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configure.ac
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configure.ac
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#
# Autoconf script for Wireshark
#
#
# Define variables for the components of the Wireshark version number.
#
m4_define([version_major], [2])
m4_define([version_minor], [3])
m4_define([version_micro], [0])
dnl Updated by make-version.pl
m4_define([version_extra], [])
m4_define([version_micro_extra], m4_join([], version_micro, version_extra))
AC_INIT(Wireshark, [version_major.version_minor.version_micro_extra], http://bugs.wireshark.org/, , http://www.wireshark.org/)
CONFIG_ARGS="$*"
AC_SUBST(CONFIG_ARGS)
# Minimum autoconf version we require.
AC_PREREQ(2.64)
# Variable expansion doesn't work in AC_PREREQ()
AC_MIN_VERSION=2.64
AC_SUBST(AC_MIN_VERSION)
dnl Make sure to keep ACLOCAL_AMFLAGS in Makefile.am and AC_CONFIG_MACRO_DIRS
dnl in configure.ac in sync, otherwise there will be an error running autogen.sh.
m4_ifdef([AC_CONFIG_MACRO_DIRS],[AC_CONFIG_MACRO_DIRS([m4])])
dnl Check for CPU / vendor / OS
dnl The user is encouraged to use either `AC_CANONICAL_BUILD', or
dnl `AC_CANONICAL_HOST', or `AC_CANONICAL_TARGET', depending on the
dnl needs. Using `AC_CANONICAL_TARGET' is enough to run the two other
dnl macros.
dnl
dnl As nothing in the Wireshark is itself a build tool (we are not,
dnl for example, a compiler that generates machine code), we probably
dnl don't need AC_CANONICAL_TARGET, so, in theory, we should be able
dnl to use AC_CANONICAL_BUILD and AC_CANONICAL_HOST - or perhaps just
dnl AC_CANONICAL_HOST - instead. Note that we do have tools, such as
dnl lemon, that need to be built for the build machine, not for the
dnl host machine, so we might need both.
dnl
dnl This has to be done *after* AC_INIT, otherwise autogen.sh fails.
dnl AC_CANONICAL_BUILD
dnl AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AM_INIT_AUTOMAKE([1.11 tar-ustar dist-xz no-dist-gzip subdir-objects])
# Enable silent builds by default. Verbose builds can be enabled with "./configure
# --enable-silent-rules ..." or "make V=1 ..."
AM_SILENT_RULES([yes])
# Make Wireshark's version available in config.h
AC_DEFINE(VERSION_MAJOR, version_major, [Wireshark's major version])
AC_DEFINE(VERSION_MINOR, version_minor, [Wireshark's minor version])
AC_DEFINE(VERSION_MICRO, version_micro, [Wireshark's micro version])
AC_DEFINE_UNQUOTED(VERSION_FLAVOR,
["${WIRESHARK_VERSION_FLAVOR:-"Development Build"}"], [Wireshark's package flavor])
LT_PREREQ([2.2.2])
LT_INIT([disable-static dlopen])
AC_SUBST([LIBTOOL_DEPS])
AC_CONFIG_LIBOBJ_DIR([wsutil])
#
# Checks for programs used in the main build process.
#
# See doc/README.developer for allowed C99 features
#
AC_PROG_CC_C99
if test "$ac_cv_prog_cc_c99" = "no"
then
AC_MSG_ERROR([The C compiler does not support C99])
fi
AC_PROG_CPP
AC_PROG_CXX
if test ! -z "$CXX"; then
#
# OK, we found something AC_LANG_CXX thinks is a C++ compiler,
# but is it one?
#
# Some UN*Xes have, by default, a case-insensitive file
# system, and AC_PROG_CXX looks for, among other things,
# "CC" as a C++ compiler, and, if you have a case-insensitive
# file system and a C compiler named "cc" (both true, by
# default, on macOS), AC_PROG_CXX may end up thinking it's
# the C++ compiler.
#
# So we check by feeding the purported C++ compiler a
# program using C++ features (iostream).
#
AC_MSG_CHECKING(whether $CXX is a C++ compiler)
AC_LANG_PUSH([C++])
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[
#include <iostream>
],
[
std::cout << "Hello World! ";
return 0;
])],
[AC_MSG_RESULT(yes)],
[
AC_MSG_RESULT(no)
CXX=""
])
AC_LANG_POP([C++])
fi
# Qt 5.7 or later requires C++11
AS_IF([test -n "$CXX"],
[AX_CXX_COMPILE_STDCXX([11], [noext], [optional])])
# Set CC_FOR_BUILD (the *local* gcc to use for building e.g. lemon)
if test "x$cross_compiling" = xno -a -z "$CC_FOR_BUILD"; then
CC_FOR_BUILD="$CC"
