# ConfigureChecks.cmake
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
include(CMakePushCheckState)
#check system for includes
include(CheckIncludeFile)
include(CheckIncludeFiles)
check_include_file("arpa/inet.h" HAVE_ARPA_INET_H)
check_include_file("grp.h" HAVE_GRP_H)
#
# This may require <sys/types.h> to be included
#
check_include_files("sys/types.h;ifaddrs.h" HAVE_IFADDRS_H)
check_include_file("netinet/in.h" HAVE_NETINET_IN_H)
check_include_file("netdb.h" HAVE_NETDB_H)
check_include_file("pwd.h" HAVE_PWD_H)
check_include_file("sys/select.h" HAVE_SYS_SELECT_H)
check_include_file("sys/socket.h" HAVE_SYS_SOCKET_H)
check_include_file("sys/time.h" HAVE_SYS_TIME_H)
check_include_file("sys/utsname.h" HAVE_SYS_UTSNAME_H)
check_include_file("sys/wait.h" HAVE_SYS_WAIT_H)
check_include_file("unistd.h" HAVE_UNISTD_H)
check_include_file("valgrind/valgrind.h" HAVE_VALGRIND_H)
# Check that the C compiler works on a trivial program.
# Do this early on before more specific tests so we can give
# an appropriate error message.
if(NOT CMAKE_CROSSCOMPILING)
check_c_source_runs("
int main(void)
{
return 0;
}
"
COMPILER_RUNS
)
if(NOT COMPILER_RUNS)
if(WIN32)
message(FATAL_ERROR
"${CMAKE_C_COMPILER} failed to compile and run a trivial test program. \
This is likely a permissions error or the result of security software like \
Windows Defender preventing untrusted code from running."
)
else()
message(FATAL_ERROR
"${CMAKE_C_COMPILER} failed to compile and run a trivial test program. \
This is likely a permissions error or the result of security software \
preventing untrusted code from running."
)
endif()
endif()
endif()
#
# On Linux, check for some additional headers, which we need as a
# workaround for a bonding driver bug and for libpcap's current lack
# of its own workaround for that bug.
#
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
#
# Those header files require <sys/socket.h>.
#
check_c_source_compiles(
"#include <sys/socket.h>
#include <linux/sockios.h>
int main(void)
{
return 0;
}"
HAVE_LINUX_SOCKIOS_H
)
check_c_source_compiles(
"#include <sys/socket.h>
#include <linux/if_bonding.h>
int main(void)
{
return 0;
}"
HAVE_LINUX_IF_BONDING_H
)
endif()
#
# OHOS: HarmonyOS header and feature checks
#
if(CMAKE_SYSTEM_NAME STREQUAL "OHOS")
# OHOS supports basic POSIX headers
set(HAVE_ARPA_INET_H 1)
set(HAVE_NETINET_IN_H 1)
set(HAVE_NETDB_H 1)
set(HAVE_SYS_SELECT_H 1)
set(HAVE_SYS_SOCKET_H 1)
set(HAVE_SYS_TIME_H 1)
set(HAVE_SYS_UNAME_H 1)
set(HAVE_SYS_WAIT_H 1)
set(HAVE_UNISTD_H 1)
# OHOS: ifaddrs may not be available in all versions, check it
check_include_files("sys/types.h;ifaddrs.h" HAVE_IFADDRS_H)
# OHOS: no valgrind support
set(HAVE_VALGRIND_H 0)
# OHOS: no Linux-specific headers
set(HAVE_LINUX_SOCKIOS_H 0)
# OHOS: skip capabilities check
set(HAVE_CAP_LIB 0)
# OHOS: libnl not available
set(HAVE_LIBNL3 0)
set(HAVE_LIBNL2 0)
set(HAVE_LIBNL1 0)
endif()
#Functions
include(CheckFunctionExists)
include(CheckSymbolExists)
