(WIN32)
# Linking with wsetargv.obj enables "wildcard expansion" of
# command-line arguments.
set(WILDCARD_OBJ wsetargv.obj)
endif(WIN32)
# 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()
# These are required in .rc files and manifests
set(VERSION_MAJOR ${PROJECT_MAJOR_VERSION})
set(VERSION_MINOR ${PROJECT_MINOR_VERSION})
set(VERSION_MICRO ${PROJECT_PATCH_VERSION})
set(VERSION_BUILD ${PROJECT_BUILD_VERSION})
set(RC_VERSION ${PROJECT_MAJOR_VERSION},${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}
)
include( CMakeOptions.txt )
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()
if(APPLE AND EXISTS /usr/local/opt/qt5)
# Homebrew installs Qt5 (up to at least 5.11.0) in
# /usr/local/qt5. Ensure that it can be found by CMake
# since it is not in the default /usr/local prefix.
# Add it to PATHS so that it doesn't override the
# CMAKE_PREFIX_PATH environment variable.
# QT_FIND_PACKAGE_OPTIONS should be passed to find_package,
# e.g. find_package(Qt5Core ${QT_FIND_PACKAGE_OPTIONS})
set (QT_FIND_PACKAGE_OPTIONS PATHS /usr/local/opt/qt5)
endif()
set(OSS_FUZZ OFF CACHE BOOL "Whether building for oss-fuzz")
mark_as_advanced(OSS_FUZZ)
if(OSS_FUZZ)
if(ENABLE_FUZZER)
# In oss-fuzz mode, the fuzzing engine can be afl or libFuzzer.
message(FATAL_ERROR "Cannot force libFuzzer when using oss-fuzz")
endif()
# Must not depend on external dependencies so statically link all libs.
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
endif()
#
# Linking can consume a lot of memory, especially when built with ASAN and
# static libraries (like oss-fuzz) or Debug mode. With Ninja, the number of
# parallel linker processes is constrained by job parallelism (-j), but this can
# be reduced further by setting "job pools" to a lower number.
#
if(CMAKE_MAKE_PROGRAM MATCHES "ninja" AND OSS_FUZZ)
# Assume oss-fuzz linker jobs do not require more than 1.2G per task
set(per_job_memory_mb 1200)
cmake_host_system_information(RESULT total_memory_mb QUERY TOTAL_PHYSICAL_MEMORY)
math(EXPR parallel_link_jobs "${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: ${parallel_link_jobs}")
endif()
# Always enable position-independent code when compiling, even for
# executables, so you can build position-independent executables.
# -pie is added below for non-MSVC.
# Needed when either:
# - Qt5_POSITION_INDEPENDENT_CODE is set and CMake < 2.8.11
# - PIE is wanted (-pie) and you want to add -fPIC/-fPIE automatically.
# This option only has an effect on CMake >= 2.8.9
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
# Path to our generated executables (or wrapper scripts)
if(WIN32)
set(WS_PROGRAM_PATH ./run/$<CONFIG>)
else()
set(WS_PROGRAM_PATH ./run)
endif()
if( CMAKE_C_COMPILER_ID MATCHES "MSVC")
if ((MSVC_VERSION LESS "1900") OR (MSVC_VERSION GREATER_EQUAL "2000"))
message(FATAL_ERROR "You are using an unsupported version of MSVC")
endif()
