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configure.ac
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dnl +------------------------------------------------------------------+
dnl | Network UPS Tools: configure.ac |
dnl +------------------------------------------------------------------+
dnl # Support for older autoconf without m4_esyscmd_s
m4_ifndef([m4_chomp_all], [m4_define([m4_chomp_all], [m4_format([[%.*s]], m4_bregexp(m4_translit([[$1]], [/], [/ ]), [/*$]), [$1])])])
m4_ifndef([m4_esyscmd_s], [m4_define([m4_esyscmd_s], [m4_chomp_all(m4_esyscmd([$1]))])])
dnl NUT version number is defined here, with a Git suffixed macro like
dnl NUT_VERSION_MACRO "2.7.4-2838-gdfc3ac08"
dnl defined separately in include/nut_version.h (generated by make)
dnl ...or not defined, for quicker rebuilds, depending on settings.
dnl Old hard-coded approach (mangled a bit):
dnl AC INIT([nut],[2.8.2.1],[https://github.com/networkupstools/nut/issues])
dnl Note: srcdir is only set after AC INIT has completed, but $0 points
dnl to the generated configure script which is part of dist tarball and
dnl should be at source root too.
dnl Note: this gets evaluated (script called) a lot of times during autoconf
dnl but ends up as static strings in the generated configure script. It may
dnl be beneficial to have a `version.m4` generated by `autogen.sh` and/or
dnl shipped in a tarball, allowing for a singular include into configure.ac
dnl See https://github.com/networkupstools/nut/issues/1949 for details.
dnl Oddly, autoconf-2.69 on CentOS 7 both complains that AC INIT argument
dnl is not a literal, and does contain expected values in the generated
dnl script and include/config.h. A "pure" m4 solution would be quieter.
AC_INIT([nut],
m4_esyscmd_s([NUT_VERSION_QUERY=VER50 "`dirname "$0"`/tools/gitlog2version.sh" 2>/dev/null]),
[https://github.com/networkupstools/nut/issues],[nut],
m4_esyscmd_s([NUT_VERSION_QUERY=URL "`dirname "$0"`/tools/gitlog2version.sh" 2>/dev/null]))
dnl See docs/maintainer-guide.txt about releases - updating the version
dnl above is a small part of the consistent ritual!
dnl PACKAGE_URL="https://www.networkupstools.org/" for development iterations
dnl or "https://www.networkupstools.org/historic/v1.2.3/index.html" for release
dnl snapshots further set in stone. Either way, there should be a slash and
dnl either a filename, or nothing. Adding a bogus filename and chopping it
dnl off by `dirname` should do the trick.
dnl NOTE: the resulting NUT_WEBSITE_BASE string does not end with a slash!
NUT_WEBSITE_BASE="`dirname "${PACKAGE_URL}index.html"`"
dnl Fallback, no trailing slash!
test -n "${NUT_WEBSITE_BASE-}" || NUT_WEBSITE_BASE='https://www.networkupstools.org'
dnl Note: this refers to GITREV at the time of configure script running
dnl primarily for better messaging in the script itself (also to render
dnl the PDF documentation revision history via docs/docinfo.xml.in).
dnl If the NUT codebase in this workspace is being developed and rebuilt
dnl without reconfiguration, detailed version in the binaries will differ
dnl (that one comes from the NUT_VERSION_MACRO from nut_version.h file).
dnl # Example: NUT_SOURCE_GITREV='2.8.2.695.1-696-g0e00f0777'
NUT_SOURCE_GITREV="`NUT_VERSION_QUERY=DESC50 "${srcdir}/tools/gitlog2version.sh" 2>/dev/null`"
dnl A true/false (literally) response that can be used for prettier messages
dnl emitted by NUT code.
NUT_SOURCE_GITREV_IS_RELEASE="`NUT_VERSION_QUERY=IS_RELEASE "${srcdir}/tools/gitlog2version.sh" 2>/dev/null`"
AS_IF([$NUT_SOURCE_GITREV_IS_RELEASE], [NUT_SOURCE_GITREV_DEVREL="release"], [NUT_SOURCE_GITREV_DEVREL="development iteration"])
dnl Semantic version of most-recent NUT release this code is derived from.
dnl It may equal the NUT_SOURCE_GITREV and NUT_SOURCE_GITREV_NUMERIC, but
dnl this situation is only expected if NUT_SOURCE_GITREV_IS_RELEASE==true.
NUT_SOURCE_GITREV_SEMVER="`NUT_VERSION_QUERY=SEMVER "${srcdir}/tools/gitlog2version.sh" 2>/dev/null`"
dnl Gitrev-based build identifier which can be used for e.g. PyPI uploads:
dnl # Example: NUT_SOURCE_GITREV_NUMERIC='2.8.2.695.1.696'
dnl # NUT_SOURCE_GITREV_NUMERIC="`echo "${NUT_SOURCE_GITREV}" | sed -e 's/^v//' -e 's/-g.*$//' -e 's/-/./g'`"
dnl # Without the commit-count since tag (dash-separated part):
dnl # Example: NUT_SOURCE_GITREV_NUMERIC='2.8.2.695.1'
NUT_SOURCE_GITREV_NUMERIC="`echo "${NUT_SOURCE_GITREV}" | sed -e 's/^v//' -e 's/-g.*$//' -e 's/-@<:@0-9@:>@*$//'`"
dnl Note: except for experiments, do not pass this into config.h - use
dnl the NUT_VERSION_MACRO from nut_version.h instead. Developers may
dnl want to disable their "force-nut-version-header" configure option
dnl to reduce rebuild scope and so speed up the iterations with ccache.
dnl New "config.h" contents for every reconfig would defeat that purpose!
