dnl Copyright (c) 1995, 1996, 1997, 1998 dnl The Regents of the University of California. All rights reserved. dnl dnl Redistribution and use in source and binary forms, with or without dnl modification, are permitted provided that: (1) source code distributions dnl retain the above copyright notice and this paragraph in its entirety, (2) dnl distributions including binary code include the above copyright notice and dnl this paragraph in its entirety in the documentation or other materials dnl provided with the distribution, and (3) all advertising materials mentioning dnl features or use of this software display the following acknowledgement: dnl ``This product includes software developed by the University of California, dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of dnl the University nor the names of its contributors may be used to endorse dnl or promote products derived from this software without specific prior dnl written permission. dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. dnl dnl LBL autoconf macros dnl dnl dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC. dnl dnl It appears that newer versions of autoconf (2.64 and later) will, dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the dnl beginning of the macro, even if the macro itself calls AC_PROG_CC. dnl See the "Prerequisite Macros" and "Expanded Before Required" sections dnl in the Autoconf documentation. dnl dnl This causes a steaming heap of fail in our case, as we were, in dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC, dnl calling AC_PROG_CC, and then doing the tests we now do in dnl AC_LBL_C_INIT. Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC, dnl and AC_LBL_C_INIT at the top level. dnl AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC, [ AC_BEFORE([$0], [AC_LBL_C_INIT]) AC_BEFORE([$0], [AC_PROG_CC]) AC_BEFORE([$0], [AC_LBL_DEVEL]) AC_ARG_WITH(gcc, [ --without-gcc don't use gcc]) $1="" if test "${srcdir}" != "." ; then $1="-I\$(srcdir)" fi if test "${CFLAGS+set}" = set; then LBL_CFLAGS="$CFLAGS" fi if test -z "$CC" -a "$with_gcc" = no ; then CC=cc export CC fi ]) dnl dnl Determine which compiler we're using (cc or gcc) dnl If using gcc, determine the version number dnl If using cc: dnl require that it support ansi prototypes dnl use -O (AC_PROG_CC will use -g -O2 on gcc, so we don't need to dnl do that ourselves for gcc) dnl add -g flags, as appropriate dnl explicitly specify /usr/local/include dnl dnl NOTE WELL: with newer versions of autoconf, "gcc" means any compiler dnl that defines __GNUC__, which means clang, for example, counts as "gcc". dnl dnl usage: dnl dnl AC_LBL_C_INIT(copt, incls) dnl dnl results: dnl dnl $1 (copt set) dnl $2 (incls set) dnl CC dnl LDFLAGS dnl LBL_CFLAGS dnl AC_DEFUN(AC_LBL_C_INIT, [ AC_BEFORE([$0], [AC_LBL_DEVEL]) AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT]) if test "$GCC" = yes ; then # # -Werror forces warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden) else $2="$$2 -I/usr/local/include" LDFLAGS="$LDFLAGS -L/usr/local/lib" case "$host_os" in darwin*) # # This is assumed either to be GCC or clang, both # of which use -Werror to force warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden) ;; hpux*) # # HP C, which is what we presume we're using, doesn't # exit with a non-zero exit status if we hand it an # invalid -W flag, can't be forced to do so even with # +We, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes ;; irix*) # # MIPS C, which is what we presume we're using, doesn't # necessarily exit with a non-zero exit status if we # hand it an invalid -W flag, can't be forced to do # so, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes # # It also, apparently, defaults to "char" being # unsigned, unlike most other C implementations; # I suppose we could say "signed char" whenever # we want to guarantee a signed "char", but let's # just force signed chars. # # -xansi