fi
AX_PROG_CC_FOR_BUILD
#
# Check for versions of "sed" inadequate to handle, in libtool, a list
# of object files as large as the list in Wireshark.
#
AC_PROG_SED
AC_PROG_LN_S
AC_PROG_MKDIR_P
AC_PATH_PROG(PERL, perl)
# Check for Python.
AC_PATH_PROGS(PYTHON, python python3)
if test ! -z "$PYTHON"; then
#
# OK, we found Python; is it Python 2.5 or later?
# Note: we don't use named components for sys.version_info to get
# the major version number, as named components for version_info
# were apparently introduced in Python 2.7.
#
AC_MSG_CHECKING([whether $PYTHON is Python 2.5 or later])
python_major_version=`$PYTHON -c 'import sys; print (sys.version_info[[0]])'`
python_minor_version=`$PYTHON -c 'import sys; print (sys.version_info[[1]])'`
if test "$python_major_version" -eq 2 -a "$python_minor_version" -lt 5 ; then
AC_MSG_RESULT(no)
AC_MSG_WARN([Building with Python $python_major_version.$python_minor_version may not work])
else
AC_MSG_RESULT(yes)
fi
else
AC_MSG_ERROR(I couldn't find python; make sure it's installed and in your path)
fi
dnl
dnl Check for yacc/lex. Distribution tarballs include generated source,
dnl in which case these tools are not a mandatory requirement to build.
dnl
AC_PROG_YACC
AS_IF([test "x$YACC" = xyacc], [AS_UNSET(YACC)])
AS_IF([test -z "$YACC" -a ! -f $srcdir/wiretap/ascend.c],
[AC_MSG_ERROR([I couldn't find bison or byacc; make sure it's installed and in your path])])
AM_MISSING_PROG(YACC, bison)
AC_PROG_LEX
AS_IF([test "x$LEX" != xflex], [AS_UNSET(LEX)])
AS_IF([test -z "$LEX" -a ! -f $srcdir/wiretap/ascend_scanner.c],
[AC_MSG_ERROR([I couldn't find flex; make sure it's installed and in your path])])
AM_MISSING_PROG(LEX, flex)
AC_PATH_PROG(POD2MAN, pod2man)
if test "x$POD2MAN" = x
then
#
# The alternative is not to build the man pages....
#
AC_MSG_ERROR(I couldn't find pod2man; make sure it's installed and in your path)
fi
AC_PATH_PROG(POD2HTML, pod2html)
if test "x$POD2HTML" = x
then
#
# The alternative is not to build the HTML man pages....
#
AC_MSG_ERROR(I couldn't find pod2html; make sure it's installed and in your path)
fi
#
# Set "ac_supports_gcc_flags" if the compiler is known to support GCC-style
# flags such as -pedantic, -W warning flags and -f feature flags. Currently,
# we assume GCC and clang do; other compilers should be added here.
#
# This is done to avoid getting tripped up by compilers that support
# those flags but give them a different meaning.
#
if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then
ac_supports_gcc_flags=yes
fi
# Check for doxygen
AC_PATH_PROG(DOXYGEN, doxygen)
AC_CHECK_PROG(HAVE_DOXYGEN, doxygen, "yes", "no")
AM_CONDITIONAL(HAVE_DOXYGEN, test x$HAVE_DOXYGEN = xyes)
#
# Check for pkg-config and set PKG_CONFIG accordingly.
#
# This is referenced via AC_REQUIRE([PKG_PROG_PKG_CONFIG] in some macros
# like PKG_CHECK_MODULES. If the first call to such a macro is under an
# "if" statement, it's safer to call PKG_PROG_PKG_CONFIG directly, see
# the comments in acolocal.m4
#
# We want version 0.7 or better. (XXX - explain why. Is that just
# because our Qt tests were originally based on AM_PATH_GTK, and *it*
# requires 0.7 or better?)
#
PKG_PROG_PKG_CONFIG(0.7)
if test -z "$PKG_CONFIG"; then
AC_MSG_ERROR(I couldn't find pkg-config; make sure it's installed and in your path)
