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 "$CC" ; then case "$host_os" in bsdi*) AC_CHECK_PROG(SHLICC2, shlicc2, yes, no) if test $SHLICC2 = yes ; then CC=shlicc2 export CC fi ;; esac fi if test -z "$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([$0], [AC_LBL_DEVEL]) if test "$GCC" = yes ; then # # -Werror forces warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror else $2="$$2 -I/usr/local/include" LDFLAGS="$LDFLAGS -L/usr/local/lib" case "$host_os" in darwin*) # # This is assumed either to be GCC or clang, both # of which use -Werror to force warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror ;; hpux*) # # HP C, which is what we presume we're using, doesn't # exit with a non-zero exit status if we hand it an # invalid -W flag, can't be forced to do so even with # +We, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes ;; irix*) # # MIPS C, which is what we presume we're using, doesn't # necessarily exit with a non-zero exit status if we # hand it an invalid -W flag, can't be forced to do # so, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes # # It also, apparently, defaults to "char" being # unsigned, unlike most other C implementations; # I suppose we could say "signed char" whenever # we want to guarantee a signed "char", but let's # just force signed chars. # # -xansi is normally the default, but the # configure script was setting it; perhaps -cckr # was the default in the Old Days. (Then again, # that would probably be for backwards compatibility # in the days when ANSI C was Shiny and New, i.e. # 1989 and the early '90's, so maybe we can just # drop support for those compilers.) # # -g is equivalent to -g2, which turns off # optimization; we choose -g3, which generates # debugging information but doesn't turn off # optimization (even if the optimization would # cause inaccuracies in debugging). # $1="$$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="$$1 -g3" ;; solaris*) # # Assumed to be Sun C, which requires -errwarn to force # warnings to be treated as errors. # ac_lbl_cc_force_warning_errors=-errwarn ;; ultrix*) AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes) AC_CACHE_VAL(ac_cv_lbl_cc_const_proto, AC_TRY_COMPILE( [#include ], [struct a { int b; }; void c(const struct a *)], ac_cv_lbl_cc_const_proto=yes, ac_cv_lbl_cc_const_proto=no)) AC_MSG_RESULT($ac_cv_lbl_cc_const_proto) if test $ac_cv_lbl_cc_const_proto = no ; then AC_DEFINE(const,[], [to handle Ultrix compilers that don't support const in prototypes]) fi ;; esac $1="$$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 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]) CFLAGS="$save_CFLAGS" $1="$$1 $2" ], [ 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=: fi rm -rf conftest* else AC_MSG_RESULT([no]) # # We can't run mkdep, so have "make depend" do # nothing. # MKDEP=: fi AC_SUBST(DEPENDENCY_CFLAG) AC_SUBST(MKDEP) ]) # # Try compiling a sample of the type of code that appears in # gencode.c with "inline", "__inline__", and "__inline". # # Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough, # as it just tests whether a function returning "int" can be inlined; # at least some versions of HP's C compiler can inline that, but can't # inline a function that returns a struct pointer. # # Make sure we use the V_CCOPT flags, because some of those might # disable inlining. # AC_DEFUN(AC_LBL_C_INLINE, [AC_MSG_CHECKING(for inline) save_CFLAGS="$CFLAGS" CFLAGS="$V_CCOPT" AC_CACHE_VAL(ac_cv_lbl_inline, [ ac_cv_lbl_inline="" ac_lbl_cc_inline=no for ac_lbl_inline in inline __inline__ __inline do AC_TRY_COMPILE( [#define inline $ac_lbl_inline static inline struct iltest *foo(void); struct iltest { int iltest1; int iltest2; }; static inline struct iltest * foo() { static struct iltest xxx; return &xxx; }],,ac_lbl_cc_inline=yes,) if test "$ac_lbl_cc_inline" = yes ; then break; fi done if test "$ac_lbl_cc_inline" = yes ; then ac_cv_lbl_inline=$ac_lbl_inline fi]) CFLAGS="$save_CFLAGS" if test ! -z "$ac_cv_lbl_inline" ; then AC_MSG_RESULT($ac_cv_lbl_inline) else AC_MSG_RESULT(no) fi AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])]) dnl dnl Use pfopen.c if available and pfopen() not in standard libraries dnl Require libpcap dnl Look for libpcap in directories under ..; those are local versions. dnl Look for an installed libpcap if there is no local version or if dnl the user said not to look for a local version. dnl dnl usage: dnl dnl AC_LBL_LIBPCAP(pcapdep, incls) dnl dnl results: dnl dnl $1 (pcapdep set) dnl $2 (incls appended) dnl LIBS dnl LBL_LIBS dnl AC_DEFUN(AC_LBL_LIBPCAP, [ AC_REQUIRE([AC_PROG_EGREP]) AC_REQUIRE([AC_LBL_LIBRARY_NET]) dnl dnl save a copy before locating libpcap.a dnl LBL_LIBS="$LIBS" pfopen=/usr/examples/packetfilter/pfopen.c if test -f $pfopen ; then AC_CHECK_FUNCS(pfopen) if test $ac_cv_func_pfopen = "no" ; then AC_MSG_RESULT(Using $pfopen) LIBS="$LIBS $pfopen" fi fi libpcap=FAIL AC_MSG_CHECKING([whether to look for a local libpcap]) AC_ARG_ENABLE(local-libpcap, AS_HELP_STRING([--disable-local-libpcap], [don't look for a local libpcap @<:@default=check for a local libpcap@:>@]),, enableval=yes) case "$enableval" in no) AC_MSG_RESULT(no) # # Don't look for a local libpcap. # using_local_libpcap=no ;; *) AC_MSG_RESULT(yes) # # Look for a local pcap library. # AC_MSG_CHECKING(for local pcap library) lastdir=FAIL places=`ls $srcdir/.. | sed -e 's,/$,,' -e "s,^,$srcdir/../," | \ $EGREP '/libpcap-[[0-9]]+\.[[0-9]]+(\.[[0-9]]*)?([[ab]][[0-9]]*|-PRE-GIT|rc.)?$'` places2=`ls .. | sed -e 's,/$,,' -e "s,^,../," | \ $EGREP '/libpcap-[[0-9]]+\.[[0-9]]+(\.[[0-9]]*)?([[ab]][[0-9]]*|-PRE-GIT|rc.)?$'` for dir in $places $srcdir/../libpcap ../libpcap $srcdir/libpcap $places2 ; do basedir=`echo $dir | sed -e 's/[[ab]][[0-9]]*$//' | \ sed -e 's/-PRE-GIT$//' ` if test $lastdir = $basedir ; then dnl skip alphas when an actual release is present continue; fi lastdir=$dir if test -r $dir/libpcap.a ; then libpcap=$dir/libpcap.a local_pcap_dir=$dir dnl continue and select the last one that exists fi done if test $libpcap = FAIL ; then # # We didn't find a local libpcap. # AC_MSG_RESULT(not found) using_local_libpcap=no; else # # We found a local libpcap. # AC_MSG_RESULT($libpcap) using_local_libpcap=yes fi ;; esac if test $using_local_libpcap = no ; then # # We didn't find a local libpcap. # Look for an installed pkg-config. # if test -n "$PKG_CONFIG" ; then # # We have it. Are there .pc files for libpcap? # # --exists was introduced in pkg-config 0.4.0; that # dates back to late 2000, so we won't worry about # earlier releases that lack it. # AC_MSG_CHECKING(whether there are .pc files for libpcap) if "$PKG_CONFIG" libpcap --exists ; then # # Yes, so we can use pkg-config to get configuration # information for libpcap. # AC_MSG_RESULT(yes) pkg_config_usable=yes else # # No, so we can't use pkg-config to get configuration # information for libpcap. # AC_MSG_RESULT(no) pkg_config_usable=no fi else # # We don't have it, so we obviously can't use it. # pkg_config_usable=no fi if test "$pkg_config_usable" = "yes" ; then # # Found both - use pkg-config to get the include flags for # libpcap and the flags to link with libpcap. # # Please read section 11.6 "Shell Substitutions" # in the autoconf manual before doing anything # to this that involves quoting. Especially note # the statement "There is just no portable way to use # double-quoted strings inside double-quoted back-quoted # expressions (pfew!)