dnl ### AS_IF([test -n "${NUT_SOURCE_GITREV-}"],
dnl ### [AC_DEFINE_UNQUOTED([NUT_SOURCE_GITREV], ["${NUT_SOURCE_GITREV}"], [NUT source revision when the build was configured])],
dnl ### [AC_DEFINE([NUT_SOURCE_GITREV], [NULL], [NUT source revision when the build was configured: not detected])])
dnl Keep track of command-line options passed to this script:
AC_MSG_CHECKING([for CONFIG_FLAGS])
CONFIG_FLAGS=""
dnl Keep each token quoted, in case spaces or other special chars crawl in:
_flag_enable_inplace_runtime=""
for F in "$@" ; do
case "$F" in
*=*" "*) NF="$(echo "$F" | sed "s,=,=',")""'" && F="$NF" ;;
esac
case "$F" in
--disable-inplace-runtime|--enable-inplace-runtime=no) _flag_enable_inplace_runtime="no" ;;
--enable-inplace-runtime*) _flag_enable_inplace_runtime="$F" ;;
*)
test -z "${CONFIG_FLAGS}" \
&& CONFIG_FLAGS="$F" \
|| CONFIG_FLAGS="${CONFIG_FLAGS} $F"
;;
esac
done
dnl Keep it "known" that we tried to re-use at least some local configuration
dnl so unspecified options are not necessarily at default values for this script
AS_IF([test x"${NUT_VERSION_DEPLOYED-}" = x"<reenter>"], [_flag_enable_inplace_runtime="reenter"])
F=""
AS_IF([test x"${NUT_VERSION_DEPLOYED-}" != x && test x"${NUT_VERSION_DEPLOYED-}" != x"<reenter>"], [
dnl Even if explicitly disabled... did we re-enter? Save the value to be seen:
F="--enable-inplace-runtime='${NUT_VERSION_DEPLOYED}'"
],[
AS_CASE(["${_flag_enable_inplace_runtime}"],
[no|""|reenter], [],
[F="${_flag_enable_inplace_runtime}"])
])
AS_IF([test x"$F" != x], [
test -z "${CONFIG_FLAGS}" \
&& CONFIG_FLAGS="$F" \
|| CONFIG_FLAGS="${CONFIG_FLAGS} $F"
])
unset _flag_enable_inplace_runtime
unset F
unset NF
AC_MSG_RESULT([${CONFIG_FLAGS}])
AC_DEFINE_UNQUOTED([CONFIG_FLAGS],["${CONFIG_FLAGS}"],[Flags passed to configure script])
AC_SUBST(CONFIG_FLAGS)
AC_CONFIG_AUX_DIR([.])
AC_CONFIG_SRCDIR(server/upsd.c)
AC_CONFIG_MACRO_DIR([m4])
AS_IF([test x"${NUT_SOURCE_GITREV}" = x],
[echo "Network UPS Tools version ${PACKAGE_VERSION}"],
[AS_IF([test x"${NUT_SOURCE_GITREV}" = x"${PACKAGE_VERSION}"],
[echo "Network UPS Tools version ${PACKAGE_VERSION} ${NUT_SOURCE_GITREV_DEVREL}"],
[echo "Network UPS Tools version ${PACKAGE_VERSION} (${NUT_SOURCE_GITREV}) ${NUT_SOURCE_GITREV_DEVREL}"])
])
AC_CANONICAL_TARGET
NUT_CHECK_OS
dnl Further below we shuffle variants of these values possibly stripped of
dnl warnings or with added further values. Here we save the most-original copy
dnl so it can be passed e.g. to "make distcheck" the way the caller intended.
NUT_CONFIG_CFLAGS=""
NUT_CONFIG_CPPFLAGS=""
NUT_CONFIG_CXXFLAGS=""
NUT_CONFIG_LDFLAGS=""
AS_IF([test -n "${CFLAGS-}" -a x"${CFLAGS-}" != x" "],
[NUT_CONFIG_CFLAGS="${CFLAGS-}"])
AS_IF([test -n "${CXXFLAGS-}" -a x"${CXXFLAGS-}" != x" "],
[NUT_CONFIG_CXXFLAGS="${CXXFLAGS-}"])
AS_IF([test -n "${CPPFLAGS-}" -a x"${CPPFLAGS-}" != x" "],
[NUT_CONFIG_CPPFLAGS="${CPPFLAGS-}"])
AS_IF([test -n "${LDFLAGS-}" -a x"${LDFLAGS-}" != x" "],
[NUT_CONFIG_LDFLAGS="${LDFLAGS-}"])
AC_SUBST([NUT_CONFIG_CFLAGS])
AC_SUBST([NUT_CONFIG_CXXFLAGS])
AC_SUBST([NUT_CONFIG_CPPFLAGS])
AC_SUBST([NUT_CONFIG_LDFLAGS])
NUT_STASH_WARNINGS
AC_CONFIG_HEADERS([include/config.h])
AC_PREFIX_DEFAULT(/usr/local/ups)
AM_INIT_AUTOMAKE([subdir-objects])
AS_CASE([${target_os}],
[*mingw*], [AS_CASE([${CFLAGS-}${CXXFLAGS-}],
[*"-std=c"*|*-ansi*], [
AC_MSG_NOTICE(
[-----------------------------------------------------------------------
WARNING: It seems you are building with MinGW and requested a strict C/C++
language mode. Per https://stackoverflow.com/a/76780217/4715872 MinGW may
not define WIN32 and other options needed for proper building and linking.
If this happens, please retry with GNU C/C++ language mode options instead.
-----------------------------------------------------------------------])
sleep 5
])]
)
dnl +-------------------------------------------------------------------
dnl Help avoid "polluting" CFLAGS etc. with auto-settings like "-g -O2"
dnl at least if we intend to tune --with-debuginfo anyway (where we check
dnl if the caller asked for specific optimizations). Following some
dnl experimentation, we do not want to actually mangle the flags provided
dnl by autoconf - for GCC at least, the rightmost mentions of conflicting
dnl flags on command line win. We just want to know when it is okay to add
dnl ours. They may be inherited from "in-place" build setup though.
test -n "${CONFIG_CFLAGS-}" || CONFIG_CFLAGS="${CFLAGS-}"
test -n "${CONFIG_CXXFLAGS-}" || CONFIG_CXXFLAGS="${CXXFLAGS-}"
test -n "${CONFIG_CPPFLAGS-}" || CONFIG_CPPFLAGS="${CPPFLAGS-}"
test -n "${CONFIG_LDFLAGS-}" || CONFIG_LDFLAGS="${LDFLAGS-}"
AC_SUBST([CONFIG_CFLAGS])
AC_SUBST([CONFIG_CXXFLAGS])
AC_SUBST([CONFIG_CPPFLAGS])
AC_SUBST([CONFIG_LDFLAGS])
dnl +-------------------------------------------------------------------
dnl Default to `configure --enable-silent-rules` or `make V=1` for details?