fi
#
# Add configure argument to select macOS deployment target.
#
AC_WIRESHARK_OSX_DEPLOY_TARGET
#
# Try to arrange for large file support.
#
AC_SYS_LARGEFILE
#
# Check if we need to link with libm
#
AC_SEARCH_LIBS([cos], [m])
#
# Check for C99 math functions.
#
AC_CHECK_FUNCS([floorl lrint])
#
# Check if we need to link with -lnsl and -lsocket
#
AX_LIB_SOCKET_NSL
#
# GUI toolkit options
#
AC_ARG_WITH([qt],
AC_HELP_STRING( [--with-qt=@<:@yes/no/4/5@:>@],
[use Qt @<:@default=yes, if available@:>@]),
with_qt="$withval", with_qt="unspecified")
AC_ARG_WITH([gtk],
AC_HELP_STRING( [--with-gtk=@<:@yes/no/2/3@:>@],
[use GTK+ @<:@default=no@:>@]),
AS_CASE([$withval],
[yes], [with_gtk="3 2 fail"],
[no], [with_gtk="no"],
[3], [with_gtk="3 fail3"],
[2], [with_gtk="2 fail2"],
[AC_MSG_ERROR([--with-gtk must be one of yes/no/2/3])]),
with_gtk="no")
# GnuTLS
# Version 3.0 switched from LGPLv2.1+ to LGPLv3+, then switched back to
# LGPLv2.1+ in version 3.1.10.
# GnuTLS depends on GMP which switched from LGPLv2.1+ to LGPLv3+ in
# version 4.2.2, the switched to LGPLv3+ / GPLv2+ in version 6.0.0.
tls_message="no"
want_gnutls="if_available"
AC_ARG_WITH([gnutls],
AC_HELP_STRING( [--with-gnutls=@<:@yes/no@:>@],
[use GnuTLS library @<:@default=yes, if available@:>@]),
[ with_gnutls="$withval"; want_gnutls="yes" ], with_gnutls="yes")
if test "x$with_gnutls" = "xyes"; then
have_license_compatible_gnutls="no"
PKG_CHECK_MODULES([LIBGNUTLS], [gnutls >= 3.1.10 ],
[ have_license_compatible_gnutls="yes" ], [ echo "GnuTLS >= 3.1.10 not found " ]
)
if test "x$have_license_compatible_gnutls" != "xyes"; then
PKG_CHECK_MODULES([LIBGNUTLS], [gnutls >= 2.12.0 gnutls < 3],
[ have_license_compatible_gnutls="yes" ] , [ echo "GnuTLS >= 2.12.0, < 3.0 not found " ]
)
fi
if test "x$have_license_compatible_gnutls" != "xyes"; then
if test "x$want_gnutls" = "xyes"; then
AC_MSG_ERROR([GnuTLS crypto library was requested, but is not available])
else
AS_ECHO(["GnuTLS with compatible license not found, disabling SSL decryption"])
fi
else
AC_DEFINE(HAVE_LIBGNUTLS, 1, [Define to use GnuTLS library])
tls_message="yes"
fi
fi
# libgrypt (for decryption, MAC, etc. functionality).
AM_PATH_LIBGCRYPT(1.4.2, [ ] , [
AC_MSG_ERROR([[libgcrypt not found; install libgcrypt-devel package for your system]])
])
AC_ARG_WITH(libnl,
AC_HELP_STRING([--with-libnl@<:@=VERSION@:>@],
[use libnl (force version VERSION, if supplied) @<:@default: yes, if available@:>@]),
[
if test "x$withval" = "xno"
then
want_libnl=no
elif test "x$withval" = "xyes"
then
want_libnl=yes
libnl_version=any
elif test "x$withval" = "x1"
then
want_libnl=yes
libnl_version=1
elif test "x$withval" = "x2"
then
want_libnl=yes
libnl_version=2
elif test "x$withval" = "x3"
then
want_libnl=yes
libnl_version=3
else
AC_MSG_ERROR(["$withval" is not a valid argument to --with-libnl])
fi
],[
#
# Use libnl if it's present, otherwise don't.
#
want_libnl=ifavailable
libnl_version=any
])
#
# Libnl is Linux-specific.
#
libnl_message="no"
case "$host_os" in
linux*)
AC_MSG_CHECKING(whether to use libnl for various network interface purposes)
if test x$want_libnl = "xno"; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
