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libzmq/acinclude.m4
E. G. Patrick Bos 36e4c9b474
add zmq_ppoll 
zmq_ppoll mostly mimics zmq_poll behavior, except for the added feature of being able to specify a signal mask. Signals in this mask will be blocked during execution of zmq_ppoll. Switching of the process' active signal mask happens atomically with the actual poll call, so that no race conditions can occur. This behavior is useful when one wants to gracefully handle POSIX signals without race conditions. See e.g. the discussion below https://250bpm.com/blog:12/ for an explanation.

Also includes two new tests:
1. test_zmq_ppoll_fd does the same thing as test_zmq_poll_fd, demonstrating backwards compatibility with zmq_poll when used with a default signal mask.
2. test_zmq_ppoll_signals demonstrates the use of zmq_ppoll with a signal mask, blocking out SIGTERM everywhere except in zmq_ppoll, allowing to handle the signal in one place without having to worry about race conditions.
2021-09-24 11:04:20 +02:00

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dnl ##############################################################################
dnl # LIBZMQ_CONFIG_LIBTOOL #
dnl # Configure libtool. Requires AC_CANONICAL_HOST #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CONFIG_LIBTOOL], [{
AC_REQUIRE([AC_CANONICAL_HOST])
# Libtool configuration for different targets
case "${host_os}" in
*mingw*|*cygwin*|*msys*)
# Disable static build by default
AC_DISABLE_STATIC
;;
*)
# Everything else with static enabled
AC_ENABLE_STATIC
;;
esac
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_LANG_ICC([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using ICC #
dnl # Adapted from http://software.intel.com/en-us/forums/showthread.php?t=67984 #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_ICC],
[AC_CACHE_CHECK([whether we are using Intel _AC_LANG compiler],
[libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#ifndef __INTEL_COMPILER
error if not ICC
#endif
]])],
[libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler="yes" ; $1],
[libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_LANG_SUN_STUDIO([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using Sun Studio #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_SUN_STUDIO],
[AC_CACHE_CHECK([whether we are using Sun Studio _AC_LANG compiler],
[libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#if !defined(__SUNPRO_CC) && !defined(__SUNPRO_C)
error if not sun studio
#endif
]])],
[libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler="yes" ; $1],
[libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_LANG_CLANG([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using clang #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_CLANG],
[AC_CACHE_CHECK([whether we are using clang _AC_LANG compiler],
[libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#ifndef __clang__
error if not clang
#endif
]])],
[libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler="yes" ; $1],
[libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_LANG_GCC4([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using clang #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_GCC4],
[AC_CACHE_CHECK([whether we are using gcc >= 4 _AC_LANG compiler],
[libzmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#if (!defined __GNUC__ || __GNUC__ < 4)
error if not gcc4 or higher
#endif
]])],
[libzmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler="yes" ; $1],
[libzmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_DOC_BUILD #
dnl # Check whether to build documentation and install man-pages #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_DOC_BUILD], [{
# Man pages are built/installed if asciidoc and xmlto are present
# --with-docs=no overrides this
AC_ARG_WITH([docs],
AS_HELP_STRING([--without-docs],
[Don't build and install man pages [default=build]]),
[with_docs=$withval])
AC_ARG_WITH([documentation], [AS_HELP_STRING([--without-documentation],
[Don't build and install man pages [default=build] DEPRECATED: use --without-docs])])
if test "x$with_documentation" = "xno"; then
AC_MSG_WARN([--without-documentation is DEPRECATED and will be removed in the next release, use --without-docs])
fi
if test "x$with_docs" = "xno" || test "x$with_documentation" = "xno"; then
libzmq_build_doc="no"
libzmq_install_man="no"
else
# Determine whether or not documentation should be built and installed.
libzmq_build_doc="yes"
libzmq_install_man="yes"
# Check for asciidoc and xmlto and don't build the docs if these are not installed.
AC_CHECK_PROG(libzmq_have_asciidoc, asciidoc, yes, no)
AC_CHECK_PROG(libzmq_have_xmlto, xmlto, yes, no)
if test "x$libzmq_have_asciidoc" = "xno" -o "x$libzmq_have_xmlto" = "xno"; then
libzmq_build_doc="no"
# Tarballs built with 'make dist' ship with prebuilt documentation.
if ! test -f doc/zmq.7; then
libzmq_install_man="no"
AC_MSG_WARN([You are building an unreleased version of 0MQ and asciidoc or xmlto are not installed.])