is normally the default, but the # configure script was setting it; perhaps -cckr # was the default in the Old Days. (Then again, # that would probably be for backwards compatibility # in the days when ANSI C was Shiny and New, i.e. # 1989 and the early '90's, so maybe we can just # drop support for those compilers.) # # -g is equivalent to -g2, which turns off # optimization; we choose -g3, which generates # debugging information but doesn't turn off # optimization (even if the optimization would # cause inaccuracies in debugging). # $1="$$1 -xansi -signed -g3" ;; osf*) # # Presumed to be DEC OSF/1, Digital UNIX, or # Tru64 UNIX. # # The DEC C compiler, which is what we presume we're # using, doesn't exit with a non-zero exit status if we # hand it an invalid -W flag, can't be forced to do # so, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes # # -g is equivalent to -g2, which turns off # optimization; we choose -g3, which generates # debugging information but doesn't turn off # optimization (even if the optimization would # cause inaccuracies in debugging). # $1="$$1 -g3" ;; solaris*) # # Assumed to be Sun C, which requires -errwarn to force # warnings to be treated as errors. # ac_lbl_cc_force_warning_errors=-errwarn # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -xldscope=hidden) ;; esac $1="$$1 -O" fi ]) dnl dnl Save the values of various variables that affect compilation and dnl linking, and that we don't ourselves modify persistently; done dnl before a test involving compiling or linking is done, so that we dnl can restore those variables after the test is done. dnl AC_DEFUN(AC_LBL_SAVE_CHECK_STATE, [ save_CFLAGS="$CFLAGS" save_LIBS="$LIBS" save_LDFLAGS="$LDFLAGS" ]) dnl dnl Restore the values of variables saved by AC_LBL_SAVE_CHECK_STATE. dnl AC_DEFUN(AC_LBL_RESTORE_CHECK_STATE, [ CFLAGS="$save_CFLAGS" LIBS="$save_LIBS" LDFLAGS="$save_LDFLAGS" ]) dnl dnl Check whether the compiler option specified as the second argument dnl is supported by the compiler and, if so, add it to the macro dnl specified as the first argument dnl dnl If a third argument is supplied, treat it as C code to be compiled dnl with the flag in question, and the "treat warnings as errors" flag dnl set, and don't add the flag to the first argument if the compile dnl fails; this is for warning options cause problems that can't be dnl worked around. If a third argument is supplied, a fourth argument dnl should also be supplied; it's a message describing what the test dnl program is checking. dnl AC_DEFUN(AC_LBL_CHECK_COMPILER_OPT, [ AC_MSG_CHECKING([whether the compiler supports the $2 option]) save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $2" # # XXX - yes, this depends on the way AC_LANG_WERROR works, # but no mechanism is provided to turn AC_LANG_WERROR on # *and then turn it back off*, so that we *only* do it when # testing compiler options - 15 years after somebody asked # for it: # # https://autoconf.gnu.narkive.com/gTAVmfKD/how-to-cancel-flags-set-by-ac-lang-werror # save_ac_c_werror_flag="$ac_c_werror_flag" ac_c_werror_flag=yes # # We use AC_LANG_SOURCE() so that we can control the complete # content of the program being compiled. We do not, for example, # want the default "int main()" that AC_LANG_PROGRAM() generates, # as it will generate a warning with -Wold-style-definition, meaning # that we would treat it as not working, as the test will fail if # *any* error output, including a warning due to the flag we're # testing, is generated; see # # https://www.postgresql.org/message-id/2192993.1591682589%40sss.pgh.pa.us # https://www.postgresql.org/message-id/2192993.1591682589%40sss.pgh.pa.us # # This may, as per those two messages, be fixed in autoconf 2.70, # but we only require 2.69 or newer for now. # AC_COMPILE_IFELSE( [AC_LANG_SOURCE([[int main(void) { return 0; }]])], [ AC_MSG_RESULT([yes]) can_add_to_cflags=yes # # The compile supports