#
# Test for specific libnl versions only if no version
# was specified by the user or if the version in question
# was requested by the user.
#
if test x$libnl_version = "xany" -o x$libnl_version = "x3"; then
PKG_CHECK_EXISTS([libnl-3.0 libnl-route-3.0 libnl-genl-3.0], [have_libnl3=yes], [have_libnl3=no])
fi
if test x$libnl_version = "xany" -o x$libnl_version = "x2"; then
PKG_CHECK_EXISTS([libnl-2.0], [have_libnl2=yes], [have_libnl2=no])
fi
if test x$libnl_version = "xany" -o x$libnl_version = "x1"; then
PKG_CHECK_EXISTS([libnl-1], [have_libnl1=yes], [have_libnl1=no])
fi
if (test "${have_libnl3}" = "yes"); then
PKG_WIRESHARK_CHECK_SYSTEM_MODULES([LIBNL], [libnl-3.0 libnl-route-3.0 libnl-genl-3.0])
AC_DEFINE(HAVE_LIBNL, 1, [Enable libnl support])
AC_DEFINE(HAVE_LIBNL3, 1, [libnl version 3])
libnl_message="yes (v3)"
elif (test "${have_libnl2}" = "yes"); then
PKG_WIRESHARK_CHECK_SYSTEM_MODULES([LIBNL], [libnl-2.0])
AC_DEFINE(HAVE_LIBNL, 1, [Enable libnl support])
AC_DEFINE(HAVE_LIBNL2, 1, [libnl version 2])
libnl_message="yes (v2)"
elif (test "${have_libnl1}" = "yes"); then
PKG_WIRESHARK_CHECK_SYSTEM_MODULES([LIBNL], [libnl-1])
AC_DEFINE(HAVE_LIBNL, 1, [Enable libnl support])
AC_DEFINE(HAVE_LIBNL1, 1, [libnl version 1])
libnl_message="yes (v1)"
else
if test x$want_libnl = "xyes"; then
case "$libnl_version" in
any)
AC_MSG_ERROR("I couldn't find libnl even though you manually enabled it.")
;;
*)
AC_MSG_ERROR("I couldn't find libnl version $libnl_version even though you manually enabled it.")
;;
esac
fi
fi
fi
AC_MSG_CHECKING([if nl80211.h is new enough])
AC_TRY_COMPILE([#include <linux/nl80211.h>],
[int x = NL80211_FREQUENCY_ATTR_MAX_TX_POWER;
x |= NL80211_ATTR_SUPPORTED_IFTYPES;
x |= NL80211_ATTR_SUPPORTED_COMMANDS;
x |= NL80211_ATTR_WIPHY_FREQ;
x |= NL80211_CHAN_NO_HT;
(void)x;],
[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_NL80211, 1, [nl80211.h is new enough])],
[AC_MSG_RESULT(no)])
AC_MSG_CHECKING([for NL80211_SET_CHANNEL])
AC_TRY_COMPILE([#include <linux/nl80211.h>],
[enum nl80211_commands x = NL80211_CMD_SET_CHANNEL;],
[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_NL80211_CMD_SET_CHANNEL, 1, [SET_CHANNEL is supported])],
[AC_MSG_RESULT(no)])
AC_MSG_CHECKING([for NL80211_SPLIT_WIPHY_DUMP])
AC_TRY_COMPILE([#include <linux/nl80211.h>],
[enum nl80211_protocol_features x = NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP;],
[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_NL80211_SPLIT_WIPHY_DUMP, 1, [SPLIT_WIPHY_DUMP is supported])],
[AC_MSG_RESULT(no)])
AC_MSG_CHECKING([for NL80211_VHT_CAPABILITY])
AC_TRY_COMPILE([#include <linux/nl80211.h>],
[enum nl80211_attrs x = NL80211_ATTR_VHT_CAPABILITY;],
[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_NL80211_VHT_CAPABILITY, 1, [VHT_CAPABILITY is supported])],
[AC_MSG_RESULT(no)])
;;
*)
if test x$want_libnl != "xno" -a x$want_libnl != "xifavailable"; then
AC_MSG_WARN([libnl is Linux-specific, ignoring --with-libnl])