AC_MSG_WARN([Documentation will not be built and manual pages will not be installed.])
fi
fi
# Do not install man pages if on mingw
if test "x$libzmq_on_mingw" = "xyes"; then
libzmq_install_man="no"
fi
fi
AC_MSG_CHECKING([whether to build documentation])
AC_MSG_RESULT([$libzmq_build_doc])
AC_MSG_CHECKING([whether to install manpages])
AC_MSG_RESULT([$libzmq_install_man])
AM_CONDITIONAL(BUILD_DOC, test "x$libzmq_build_doc" = "xyes")
AM_CONDITIONAL(INSTALL_MAN, test "x$libzmq_install_man" = "xyes")
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_LANG_COMPILER([action-if-found], [action-if-not-found]) #
dnl # Check that compiler for the current language actually works #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_COMPILER], [{
# Test that compiler for the current language actually works
AC_CACHE_CHECK([whether the _AC_LANG compiler works],
[libzmq_cv_[]_AC_LANG_ABBREV[]_compiler_works],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
[libzmq_cv_[]_AC_LANG_ABBREV[]_compiler_works="yes" ; $1],
[libzmq_cv_[]_AC_LANG_ABBREV[]_compiler_works="no" ; $2])
])
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_compiler_works" != "xyes"; then
AC_MSG_ERROR([Unable to find a working _AC_LANG compiler])
fi
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_COMPILERS #
dnl # Check compiler characteristics. This is so that we can AC_REQUIRE checks #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_COMPILERS], [{
# For that the compiler works and try to come up with the type
AC_LANG_PUSH([C])
LIBZMQ_CHECK_LANG_COMPILER
LIBZMQ_CHECK_LANG_ICC
LIBZMQ_CHECK_LANG_SUN_STUDIO
LIBZMQ_CHECK_LANG_CLANG
LIBZMQ_CHECK_LANG_GCC4
AC_LANG_POP([C])
AC_LANG_PUSH(C++)
LIBZMQ_CHECK_LANG_COMPILER
LIBZMQ_CHECK_LANG_ICC
LIBZMQ_CHECK_LANG_SUN_STUDIO
LIBZMQ_CHECK_LANG_CLANG
LIBZMQ_CHECK_LANG_GCC4
AC_LANG_POP([C++])
# Set GCC and GXX variables correctly
if test "x$GCC" = "xyes"; then
if test "xyes" = "x$libzmq_cv_c_intel_compiler"; then
GCC="no"
fi
fi
if test "x$GXX" = "xyes"; then
if test "xyes" = "x$libzmq_cv_cxx_intel_compiler"; then
GXX="no"
fi
fi
}])
dnl ############################################################################
dnl # LIBZMQ_CHECK_LANG_FLAG([flag], [action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports given flag. Works for C and C++ #
dnl # Sets libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_[FLAG]=yes/no #
dnl ############################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_FLAG], [{
AC_REQUIRE([AC_PROG_GREP])
AC_MSG_CHECKING([whether _AC_LANG compiler supports $1])
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save=$ac_[]_AC_LANG_ABBREV[]_werror_flag
ac_[]_AC_LANG_ABBREV[]_werror_flag="yes"
case "x[]_AC_LANG_ABBREV" in
xc)
libzmq_cv_check_lang_flag_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
;;
xcxx)
libzmq_cv_check_lang_flag_save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $1"
;;
*)
AC_MSG_WARN([testing compiler characteristic on an unknown language])
;;
esac
AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
# This hack exist for ICC, which outputs unknown options as remarks
# Remarks are not turned into errors even with -Werror on
[if ($GREP 'ignoring unknown' conftest.err ||
$GREP 'not supported' conftest.err) >/dev/null 2>&1; then
eval AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="no"
else
eval AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="yes"
fi],
[eval AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="no"])
case "x[]_AC_LANG_ABBREV" in
xc)
CFLAGS="$libzmq_cv_check_lang_flag_save_CFLAGS"
;;
xcxx)
CPPFLAGS="$libzmq_cv_check_lang_flag_save_CPPFLAGS"
;;
*)
# nothing to restore
;;
esac
# Restore the werror flag
ac_[]_AC_LANG_ABBREV[]_werror_flag=$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save
# Call the action as the flags are restored
AS_IF([eval test x$]AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[AC_MSG_RESULT(yes) ; $2], [AC_MSG_RESULT(no) ; $3])
}])
dnl ####################################################################################