." # cflags=`"$PKG_CONFIG" libpcap --cflags` $2="$cflags $$2" libpcap=`"$PKG_CONFIG" libpcap --libs` else # # No pkg-config # Look for an installed pcap-config. # AC_PATH_TOOL(PCAP_CONFIG, pcap-config) if test -n "$PCAP_CONFIG" ; then # # Found - use it to get the include flags for # libpcap and the flags to link with libpcap. # # If this is a vendor-supplied pcap-config, which # we define as being "a pcap-config in /usr/bin # or /usr/ccs/bin" (the latter is for Solaris and # Sun/Oracle Studio), there are some issues. Work # around them. # if test \( "$PCAP_CONFIG" = "/usr/bin/pcap-config" \) -o \ \( "$PCAP_CONFIG" = "/usr/ccs/bin/pcap-config" \) ; then # # It's vendor-supplied. # case "$host_os" in darwin*) # # This is macOS or another Darwin-based OS. # # That means that /usr/bin/pcap-config it # may provide -I/usr/local/include with --cflags # and -L/usr/local/lib with --libs, rather than # pointing to the OS-supplied library and # Xcode-supplied headers. Remember that, so we # ignore those values. # _broken_apple_pcap_config=yes # # Furthermore: # # macOS Sonoma's libpcap includes stub versions # of the remote-capture APIs. They are exported # as "weakly linked symbols". # # Xcode 15 offers only a macOS Sonoma SDK, which # has a .tbd file for libpcap that claims it # includes those APIs. (Newer versions of macOS # don't provide the system shared libraries, # they only provide the dyld shared cache # containing those libraries, so the OS provides # SDKs that include a .tbd file to use when # linking.) # # This means that AC_CHECK_FUNCS() will think # that the remote-capture APIs are present, # including pcap_open() and # pcap_findalldevs_ex(). # # However, they are *not* present in macOS # Ventura and earlier, which means that building # on Ventura with Xcode 15 produces executables # that fail to start because one of those APIs # isn't found in the system libpcap. # # Protecting calls to those APIs with # __builtin_available() does not appear to # prevent this, for some unknown reason, and it # doesn't even allow the program to compile with # versions of Xcode prior to Xcode 15, as the # pcap.h file doesn't specify minimum OS # versions for those functions. # # Given all that, and given that the versions of # the remote-capture APIs in Sonoma are stubs # that always fail, there doesn't seem to be any # point in checking for pcap_open() if we're # linking against the Apple libpcap. # # However, if we're *not* linking against the # Apple libpcap, we should check for it, so that # we can use it if it's present. # # We know this is macOS and that we're using # the system-provided pcap-config to find # libpcap, so we know it'll be the system # libpcap, and note that we should not search # for remote-capture APIs. # _dont_check_for_remote_apis=yes ;; solaris*) # # This is Solaris 2 or later, i.e. SunOS 5.x. # # At least on Solaris 11; there's /usr/bin/pcap-config, # which reports -L/usr/lib with --libs, causing # the 32-bit libraries to be found, and there's # /usr/bin/{64bitarch}/pcap-config, where {64bitarch} # is a name for the 64-bit version of the instruction # set, which reports -L /usr/lib/{64bitarch}, causing # the 64-bit libraries to be found. # # So if we're building 64-bit targets, we replace # PCAP_CONFIG with /usr/bin/{64bitarch}; we get # {64bitarch} as the output of "isainfo -n". # # Are we building 32-bit or 64-bit? Get the # size of void *, and check that. # AC_CHECK_SIZEOF([void *]) if test ac_cv_sizeof_void_p -eq 8 ; then isainfo_output=`isainfo -n` if test ! -z "$isainfo_output" ; then # # Success - change PCAP_CONFIG. # PCAP_CONFIG=`echo $PCAP_CONFIG | sed "s;/bin/;/bin/$isainfo_output/;"` fi fi ;; esac fi # # Please read section 11.6 "Shell Substitutions" # in the autoconf manual before doing anything # to this that involves quoting. Especially note # the statement "There is just no portable way to use # double-quoted strings inside double-quoted back-quoted # expressions (pfew!)