this; do we have some C code for # which the warning should *not* appear? # We test the fourth argument because the third argument # could contain quotes, breaking the test. # if test "x$4" != "x" then CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors" AC_MSG_CHECKING(whether $2 $4) AC_COMPILE_IFELSE( [AC_LANG_SOURCE($3)], [ # # Not a problem. # AC_MSG_RESULT(no) ], [ # # A problem. # AC_MSG_RESULT(yes) can_add_to_cflags=no ]) fi CFLAGS="$save_CFLAGS" if test x"$can_add_to_cflags" = "xyes" then $1="$$1 $2" fi ], [ AC_MSG_RESULT([no]) CFLAGS="$save_CFLAGS" ]) ac_c_werror_flag="$save_ac_c_werror_flag" ]) dnl dnl Check whether the compiler supports an option to generate dnl Makefile-style dependency lines dnl dnl GCC uses -M for this. Non-GCC compilers that support this dnl use a variety of flags, including but not limited to -M. dnl dnl We test whether the flag in question is supported, as older dnl versions of compilers might not support it. dnl dnl We don't try all the possible flags, just in case some flag means dnl "generate dependencies" on one compiler but means something else dnl on another compiler. dnl dnl Most compilers that support this send the output to the standard dnl output by default. IBM's XLC, however, supports -M but sends dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout dnl to work around that, so we don't bother with XLC. dnl AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT, [ AC_MSG_CHECKING([whether the compiler supports generating dependencies]) if test "$GCC" = yes ; then # # GCC, or a compiler deemed to be GCC by AC_PROG_CC (even # though it's not); we assume that, in this case, the flag # would be -M. # ac_lbl_dependency_flag="-M" else # # Not GCC or a compiler deemed to be GCC; what platform is # this? (We're assuming that if the compiler isn't GCC # it's the compiler from the vendor of the OS; that won't # necessarily be true for x86 platforms, where it might be # the Intel C compiler.) # case "$host_os" in irix*|osf*|darwin*) # # MIPS C for IRIX, DEC C, and clang all use -M. # ac_lbl_dependency_flag="-M" ;; solaris*) # # Sun C uses -xM. # ac_lbl_dependency_flag="-xM" ;; hpux*) # # HP's older C compilers don't support this. # HP's newer C compilers support this with # either +M or +Make; the older compilers # interpret +M as something completely # different, so we use +Make so we don't # think it works with the older compilers. # ac_lbl_dependency_flag="+Make" ;; *) # # Not one of the above; assume no support for # generating dependencies. # ac_lbl_dependency_flag="" ;; esac fi # # Is ac_lbl_dependency_flag defined and, if so, does the compiler # complain about it? # # Note: clang doesn't seem to exit with an error status when handed # an unknown non-warning error, even if you pass it # -Werror=unknown-warning-option. However, it always supports # -M, so the fact that this test always succeeds with clang # isn't an issue. # if test ! -z "$ac_lbl_dependency_flag"; then AC_LANG_CONFTEST( [AC_LANG_SOURCE([[int main(void) { return 0; }]])]) if AC_RUN_LOG([eval "$CC $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1"]); then AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag]) DEPENDENCY_CFLAG="$ac_lbl_dependency_flag" MKDEP='${top_srcdir}/mkdep' else AC_MSG_RESULT([no]) # # We can't run mkdep, so have "make depend" do # nothing. # MKDEP='${top_srcdir}/nomkdep' fi rm -rf conftest* else AC_MSG_RESULT([no]) # # We can't run mkdep, so have "make depend" do # nothing. # MKDEP='${top_srcdir}/nomkdep' fi AC_SUBST(DEPENDENCY_CFLAG) AC_SUBST(MKDEP) ]) dnl dnl Determine what options are needed to build a shared library dnl dnl usage: dnl dnl AC_LBL_SHLIBS_INIT dnl dnl results: dnl dnl V_SHLIB_CCOPT (modified to build position-independent code) dnl V_SHLIB_CMD dnl V_SHLIB_OPT dnl V_SONAME_OPT dnl AC_DEFUN(AC_LBL_SHLIBS_INIT, [AC_PREREQ(2.50) if test "$GCC" = yes ; then # # On platforms where we build a