dnl This feature seems to require automake-1.13 or newer (1.11+ by other info)
dnl On very old systems can comment it away with little loss (then automake-1.10
dnl is known to suffice):
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
[AC_MSG_NOTICE([Silent Rules feature not defined in this automake version, skipped])])
dnl +-------------------------------------------------------------------
dnl we need Autoconf 2.61 or better to enable features of Posix that are extensions to C
dnl (and actually 2.64 or better for m4/ax_check_compile_flag.m4 when it is sourced)
dnl UPDATE: As tested on CentOS 6, its "autoconf-2.63-5.1.el6.noarch" also suffices.
dnl But OpenBSD 6.5 requires autoconf-2.65 and automake-1.13 or newer...
dnl AC_MSG_NOTICE([CFLAGS_BEFORE_ACPROG="${CFLAGS-}"])
dnl AC_MSG_NOTICE([CXXFLAGS_BEFORE_ACPROG="${CXXFLAGS-}"])
AC_MSG_CHECKING(for autoconf macro to enable system extensions)
m4_version_prereq(2.61, [
AC_MSG_RESULT(yes)
dnl Causes calls to ac_prog stuff, so dittoed below if "no"
AC_USE_SYSTEM_EXTENSIONS
], [
AC_MSG_RESULT(no)
AC_PROG_CC
])
AC_PREREQ([2.63])
dnl #AC_PREREQ([2.64])
dnl Macro AC_PROG_CC_C99 is obsolete; use AC_PROG_CC
dnl Note that NUT does not support building with C89 anyway
dnl AC_PROG_CC_C99
dnl Needed for per-target flags
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_CXX_C_O
CFLAGS_AFTER_ACPROG="${CFLAGS-}"
CXXFLAGS_AFTER_ACPROG="${CXXFLAGS-}"
dnl AC_MSG_NOTICE([CFLAGS_AFTER_ACPROG="${CFLAGS-}"])
dnl AC_MSG_NOTICE([CXXFLAGS_AFTER_ACPROG="${CXXFLAGS-}"])
dnl # LEGACY DEFAULT FALLBACK which NUT had since 2005 or before:
dnl # if autoconf does not set any options, use default/moderate optimizations
CFLAGS=${CFLAGS-"-O"}
dnl # Not so far a legacy, added for consistency in 2024 :)
CXXFLAGS=${CXXFLAGS-"-O"}
dnl Check for various integer types
AC_TYPE_SSIZE_T
AC_TYPE_INTMAX_T
AC_TYPE_INT8_T
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_INT64_T
AC_TYPE_SIZE_T
AC_TYPE_UINTMAX_T
AC_TYPE_UINT8_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT64_T
dnl +-------------------------------------------------------------------
dnl Use "./configure --enable-maintainer-mode" to keep Makefile.in and Makefile
dnl in sync after Git updates.
AM_MAINTAINER_MODE
dnl GNU and BSD make are okay with the syntax, but Sun make/dmake are not:
AC_MSG_CHECKING([whether this make implementation supports export VAR=VAL syntax])
dnl # using printf formatting for some funniner shells out there
nut_am_output="`printf 'export VAR=VAL\ntest:\n\t@echo "VAR=%s%sVAR%s"\n' '\$' '(' ')' | ${MAKE-make} -f - test`"
nut_am_result="$?"
AS_IF([test x"${nut_am_result}" = x0 -a x"${nut_am_output}" = x"VAR=VAL"], [
NUT_AM_MAKE_CAN_EXPORT=""
AC_MSG_RESULT(yes)
], [
NUT_AM_MAKE_CAN_EXPORT="#ThisMakeCanNotExport# "
AC_MSG_RESULT(no: got '${nut_am_output}')
])
AC_SUBST(NUT_AM_MAKE_CAN_EXPORT)
dnl Some systems have older autotools without direct macro support for PKG_CONF*
NUT_CHECK_PKGCONFIG
dnl Various version related processing
dnl ----------------------------------
dnl # the following is commented out, because the UPS_VERSION macro now
dnl # resides in include/nut_version.h, which is generated by Makefile.am,
dnl # rather than in include/config.h, which is generated by configure. The
dnl # reason is that the SVN revision should be computed at compile time,
dnl # not configure time.
dnl AC_DEFINE_UNQUOTED(UPS_VERSION, "${PACKAGE_VERSION}", [NUT version])
dnl However, automatically define the tree version (mostly for AC_SUBST)
dnl FIXME: This just picks first 3 chars, assuming single-digit components
dnl separated by a dot:
TREE_VERSION="`echo ${PACKAGE_VERSION} | awk '{ print substr($0,1,3) }'`"
AC_DEFINE_UNQUOTED(TREE_VERSION, "${TREE_VERSION}", [NUT tree version])
dnl Should not be necessary, since old servers have well-defined errors for
dnl unsupported commands:
NUT_NETVERSION="1.3"
AC_DEFINE_UNQUOTED(NUT_NETVERSION, "${NUT_NETVERSION}", [NUT network protocol version])
dnl Fix this early so we can expand with eval later
test "${prefix}" = "NONE" && prefix="${ac_default_prefix}"
test "${exec_prefix}" = "NONE" && exec_prefix='${prefix}'
dnl Note: for practical and platform-independent use, see AX_REALPATH macro
AC_CHECK_PROGS([REALPATH], [realpath], [])
dnl FIXME: remove after dev-testing
dnl UNITTEST_AX_REALPATH
dnl exit
dnl NOTE: for definition of NUT_* autoconf macros, see m4/ directory
dnl and docs/macros.txt
dnl +------------------------------------------------------------------+
dnl | default values for things later on (can be overridden) |
STATEPATH="/var/state/ups"
dnl Historically this refers to *system location* for PID files,
dnl and more specifically that for `upsmon` (running as `root`).
dnl See also ALTPIDPATH (defaulted to STATEPATH) setting below
dnl for the unprivileged daemons (`upsd`, drivers).
