#
# We need 3.12 or later, so that we can set policy CMP0074; see
# below.
+ #
cmake_minimum_required(VERSION 3.12)
else(WIN32)
#
- # For now, require only 2.8.6, just in case somebody is
+ # For now, require only 2.8.12, just in case somebody is
# configuring with CMake on a "long-term support" version
# of some OS and that version supplies an older version of
# CMake.
# environment variable when running pkg-config, to make sure
# it finds any .pc file from there.
#
- cmake_minimum_required(VERSION 2.8.6)
+ cmake_minimum_required(VERSION 2.8.12)
endif(WIN32)
#
cmake_policy(SET CMP0074 NEW)
endif()
+#
+# OK, this is a pain.
+#
+# When building on NetBSD, with a libpcap installed from pkgsrc,
+# a -Wl,-rpath,/usr/pkg/lib option is added to the options when
+# linking tcpdump. This puts /usr/pkg/lib into the run-time path.
+#
+# However, by default, CMake adds a rule to the install CMake script
+# a CMake command (using an undocumented subcommand of file()) that
+# strips /usr/pkg/lib *out* of the run-time path; the message in the
+# output for the "install" target is
+#
+# -- Set runtime path of "{target-directory}/tcpdump" to ""
+#
+# I am not certain what the rationale is for doing this, but a
+# *consequence* of this is that, when you run the installed tcpdump,
+# it fails to find libpcap.so:
+#
+# $ {target-directory}/tcpdump -h
+# {target-directory}/tcpdump: Shared object "libpcap.so.0" not found
+#
+# It also appears to be the case that, on Ubuntu 22.04, FreeBSD 12,
+# DragonFly BSD 5.8, OpenBSD 6.6, and Solaris 11.4,
+#
+# On Ubuntu and Solaris, even if you have a libpcap in /usr/local, you
+# have to provide not only -I/usr/local/include and -L/usr/local/lib,
+# you also must provide -Wl,-rpath,/usr/local/lib in order to have
+# the run-time linker look in /usr/local/lib for libpcap. If it's not
+# specified, then, if the shared library major version number of the
+# libpcap in /usr/lib is the same as the shared major version number
+# of the libpcap in /usr/local/lib, the run-time linker will find the
+# libpcap in /usr/lib; if the versions are different, the run-time
+# linker will fail to find the libpcap in /usr/lib, so the program will
+# fail to run.
+#
+# We suppress this by setting CMAKE_INSTALL_RPATH_USE_LINK_PATH to TRUE;
+# as the documentation for that variable says:
+#
+# Add paths to linker search and installed rpath.
+#
+# CMAKE_INSTALL_RPATH_USE_LINK_PATH is a boolean that if set to True
+# will append to the runtime search path (rpath) of installed
+# binaries any directories outside the project that are in the linker
+# search path or contain linked library files. The directories are
+# appended after the value of the INSTALL_RPATH target property.
+#
+# If, for whatever reason, directories in which we search for external
+# libraries, other than the standard system library directories, are
+# added to the executable's rpath in the build process, we most
+# defintely want them in the installed image's rpath if they are
+# necessary in order to find the libraries at run time.
+#
+set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+
set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
#
-# OK, this is a royal pain.
+# We explicitly indicate what languages are used in tcpdump to avoid
+# checking for a C++ compiler.
+#
+# One reason to avoid that check is that there's no need to waste
+# configuration time performing it.
+#
+# Another reason is that:
#
# CMake will try to determine the sizes of some data types, including
# void *, early in the process of configuration; apparently, it's done
# building 32-bit, the size for C++ will win, and, again, hilarity
# will ensue.
#
-# So we *explicitly* state that only C is used; there is currently no
-# C++ code in tcpdump.