fi
esac
# libsmi
# FIXME: currently the path argument to with-libsmi is being ignored
AX_LIBSMI
#
# Check for programs used when building DocBook documentation.
#
AC_CHECK_PROGS(XSLTPROC, xsltproc, xsltproc)
AC_CHECK_PROGS(A2X, a2x, a2x)
AC_CHECK_PROGS(FOP, fop, fop)
# HTML to text processor
AC_MSG_CHECKING([for an HTML to text processor])
AS_IF([w3m -version >&AS_MESSAGE_LOG_FD 2>&1], [have_a2x_text=w3m],
[lynx -version >&AS_MESSAGE_LOG_FD 2>&1], [have_a2x_text=lynx],
[have_a2x_text=no])
AC_MSG_RESULT([$have_a2x_text])
AM_CONDITIONAL(HAVE_A2X_TEXT, [test "x$have_a2x_text" != xno])
AS_IF([test $have_a2x_text = lynx], [A2X_LYNX="--lynx"])
AC_SUBST(A2X_LYNX)
# Check for packaging utilities
# For now, we check to see if the various packaging utilites are in our
# path. I'm too lazy to write code to go hunt for them. - Gerald
#
# Source packages.
# (Lets you install the desktop files.)
#
AC_PATH_PROG(DESKTOP_FILE_INSTALL, desktop-file-install)
# SVR4/Solaris
AC_CHECK_PROG(HAVE_PKGPROTO, pkgproto, "yes", "no")
AC_CHECK_PROG(HAVE_PKGMK, pkgmk, "yes", "no")
AC_CHECK_PROG(HAVE_PKGTRANS, pkgtrans, "yes", "no")
if test x$HAVE_PKGPROTO = xyes -a x$HAVE_PKGMK = xyes \
-a x$HAVE_PKGTRANS = xyes ; then
HAVE_SVR4_PACKAGING=yes
else
HAVE_SVR4_PACKAGING=no
fi
AC_SUBST(HAVE_SVR4_PACKAGING)
# RPM
#
# Looks for the rpmbuild program, and checks to see if we can redefine "_topdir".
#
AC_CHECK_PROGS(RPMBUILD, [rpmbuild], [false])
if test "x$RPMBUILD" != "xfalse" ; then
AC_MSG_CHECKING([to see if we can redefine _topdir])
rpm --define '_topdir /tmp' > /dev/null 2>&1
if test $? -eq 0 ; then
AC_MSG_RESULT(yes)
have_rpm=yes
else
AC_MSG_RESULT([no, you'll have to build packages manually])
have_rpm=no
fi
fi
AM_CONDITIONAL(HAVE_RPM, [test "x$have_rpm" = xyes])
# Debian
AC_CHECK_PROG(HAVE_DPKG_BUILDPACKAGE, dpkg-buildpackage, "yes", "no")
# macOS
AC_CHECK_PROG(HAVE_XCODEBUILD, xcodebuild, "yes", "no")
AC_CHECK_PROG(HAVE_HDIUTIL, hdiutil, "yes", "no")
AC_CHECK_PROG(HAVE_BLESS, bless, "yes", "no")
if test x$HAVE_XCODEBUILD = xyes -a x$HAVE_HDIUTIL = xyes \
-a x$HAVE_BLESS = xyes ; then
HAVE_OSX_PACKAGING=yes
else
HAVE_OSX_PACKAGING=no
fi
AC_SUBST(HAVE_OSX_PACKAGING)
#
# Use this as a proxy for "is this macOS" (just in case somebody actually
# built and installed Darwin as an OS, perhaps with some X11-based GUI,
# don't look for Darwin).
#
AC_CHECK_PROG(have_sw_vers, sw_vers, "yes", "no")
AM_CONDITIONAL(NOT_OS_X, test "x$have_sw_vers" = "xno")
# Shellcheck
AC_CHECK_PROG(HAVE_SHELLCHECK, shellcheck, "yes", "no")
AM_CONDITIONAL(HAVE_SHELLCHECK, test x$HAVE_SHELLCHECK = xyes)
#
# Check compiler vendor. For GCC this will be 'gnu' and for Clang 'clang'.
#
AX_COMPILER_VENDOR
if test "x$CXX" != "x" ; then
AC_LANG_PUSH(C++)
AX_COMPILER_VENDOR
AC_LANG_POP
fi
#
# Some compilers have to be told to fail when passed an unknown -W flag;
# make sure we do that.
#
AC_WIRESHARK_CHECK_UNKNOWN_WARNING_OPTION_ERROR
#
# Some C++ compilers have to be told to fail when passed a -W flag that
# they don't think should apply to C++; make sure we do that.
#
AC_WIRESHARK_CHECK_NON_CXX_WARNING_OPTION_ERROR
#
# The following are for C and C++
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wall)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wextra)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wendif-labels)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wpointer-arith)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wformat-security)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fwrapv)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fno-strict-overflow)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fno-delete-null-pointer-checks)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wvla)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Waddress)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wattributes)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wdiv-by-zero)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wignored-qualifiers)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wpragmas)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wno-overlength-strings)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wno-long-long)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wheader-guard)
#
# The following are C only, not C++
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wc++-compat, C)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wunused-const-variable, C)