PIDPATH="/var/run"
dnl Honour new LFS recommendations if applied on the build system:
AS_IF([test -d "/run"], [PIDPATH="/run"])
AC_CHECK_PROGS([GETENT], [getent], [])
AC_CHECK_PROGS([ID], [id], [])
PROBE_OS_USER="false"
PROBE_OS_GROUP="false"
AS_IF([test x"${GETENT}" != x], [
PROBE_OS_USER="${GETENT} passwd "
PROBE_OS_GROUP="${GETENT} group "
],[
AS_IF([test x"${ID}" != x], [
PROBE_OS_USER="${ID} -u "
AS_IF([test -r "/etc/groups"], [
dnl FIXME: For command prefix usage like used in this
dnl script, we might be better off defining a shell
dnl function and referring to it. Grep would catch
dnl also user names that have a group as secondary!
PROBE_OS_GROUP="cat /etc/groups | grep -w "
], [
dnl This shows groups of a USER with specified name!
dnl But to probe for cases where string names are
dnl same (e.g. "nut" or "ups") this might be good
dnl enough.
PROBE_OS_GROUP="${ID} -g "
])
AC_MSG_WARN([Can not PROPERLY check existence of group accounts on this system, but can try best-effort])
],[
AC_MSG_WARN([Can not check existence of user and group accounts on this system])
])
]
)
dnl Defaults for respective configure options below
dnl Note these defaults may change further below depending on OS and
dnl certain other configure options (e.g. "in-place replacement")
RUN_AS_USER="nobody"
RUN_AS_GROUP="nobody"
AS_IF([test -n "`${PROBE_OS_GROUP} nogroup`" && ! test -n "`${PROBE_OS_GROUP} "${RUN_AS_GROUP}"`"],
[RUN_AS_GROUP="nogroup"]
)
dnl NOTE: NUT legacy default, keep as is for least surprise
dnl Distributions are however welcome to specify the option to use tmpfs
AS_CASE([${target_os}],
[*mingw*], [POWERDOWNFLAG="C:\\\\killpower"], dnl NOTE: Double backslashes (times escaping) are correct!
[POWERDOWNFLAG="/etc/killpower"] dnl POSIX systems default
)
cgiexecdir='${exec_prefix}/cgi-bin'
driverexecdir='${exec_prefix}/bin'
dnl Note: htmldir per se is originally for nut-cgi resources
htmldir='${prefix}/html'
htmldocdir='${docdir}/html-doc'
htmlmandir='${docdir}/html-man'
pkgconfigdir='${libdir}/pkgconfig'
dnl Detection of augeas lens dirs is a bit troublesome, since
dnl they (if present) reside in location not controlled by NUT.
dnl Try detecting based on build parameters, or fall back to
dnl hard-coded default location (may break e.g. distcheck).
dnl Note it would not work too well for "/usr/local/ups" :)
auglensdir='${datarootdir}/augeas/lenses/dist'
conftemp="${auglensdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
if test ! -d "${conftemp}"; then
auglensdir='${datarootdir}/augeas/lenses'
conftemp="${auglensdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
if test ! -d "${conftemp}"; then
auglensdir='/usr/share/augeas/lenses/dist'
if test ! -d "${auglensdir}"; then
auglensdir='/usr/share/augeas/lenses'
if test ! -d "${auglensdir}"; then
auglensdir=''
fi
fi
fi
fi
dnl ### NUT_CHECK_LIBREGEX ### Detect below as part of libusb etc.
dnl ### LIBREGEX_LIBS=''
dnl Disable Hotplug, DevD and udev support on Windows
dnl (useful when cross-compiling)
case "${target_os}" in
*mingw* )
dnl TODO: Actually detect it? See also nut_check_libregex.m4 for same.
dnl Here we assumed from practice that it is available...
dnl ### if test x"${LIBREGEX_LIBS}" = x ; then
dnl ### LIBREGEX_LIBS='-lregex'
dnl ### fi
hotplugdir=''
udevdir=''
devddir=''
;;
* )
hotplugdir='/etc/hotplug'
if test ! -d "${hotplugdir}"; then
hotplugdir=''
fi
udevdir='/lib/udev'
if test ! -d "${udevdir}"; then
udevdir='/etc/udev'
if test ! -d "${udevdir}"; then
udevdir=''
fi
fi
devddir='/usr/local/etc/devd'
if test ! -d "${devddir}"; then
devddir='/etc/devd'
if test ! -d "${devddir}"; then
devddir=''
fi
fi
;;
esac
dnl Note: this deals with run-time settings so that the newly built
dnl programs can be "just executed" to use same configuration files
dnl and filesystem object permissions as an older deployment of NUT
dnl on this system; this specifically does not deal with trying to
dnl use same prefix and other paths to fully replace an older setup
dnl (a different option might be crafted to do that, but really the
dnl arcane distro-dependent packaging recipes are a better way here).
dnl This feature is intended for users who want to see if a custom
dnl build of NUT supports their hardware or other use-cases better.
NUT_ARG_ENABLE([inplace-runtime],
[Request configure option defaults for runtime user/group/confpath based on currently installed NUT (to extent these can be detected)],
[no])
dnl Check for not re-entering in this run - whether NUT_VERSION_DEPLOYED is set
AS_IF([test x"$nut_enable_inplace_runtime" = xyes -a x"${NUT_VERSION_DEPLOYED-}" = x], [
AC_MSG_NOTICE([checking for location, CONFIG_FLAGS and version of an already deployed NUT build (if it reports those)])
dnl If existing NUT installation reports its build options, re-run this
dnl script with those flags (overridden by any options passed currently):
conftemp="${sbindir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
PREFIX_SBINDIR="${conftemp}"
conftemp="${bindir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
PREFIX_BINDIR="${conftemp}"
DEPLOYED_SBINDIR="${PREFIX_SBINDIR}"
DEPLOYED_BINDIR="${PREFIX_BINDIR}"
dnl Note use of AC_PATH_PROG for specific pathname (not AC_CHECK_PROGS which picks filename variants)!