#
# Platform-specific functions used in platform-specific code.
# We check for them only on the platform on which we use them.
#
if(CMAKE_SYSTEM_NAME STREQUAL "HP-UX")
#
# HP-UX
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_DL_LIBS})
check_function_exists("dlget" HAVE_DLGET)
cmake_pop_check_state()
elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
#
# Solaris
#
check_function_exists("getexecname" HAVE_GETEXECNAME)
endif()
check_symbol_exists("clock_gettime" "time.h" HAVE_CLOCK_GETTIME)
# Some platforms (macOS pre 10.15) are non-conformant with C11 and lack timespec_get()
check_symbol_exists("timespec_get" "time.h" HAVE_TIMESPEC_GET)
if(NOT MSVC)
check_symbol_exists("localtime_r" "time.h" HAVE_LOCALTIME_R)
check_symbol_exists("gmtime_r" "time.h" HAVE_GMTIME_R)
check_symbol_exists("timegm" "time.h" HAVE_TIMEGM)
check_symbol_exists("tzset" "time.h" HAVE_TZSET)
check_symbol_exists("tzname" "time.h" HAVE_TZNAME)
check_symbol_exists("getline" "stdio.h" HAVE_GETLINE)
endif()
check_function_exists("getifaddrs" HAVE_GETIFADDRS)
check_function_exists("issetugid" HAVE_ISSETUGID)
check_function_exists("setresgid" HAVE_SETRESGID)
check_function_exists("setresuid" HAVE_SETRESUID)
if (APPLE)
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${APPLE_CORE_FOUNDATION_LIBRARY})
check_function_exists("CFPropertyListCreateWithStream" HAVE_CFPROPERTYLISTCREATEWITHSTREAM)
cmake_pop_check_state()
endif()
if(UNIX)
cmake_push_check_state()
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
check_symbol_exists("memmem" "string.h" HAVE_MEMMEM)
check_symbol_exists("memrchr" "string.h" HAVE_MEMRCHR)
check_symbol_exists("strerrorname_np" "string.h" HAVE_STRERRORNAME_NP)
check_symbol_exists("strptime" "time.h" HAVE_STRPTIME)
check_symbol_exists("vasprintf" "stdio.h" HAVE_VASPRINTF)
cmake_pop_check_state()
endif()
#Struct members
include(CheckStructHasMember)
check_struct_has_member("struct stat" st_blksize sys/stat.h HAVE_STRUCT_STAT_ST_BLKSIZE)
check_struct_has_member("struct stat" st_birthtime sys/stat.h HAVE_STRUCT_STAT_ST_BIRTHTIME)
check_struct_has_member("struct stat" __st_birthtime sys/stat.h HAVE_STRUCT_STAT___ST_BIRTHTIME)
check_struct_has_member("struct tm" tm_zone time.h HAVE_STRUCT_TM_TM_ZONE)
check_struct_has_member("struct tm" tm_gmtoff time.h HAVE_STRUCT_TM_TM_GMTOFF)
# Types
include(CheckTypeSize)
check_type_size("ssize_t" SSIZE_T)
# Unconditionally force use of 64-bit time_t on 32-bit platforms with glibc.
check_symbol_exists(__GLIBC__ "time.h" HAVE___GLIBC__)
if(HAVE___GLIBC__ AND CMAKE_SIZEOF_VOID_P EQUAL 4)
# _TIME_BITS=64 requires _FILE_OFFSET_BITS=64, which we should have
# already ensured is set by FindLFS, but this doesn't hurt
check_symbol_exists(_FILE_OFFSET_BITS "time.h" HAVE__FILE_OFFSET_BITS)
if (NOT HAVE__FILE_OFFSET_BITS)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_FILE_OFFSET_BITS=64)
endif()
check_symbol_exists(_TIME_BITS "time.h" HAVE__TIME_BITS)
if (NOT HAVE__TIME_BITS)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_TIME_BITS=64)
endif()
endif()