#
# XXX - OK for C++?
#
# Make sure -Wshadow doesn't complain about variables in function and
# function pointer declarations shadowing other variables; if not, don't
# turn it on, as some versions of GCC (including the one in at least
# some Xcode versions that came with Mac OS X 10.5) complain about
# that.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wshadow, C,
[
extern int bar(int a);
extern int foo(int);
int
foo(int a)
{
int (*fptr)(int a) = bar;
return fptr(a) * 2;
}
],
[warns about variables in function declarations shadowing other variables])
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wno-pointer-sign, C)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wold-style-definition, C)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wstrict-prototypes, C)
# Unfortunately some versions of gcc generate logical-op warnings when strchr()
# is given a constant string.
# gcc versions 4.3.2 and 4.4.5 are known to have the problem.
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wlogical-op, C,
[
#include <string.h>
int foo(const char *, int);
int bar(void);
int
foo(const char *sep, int c)
{
if (strchr (sep, c) != NULL)
return 1;
else
return 0;
}
int
bar(void)
{
return foo("<", 'a');
}
],
[generates warnings from strchr()])
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wjump-misses-init, C)
# The Qt headers generate a ton of shortening errors on 64-bit systems
# so only enable this for C for now.
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wshorten-64-to-32, C)
#
# 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.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Werror=implicit, C)
# Clang only. Avoid "argument unused during compilation" warnings
# (for example, when getting the -gsplit-dwarf option or
# when combining -fwrapv with -fno-strict-overflow)
if test x"$ax_cv_c_compiler_vendor" = xclang; then
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Qunused-arguments, C)
fi
if test x"$ax_cv_cxx_compiler_vendor" = xclang; then
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Qunused-arguments, CXX)
fi
#
# Use the faster pre gcc 4.5 floating point precision if available.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fexcess-precision=fast)
#
# 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.
#
# GCC and GCC-compatible compilers
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fvisibility=hidden)
if test "x$can_add_to_cflags" = "xno"
then
#
# Sun^WOracle C.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-xldscope=hidden)
if test "x$can_add_to_cflags" = "xno"
then
# TODO add other ways of hiding symbols
AC_MSG_WARN(Compiler will export all symbols from shared libraries)
fi
fi
#
# Try to add some additional checks to CFLAGS.
# These are not enabled by default, because the warnings they produce
# are very hard or impossible to eliminate.
#
AC_ARG_ENABLE(extra-compiler-warnings,
AC_HELP_STRING( [--enable-extra-compiler-warnings],
[do additional compiler warnings @<:@default=no@:>@]),
[
wireshark_extra_flags=$enableval
if test $enableval != no
then
#
# The following are for C and C++
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wpedantic)
#
# As we use variadic macros, we don't want warnings
# about them, even with -Wpedantic.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wno-variadic-macros)
#
# Various code blocks this one.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Woverflow)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-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.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wcast-qual)
#
# Some generated ASN.1 dissectors block this one;
# multiple function declarations for the same
# function are being generated.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wredundant-decls)
#
# Some loops are safe, but it's hard to convince the
# compiler of that.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wunsafe-loop-optimizations)
#
# All the registration functions block these for now.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wmissing-prototypes)
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wmissing-declarations)
#
# A bunch of "that might not work on SPARC" code blocks
# this one for now.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wcast-align)
#
# Works only with Clang
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wunreachable-code)
#
# Works only with Clang but generates a lot of warnings
# (about glib library not using Doxygen)
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wdocumentation)
#
# 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.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wbad-function-cast, C)
# Works only with GCC 7
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wduplicated-branches)
fi
])
# Try to add ASAN address analyze.
# Only needed for analyse
#
AC_ARG_ENABLE(asan,
AC_HELP_STRING( [--enable-asan],
[Enable AddressSanitizer (ASAN) for debugging (degrades performance)@<:@default=no@:>@]),