shared library: # # add options to generate position-independent code, # if necessary (it's the default in AIX and Darwin/macOS); # # define option to set the soname of the shared library, # if the OS supports that; # # add options to specify, at link time, a directory to # add to the run-time search path, if that's necessary. # V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" case "$host_os" in aix*) ;; freebsd*|netbsd*|openbsd*|dragonfly*|linux*|osf*|haiku*|midipix*|gnu*) # # Platforms where the C compiler is GCC or accepts # compatible command-line arguments, and the linker # is the GNU linker or accepts compatible command-line # arguments. # # Some instruction sets require -fPIC on some # operating systems. Check for them. If you # have a combination that requires it, add it # here. # PIC_OPT=-fpic case "$host_cpu" in sparc64*) case "$host_os" in freebsd*|openbsd*|linux*) PIC_OPT=-fPIC ;; esac ;; esac V_SHLIB_CCOPT="$V_SHLIB_CCOPT $PIC_OPT" V_SONAME_OPT="-Wl,-soname," ;; hpux*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" # # XXX - this assumes GCC is using the HP linker, # rather than the GNU linker, and that the "+h" # option is used on all HP-UX platforms, both .sl # and .so. # V_SONAME_OPT="-Wl,+h," # # By default, directories specified with -L # are added to the run-time search path, so # we don't add them in pcap-config. # ;; solaris*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" # # Sun/Oracle's C compiler, GCC, and GCC-compatible # compilers support -Wl,{comma-separated list of options}, # and we use the C compiler, not ld, for all linking, # including linking to produce a shared library. # V_SONAME_OPT="-Wl,-h," ;; esac else # # Set the appropriate compiler flags and, on platforms # where we build a shared library: # # add options to generate position-independent code, # if necessary (it's the default in Darwin/macOS); # # if we generate ".so" shared libraries, define the # appropriate options for building the shared library; # # add options to specify, at link time, a directory to # add to the run-time search path, if that's necessary. # # Note: spaces after V_SONAME_OPT are significant; on # some platforms the soname is passed with a GCC-like # "-Wl,-soname,{soname}" option, with the soname part # of the option, while on other platforms the C compiler # driver takes it as a regular option with the soname # following the option. # case "$host_os" in aix*) V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-G -bnoentry -bexpall" ;; freebsd*|netbsd*|openbsd*|dragonfly*|linux*) # # Platforms where the C compiler is GCC or accepts # compatible command-line arguments, and the linker # is the GNU linker or accepts compatible command-line # arguments. # # XXX - does 64-bit SPARC require -fPIC? # V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" V_SONAME_OPT="-Wl,-soname," ;; hpux*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT +z" V_SHLIB_CMD="\$(LD)" V_SHLIB_OPT="-b" V_SONAME_OPT="+h " # # By default, directories specified with -L # are added to the run-time search path, so # we don't add them in pcap-config. # ;; osf*) # # Presumed to be DEC OSF/1, Digital UNIX, or # Tru64 UNIX. # V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" V_SONAME_OPT="-soname " ;; solaris*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -Kpic" V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-G" # # Sun/Oracle's C compiler, GCC, and GCC-compatible # compilers support -Wl,{comma-separated list of options}, # and we use the C compiler, not ld, for all linking, # including linking to produce a shared library. # V_SONAME_OPT="-Wl,-h," ;; esac fi ]) # # Test whether we have __atomic_load_n() and __atomic_store_n(). # # We use AC_LINK_IFELSE because AC_TRY_COMPILE will succeed, as the # compiler will just think that those functions are undefined, # and perhaps warn about that, but not fail to compile. # AC_DEFUN(AC_PCAP_C___ATOMICS, [ AC_MSG_CHECKING(for __atomic_load_n) AC_CACHE_VAL(ac_cv_have___atomic_load_n, AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ int i = 17; int j; j = __atomic_load_n(&i, __ATOMIC_RELAXED); ]])], [ac_have___atomic_load_n=yes], [ac_have___atomic_load_n=no])) AC_MSG_RESULT($ac_have___atomic_load_n) if test $ac_have___atomic_load_n = yes ; then AC_DEFINE(HAVE___ATOMIC_LOAD_N, 1, [define if __atomic_load_n is supported by the compiler]) fi AC_MSG_CHECKING(for __atomic_store_n) AC_CACHE_VAL(ac_cv_have___atomic_store_n, AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ int i; __atomic_store_n(&i, 17, __ATOMIC_RELAXED); ]])], [ac_have___atomic_store_n=yes], [ac_have___atomic_store_n=no])) AC_MSG_RESULT($ac_have___atomic_store_n) if test $ac_have___atomic_store_n = yes ; then AC_DEFINE(HAVE___ATOMIC_STORE_N, 1, [define if __atomic_store_n is supported by the compiler]) fi]) dnl dnl If the file .devel exists: dnl Add some warning flags if the compiler supports them dnl If an os prototype include exists, symlink os-proto.h to it dnl dnl usage: dnl dnl AC_LBL_DEVEL(copt) dnl dnl results: dnl dnl $1 (copt appended) dnl HAVE_OS_PROTO_H (defined) dnl os-proto.h (symlinked) dnl AC_DEFUN(AC_LBL_DEVEL, [rm -f os-proto.h if test "${LBL_CFLAGS+set}" = set; then $1="$$1 ${LBL_CFLAGS}" fi if test -f .devel ; then # # Skip all the warning option stuff on some compilers. # if test "$ac_lbl_cc_dont_try_gcc_dashW" != yes; then AC_LBL_CHECK_COMPILER_OPT($1, -W) AC_LBL_CHECK_COMPILER_OPT($1, -Wall) AC_LBL_CHECK_COMPILER_OPT($1, -Wcomma) AC_LBL_CHECK_COMPILER_OPT($1, -Wdocumentation) AC_LBL_CHECK_COMPILER_OPT($1, -Wformat-nonliteral) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-noreturn) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-prototypes) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-variable-declarations) AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-arith) AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-sign) AC_LBL_CHECK_COMPILER_OPT($1, -Wshadow) AC_LBL_CHECK_COMPILER_OPT($1, -Wsign-compare) AC_LBL_CHECK_COMPILER_OPT($1, -Wstrict-prototypes) AC_LBL_CHECK_COMPILER_OPT($1, -Wunused-parameter) AC_LBL_CHECK_COMPILER_OPT($1, -Wused-but-marked-unused) # Warns about safeguards added in case the enums are # extended # AC_LBL_CHECK_COMPILER_OPT($1, -Wcovered-switch-default) # # This can cause problems with ntohs(), ntohl(), # htons(), and htonl() on some platforms, such # as OpenBSD 6.3 with Clang 5.0.1. I guess the # problem is that the macro that ultimately does # the byte-swapping involves a conditional # expression that tests whether the value being # swapped is a compile-time constant or not, # using __builtin_constant_p(), and, depending # on whether it is, does a compile-time swap or # a run-time swap; perhaps the compiler always # considers one of the two results of the # conditional expressin is never evaluated, # because the conditional check is done at # compile time, and thus always says "that # expression is never executed". # # (Perhaps there should be a way of flagging # an expression that you *want* evaluated at # compile time, so that the compiler 1) warns # if it *can't* be evaluated at compile time # and 2) *doesn't* warn that the true or false # branch will never be reached.) # AC_LBL_CHECK_COMPILER_OPT($1, -Wunreachable-code, [ #include unsigned short testme(unsigned short a) { return ntohs(a); } ], [generates warnings from ntohs()]) AC_LBL_CHECK_COMPILER_OPT($1, -Wshorten-64-to-32) fi AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT() # # We used to set -n32 for IRIX 6 when not using GCC (presumed # to mean that we're using MIPS C or MIPSpro C); it specified # the "new" faster 32-bit ABI, introduced in IRIX 6.2. I'm # not sure why that would be something to do *only* with a # .devel file; why should the ABI for which we produce code # depend on .devel? # AC_MSG_CHECKING([whether to use an