# Do we want to eventually just fail for non Y2038 compliant hosts (or all
# less than 64-bit time_t hosts, if we don't want to consider theoretical
# cases like unsigned 32 bit time_t?)
# The only way to truly test this is to compile a program, especially
# due to multiple architectures.
#check_type_size("time_t" TIME_T_SIZE)
#if(TIME_T_SIZE_64 EQUAL 0)
# message("multiple architectures with possibly different time_t sizes.")
#elseif(TIME_T_SIZE_64 LESS 8)
# message(FATAL_ERROR "time_t is less than 64-bit")
#endif()
#
# Check if the libc vsnprintf() conforms to C99. If this fails we may
# need to fall-back on GLib I/O.
#
# If cross-compiling we can't check so just assume this requirement is met.
#
if(NOT CMAKE_CROSSCOMPILING)
check_c_source_runs("
#include <stdio.h>
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored \"-Wall\"
int main(void)
{
/* Check that snprintf() and vsnprintf() don't return
* -1 if the buffer is too small. C99 says this value
* is the length that would be written not including
* the nul byte. */
char buf[3];
return snprintf(buf, sizeof(buf), \"%s\", \"ABCDEF\") > 0 ? 0 : 1;
}
#pragma GCC diagnostic pop"
HAVE_C99_VSNPRINTF
)
if (NOT HAVE_C99_VSNPRINTF)
message(FATAL_ERROR
"Building Wireshark requires a C99 compliant vsnprintf() and this \
target does not meet that requirement. Compiling for ${CMAKE_SYSTEM} \
using ${CMAKE_C_COMPILER_ID}. Please report this issue to the Wireshark \
developers at wireshark-dev@wireshark.org."
)
endif()
endif()
#
# *If* we found libnl, check if we can use nl80211 stuff with it.
#
if (NL_FOUND)
# Base set of necessary features
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
int x = NL80211_FREQUENCY_ATTR_MAX_TX_POWER;
x |= NL80211_ATTR_SUPPORTED_IFTYPES;
x |= NL80211_ATTR_SUPPORTED_COMMANDS;
x |= NL80211_ATTR_WIPHY_FREQ;
x |= NL80211_CHAN_NO_HT;
(void)x;
}"
HAVE_NL80211
)
# Check for optional features. At some point we can move the
# older ones to mandatory.
# SET_CHANNEL, Linux kernel 2.6.35 (August 2010)
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
enum nl80211_commands x = NL80211_CMD_SET_CHANNEL;
}"
HAVE_NL80211_CMD_SET_CHANNEL
)
# SPLIT_WIPHY_DUMP, Linux kernel 3.10 (June 2013)
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
enum nl80211_protocol_features x = NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP;
}"
HAVE_NL80211_SPLIT_WIPHY_DUMP
)
# VHT_CAPABILITY, Linux kernel 3.8 (February 2013)
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
enum nl80211_attrs x = NL80211_ATTR_VHT_CAPABILITY;
}"
HAVE_NL80211_VHT_CAPABILITY
)
# HE_CAPABILITY, Linux kernel 4.19 (October 2018)
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
enum nl80211_attrs x = NL80211_ATTR_HE_CAPABILITY;
}"
HAVE_NL80211_HE_CAPABILITY
)
# EHT_CAPABILITY, Linux kernel 5.18 (May 2022)
check_c_source_compiles(
"#include <linux/nl80211.h>
int main(void) {
enum nl80211_attrs x = NL80211_ATTR_EHT_CAPABILITY;
}"
HAVE_NL80211_EHT_CAPABILITY
)
endif()
#
# Editor modelines - https://www.wireshark.org/tools/modelines.html
#
# Local variables:
# c-basic-offset: 8
# tab-width: 8
# indent-tabs-mode: t
# End:
#
# vi: set shiftwidth=8 tabstop=8 noexpandtab:
# :indentSize=8:tabSize=8:noTabs=false:
#