dnl # LIBZMQ_CHECK_LANG_FLAG_PREPEND([flag], [action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports given flag. Works for C and C++ #
dnl # This macro prepends the flag to CFLAGS or CPPFLAGS accordingly #
dnl # Sets libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_[FLAG]=yes/no #
dnl ####################################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_FLAG_PREPEND], [{
LIBZMQ_CHECK_LANG_FLAG([$1])
case "x[]_AC_LANG_ABBREV" in
xc)
AS_IF([eval test x$]AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[CFLAGS="$1 $CFLAGS"; $2], $3)
;;
xcxx)
AS_IF([eval test x$]AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[CPPFLAGS="$1 $CPPFLAGS"; $2], $3)
;;
esac
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_ENABLE_DEBUG([action-if-found], [action-if-not-found]) #
dnl # Check whether to enable debug build and set compiler flags accordingly #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_ENABLE_DEBUG], [{
# Require compiler specifics
AC_REQUIRE([LIBZMQ_CHECK_COMPILERS])
# This flag is checked also in
AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug],
[enable debugging information [default=disabled]])])
AC_MSG_CHECKING(whether to enable debugging information)
if test "x$enable_debug" = "xyes"; then
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o \
"x$libzmq_cv_c_intel_compiler" = "xyes" -o \
"x$libzmq_cv_c_clang_compiler" = "xyes"; then
CFLAGS="-g -O0 "
elif test "x$libzmq_cv_c_sun_studio_compiler" = "xyes"; then
CFLAGS="-g0 "
fi
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o \
"x$libzmq_cv_cxx_intel_compiler" = "xyes" -o \
"x$libzmq_cv_cxx_clang_compiler" = "xyes"; then
CPPFLAGS="-g -O0 "
CXXFLAGS="-g -O0 "
# Sun studio
elif test "x$libzmq_cv_cxx_sun_studio_compiler" = "xyes"; then
CPPFLAGS="-g0 "
CXXFLAGS="-g0 "
fi
if test "x$ZMQ_ORIG_CFLAGS" != "xnone"; then
CFLAGS="${CFLAGS} ${ZMQ_ORIG_CFLAGS}"
fi
if test "x$ZMQ_ORIG_CPPFLAGS" != "xnone"; then
CPPFLAGS="${CPPFLAGS} ${ZMQ_ORIG_CPPFLAGS}"
fi
if test "x$ZMQ_ORIG_CXXFLAGS" != "xnone"; then
CXXFLAGS="${CXXFLAGS} ${ZMQ_ORIG_CXXFLAGS}"
fi
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
}])
dnl ##############################################################################
dnl # LIBZMQ_WITH_GCOV([action-if-found], [action-if-not-found]) #
dnl # Check whether to build with code coverage #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_WITH_GCOV], [{
# Require compiler specifics
AC_REQUIRE([LIBZMQ_CHECK_COMPILERS])
AC_ARG_WITH(gcov, [AS_HELP_STRING([--with-gcov=yes/no],
[with GCC Code Coverage reporting.])],
[ZMQ_GCOV="$withval"])
AC_MSG_CHECKING(whether to enable code coverage)
if test "x$ZMQ_GCOV" = "xyes"; then
if test "x$GXX" != "xyes"; then
AC_MSG_ERROR([--with-gcov=yes works only with GCC])
fi
CFLAGS="-g -O0 -fprofile-arcs -ftest-coverage"
if test "x${ZMQ_ORIG_CPPFLAGS}" != "xnone"; then
CFLAGS="${CFLAGS} ${ZMQ_ORIG_CFLAGS}"
fi
CPPFLAGS="-g -O0 -fprofile-arcs -ftest-coverage"
if test "x${ZMQ_ORIG_CPPFLAGS}" != "xnone"; then
CPPFLAGS="${CPPFLAGS} ${ZMQ_ORIG_CPPFLAGS}"
fi
CXXFLAGS="-fprofile-arcs"
if test "x${ZMQ_ORIG_CXXFLAGS}" != "xnone"; then
CXXFLAGS="${CXXFLAGS} ${ZMQ_ORIG_CXXFLAGS}"
fi
LIBS="-lgcov ${LIBS}"
fi
AS_IF([test "x$ZMQ_GCOV" = "xyes"],
[AC_MSG_RESULT(yes) ; $1], [AC_MSG_RESULT(no) ; $2])
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_WITH_FLAG([flags], [macro]) #
dnl # Runs a normal autoconf check with compiler flags #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_WITH_FLAG], [{
libzmq_check_with_flag_save_CFLAGS="$CFLAGS"
libzmq_check_with_flag_save_CPPFLAGS="$CPPFLAGS"
CFLAGS="$CFLAGS $1"
CPPFLAGS="$CPPFLAGS $1"
# Execute the macro
$2
CFLAGS="$libzmq_check_with_flag_save_CFLAGS"
CPPFLAGS="$libzmq_check_with_flag_save_CPPFLAGS"
}])
dnl ##############################################################################
dnl # LIBZMQ_LANG_WALL([action-if-found], [action-if-not-found]) #
dnl # How to define -Wall for the current compiler #