add_definitions(
/DWIN32_LEAN_AND_MEAN
/D_CRT_SECURE_NO_DEPRECATE
# NOMINMAX keeps windows.h from defining "min" and "max" via windef.h.
# This avoids conflicts with the C++ standard library.
/DNOMINMAX
# -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.
# http://msdn.microsoft.com/en-us/library/windows/desktop/ms683219(v=vs.85).aspx
# -D_ALLOW_KEYWORD_MACROS For VS2012 onwards the, C++ STL does not permit macro redefinitions of keywords
# (see http://msdn.microsoft.com/en-us/library/bb531344(v=vs.110).aspx)
# 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
)
if(NOT WIRESHARK_TARGET_PLATFORM STREQUAL "win64")
add_definitions("/D_BIND_TO_CURRENT_CRT_VERSION=1")
endif()
set(LOCAL_CFLAGS
/MP
)
set(WS_LINK_FLAGS "/LARGEADDRESSAWARE /MANIFEST:NO /INCREMENTAL:NO /RELEASE")
# To do: Add /external:... See https://blogs.msdn.microsoft.com/vcblog/2017/12/13/broken-warnings-theory/
#
# /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://msdn.microsoft.com/en-us/library/windows/desktop/mt637065.aspx
# Note: This requires CMake 3.9.0 or newer.
# https://gitlab.kitware.com/cmake/cmake/commit/f973d49ab9d4c59b93f6dac812a94bb130200836
# /Qspectre Speculative execution attack mitigation
# See https://blogs.msdn.microsoft.com/vcblog/2018/01/15/spectre-mitigations-in-msvc/
list(APPEND LOCAL_CFLAGS /Zo /utf-8 /guard:cf)
set(WS_LINK_FLAGS "${WS_LINK_FLAGS} /guard:cf")
# /Qspectre is not available for VS2015 or older VS2017. Test for its availability.
set(WIRESHARK_COMMON_FLAGS /Qspectre)
if(ENABLE_CODE_ANALYSIS)
list(APPEND LOCAL_CFLAGS /analyze:WX-)
endif()
# Additional compiler warnings to be treated as "Level 3"
# when compiling Wireshark sources. (Selected from "level 4" warnings).
## 4295: array is too small to include a terminating null character
## 4189: local variable is initialized but not referenced
# Disable warnings about about use of flexible array members:
## 4200: nonstandard extension used : zero-sized array in struct/union
list(APPEND LOCAL_CFLAGS /w34295 /w34189 /wd4200)
# We've matched these to specific compiler versions using the
# checks above. There's no need to pass them to check_c_compiler_flag
# or check_cxx_compiler_flag, which can be slow.
string(REPLACE ";" " " _flags "${LOCAL_CFLAGS}")
set(CMAKE_C_FLAGS "${_flags} ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "${_flags} ${CMAKE_CXX_FLAGS}")
else() # ! MSVC
if(CMAKE_OSX_DEPLOYMENT_TARGET)
if(APPLE)
if(CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.0")
message(FATAL_ERROR "We don't support building for Mac OS X 10.0")
elseif(CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.1")
message(FATAL_ERROR "We don't support building for Mac OS X 10.1")
elseif(CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.2")
message(FATAL_ERROR "We don't support building for Mac OS X 10.2")
elseif(CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.4" OR CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.5")
#
# Only 32-bit builds are supported. 10.5
# (and 10.4?) had a bug that causes some BPF
# functions not to work with 64-bit userland
# code, so capturing won't work.
#
set(CMAKE_C_FLAGS "-m32 ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-m32 ${CMAKE_CXX_FLAGS}")
set(WS_LINK_FLAGS "-m32 ${WS_LINK_FLAGS}")
endif()
message(STATUS "Building for Mac OS X/OS X/macOS ${CMAKE_OSX_DEPLOYMENT_TARGET}")
else()
message(FATAL_ERROR "CMAKE_OSX_DEPLOYMENT_TARGET only applies when building for macOS")
endif()
endif()