[
#
# With Clang >= 3.5 Leak detection is enable by default
# and no yet all leak is fixed...
# use ASAN_OPTIONS=detect_leaks=0 to disable detect_leaks
#
# XXX shouldn't this also be added to LDFLAGS?
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fsanitize=address)
# Disable ASAN for build-time tools, e.g. lemon
WS_CFLAGS_saved="$WS_CFLAGS"
WS_LDFLAGS_saved="$WS_LDFLAGS"
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fno-sanitize=all, C)
if test "x$can_add_to_cflags" = "xyes"
then
NO_SANITIZE_CFLAGS="-fno-sanitize=all"
NO_SANITIZE_LDFLAGS="-fno-sanitize=all"
fi
WS_CFLAGS="$WS_CFLAGS_saved"
WS_LDFLAGS="$WS_LDFLAGS_saved"
])
AC_SUBST(NO_SANITIZE_CFLAGS)
AC_SUBST(NO_SANITIZE_LDFLAGS)
# Add check hf conflict..
#
AC_ARG_ENABLE(checkhf-conflict,
AC_HELP_STRING( [--enable-checkhf-conflict],
[Enable hf conflict check for debugging (start-up may be slower)@<:@default=no@:>@]),
[
AC_DEFINE(ENABLE_CHECK_FILTER, 1, [Enable hf conflict check])
])
AC_WIRESHARK_LDFLAGS_CHECK([-Wl,--as-needed])
###AC_WIRESHARK_LDFLAGS_CHECK([-Wl,-M])
###AC_WIRESHARK_LDFLAGS_CHECK([-Wl,--cref])
# AC_WIRESHARK_LDFLAGS_CHECK([-flto])
# AC_WIRESHARK_LDFLAGS_CHECK([-fwhopr])
# AC_WIRESHARK_LDFLAGS_CHECK([-fwhole-program])
#
# Put -fPIE in PIE_CFLAGS and -pie in PIE_LDFLAGS if we can use them,
# so that we can build dumpcap PIE - it may run with elevated
# privileges, and using PIE means the OS can run it at random locations
# in the address space to make attacks more difficult.
#
WS_CFLAGS_saved="$WS_CFLAGS"
WS_LDFLAGS_saved="$WS_LDFLAGS"
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-fPIE, C)
if test "x$can_add_to_cflags" = "xyes"
then
AC_WIRESHARK_LDFLAGS_CHECK([-fPIE -pie])
if test "x$can_add_to_ldflags" = "xyes"
then
# We can use PIE
PIE_CFLAGS="-fPIE"
PIE_LDFLAGS="-pie"
fi
fi
WS_CFLAGS="$WS_CFLAGS_saved"
WS_LDFLAGS="$WS_LDFLAGS_saved"
AC_SUBST(PIE_CFLAGS)
AC_SUBST(PIE_LDFLAGS)
WS_CFLAGS_saved="$WS_CFLAGS"
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-msse4.2, C)
if test "x$can_add_to_cflags" = "xyes"
then
#
# The compiler supports -msse4.2; use that to enable SSE 4.2.
#
# We only want to apply -msse4.2 to
# wsutil/ws_mempbrk_sse42.c, as the SSE4.2 code there
# is run only if the hardware supports it, but other
# code would do no such checks.
#
ac_sse4_2_flag=-msse4.2
else
#
# Try -xarch=sse4_2; that's the flag for Sun's compiler.
#
AC_WIRESHARK_COMPILER_FLAGS_CHECK(-xarch=sse4_2, C)
if test "x$can_add_to_cflags" = "xyes"
then
#
# The compiler supports -xarch=sse4_2; use that to
# enable SSE 4.2.
ac_sse4_2_flag=-xarch=sse4_2
fi
fi
WS_CFLAGS="$WS_CFLAGS_saved"
if test "x$ac_sse4_2_flag" != x; then
#
# OK, we have a compiler flag to enable SSE 4.2.
#
# Make sure we have the necessary headers for the SSE4.2 intrinsics
# and that we can use them.
#
# First, check whether we have emmintrin.h and can use it
# *without* the SSE 4.2 flag.
#
AC_MSG_CHECKING([whether there is emmintrin.h header and we can use it])
AC_TRY_COMPILE(
[#include <emmintrin.h>],
[return 0;],
[
emmintrin_h_works=yes
AC_MSG_RESULT([yes])
],
[
emmintrin_h_works=no
AC_MSG_RESULT([no])
]
)