." # cflags=`"$PCAP_CONFIG" --cflags` # # Work around macOS (and probably other Darwin) brokenness, # by not adding /usr/local/include if it's from the broken # Apple pcap-config. # if test "$_broken_apple_pcap_config" = "yes" ; then # # Strip -I/usr/local/include with sed. # cflags=`echo $cflags | sed 's;-I/usr/local/include;;'` fi $2="$cflags $$2" libpcap=`"$PCAP_CONFIG" --libs` # # Work around macOS (and probably other Darwin) brokenness, # by not adding /usr/local/lib if it's from the broken # Apple pcap-config. # if test "$_broken_apple_pcap_config" = "yes" ; then # # Strip -L/usr/local/lib with sed. # libpcap=`echo $libpcap | sed 's;-L/usr/local/lib;;'` fi else # # Not found; look for an installed pcap. # AC_CHECK_LIB(pcap, main, libpcap="-lpcap") if test $libpcap = FAIL ; then AC_MSG_ERROR(see the INSTALL.md file for more info) fi dnl dnl Some versions of Red Hat Linux put "pcap.h" in dnl "/usr/include/pcap"; had the LBL folks done so, dnl that would have been a good idea, but for dnl the Red Hat folks to do so just breaks source dnl compatibility with other systems. dnl dnl We work around this by assuming that, as we didn't dnl find a local libpcap, libpcap is in /usr/lib or dnl /usr/local/lib and that the corresponding header dnl file is under one of those directories; if we don't dnl find it in either of those directories, we check to dnl see if it's in a "pcap" subdirectory of them and, dnl if so, add that subdirectory to the "-I" list. dnl dnl (We now also put pcap.h in /usr/include/pcap, but we dnl leave behind a /usr/include/pcap.h that includes it, dnl so you can still just include .) dnl AC_MSG_CHECKING(for extraneous pcap header directories) if test \( ! -r /usr/local/include/pcap.h \) -a \ \( ! -r /usr/include/pcap.h \); then if test -r /usr/local/include/pcap/pcap.h; then d="/usr/local/include/pcap" elif test -r /usr/include/pcap/pcap.h; then d="/usr/include/pcap" fi fi if test -z "$d" ; then AC_MSG_RESULT(not found) else $2="-I$d $$2" AC_MSG_RESULT(found -- -I$d added) fi fi fi else # # We found a local libpcap. Add it to the dependencies for # tcpdump. # $1=$libpcap # # Look for its pcap-config script. # AC_PATH_PROG(PCAP_CONFIG, pcap-config,, $local_pcap_dir) if test -n "$PCAP_CONFIG"; then # # We don't want its --cflags or --libs output, because # those presume it's installed. For the C compiler flags, # we add the source directory for the local libpcap, so # we pick up its header files. # # We do, however, want its additional libraries, as required # when linking statically, because it makes calls to # routines in those libraries, so we'll need to link with # them, because we'll be linking statically with it. # # If it supports --static-pcap-only. use that, as we will be # linking with a static libpcap but won't be linking # statically with any of the libraries on which it depends; # those libraries might not even have static versions # installed. # # That means we need to find out the libraries on which # libpcap directly depends, so we can link with them, but we # don't need to link with the libraries on which those # libraries depend as, on all UN*Xes with which I'm # familiar, the libraries on which a shared library depends # are stored in the library and are automatically loaded by # the run-time linker, without the executable having to be # linked with those libraries. (This allows a library to be # changed to depend on more libraries without breaking that # library's ABI.) # # The only way to test for that support is to see if the # script contains the string "static-pcap-only"; we can't # try using that flag and checking for errors, as the # versions of the script that didn't have that flag wouldn't # report or return an error for an unsupported command-line # flag. Those older versions provided, with --static, only # the libraries on which libpcap depends, not the # dependencies of those libraries; the versions with # --static-pcap-only provide all the dependencies with # --static, for the benefit of programs that are completely # statically linked, and provide only the direct # dependencies with --static-pcap-only. # if grep "static-pcap-only" "$PCAP_CONFIG" >/dev/null 2>&1 then static_opt="--static-pcap-only" else static_opt="--static" fi $2="-I$local_pcap_dir $$2" additional_libs=`"$PCAP_CONFIG" $static_opt --additional-libs` libpcap="$libpcap $additional_libs" else # # It doesn't have a pcap-config script. # Make sure it has a pcap.h file. # places=`ls $srcdir/.. | sed -e 's,/$,,' -e "s,^,$srcdir/../," | \ $EGREP '/libpcap-[[0-9]]*.