#
# Do whatever is necessary to enable as much C99 support as
# possible in the C compiler. Newer versions of compilers
# might default to supporting C99, but older versions may
# require a special flag.
#
# We do not want strict C99 support, as we may also want to
# use compiler extensions.
#
# Prior to CMake 3.1, setting CMAKE_C_STANDARD will not have
# any effect, so, unless and until we require CMake 3.1 or
# later, we have to do it ourselves on pre-3.1 CMake, so we
# just do it ourselves on all versions of CMake.
#
# Note: with CMake 3.1 through 3.5, the only compilers for
# which CMake handles CMAKE_C_STANDARD are GCC and Clang.
# 3.6 adds support only for Intel C; 3.9 adds support for
# PGI C, Sun C, and IBM XL C, and 3.10 adds support for
# Cray C and IAR C, but no version of CMake has support for
# HP C. Therefore, even if we use CMAKE_C_STANDARD with
# compilers for which CMake supports it, we may still have
# to do it ourselves on other compilers.
#
# In addition, CMake 3.5.2 seems to think that GCC versions
# less than 4.4 don't support -std=gnu99, which we need in
# order to get support for "for (int i = 0; i < n; i++) ;",
# which is another reason not to rely on CMake's CMAKE_C_STANDARD
# support.
#
# See the CMake documentation for the CMAKE_<LANG>_COMPILER_ID
# variables for a list of compiler IDs.
#
# We don't worry about MSVC; it doesn't have such a flag -
# either it doesn't support the C99 features we need at all,
# or it supports them regardless of the compiler flag.
#
# XXX - we add the flag for a given compiler to CMAKE_C_FLAGS,
# so we test whether it works and add it if we do. We don't
# test whether it's necessary in order to get the C99 features
# that we use; if we ever have a user who tries to compile with
# a compiler that can't be made to support those features, we
# can add a test to make sure we actually *have* C99 support.
#
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR
CMAKE_C_COMPILER_ID MATCHES "Clang")
#
# We use -std=gnu99 rather than -std=c99 because, for
# some older compilers such as GCC 4.4.7, -std=gnu99
# is required to avoid errors about C99 constructs
# such as "for (int i = 0; i < n; i++) ;".
#
set(CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}")
elseif(CMAKE_C_COMPILER_ID MATCHES "XL")
#
# We want support for extensions picked up for
# GNU C compatibility, so we use -qlanglvl=extc99.
#
set(CMAKE_C_FLAGS "-qlanglvl=extc99 ${CMAKE_C_FLAGS}")
elseif(CMAKE_C_COMPILER_ID MATCHES "HP")
#
# We also need to add -Wp,-H200000 to handle some large
# #defines we have; that flag is not necessary for the
# C++ compiler unless the "legacy" C++ preprocessor is
# being used (+legacy_cpp). We don't want the legacy
# preprocessor if it's not the default, so we just add
# -Wp,-H200000 to the C flags. (If there are older
# versions of aC++ that only support the legacy
# preprocessor, and require that we boost the table
# size, we'd have to check whether -Wp,-H200000 is
# supported by the C++ compiler and add it only if it is.)
#
set(CMAKE_C_FLAGS "-AC99 -Wp,-H200000 $WS_CFLAGS ${CMAKE_C_FLAGS}")
elseif(CMAKE_C_COMPILER_ID MATCHES "Sun")
#
# We also crank up the warning level.
#
set(CMAKE_C_FLAGS "-xc99 -v ${CMAKE_C_FLAGS}")
elseif(CMAKE_C_COMPILER_ID MATCHES "Intel")
set(CMAKE_C_FLAGS "-c99 ${CMAKE_C_FLAGS}")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
set(WIRESHARK_COMMON_FLAGS ${WIRESHARK_COMMON_FLAGS}
# avoid "argument unused during compilation" warnings
# (for example, when getting the -gsplit-dwarf option or
# when combining -fwrapv with -fno-strict-overflow)
-Qunused-arguments
)
else()
set(WIRESHARK_COMMON_FLAGS ${WIRESHARK_COMMON_FLAGS}
-fexcess-precision=fast
)
endif()
list(APPEND WIRESHARK_COMMON_FLAGS
# The following are for C and C++
# -O<X> and -g get set by the CMAKE_BUILD_TYPE
-Wall
-Wextra
-Wendif-labels
-Wpointer-arith
-Wformat-security
-fwrapv
-fno-strict-overflow
-Wvla
-Waddress
-Wattributes
-Wdiv-by-zero
-Wignored-qualifiers
-Wpragmas
-Wno-overlength-strings
-Wno-long-long
-Wheader-guard
-Wcomma
-Wshorten-64-to-32
)
#
# Code that may be worth looking into (coding practices)
#
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.