dnl Note: "ordinary" users might not have "sbin" in their default PATH, so appending it:
dnl Note: in some systems, the file in PATH is a shell
dnl wrapper for /etc/nut/nut.conf MODE support
AC_PATH_PROG([DEPLOYED_UPSD], [upsd], [], [${PREFIX_SBINDIR}:${PATH}:/sbin:/usr/sbin:/usr/local/sbin])
dnl ...however "upsc" is a userland tool so should be there:
AC_PATH_PROG([DEPLOYED_UPSC], [upsc], [], [${PREFIX_BINDIR}:${PATH}])
AS_IF([test -x "${DEPLOYED_UPSD}"], [
AX_REALPATH([$DEPLOYED_UPSD], [DEPLOYED_UPSD])
DEPLOYED_SBINDIR="`dirname "${DEPLOYED_UPSD}"`"
])
AS_IF([test -x "${DEPLOYED_UPSC}"], [
AX_REALPATH([$DEPLOYED_UPSC], [DEPLOYED_UPSC])
DEPLOYED_BINDIR="`dirname "${DEPLOYED_UPSC}"`"
])
DEPLOYED_PREFIX=""
AS_IF([test -d "${DEPLOYED_SBINDIR}"],
[DEPLOYED_PREFIX="`dirname "${DEPLOYED_SBINDIR}"`"],
[AS_IF([test -d "${DEPLOYED_BINDIR}"],
[DEPLOYED_PREFIX="`dirname "${DEPLOYED_BINDIR}"`"])]
)
AC_MSG_CHECKING([for CONFIG_FLAGS of an already deployed NUT build (if it reports those)])
CONFIG_FLAGS_DEPLOYED=""
NUT_VERSION_DEPLOYED=""
dnl TODO: Similar query can be done for BINDIR tools
dnl and for libupsclient-config if deployed locally
for DEPLOYED_TOOL in \
"${DEPLOYED_UPSD}" \
"${DEPLOYED_UPSC}" \
; do
AS_IF([test x"${DEPLOYED_TOOL}" = x], [continue])
AS_IF([test -x "${DEPLOYED_TOOL}"], [], [continue])
AC_MSG_CHECKING([for CONFIG_FLAGS from ${DEPLOYED_TOOL}])
CONFIG_FLAGS_DEPLOYED="`"${DEPLOYED_TOOL}" -DV 2>&1 | grep 'configured with flags:' | head -1 | sed 's,^.*configured with flags: *,,'`" \
&& test x"${CONFIG_FLAGS_DEPLOYED}" != x \
|| CONFIG_FLAGS_DEPLOYED=""
dnl NOTE: Currntly NUT_VERSION_DEPLOYED is just informative (or a flag
dnl that we've "reentered" the configuration script), so we tolerate a
dnl better detailed string that is more than just a version, e.g.:
dnl 2.8.2.1829-1829-g8f8a4f417 (development iteration after 2.8.2) built with gcc (Debian 10.2.1-6) 10.2.1 20210110
NUT_VERSION_DEPLOYED="`"${DEPLOYED_TOOL}" -DV 2>&1 | grep 'configured with flags:' | head -1 | sed -e 's,^.*Network UPS Tools version \(.*\) configured with flags:.*$,\1,' -e 's, and *$,,'`" \
&& test x"${NUT_VERSION_DEPLOYED}" != x \
|| NUT_VERSION_DEPLOYED=""
AS_IF([test x"${CONFIG_FLAGS_DEPLOYED}${NUT_VERSION_DEPLOYED}" = x], [], [break])
done
AS_IF([test x"${CONFIG_FLAGS_DEPLOYED}" != x], [
AC_MSG_RESULT([CONFIG_FLAGS_DEPLOYED: ${CONFIG_FLAGS_DEPLOYED}])
],[
AC_MSG_RESULT([CONFIG_FLAGS_DEPLOYED: not reported])
])
dnl Account for custom paths if known/found:
AS_IF([test x"${DEPLOYED_PREFIX}" != x && test x"${DEPLOYED_PREFIX}" != x"${prefix}"],
AC_MSG_WARN([Deployed NUT installation uses a PREFIX different from one specified (wins) or derived (loses) for this build: '${DEPLOYED_PREFIX}' vs. '${prefix}'])
[AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--prefix=*], [],
[CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --prefix='${DEPLOYED_PREFIX}'"])
])
AS_IF([test x"${DEPLOYED_SBINDIR}" != x && test x"${DEPLOYED_SBINDIR}" != x"${PREFIX_SBINDIR}"],
AC_MSG_WARN([Deployed NUT installation uses a SBINDIR different from one specified (wins) or derived (loses) for this build: '${DEPLOYED_SBINDIR}' vs. '${sbindir}'])
[AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--sbindir=*], [],
[CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --sbindir='${DEPLOYED_SBINDIR}'"])
])
AS_IF([test x"${DEPLOYED_BINDIR}" != x && test x"${DEPLOYED_BINDIR}" != x"${PREFIX_BINDIR}"],
AC_MSG_WARN([Deployed NUT installation uses a BINDIR different from one specified (wins) or derived (loses) for this build: '${DEPLOYED_BINDIR}' vs. '${bindir}'])
[AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--bindir=*], [],
[CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --bindir='${DEPLOYED_BINDIR}'"])
])
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--sysconfdir=*], [
for F in ${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS} ; do
case "$F" in
"--sysconfdir="*) sysconfdir="`echo "$F" | ( IFS='=' read K V ; echo "$V" )`" ;;
esac
done
],
[
dnl If there was no custom --sysconfdir=/etc/myNUT passed,
dnl try to default it to something from existing deployment.