os-proto.h header]) os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'` name="lbl/os-$os.h" if test -f $name ; then AC_MSG_RESULT([yes, at "$name"]) ln -s $name os-proto.h AC_DEFINE(HAVE_OS_PROTO_H, 1, [if there's an os-proto.h for this platform, to use additional prototypes]) else AC_MSG_RESULT([no]) fi fi]) dnl dnl AC_LBL_LIBRARY_NET dnl dnl Look for various networking-related libraries that we may need. dnl dnl We need getaddrinfo() to translate host names in filters to IP dnl addresses. We use getaddrinfo() because we want a portable dnl thread-safe way of getting information for a host name or port; dnl there exist _r versions of gethostbyname() and getservbyname() on dnl some platforms, but not on all platforms. dnl dnl We may also need socket() and other socket functions to support: dnl dnl Local packet capture with capture mechanisms that use sockets. dnl dnl Local capture device enumeration if a socket call is needed to dnl enumerate devices or get device attributes. dnl dnl Packet capture from services that put captured packets on the dnl network, such as rpcap servers. dnl dnl We may also need getnameinfo() for packet capture from services dnl that put packets on the networik. dnl AC_DEFUN(AC_LBL_LIBRARY_NET, [ # # Most operating systems have getaddrinfo(), and the other routines # we may need, in the default searched libraries (e.g., libc). # Check there first. # AC_CHECK_FUNC(getaddrinfo,, [ # # Not found in the standard system libraries. # # In some versions of Solaris, we need to link with libsocket # and libnsl, so check in libsocket and also link with liblnsl # when doing this test. # # Linking with libsocket and libnsl will find all the routines # we need. # AC_CHECK_LIB(socket, getaddrinfo, [ # # OK, we found it in libsocket. # LIBS="-lsocket -lnsl $LIBS" ], [ # # Not found in libsocket; test for it in libnetwork, which # is where it is in Haiku. # # Linking with libnetwork will find all the routines we # need. # AC_CHECK_LIB(network, getaddrinfo, [ # # OK, we found it in libnetwork. # LIBS="-lnetwork $LIBS" ], [ # # We didn't find it. # AC_MSG_ERROR([getaddrinfo is required, but wasn't found]) ]) ], -lnsl) # # We require a version of recvmsg() that conforms to the Single # UNIX Specification, so that we can check whether a datagram # received with recvmsg() was truncated when received due to the # buffer being too small. # # On most systems, the version of recvmsg() in the libraries # found above conforms to the SUS. # # On at least some versions of Solaris, it does not conform to # the SUS, and we need the version in libxnet, which does # conform. # # Check whether libxnet exists and has a version of recvmsg(); # if it does, link with libxnet before we link with libsocket, # to get that version. # # This test also links with libsocket and libnsl. # AC_CHECK_LIB(xnet, recvmsg, [ # # libxnet has recvmsg(); link with it as well. # LIBS="-lxnet $LIBS" ], , -lsocket -lnsl) ]) # # DLPI needs putmsg under HP-UX, so test for -lstr while we're at it. # AC_SEARCH_LIBS(putmsg, str) ]) m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) dnl pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- dnl serial 11 (pkg-config-0.29) dnl dnl Copyright © 2004 Scott James Remnant . dnl Copyright © 2012-2015 Dan Nicholson dnl dnl This program is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 2 of the License, or dnl (at your option) any later version. dnl dnl This program is distributed in the hope that it will be useful, but dnl WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU dnl General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program; if not, write to the Free Software dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA dnl 02111-1307, USA. dnl dnl As a special exception to the GNU General Public License, if you dnl distribute this file as part of a program that contains a dnl configuration script generated by Autoconf, you