#
set(WIRESHARK_COMMON_FLAGS ${WIRESHARK_COMMON_FLAGS}
-Wframe-larger-than=32768
)
endif()
list(APPEND WIRESHARK_C_ONLY_FLAGS
# The following are C only, not C++
-Wc++-compat
-Wunused-const-variable
#
# 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
-Wno-pointer-sign
-Wold-style-definition
-Wstrict-prototypes
#
# Some versions of GCC, such as 4.3.2 and 4.4.5,
# generate logical-op warnings when strchr() is given a
# constant string. The autoconf script checked for that;
# we don't.
#
-Wlogical-op
-Wjump-misses-init
#
# Implicit function declarations are an error in C++ and most
# likely a programming error in C. Turn -Wimplicit-int and
# -Wimplicit-function-declaration into an error by default.
#
-Werror=implicit
)
#
# 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 "10.0"))
if(NOT CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_VERSION VERSION_LESS "4.7")
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
-Wextra-semi
)
#
# These are not enabled by default, because the warnings they
# produce are very hard or impossible to eliminate.
#
if(ENABLE_EXTRA_COMPILER_WARNINGS) # This overrides -Werror
list(APPEND WIRESHARK_COMMON_FLAGS
# The following are for C and C++
-Wpedantic
#
# 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
#
# Some generated ASN.1 dissectors block this one;
# multiple function declarations for the same
# function are being generated.
#
-Wredundant-decls
#
# Some loops are safe, but it's hard to convince the
# compiler of that.
#
-Wunsafe-loop-optimizations
#
# All the registration functions block these for now.
#
-Wmissing-prototypes
-Wmissing-declarations
#
# 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
#
# Works only with Clang
#
-Wunreachable-code
#
# Works only with Clang but generates a lot of warnings
# (about glib library not using Doxygen)
#
-Wdocumentation
#
# Works only with GCC 7
#
-Wduplicated-branches
#
# 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
)
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()
add_definitions(
-DG_DISABLE_DEPRECATED
-DG_DISABLE_SINGLE_INCLUDES
)
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}")
include(CMakePushCheckState)
if(ENABLE_ASAN)
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=address")
check_c_compiler_flag(-fsanitize=address C__fsanitize_address_VALID)
check_cxx_compiler_flag(-fsanitize=address CXX__fsanitize_address_VALID)
cmake_pop_check_state()
if(NOT C__fsanitize_address_VALID OR NOT CXX__fsanitize_address_VALID)
message(FATAL_ERROR "ENABLE_ASAN was requested, but not supported!")
endif()
set(CMAKE_C_FLAGS "-fsanitize=address ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-fsanitize=address ${CMAKE_CXX_FLAGS}")
# Disable ASAN for build-time tools, e.g. lemon
check_c_compiler_flag(-fno-sanitize=all C__fno_sanitize_all_VALID)
if(C__fno_sanitize_all_VALID)
set(NO_SANITIZE_CFLAGS "-fno-sanitize=all")
set(NO_SANITIZE_LDFLAGS "-fno-sanitize=all")
endif()
endif()
if(ENABLE_TSAN)
# Available since Clang >= 3.2 and GCC >= 4.8
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=thread")
check_c_compiler_flag(-fsanitize=thread C__fsanitize_thread_VALID)
check_cxx_compiler_flag(-fsanitize=thread CXX__fsanitize_thread_VALID)
cmake_pop_check_state()
if(NOT C__fsanitize_thread_VALID OR NOT CXX__fsanitize_thread_VALID)
message(FATAL_ERROR "ENABLE_TSAN was requested, but not supported!")
endif()
set(CMAKE_C_FLAGS "-fsanitize=thread ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-fsanitize=thread ${CMAKE_CXX_FLAGS}")
set(WS_LINK_FLAGS "-fsanitize=thread ${WS_LINK_FLAGS}")
endif()
if(ENABLE_UBSAN)
# Available since Clang >= 3.3 and GCC >= 4.9
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=undefined")
check_c_compiler_flag(-fsanitize=undefined C__fsanitize_undefined_VALID)
check_cxx_compiler_flag(-fsanitize=undefined CXX__fsanitize_undefined_VALID)
cmake_pop_check_state()
if(NOT C__fsanitize_undefined_VALID OR NOT CXX__fsanitize_undefined_VALID)
message(FATAL_ERROR "ENABLE_UBSAN was requested, but not supported!")