dnl NOTE: Single-quotes are correct for autotools default,
dnl expanded at runtime (see conftemp tricks below)
AC_MSG_CHECKING([for in-place replacement default sysconfdir (better than '${sysconfdir}')])
DEPLOYED_SYSCONFDIR=""
dnl TODO: Any more reasonable defaults? Pile them on here :)
for D in \
/etc/nut /etc/ups \
/usr/etc/nut /usr/etc/ups \
/usr/local/etc/nut /usr/local/etc/ups \
/usr/local/nut/etc /usr/local/ups/etc \
; do
if test -e "$D/ups.conf" || test -e "$D/upsmon.conf" \
|| ( test -e "$D/upsd.conf" && test -e "$D/upsd.users" ) \
; then
DEPLOYED_SYSCONFDIR="$D"
break
else
if test -d "$D/" && test ! -r "$D/" ; then
dnl Keeping order of preference defined by "for" loop:
AC_MSG_WARN([Picking directory '${D}' which exists but current build user may not read])
DEPLOYED_SYSCONFDIR="$D"
break
fi
fi
done
AS_IF([test -n "${DEPLOYED_SYSCONFDIR}"], [
AC_MSG_RESULT([${DEPLOYED_SYSCONFDIR}])
dnl May be used in searches below:
sysconfdir="${DEPLOYED_SYSCONFDIR}"
CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --sysconfdir='${DEPLOYED_SYSCONFDIR}'"
], [
AC_MSG_RESULT([not detected])
])
])
dnl Prepare paths that may be used in user/group searches below:
conftemp="${sysconfdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
CONFPATH="${conftemp}"
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--libdir=*], [
for F in ${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS} ; do
case "$F" in
"--libdir="*) libdir="`echo "$F" | ( IFS='=' read K V ; echo "$V" )`" ;;
esac
done
]
)
conftemp="${libdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
LIBDIR="${conftemp}"
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--libexecdir=*], [
for F in ${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS} ; do
case "$F" in
"--libexecdir="*) libexecdir="`echo "$F" | ( IFS='=' read K V ; echo "$V" )`" ;;
esac
done
]
)
conftemp="${libexecdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
LIBEXECDIR="${conftemp}"
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--with-pkgconfig-dir=*], [
for F in ${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS} ; do
case "$F" in
"--with-pkgconfig-dir="*) pkgconfigdir="`echo "$F" | ( IFS='=' read K V ; echo "$V" )`" ;;
esac
done
]
)
dnl pkgconfigdir may have more indirections:
conftemp="${pkgconfigdir}"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
eval conftemp=\"${conftemp}\"
PKGCONFIGDIR="${conftemp}"
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--with-group=*], [],
[
AC_MSG_CHECKING([for in-place replacement default group (better than '${RUN_AS_GROUP}')])
nut_inplace_group=""
AS_IF([test -d "${udevdir}/rules.d"],
[for F in "${udevdir}/rules.d"/*-nut-*.rules ; do
if test -s "$F" ; then
nut_inplace_group="`grep GROUP= "$F" | head -1 | sed 's,^.* GROUP="*\(.*\)"*.*$,\1,'`" \
&& test -n "`${PROBE_OS_GROUP} "${nut_inplace_group}"`" \
&& AC_MSG_RESULT([Got from ${F}]) \
&& break \
|| nut_inplace_group=""
fi
done
])
AS_IF([test -z "${nut_inplace_group}"],
[AS_IF([test -n "`${PROBE_OS_GROUP} nut`"], [nut_inplace_group="nut"],
[AS_IF([test -n "`${PROBE_OS_GROUP} ups`"], [nut_inplace_group="ups"])])])
AS_IF([test -n "${nut_inplace_group}"], [
AC_MSG_RESULT([${nut_inplace_group}])
CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --with-group='${nut_inplace_group}'"
], [
AC_MSG_RESULT([not detected])
])
])
AS_CASE(["${CONFIG_FLAGS_DEPLOYED} ${CONFIG_FLAGS}"],
[*--with-user=*], [],
[
AC_MSG_CHECKING([for in-place replacement default user (better than '${RUN_AS_USER}')])
nut_inplace_user=""
dnl Beside currently active setting, check the built-in default sugestion
AS_IF([test -s "${CONFPATH}/upsmon.conf"],
[for nut_inplace_user in \
`grep -E '^ *RUN_AS_USER' "${CONFPATH}/upsmon.conf" | awk '{print $2}'`\
`grep -E '^ *##*RUN_AS_USER' "${CONFPATH}/upsmon.conf" | awk '{print $2}'`\
`grep -E '^ *##* *RUN_AS_USER' "${CONFPATH}/upsmon.conf" | awk '{print $3}'`\
; do \
AS_IF([test -z "${nut_inplace_user}"], [
test -n "`${PROBE_OS_USER} "${nut_inplace_user}"`" \
&& AC_MSG_RESULT([Got from ${CONFPATH}/upsmon.conf]) \
|| nut_inplace_user=""])
done
])
AS_IF([test -s "${CONFPATH}/upsmon.conf.sample" && test -z "${nut_inplace_user}"],
[for nut_inplace_user in \
`grep -E '^ *RUN_AS_USER' "${CONFPATH}/upsmon.conf.sample" | awk '{print $2}'`\
`grep -E '^ *##*RUN_AS_USER' "${CONFPATH}/upsmon.conf.sample" | awk '{print $2}'`\
`grep -E '^ *##* *RUN_AS_USER' "${CONFPATH}/upsmon.conf.sample" | awk '{print $3}'`\
; do \
AS_IF([test -z "${nut_inplace_user}"], [
test -n "`${PROBE_OS_USER} "${nut_inplace_user}"`" \
&& AC_MSG_RESULT([Got from ${CONFPATH}/upsmon.conf]) \
|| nut_inplace_user=""])
done
])
dnl Note: with default short inplace and no prefix, this would look under
dnl /usr/local/ups/lib/pkgconfig which may be irrelevant for packaged setups
dnl TODO: Any more reasonable defaults? Pile them on here :)
for F in \
"${PKGCONFDIR}/libupsclient.pc" \
"${PKGCONFDIR}/libnutclient.pc" \
"${LIBDIR}/pkgconfig/libupsclient.pc" \
"${LIBDIR}/pkgconfig/libnutclient.pc" \
; do
AS_IF([test -z "${nut_inplace_user}" && test -s "$F"],