#
# OK, if that works, see whether we have nmmintrin.h and
# can use it *with* the SSE 4.2 flag.
#
if test "x$emmintrin_h_works" = "xyes"; then
#
# Add the SSE4.2 flags to the beginning of CFLAGS,
# in case the user explicitly specified -mno-sse4.2
# (or in case Gentoo's build tools did so); if they
# did so, we only want this to work if we can use
# the #pragma to override that for ws_mempbrk_sse42.c,
# and putting it at the beginning means that the
# CFLAGS setting in the environment will come later
# and override it.
#
AC_MSG_CHECKING([whether there is nmmintrin.h header and we can use it])
saved_CFLAGS="$CFLAGS"
CFLAGS="$ac_sse4_2_flag $WS_CFLAGS $CFLAGS"
AC_TRY_COMPILE(
[#include <nmmintrin.h>],
[return 0;],
[
have_sse42=yes
AC_DEFINE(HAVE_SSE4_2, 1, [Support SSSE4.2 (Streaming SIMD Extensions 4.2) instructions])
CFLAGS_SSE42="$ac_sse4_2_flag"
AC_MSG_RESULT([yes])
],
[
have_sse42=no
AC_MSG_RESULT([no])
]
)
CFLAGS="$saved_CFLAGS"
else
have_sse42=no
fi
else
have_sse42=no
fi
dnl build libwsutil_sse42 only if there is SSE4.2
AM_CONDITIONAL(SSE42_SUPPORTED, test "x$have_sse42" = "xyes")
AC_SUBST(CFLAGS_SSE42)
#
# If we're running GCC or clang define _U_ to be "__attribute__((unused))"
# so we can use _U_ to flag unused function parameters and not get warnings
# about them. Otherwise, define _U_ to be an empty string so that _U_ used
# to flag an unused function parameters will compile with other compilers.
#
# XXX - similar hints for other compilers?
#
if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then
AC_DEFINE(_U_, __attribute__((unused)), [Hint to the compiler that a function parameters is not used])
AC_DEFINE(WS_NORETURN, __attribute((noreturn)), [Hint to the compiler that a function never returns])
else
AC_DEFINE(_U_, , [Hint to the compiler that a function parameters is not used])
AC_DEFINE(WS_NORETURN, , [Hint to the compiler that a function never returns])
fi
# If we're running GCC or CLang, use FORTIFY_SOURCE=2
# (only if the GCC 'optimization level' > 0).
#
# See: http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
# See: http://sourceware.org/bugzilla/show_bug.cgi?id=13979
#
# Note: FORTIFY_SOURCE is only effective for gcc optimization level > 0 (-O1, etc)
AC_WIRESHARK_GCC_FORTIFY_SOURCE_CHECK
#
# If the compiler supports GCC-style flags, enable a barrier "stop on
# warning".
# This barrier is set for a very large part of the code. However, it is
# typically not set for "generated" code (flex, ans2wrs, idl2wrs, ...)
#
warnings_as_errors_default="yes"
AC_MSG_CHECKING(whether we should treat compiler warnings as errors)
AC_ARG_ENABLE(warnings-as-errors,
AC_HELP_STRING( [--enable-warnings-as-errors],
[treat warnings as errors (only for GCC or clang) @<:@default=yes, unless extra compiler warnings are enabled@:>@]),
[
if test "x$ac_supports_gcc_flags" = "xyes" -a "x$enableval" = "xyes"; then
with_warnings_as_errors="yes"
AC_MSG_RESULT(yes)
else
with_warnings_as_errors="no"
AC_MSG_RESULT(no)
fi
],
[
if test "x$ac_supports_gcc_flags" = "xyes" -a "x$wireshark_extra_flags" = "x" -a "x$warnings_as_errors_default" = "xyes"; then
with_warnings_as_errors="yes"
AC_MSG_RESULT(yes)
else
with_warnings_as_errors="no"
AC_MSG_RESULT(no)
fi
])
AS_IF([test "x$with_warnings_as_errors" = "xyes"], [WERROR="-Werror"], [WERROR=""])
AC_SUBST(WERROR)
AM_CONDITIONAL(HAVE_WARNINGS_AS_ERRORS, [test "x$with_warnings_as_errors" = "xyes"])
#
# Add any platform-specific compiler flags needed.
#
AC_MSG_CHECKING(for platform-specific compiler flags)
if test "x$GCC" = "xyes" ; then
#
# GCC - do any platform-specific tweaking necessary.
#
case "$host_os" in
solaris*)
# the X11 headers don't automatically include prototype info
# and a lot don't include the return type
WS_CPPFLAGS="$WS_CPPFLAGS -DFUNCPROTO=15"
WS_CFLAGS="$WS_CFLAGS -Wno-return-type"
WS_CXXFLAGS="$WS_CXXFLAGS -Wno-return-type"
AC_MSG_RESULT(GCC on Solaris - added -Wno-return-type -DFUNCPROTO=15)
;;