endif()
set(CMAKE_C_FLAGS "-fsanitize=undefined ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-fsanitize=undefined ${CMAKE_CXX_FLAGS}")
endif()
if(ENABLE_FUZZER)
# Available since Clang >= 6
# Will enable coverage flags which can be used by the fuzzshark target.
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=fuzzer-no-link")
check_c_compiler_flag(-fsanitize=fuzzer C__fsanitize_fuzzer_no_link_VALID)
check_cxx_compiler_flag(-fsanitize=fuzzer CXX__fsanitize_fuzzer_no_link_VALID)
cmake_pop_check_state()
if(NOT C__fsanitize_fuzzer_no_link_VALID OR NOT CXX__fsanitize_fuzzer_no_link_VALID)
message(FATAL_ERROR "ENABLE_FUZZER was requested, but not supported!")
endif()
set(CMAKE_C_FLAGS "-fsanitize=fuzzer-no-link ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-fsanitize=fuzzer-no-link ${CMAKE_CXX_FLAGS}")
endif()
set(WERROR_COMMON_FLAGS "")
if(NOT DISABLE_WERROR AND NOT ENABLE_EXTRA_COMPILER_WARNINGS)
if(CMAKE_C_COMPILER_ID MATCHES "MSVC")
set(WERROR_COMMON_FLAGS "/WX")
else()
#
# If a warning has been enabled by -Wall or -W,
# and have specified -Werror, there appears to be
# no way, in Apple's llvm-gcc, to prevent that
# particular warning from giving an error - not
# with a pragma, not with -Wno-{warning}, and not
# with -Wno-error={warning}.
#
# Therefore, with that compiler, we just disable
# -Werror.
#
if ((NOT APPLE) OR CMAKE_C_COMPILER_ID MATCHES "Clang")
check_c_compiler_flag(-Werror WERROR)
if (WERROR)
set(WERROR_COMMON_FLAGS "-Werror")
endif()
endif()
endif()
endif()
#
# Try to have the compiler default to hiding symbols, so that only
# symbols explicitly exported with WS_DLL_PUBLIC will be visible
# outside (shared) libraries; that way, more UN*X builds will catch
# failures to export symbols, rather than having that fail only on
# Windows.
#
# We don't need that with MSVC, as that's the default.
#
if( NOT CMAKE_C_COMPILER_ID MATCHES "MSVC")
#
# Try the GCC-and-compatible -fvisibility-hidden first.
#
check_c_compiler_flag(-fvisibility=hidden FVHIDDEN)
if(FVHIDDEN)
set(CMAKE_C_FLAGS "-fvisibility=hidden ${CMAKE_C_FLAGS}")
else()
#
# OK, try the Sun^WOracle C -xldscope=hidden
#
check_c_compiler_flag(-xldscope=hidden XLDSCOPEHIDDEN)
if(XLDSCOPEHIDDEN)
set(CMAKE_C_FLAGS "-xldscope=hidden ${CMAKE_C_FLAGS}")
else()
#
# Anything else?
# If there is anything else, we might want to
# make a list of options to try, and try them
# in a loop.
#
message(WARNING "Hiding shared library symbols is not supported by the compiler."
" All shared library symbols will be exported.")