[nut_inplace_user="`grep -E '^ *nutuser=' "$F" | sed 's,^ *nutuser=,,'`" \
&& test -n "`${PROBE_OS_USER} "${nut_inplace_user}"`" \
&& AC_MSG_RESULT([Got from $F]) \
|| nut_inplace_user=""
])
done
AS_IF([test -z "${nut_inplace_user}"],
[AS_IF([test -n "`${PROBE_OS_USER} nut`"], [nut_inplace_user="nut"],
[AS_IF([test -n "`${PROBE_OS_USER} ups`"], [nut_inplace_user="ups"])])])
AS_IF([test -n "${nut_inplace_user}"], [
AC_MSG_RESULT([${nut_inplace_user}])
CONFIG_FLAGS_DEPLOYED="${CONFIG_FLAGS_DEPLOYED} --with-user='${nut_inplace_user}'"
], [
AC_MSG_RESULT([not detected])
])
])
AS_IF([test x"${CONFIG_FLAGS_DEPLOYED}" != x], [
AC_MSG_NOTICE([Detected CONFIG_FLAGS of an already deployed NUT installation, using them for --inplace-runtime configuration (restarting script)])
dnl For multiply-specified flags with conflicting values, last mention wins:
AC_MSG_NOTICE([exec "$0" $CONFIG_FLAGS_DEPLOYED $CONFIG_FLAGS --disable-inplace-runtime])
AS_IF([test x"${NUT_VERSION_DEPLOYED}" != x], [
AC_MSG_NOTICE([NUT_VERSION_DEPLOYED: ${NUT_VERSION_DEPLOYED}])
],[
NUT_VERSION_DEPLOYED="<reenter>"
])
export NUT_VERSION_DEPLOYED
dnl # Avoid replacement after re-entering:
test -n "${CONFIG_CFLAGS-}" || CONFIG_CFLAGS=" "
test -n "${CONFIG_CXXFLAGS-}" || CONFIG_CXXFLAGS=" "
test -n "${CONFIG_CPPFLAGS-}" || CONFIG_CPPFLAGS=" "
test -n "${CONFIG_LDFLAGS-}" || CONFIG_LDFLAGS=" "
export CONFIG_CFLAGS
export CONFIG_CXXFLAGS
export CONFIG_CPPFLAGS
export CONFIG_LDFLAGS
AC_MSG_NOTICE([Moving config.log of the original invocation to config.log.inplace-outer just before exec...])
mv -f config.log config.log.inplace-outer || true
eval exec "$0" $CONFIG_FLAGS_DEPLOYED $CONFIG_FLAGS --disable-inplace-runtime
],[
AC_MSG_NOTICE([No CONFIG_FLAGS were reported or discovered from existing NUT deployment (if any); restarting script for a clean run])
NUT_VERSION_DEPLOYED="<reenter>"
export NUT_VERSION_DEPLOYED
dnl # Avoid replacement after re-entering:
test -n "${CONFIG_CFLAGS-}" || CONFIG_CFLAGS=" "
test -n "${CONFIG_CXXFLAGS-}" || CONFIG_CXXFLAGS=" "
test -n "${CONFIG_CPPFLAGS-}" || CONFIG_CPPFLAGS=" "
test -n "${CONFIG_LDFLAGS-}" || CONFIG_LDFLAGS=" "
export CONFIG_CFLAGS
export CONFIG_CXXFLAGS
export CONFIG_CPPFLAGS
export CONFIG_LDFLAGS
AC_MSG_NOTICE([Moving config.log of the original invocation to config.log.inplace-outer just before exec...])
mv -f config.log config.log.inplace-outer || true
AC_MSG_NOTICE([exec "$0" $CONFIG_FLAGS --disable-inplace-runtime])
eval exec "$0" $CONFIG_FLAGS --disable-inplace-runtime
])
])
dnl Define directory where LIBOBJS replacement functions are
AC_CONFIG_LIBOBJ_DIR([common])
dnl +-------------------------------------------------------------------
AC_PROG_INSTALL
AC_PROG_MKDIR_P
AC_PROG_LN_S
AC_PROG_EGREP
AC_PATH_PROG(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, :)
dnl Postpone call to LT_INIT/AC_CONFIG_FILES to allow disabling static lib
AC_C_BIGENDIAN
AC_C_INLINE
AC_C_FLEXIBLE_ARRAY_MEMBER
AC_C_VARARRAYS
NUT_ARG_ENABLE([keep_nut_report_feature],
[Request that we keep config.nut_report_feature.log (normally deleted by configure script after displaying)],
[no])
AS_IF([test x"${NUT_SOURCE_GITREV}" = x],
[NUT_REPORT([configured version], [${PACKAGE_VERSION}])],
[AS_IF([test x"${NUT_SOURCE_GITREV}" = x"${PACKAGE_VERSION}"],
[NUT_REPORT([configured version], [${PACKAGE_VERSION} ${NUT_SOURCE_GITREV_DEVREL}])],
[NUT_REPORT([configured version], [${PACKAGE_VERSION} (${NUT_SOURCE_GITREV}) ${NUT_SOURCE_GITREV_DEVREL}])])
])
NUT_REPORT([Documentation website base URL], [${NUT_WEBSITE_BASE}])
AC_DEFINE_UNQUOTED([NUT_WEBSITE_BASE], "${NUT_WEBSITE_BASE}", [Documentation website base URL, no trailing slash])
dnl Note: the compiler/pragma/attr methods below are custom for NUT codebase:
NUT_COMPILER_FAMILY
dnl Note: DO NOT AC_DEFINE the "FULL" items: they are generally multi-line.
dnl NUT_REPORT_TARGET([CC_VERSION_FULL], ["${CC_VERSION_FULL}"], [Version and other details of C compiler])
dnl NUT_REPORT_TARGET([CXX_VERSION_FULL], ["${CXX_VERSION_FULL}"], [Version and other details of C++ compiler])
dnl NUT_REPORT_TARGET([CPP_VERSION_FULL], ["${CPP_VERSION_FULL}"], [Version and other details of C preprocessor])
NUT_REPORT_TARGET([CC_VERSION], ["${CC_VERSION}"], [Compact version of C compiler])
NUT_REPORT_TARGET([CXX_VERSION], ["${CXX_VERSION}"], [Compact version of C++ compiler])
NUT_REPORT_TARGET([CPP_VERSION], ["${CPP_VERSION}"], [Compact version of C preprocessor])
dnl Help find warning/error details in a wall of text (must be processed before NUT_COMPILER_FAMILY_FLAGS):
NUT_ARG_ENABLE([Wcolor],
[Request that compiler output is colorized (no = leave it up to compiler defaults)],
[no])
NUT_COMPILER_FAMILY_FLAGS
AX_C_PRAGMAS
AX_C___ATTRIBUTE__
AX_C_PRINTF_STRING_NULL
dnl Check if the system provides a boolean type and how it is spelled
NUT_CHECK_BOOL
dnl All current systems provide time.h; it need not be checked for.
dnl Not all systems provide sys/time.h, but those that do, all allow
dnl you to include it and time.h simultaneously.
dnl NUT codebase provides the include/timehead.h to wrap these nuances.