-#
project(tcpdump C)
#
if(HAVE_RPC_RPC_H)
check_include_files("rpc/rpc.h;rpc/rpcent.h" HAVE_RPC_RPCENT_H)
endif(HAVE_RPC_RPC_H)
-if(NOT WIN32)
- check_include_files("sys/types.h;sys/socket.h;net/if.h;net/pfvar.h" HAVE_NET_PFVAR_H)
- if(HAVE_NET_PFVAR_H)
- check_include_files("sys/types.h;sys/socket.h;net/if.h;net/pfvar.h;net/if_pflog.h" HAVE_NET_IF_PFLOG_H)
- if(HAVE_NET_IF_PFLOG_H)
- set(LOCALSRC print-pflog.c ${LOCALSRC})
- endif(HAVE_NET_IF_PFLOG_H)
- endif(HAVE_NET_PFVAR_H)
-endif(NOT WIN32)
#
# Functions.
#
check_function_exists(strlcat HAVE_STRLCAT)
check_function_exists(strlcpy HAVE_STRLCPY)
-check_function_exists(strdup HAVE_STRDUP)
check_function_exists(strsep HAVE_STRSEP)
#
if(LIBNSL_HAS_GETHOSTBYADDR)
set(TCPDUMP_LINK_LIBRARIES ${TCPDUMP_LINK_LIBRARIES} nsl)
else(LIBNSL_HAS_GETHOSTBYADDR)
- message(FATAL_ERROR "gethostbyaddr is required, but wasn't found")
+ check_library_exists(network gethostbyaddr "" LIBNETWORK_HAS_GETHOSTBYADDR)
+ if(LIBNETWORK_HAS_GETHOSTBYADDR)
+ set(TCPDUMP_LINK_LIBRARIES ${TCPDUMP_LINK_LIBRARIES} network)
+ else(LIBNETWORK_HAS_GETHOSTBYADDR)
+ message(FATAL_ERROR "gethostbyaddr is required, but wasn't found")
+ endif(LIBNETWORK_HAS_GETHOSTBYADDR)
endif(LIBNSL_HAS_GETHOSTBYADDR)
endif(LIBSOCKET_HAS_GETHOSTBYADDR)
endif(NOT STDLIBS_HAVE_GETHOSTBYADDR)
cmake_pop_check_state()
#
-# Make sure we have vsnprintf() and snprintf(); we require them.
-# We use check_symbol_exists(), as they aren't necessarily external
-# functions - in Visual Studio, for example, they're inline functions
-# calling a common external function.
+# Make sure we have snprintf(); we require it.
+# We use check_symbol_exists(), as it isn't necessarily an external
+# function - in Visual Studio, for example, it is an inline function
+# calling an external function.
#
-check_symbol_exists(vsnprintf "stdio.h" HAVE_VSNPRINTF)
-if(NOT HAVE_VSNPRINTF)
- message(FATAL_ERROR "vsnprintf() is required but wasn't found")
-endif(NOT HAVE_VSNPRINTF)
check_symbol_exists(snprintf "stdio.h" HAVE_SNPRINTF)
if(NOT HAVE_SNPRINTF)
message(FATAL_ERROR "snprintf() is required but wasn't found")
endif()
+#
+# Require a proof of suitable snprintf(3), same as in Autoconf.
+#
+include(CheckCSourceRuns)
+check_c_source_runs("
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/types.h>
+
+int main()
+{
+ char buf[100];
+ uint64_t t = (uint64_t)1 << 32;
+
+ snprintf(buf, sizeof(buf), \"%zu\", sizeof(buf));
+ if (strncmp(buf, \"100\", sizeof(buf)))
+ return 1;
+
+ snprintf(buf, sizeof(buf), \"%zd\", -sizeof(buf));
+ if (strncmp(buf, \"-100\", sizeof(buf)))
+ return 2;
+
+ snprintf(buf, sizeof(buf), \"%\" PRId64, -t);
+ if (strncmp(buf, \"-4294967296\", sizeof(buf)))
+ return 3;
+
+ snprintf(buf, sizeof(buf), \"0o%\" PRIo64, t);
+ if (strncmp(buf, \"0o40000000000\", sizeof(buf)))
+ return 4;
+
+ snprintf(buf, sizeof(buf), \"0x%\" PRIx64, t);
+ if (strncmp(buf, \"0x100000000\", sizeof(buf)))
+ return 5;
+
+ snprintf(buf, sizeof(buf), \"%\" PRIu64, t);
+ if (strncmp(buf, \"4294967296\", sizeof(buf)))
+ return 6;
+
+ return 0;
+}
+
+"
+ SUITABLE_SNPRINTF
+)
+if(NOT SUITABLE_SNPRINTF)
+ message(FATAL_ERROR
+"The snprintf(3) implementation in this libc is not suitable,
+tcpdump would not work correctly even if it managed to compile."