endif()
endif()
endif()
include(CheckCLinkerFlag)
if(NOT CMAKE_C_COMPILER_ID MATCHES "MSVC" AND NOT OSS_FUZZ)
#
# The -pie linker option produces a position-independent executable.
# Some Linux distributions have this enabled by default in the compiler,
# so setting it here will be superfluous though.
#
# Note that linking with static libraries that are not position
# independent may fail, the user can set CMAKE_EXE_LINKER_FLAGS=-no-pie
# as a workaround.
#
check_c_linker_flag(-pie LINK_pie_VALID)
if(LINK_pie_VALID)
set(CMAKE_EXE_LINKER_FLAGS "-pie ${CMAKE_EXE_LINKER_FLAGS}")
endif()
endif()
foreach(THIS_FLAG ${WIRESHARK_LD_FLAGS})
string(MAKE_C_IDENTIFIER "LINK${THIS_FLAG}_VALID" _flag_var)
check_c_linker_flag(${THIS_FLAG} ${_flag_var})
if (${_flag_var})
set(WS_LINK_FLAGS "${WS_LINK_FLAGS} ${THIS_FLAG}")
endif()
endforeach()
message(STATUS "Linker flags: ${WS_LINK_FLAGS}")
if(APPLE AND EXISTS /usr/local/opt/gettext)
# GLib on macOS requires libintl. Homebrew installs gettext (and
# libintl) in /usr/local/opt/gettext
include_directories(/usr/local/opt/gettext/include)
link_directories(/usr/local/opt/gettext/lib)
endif()
# The packagelist is doing some magic: If we add XXX to the packagelist, we
# - may optionally set XXX_OPTIONS to pass to the find_package command
# - will call FindXXX.cmake or find_package
# - return found libraries in XXX_LIBRARIES
# - return found include in XXX_INCLUDE_DIRS
# - set HAVE_XXX
# The minimum package list
set(PACKAGELIST Git GLIB2 GMODULE2 GTHREAD2 GCRYPT LEX YACC Perl PythonInterp)
set(LEX_OPTIONS REQUIRED)
set(GLIB2_OPTIONS REQUIRED)
set(GLIB2_FIND_OPTIONS REQUIRED)
set(GLIB2_MIN_VERSION 2.32.0)
set(GTHREAD2_OPTIONS REQUIRED)
set(GCRYPT_OPTIONS "1.4.2" REQUIRED)
set(Perl_OPTIONS REQUIRED)
set(PythonInterp_OPTIONS "3.4" REQUIRED)
set(YACC_OPTIONS REQUIRED)
if (NOT WIN32)
set(PACKAGELIST ${PACKAGELIST} Gettext M)
set(M_OPTIONS REQUIRED)
endif()
set(PACKAGELIST ${PACKAGELIST} LIBSSH)
set(LIBSSH_OPTIONS "0.6")
if(ENABLE_PCAP)
set(PACKAGELIST ${PACKAGELIST} PCAP)
endif()
if(ENABLE_AIRPCAP)
set(PACKAGELIST ${PACKAGELIST} AIRPCAP)
endif()
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
set(PACKAGELIST ${PACKAGELIST} Systemd)
endif()
# Build the Qt GUI?
if(BUILD_wireshark)
# Untested, may not work if CMAKE_PREFIX_PATH gets overwritten
# somewhere. The if WIN32 in this place is annoying as well.
if( WIN32 )
set( QT5_BASE_PATH "$ENV{QT5_BASE_DIR}" )
set( CMAKE_PREFIX_PATH "${QT5_BASE_PATH}" )
endif()
list (INSERT QT_FIND_PACKAGE_OPTIONS 0 REQUIRED)
set(PACKAGELIST ${PACKAGELIST}
Qt5Core
Qt5LinguistTools
Qt5Multimedia
Qt5PrintSupport
Qt5Svg
Qt5Widgets
)
set(Qt5Core_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
set(Qt5LinguistTools_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
set(Qt5Multimedia_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
set(Qt5PrintSupport_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
set(Qt5Svg_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
set(Qt5Widgets_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
if (APPLE)
set(PACKAGELIST ${PACKAGELIST} Qt5MacExtras)
set(Qt5MacExtras_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
endif()
if( WIN32 )
set(PACKAGELIST ${PACKAGELIST} Qt5WinExtras)
set(Qt5WinExtras_OPTIONS ${QT_FIND_PACKAGE_OPTIONS})
endif()
endif()
# MaxMind DB address resolution
if(BUILD_mmdbresolve)
set(PACKAGELIST ${PACKAGELIST} MaxMindDB)
endif()
# SMI SNMP