AC_CHECK_HEADERS_ONCE([sys/time.h time.h sys/types.h])
dnl ###obsolete### AC_HEADER_TIME
AS_IF([test "$ac_cv_header_sys_time_h" = yes],
[AC_DEFINE([TIME_WITH_SYS_TIME],[1],[Define to 1 if you can safely include both <sys/time.h>
and <time.h>. This macro is deemed obsolete by autotools.])
], [])
CODE_TIMEINCL="
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
"
dnl TEMPORARY to allow certain linux-only buildable drivers
AC_CHECK_HEADERS_ONCE([linux/serial.h])
AM_CONDITIONAL(HAVE_LINUX_SERIAL_H, test x"${ac_cv_header_linux_serial_h}" = xyes)
AC_CHECK_HEADERS_ONCE([fcntl.h sys/stat.h sys/socket.h netdb.h])
AC_CHECK_FUNCS(flock lockf fcvt fcvtl dup dup2 abs_val abs)
AC_CHECK_HEADER([float.h],
[AC_DEFINE([HAVE_FLOAT_H], [1],
[Define to 1 if you have <float.h>.])])
AC_CHECK_HEADER([math.h],
[AC_DEFINE([HAVE_MATH_H], [1],
[Define to 1 if you have <math.h>.])])
AC_CHECK_DECLS([fabs, fabsf, fabsl, pow10, round], [], [],
[#ifdef HAVE_MATH_H
# include <math.h>
#endif
#ifdef HAVE_FLOAT_H
# include <float.h>
#endif
])
AC_CHECK_HEADER([limits.h],
[AC_DEFINE([HAVE_LIMITS_H], [1],
[Define to 1 if you have <limits.h>.])])
AC_CHECK_HEADER([stdlib.h],
[AC_DEFINE([HAVE_STDLIB_H], [1],
[Define to 1 if you have <stdlib.h>.])])
AC_CHECK_DECLS(realpath, [], [],
[#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
])
AC_CHECK_HEADER([signal.h],
[AC_DEFINE([HAVE_SIGNAL_H], [1],
[Define to 1 if you have <signal.h>.])])
AC_CHECK_HEADER([sys/signal.h],
[AC_DEFINE([HAVE_SYS_SIGNAL_H], [1],
[Define to 1 if you have <sys/signal.h>.])])
AC_CHECK_HEADER([sys/resource.h],
[AC_MSG_CHECKING([for struct rlimit and getrlimit()])
AC_LANG_PUSH([C])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#include <sys/resource.h>
],
[struct rlimit limit;
getrlimit(RLIMIT_NOFILE, &limit);
/* Do not care about actual return value in this test,
* normally check for non-zero meaning to look in errno */
]
)],
[AC_DEFINE([HAVE_SYS_RESOURCE_H], [1],
[Define to 1 if you have <sys/resource.h> with usable struct rlimit and getrlimit().])
AC_MSG_RESULT([ok])
],
[AC_MSG_RESULT([no])]
)
AC_LANG_POP([C])
]
)
AC_CHECK_HEADER([poll.h],
[AC_DEFINE([HAVE_POLL_H], [1],
[Define to 1 if you have <poll.h>.])])
SEMLIBS=""
AC_CHECK_HEADER([semaphore.h],
[AC_DEFINE([HAVE_SEMAPHORE_H], [1],
[Define to 1 if you have <sys/semaphore.h>.])
AC_LANG_PUSH([C])
myLIBS="${LIBS}"
LIBS=""
SEMLIBS_LRT=""
dnl Solaris 8 builds complain about indirect dependency involved:
dnl sem_init nut_scanner-nut-scanner.o
dnl (symbol belongs to implicit dependency /usr/lib/librt.so.1)
AC_SEARCH_LIBS([sem_init], [pthread], [], [
unset ac_cv_search_sem_init
AC_SEARCH_LIBS([sem_init], [pthread], [SEMLIBS_LRT=" -lrt"], [], [-lrt])])
AC_SEARCH_LIBS([sem_open], [pthread], [], [
unset ac_cv_search_sem_open
AC_SEARCH_LIBS([sem_open], [pthread], [SEMLIBS_LRT=" -lrt"], [], [-lrt])])
AS_CASE([${ac_cv_search_sem_init}], [no*], [], [SEMLIBS="${ac_cv_search_sem_init}"])
AS_CASE([${ac_cv_search_sem_open}], [no*], [], ["${SEMLIBS}"], [], [SEMLIBS="${ac_cv_search_sem_open}"])
SEMLIBS="${SEMLIBS}${SEMLIBS_LRT}"
LIBS="${SEMLIBS}"
AC_MSG_CHECKING([for sem_t, sem_init() and sem_destroy()])
AX_RUN_OR_LINK_IFELSE([AC_LANG_PROGRAM([
#include <semaphore.h>
],
[sem_t semaphore;
sem_init(&semaphore, 0, 4);
sem_destroy(&semaphore);
/* Do not care about actual return value in this test,
* normally check for non-zero meaning to look in errno */
]
)],
[AC_DEFINE([HAVE_SEMAPHORE_UNNAMED], [1],
[Define to 1 if you have <sys/semaphore.h> with usable sem_t, sem_init() and sem_destroy() for unnamed semaphores.])
AC_MSG_RESULT([ok])
],
[AC_MSG_RESULT([no])]
)
AC_MSG_CHECKING([for sem_t, sem_open() and sem_close()])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#include <semaphore.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h> /* For O_* constants */
#endif