[[0-9]]*(.[[0-9]]*)?([[ab]][[0-9]]*)?$'` places2=`ls .. | sed -e 's,/$,,' -e "s,^,../," | \ $EGREP '/libpcap-[[0-9]]*.[[0-9]]*(.[[0-9]]*)?([[ab]][[0-9]]*)?$'` pcapH=FAIL if test -r $local_pcap_dir/pcap.h; then pcapH=$local_pcap_dir else for dir in $places $srcdir/../libpcap ../libpcap $srcdir/libpcap $places2 ; do if test -r $dir/pcap.h ; then pcapH=$dir fi done fi if test $pcapH = FAIL ; then AC_MSG_ERROR(cannot find pcap.h: see the INSTALL.md file) fi # # Force the compiler to look for header files in the # directory containing pcap.h. # $2="-I$pcapH $$2" fi fi if test -z "$PKG_CONFIG" -a -z "$PCAP_CONFIG"; then # # We don't have pkg-config or pcap-config; find out any additional # link flags we need. (If we have pkg-config or pcap-config, we # assume it tells us what we need.) # case "$host_os" in aix*) # # If libpcap is DLPI-based, we have to use /lib/pse.exp if # present, as we use the STREAMS routines. # # (XXX - true only if we're linking with a static libpcap?) # pseexe="/lib/pse.exp" AC_MSG_CHECKING(for $pseexe) if test -f $pseexe ; then AC_MSG_RESULT(yes) LIBS="$LIBS -I:$pseexe" fi # # If libpcap is BPF-based, we need "-lodm" and "-lcfg", as # we use them to load the BPF module. # # (XXX - true only if we're linking with a static libpcap?) # LIBS="$LIBS -lodm -lcfg" ;; solaris*) # libdlpi is needed for Solaris 11 and later. AC_CHECK_LIB(dlpi, dlpi_walk, LIBS="$LIBS -ldlpi" LDFLAGS="-L/lib $LDFLAGS", ,-L/lib) ;; esac fi LIBS="$libpcap $LIBS" dnl dnl Check for "pcap_loop()", to make sure we found a working dnl libpcap and have all the right other libraries with which dnl to link. (Otherwise, the checks below will fail, not dnl because the routines are missing from the library, but dnl because we aren't linking properly with libpcap, and dnl that will cause confusing errors at build time.) dnl AC_CHECK_FUNC(pcap_loop,, [ AC_MSG_ERROR( [ 1. Do you try to build a 32-bit tcpdump with a 64-bit libpcap or vice versa? 2. This is a bug, please follow the guidelines in CONTRIBUTING.md and include the config.log file in your report. If you have downloaded libpcap from tcpdump.org, and built it yourself, please also include the config.log file from the libpcap source directory, the Makefile from the libpcap source directory, and the output of the make process for libpcap, as this could be a problem with the libpcap that was built, and we will not be able to determine why this is happening, and thus will not be able to fix it, without that information, as we have not been able to reproduce this problem ourselves.]) ]) ]) dnl dnl Check whether a given format can be used to print 64-bit integers dnl AC_DEFUN(AC_LBL_CHECK_64BIT_FORMAT, [ AC_MSG_CHECKING([whether %$1x can be used to format 64-bit integers]) AC_RUN_IFELSE( [ AC_LANG_SOURCE( [[ # ifdef HAVE_INTTYPES_H #include # endif #include #include main() { uint64_t t = 1; char strbuf[16+1]; sprintf(strbuf, "%016$1x", t << 32); if (strcmp(strbuf, "0000000100000000") == 0) exit(0); else exit(1); } ]]) ], [ AC_DEFINE(PRId64, "$1d", [define if the platform doesn't define PRId64]) AC_DEFINE(PRIo64, "$1o", [define if the platform doesn't define PRIo64]) AC_DEFINE(PRIx64, "$1x", [define if the platform doesn't define PRIu64]) AC_DEFINE(PRIu64, "$1u", [define if the platform doesn't define PRIx64]) AC_MSG_RESULT(yes) ], [ AC_MSG_RESULT(no) $2 ]) ]) 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, -Wassign-enum) AC_LBL_CHECK_COMPILER_OPT($1, -Wcast-qual) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-prototypes) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-variable-declarations) AC_LBL_CHECK_COMPILER_OPT($1, -Wnull-pointer-subtraction) AC_LBL_CHECK_COMPILER_OPT($1, -Wold-style-definition) AC_LBL_CHECK_COMPILER_OPT($1, -Wpedantic) 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, -Wundef) AC_LBL_CHECK_COMPILER_OPT($1, -Wunreachable-code-return) AC_LBL_CHECK_COMPILER_OPT($1, -Wunused-but-set-parameter) AC_LBL_CHECK_COMPILER_OPT($1, -Wunused-but-set-variable) AC_LBL_CHECK_COMPILER_OPT($1, -Wused-but-marked-unused) AC_LBL_CHECK_COMPILER_OPT($1, -Wwrite-strings) 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? # os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'` name="lbl/os-$os.h" if test -f $name ; then 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_WARN(can't find $name) fi fi]) dnl dnl Improved version of AC_CHECK_LIB dnl dnl Thanks to John Hawkinson (jhawk@mit.edu) dnl dnl usage: dnl dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [, dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]]) dnl dnl results: dnl dnl LIBS dnl dnl XXX - "AC_LBL_LIBRARY_NET" was redone to use "AC_SEARCH_LIBS" dnl rather than "AC_LBL_CHECK_LIB", so this isn't used any more. dnl We keep it around for reference purposes in case it's ever dnl useful in the future. dnl define(AC_LBL_CHECK_LIB, [AC_MSG_CHECKING([for $2 in -l$1]) dnl Use a cache variable name containing the library, function dnl name, and extra libraries to link with, because the test really is dnl for library $1 defining function $2, when linked with potinal dnl library $5, not just for library $1. Separate tests with the same dnl $1 and different $2's or $5's may have different results. ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'` AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var, [ac_save_LIBS="$LIBS" LIBS="-l$1 $5 $LIBS" AC_TRY_LINK(dnl ifelse([$2], [main], , dnl Avoid conflicting decl of main. [/* Override any gcc2 internal prototype to avoid an error. */ ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus extern "C" #endif ])dnl [/* We use char because int might match the return type of a gcc2 builtin and then its argument prototype would still apply. */ char $2(); ]), [$2()], eval "ac_cv_lbl_lib_$ac_lib_var=yes", eval "ac_cv_lbl_lib_$ac_lib_var=no") LIBS="$ac_save_LIBS" ])dnl if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then AC_MSG_RESULT(yes) ifelse([$3], , [changequote(, )dnl ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'` changequote([, ])dnl AC_DEFINE_UNQUOTED($ac_tr_lib) LIBS="-l$1 $LIBS" ], [$3]) else AC_MSG_RESULT(no) ifelse([$4], , , [$4 ])dnl fi ]) dnl dnl AC_LBL_LIBRARY_NET dnl dnl This test is for network applications that need socket() and dnl gethostbyaddr() -ish functions. Under Solaris, those applications dnl need to link with "-lsocket -lnsl". Under IRIX, they need to link dnl with "-lnsl" but should *not* link with "-lsocket" because dnl libsocket.a breaks a number of things (for instance: dnl gethostbyaddr() under IRIX 5.2, and snoop sockets under most dnl versions of IRIX). dnl dnl Unfortunately, many application developers are not aware of this, dnl and mistakenly write tests that cause -lsocket to be used under dnl IRIX. It is also easy to write tests that cause -lnsl to be used dnl under operating systems where neither are necessary (or useful), dnl such as SunOS 4.1.4, which uses -lnsl for TLI. dnl dnl This test exists so that every application developer does not test dnl this in a different, and subtly broken fashion. dnl It has been argued that this test should be broken up into two dnl separate tests, one for the resolver libraries, and one for