+ )
+endif()
+
check_function_exists(getopt_long HAVE_GETOPT_LONG)
-check_function_exists(strftime HAVE_STRFTIME)
check_function_exists(setlinebuf HAVE_SETLINEBUF)
#
# For Windows, don't need to waste time checking for fork() or vfork().
#
#
-# Check for IPv6 support.
-# We just check for AF_INET6 and struct in6_addr.
+# FIXME: This check does not influence the build logic, but without it CMake
+# 3.18.4 fails trying to make the next check_type_size() check later on.
#
-cmake_push_check_state()
-if(WIN32)
- set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h ws2tcpip.h)
- check_symbol_exists(AF_INET6 "sys/types.h;ws2tcpip.h" HAVE_AF_INET6)
-else(WIN32)
- set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/socket.h netinet/in.h)
- check_symbol_exists(AF_INET6 "sys/types.h;sys/socket.h;netinet/in.h" HAVE_AF_INET6)
-endif(WIN32)
check_type_size("struct in6_addr" HAVE_STRUCT_IN6_ADDR)
-cmake_pop_check_state()
-if(HAVE_AF_INET6 AND HAVE_STRUCT_IN6_ADDR)
- set(HAVE_OS_IPV6_SUPPORT TRUE)
-endif(HAVE_AF_INET6 AND HAVE_STRUCT_IN6_ADDR)
######################################
# External dependencies
print-ospf.c
print-ospf6.c
print-otv.c
+ print-pflog.c
print-pgm.c
print-pim.c
print-pktap.c
#
# Replace missing functions
#
-foreach(FUNC strlcat strlcpy strdup strsep getservent getopt_long)
+foreach(FUNC strlcat strlcpy strsep getservent getopt_long)
string(TOUPPER ${FUNC} FUNC_UPPERCASE)
set(HAVE_FUNC_UPPERCASE HAVE_${FUNC_UPPERCASE})
if(NOT ${HAVE_FUNC_UPPERCASE})
*.h
)
+#
+# Assume, by default, no support for shared libraries and V7/BSD
+# convention for man pages (devices in section 4, file formats in
+# section 5, miscellaneous info in section 7, administrative commands
+# and daemons in section 8). Individual cases can override this.
+# Individual cases can override this.
+#
+set(MAN_FILE_FORMATS 5)
+set(MAN_MISC_INFO 7)
+if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
+ # Workaround to enable certain features
+ set(_SUN TRUE)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "HP-UX")
+ #
+ # Use System V conventions for man pages.
+ #
+ set(MAN_FILE_FORMATS 4)
+ set(MAN_MISC_INFO 5)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "IRIX" OR CMAKE_SYSTEM_NAME STREQUAL "IRIX64")
+ #
+ # Use IRIX conventions for man pages; they're the same as the
+ # System V conventions, except that they use section 8 for
+ # administrative commands and daemons.
+ #
+ set(MAN_FILE_FORMATS 4)
+ set(MAN_MISC_INFO 5)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "OSF1")
+ #
+ # DEC OSF/1, a/k/a Digital UNIX, a/k/a Tru64 UNIX.
+ # Use Tru64 UNIX conventions for man pages; they're the same as the
+ # System V conventions except that they use section 8 for
+ # administrative commands and daemons.
+ #
+ set(MAN_FILE_FORMATS 4)
+ set(MAN_MISC_INFO 5)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
+ #
+ # SunOS 5.x.
+ #
+ if(CMAKE_SYSTEM_VERSION STREQUAL "5.12")
+ else()
+ #
+ # Use System V conventions for man pages.
+ #
+ set(MAN_FILE_FORMATS 4)
+ set(MAN_MISC_INFO 5)
+ endif()
+endif()
+
source_group("Source Files" FILES ${PROJECT_SOURCE_LIST_C})
source_group("Header Files" FILES ${PROJECT_SOURCE_LIST_H})
projects / tcpdump / blobdiff