may include it under dnl the same distribution terms that you use for the rest of that dnl program. dnl PKG_PREREQ(MIN-VERSION) dnl ----------------------- dnl Since: 0.29 dnl dnl Verify that the version of the pkg-config macros are at least dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's dnl installed version of pkg-config, this checks the developer's version dnl of pkg.m4 when generating configure. dnl dnl To ensure that this macro is defined, also add: dnl m4_ifndef([PKG_PREREQ], dnl [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])]) dnl dnl See the "Since" comment for each macro you use to see what version dnl of the macros you require. m4_defun([PKG_PREREQ], [m4_define([PKG_MACROS_VERSION], [0.29]) m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1, [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])]) ])dnl PKG_PREREQ dnl PKG_PROG_PKG_CONFIG([MIN-VERSION]) dnl ---------------------------------- dnl Since: 0.16 dnl dnl Search for the pkg-config tool and set the PKG_CONFIG variable to dnl first found in the path. Checks that the version of pkg-config found dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.17.0 is dnl used since that's the first version where --static was supported. AC_DEFUN([PKG_PROG_PKG_CONFIG], [m4_pattern_forbid([^_?PKG_[A-Z_]+$]) m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$]) m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$]) AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility]) AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path]) AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path]) if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) fi if test -n "$PKG_CONFIG"; then _pkg_min_version=m4_default([$1], [0.17.0]) AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) PKG_CONFIG="" fi fi[]dnl ])dnl PKG_PROG_PKG_CONFIG dnl PKG_CHECK_EXISTS(MODULE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ------------------------------------------------------------------- dnl Since: 0.18 dnl dnl Check to see whether a particular module exists. Similar to dnl PKG_CHECK_MODULE(), but does not set variables or print errors. AC_DEFUN([PKG_CHECK_EXISTS], [ if test -n "$PKG_CONFIG" && \ AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then m4_default([$2], [:]) m4_ifvaln([$3], [else $3])dnl fi]) dnl _PKG_CONFIG_WITH_FLAGS([VARIABLE], [FLAGS], [MODULE]) dnl --------------------------------------------- dnl Internal wrapper calling pkg-config via PKG_CONFIG and, if dnl pkg-config fails, reporting the error and quitting. m4_define([_PKG_CONFIG_WITH_FLAGS], [if test ! -n "$$1"; then $1=`$PKG_CONFIG $2 "$3" 2>/dev/null` if test "x$?" != "x0"; then # # That failed - report an error. # Re-run the command, telling pkg-config to print an error # message, capture the error message, and report it. # This causes the configuration script to fail, as it means # the script is almost certainly doing something wrong. # _PKG_SHORT_ERRORS_SUPPORTED if test $_pkg_short_errors_supported = yes; then _pkg_error_string=`$PKG_CONFIG --short-errors --print-errors $2 "$3" 2>&1` else _pkg_error_string=`$PKG_CONFIG --print-errors $2 "$3" 2>&1` fi AC_MSG_ERROR([$PKG_CONFIG $2 "$3" failed: $_pkg_error_string]) fi fi[]dnl ])dnl _PKG_CONFIG_WITH_FLAGS dnl _PKG_CONFIG([VARIABLE], [FLAGS], [MODULE]) dnl --------------------------------------------- dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting dnl pkg_failed based on the result. m4_define([_PKG_CONFIG], [if test -n "$$1"; then pkg_cv_[]$1="$$1" elif test -n "$PKG_CONFIG"; then PKG_CHECK_EXISTS([$3], [pkg_cv_[]$1=`$PKG_CONFIG $2 "$3" 2>/dev/null` test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes]) else pkg_failed=untried fi[]dnl ])dnl _PKG_CONFIG dnl _PKG_SHORT_ERRORS_SUPPORTED dnl --------------------------- dnl Internal check to see if pkg-config supports short errors. AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], [ if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then _pkg_short_errors_supported=yes else _pkg_short_errors_supported=no fi[]dnl ])dnl _PKG_SHORT_ERRORS_SUPPORTED dnl PKG_CHECK_MODULE(VARIABLE-PREFIX, MODULE, [ACTION-IF-FOUND], dnl [ACTION-IF-NOT-FOUND]) dnl -------------------------------------------------------------- dnl Since: 0.4.0 AC_DEFUN([PKG_CHECK_MODULE], [ AC_MSG_CHECKING([for $2 with pkg-config]) if test -n "$PKG_CONFIG"; then AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $2, overriding pkg-config])dnl AC_ARG_VAR([$1][_LIBS], [linker flags for $2, overriding pkg-config])dnl AC_ARG_VAR([$1][_LIBS_STATIC], [static-link linker flags for $2, overriding pkg-config])dnl if AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$2"]); then # # The package was found, so try to get its C flags and # libraries. # AC_MSG_RESULT([found]) _PKG_CONFIG_WITH_FLAGS([$1][_CFLAGS], [--cflags], [$2]) _PKG_CONFIG_WITH_FLAGS([$1][_LIBS], [--libs], [$2]) _PKG_CONFIG_WITH_FLAGS([$1][_LIBS_STATIC], [--libs --static], [$2]) m4_default([$3], [:]) else AC_MSG_RESULT([not found]) m4_default([$4], [:]) fi else # No pkg-config, so obviously not found with pkg-config. AC_MSG_RESULT([pkg-config not found]) m4_default([$4], [:]) fi ])dnl PKG_CHECK_MODULE dnl PKG_CHECK_MODULE_STATIC(VARIABLE-PREFIX, MODULE, [ACTION-IF-FOUND], dnl [ACTION-IF-NOT-FOUND]) dnl --------------------------------------------------------------------- dnl Since: 0.29 dnl dnl Checks for existence of MODULE and gathers its build flags with dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags dnl and VARIABLE-PREFIX_LIBS from --libs. AC_DEFUN([PKG_CHECK_MODULE_STATIC], [ _save_PKG_CONFIG=$PKG_CONFIG PKG_CONFIG="$PKG_CONFIG --static" PKG_CHECK_MODULE($@) PKG_CONFIG=$_save_PKG_CONFIG[]dnl ])dnl PKG_CHECK_MODULE_STATIC dnl PKG_INSTALLDIR([DIRECTORY]) dnl ------------------------- dnl Since: 0.27 dnl dnl Substitutes the variable pkgconfigdir as the location where a module dnl should install pkg-config .pc files. By default the directory is dnl $libdir/pkgconfig, but the default can be changed by passing dnl DIRECTORY. The user can override through the --with-pkgconfigdir dnl parameter. AC_DEFUN([PKG_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])]) m4_pushdef([pkg_description], [pkg-config installation directory @<:@]pkg_default[@:>@]) AC_ARG_WITH([pkgconfigdir], [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],, [with_pkgconfigdir=]pkg_default) AC_SUBST([pkgconfigdir], [$with_pkgconfigdir]) m4_popdef([pkg_default]) m4_popdef([pkg_description]) ])dnl PKG_INSTALLDIR dnl PKG_NOARCH_INSTALLDIR([DIRECTORY]) dnl -------------------------------- dnl Since: 0.27 dnl dnl Substitutes the variable noarch_pkgconfigdir as the location where a dnl module should install arch-independent pkg-config .pc files. By dnl default the directory is $datadir/pkgconfig, but the default can be dnl changed by passing DIRECTORY. The user can override through the dnl --with-noarch-pkgconfigdir parameter. AC_DEFUN([PKG_NOARCH_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])]) m4_pushdef([pkg_description], [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@]) AC_ARG_WITH([noarch-pkgconfigdir], [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],, [with_noarch_pkgconfigdir=]pkg_default) AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir]) m4_popdef([pkg_default]) m4_popdef([pkg_description]) ])dnl PKG_NOARCH_INSTALLDIR dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE, dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ------------------------------------------- dnl Since: 0.28 dnl dnl Retrieves the value of the pkg-config variable for the given module. AC_DEFUN([PKG_CHECK_VAR], [ AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl _PKG_CONFIG([$1], [--variable="][$3]["], [$2]) AS_VAR_COPY([$1], [pkg_cv_][$1]) AS_VAR_IF([$1], [""], [$5], [$4])dnl ])dnl PKG_CHECK_VAR