the dnl libraries necessary for using Sockets API. Unfortunately, the two dnl are carefully intertwined and allowing the autoconf user to use dnl them independently potentially results in unfortunate ordering dnl dependencies -- as such, such component macros would have to dnl carefully use indirection and be aware if the other components were dnl executed. Since other autoconf macros do not go to this trouble, dnl and almost no applications use sockets without the resolver, this dnl complexity has not been implemented. dnl dnl The check for libresolv is in case you are attempting to link dnl statically and happen to have a libresolv.a lying around (and no dnl libnsl.a). dnl AC_DEFUN(AC_LBL_LIBRARY_NET, [ # Most operating systems have gethostbyaddr() in the default searched # libraries (i.e. libc): # Some OSes (eg. Solaris) place it in libnsl # Some strange OSes (SINIX) have it in libsocket: AC_SEARCH_LIBS(gethostbyaddr, network nsl socket resolv) # Unfortunately libsocket sometimes depends on libnsl and # AC_SEARCH_LIBS isn't up to the task of handling dependencies like this. if test "$ac_cv_search_gethostbyaddr" = "no" then AC_CHECK_LIB(socket, gethostbyaddr, LIBS="-lsocket -lnsl $LIBS", , -lnsl) fi AC_SEARCH_LIBS(socket, socket, , AC_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", , -lnsl)) # DLPI needs putmsg under HPUX so test for -lstr while we're at it AC_SEARCH_LIBS(putmsg, str) ]) dnl Copyright (c) 1999 WIDE Project. All rights reserved. dnl dnl Redistribution and use in source and binary forms, with or without dnl modification, are permitted provided that the following conditions dnl are met: dnl 1. Redistributions of source code must retain the above copyright dnl notice, this list of conditions and the following disclaimer. dnl 2. Redistributions in binary form must reproduce the above copyright dnl notice, this list of conditions and the following disclaimer in the dnl documentation and/or other materials provided with the distribution. dnl 3. Neither the name of the project nor the names of its contributors dnl may be used to endorse or promote products derived from this software dnl without specific prior written permission. dnl dnl THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND dnl ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE dnl IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE dnl ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE dnl FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL dnl DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS dnl OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) dnl HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT dnl LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY dnl OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF dnl SUCH DAMAGE. AC_DEFUN(AC_LBL_SSLEAY, [ # # Find the last component of $libdir; it's not necessarily # "lib" - it might be "lib64" on, for example, x86-64 # Linux systems. # # We assume the directory in which we're looking for # libcrypto has a subdirectory with that as its name. # tmplib=`echo "$libdir" | sed 's,.*/,,'` # # XXX - is there a better way to check if a given library is # in a given directory than checking each of the possible # shared library suffixes? # # Are there any other suffixes we need to look for? Do we # have to worry about ".so.{version}"? # # Or should we just look for "libcrypto.*"? # if test -d "$1/$tmplib" -a \( -f "$1/$tmplib/libcrypto.a" -o \ -f "$1/$tmplib/libcrypto.so" -o \ -f "$1/$tmplib/libcrypto.sl" -o \ -f "$1/$tmplib/libcrypto.dylib" \); then ac_cv_ssleay_path="$1" fi # # Make sure we have the headers as well. # if test -d "$1/include/openssl" -a -f "$1/include/openssl/des.h"; then incdir="-I$1/include" fi ]) m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) 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