dnl # Sets libzmq_cv_[]_AC_LANG_ABBREV[]__wall_flag variable to found style #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_LANG_WALL], [{
AC_MSG_CHECKING([how to enable additional warnings for _AC_LANG compiler])
libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-Wall"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-v"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-Wall"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="+w"
fi
;;
*)
;;
esac
# Call the action
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag" != "x"; then
AC_MSG_RESULT([$libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ####################################################################
dnl # LIBZMQ_LANG_STRICT([action-if-found], [action-if-not-found]) #
dnl # Check how to turn on strict standards compliance #
dnl ####################################################################
AC_DEFUN([LIBZMQ_LANG_STRICT], [{
AC_MSG_CHECKING([how to enable strict standards compliance in _AC_LANG compiler])
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o "x$libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-pedantic"
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-strict-ansi"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-Xc"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o "x$libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-pedantic"
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-strict-ansi"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-compat=5"
fi
;;
*)
;;
esac
# Call the action
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag" != "x"; then
AC_MSG_RESULT([$libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ########################################################################
dnl # LIBZMQ_LANG_WERROR([action-if-found], [action-if-not-found]) #
dnl # Check how to turn warnings to errors #
dnl ########################################################################
AC_DEFUN([LIBZMQ_LANG_WERROR], [{
AC_MSG_CHECKING([how to turn warnings to errors in _AC_LANG compiler])
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-Werror"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-errwarn=%all"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-Werror"
# Sun studio
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-errwarn=%all"
fi
;;
*)
;;
esac
# Call the action
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag" != "x"; then
AC_MSG_RESULT([$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_LANG_PRAGMA([pragma], [action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports given pragma #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_PRAGMA], [{
# Need to know how to enable all warnings
LIBZMQ_LANG_WALL
AC_MSG_CHECKING([whether _AC_LANG compiler supports pragma $1])
# Save flags
libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save=$ac_[]_AC_LANG_ABBREV[]_werror_flag
ac_[]_AC_LANG_ABBREV[]_werror_flag="yes"
if test "x[]_AC_LANG_ABBREV" = "xc"; then
libzmq_cv_check_lang_pragma_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag"
elif test "x[]_AC_LANG_ABBREV" = "xcxx"; then
libzmq_cv_check_lang_pragma_save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag"
else
AC_MSG_WARN([testing compiler characteristic on an unknown language])
fi
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#pragma $1]])],
[eval AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)="yes" ; AC_MSG_RESULT(yes)],
[eval AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)="no" ; AC_MSG_RESULT(no)])
if test "x[]_AC_LANG_ABBREV" = "xc"; then
CFLAGS="$libzmq_cv_check_lang_pragma_save_CFLAGS"
elif test "x[]_AC_LANG_ABBREV" = "xcxx"; then
CPPFLAGS="$libzmq_cv_check_lang_pragma_save_CPPFLAGS"
fi
ac_[]_AC_LANG_ABBREV[]_werror_flag=$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save
# Call the action as the flags are restored
AS_IF([eval test x$]AS_TR_SH(libzmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)[ = "xyes"],
[$2], [$3])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_LANG_VISIBILITY([action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports dso visibility #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_LANG_VISIBILITY], [{
libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag=""
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes" -o \
"x$libzmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler" = "xyes"; then
LIBZMQ_CHECK_LANG_FLAG([-fvisibility=hidden],
[libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag="-fvisibility=hidden"])
elif test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
LIBZMQ_CHECK_LANG_FLAG([-xldscope=hidden],
[libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag="-xldscope=hidden"])
fi
AC_MSG_CHECKING(whether _AC_LANG compiler supports dso visibility)
AS_IF([test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag" != "x"],
[AC_MSG_RESULT(yes) ; $1], [AC_MSG_RESULT(no) ; $2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_SOCK_CLOEXEC([action-if-found], [action-if-not-found]) #
dnl # Check if SOCK_CLOEXEC is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_SOCK_CLOEXEC], [{
AC_CACHE_CHECK([whether SOCK_CLOEXEC is supported], [libzmq_cv_sock_cloexec],
[AC_TRY_RUN([/* SOCK_CLOEXEC test */
#include <sys/types.h>
#include <sys/socket.h>
int main (int argc, char *argv [])
{
int s = socket (PF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
return (s == -1);
}
],
[libzmq_cv_sock_cloexec="yes"],
[libzmq_cv_sock_cloexec="no"],
[libzmq_cv_sock_cloexec="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_sock_cloexec" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_O_CLOEXEC([action-if-found], [action-if-not-found]) #
dnl # Check if O_CLOEXEC is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_O_CLOEXEC], [{
AC_CACHE_CHECK([whether O_CLOEXEC is supported], [libzmq_cv_o_cloexec],
[AC_TRY_RUN([/* O_CLOEXEC test */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main (int argc, char *argv [])
{
int s = open ("/dev/null", O_CLOEXEC | O_RDONLY);
return (s == -1);
}
],
[libzmq_cv_o_cloexec="yes"],
[libzmq_cv_o_cloexec="no"],
[libzmq_cv_o_cloexec="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_o_cloexec" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_EVENTFD_CLOEXEC([action-if-found], [action-if-not-found]) #
dnl # Check if EFD_CLOEXEC is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_EVENTFD_CLOEXEC], [{
AC_CACHE_CHECK([whether EFD_CLOEXEC is supported], [libzmq_cv_efd_cloexec],
[AC_TRY_RUN([/* EFD_CLOEXEC test */
#include <sys/eventfd.h>
int main (int argc, char *argv [])
{
int s = eventfd (0, EFD_CLOEXEC);
return (s == -1);
}
],
[libzmq_cv_efd_cloexec="yes"],
[libzmq_cv_efd_cloexec="no"],
[libzmq_cv_efd_cloexec="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_efd_cloexec" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_ATOMIC_INSTRINSICS([action-if-found], [action-if-not-found]) #
dnl # Check if compiler supoorts __atomic_Xxx intrinsics #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_ATOMIC_INTRINSICS], [{
AC_MSG_CHECKING(whether compiler supports __atomic_Xxx intrinsics)
AC_LINK_IFELSE([AC_LANG_SOURCE([
/* atomic intrinsics test */
int v = 0;
int main (int, char **)
{
int t = __atomic_add_fetch (&v, 1, __ATOMIC_ACQ_REL);
return t;
}
])],
[AC_MSG_RESULT(yes) ; GCC_ATOMIC_BUILTINS_SUPPORTED=1 libzmq_cv_has_atomic_instrisics="yes" ; $1])
if test "x$GCC_ATOMIC_BUILTINS_SUPPORTED" != x1; then
save_LIBS=$LIBS
LIBS="$LIBS -latomic"
AC_LINK_IFELSE([AC_LANG_SOURCE([
/* atomic intrinsics test */
int v = 0;
int main (int, char **)
{
int t = __atomic_add_fetch (&v, 1, __ATOMIC_ACQ_REL);
return t;
}
])],
[AC_MSG_RESULT(yes) ; libzmq_cv_has_atomic_instrisics="yes" PKGCFG_LIBS_PRIVATE="$PKGCFG_LIBS_PRIVATE -latomic" ; $1],
[AC_MSG_RESULT(no) ; libzmq_cv_has_atomic_instrisics="no" LIBS=$save_LIBS ; $2])
fi
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_SO_BINDTODEVICE([action-if-found], [action-if-not-found]) #
dnl # Check if SO_BINDTODEVICE is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_SO_BINDTODEVICE], [{
AC_CACHE_CHECK([whether SO_BINDTODEVICE is supported], [libzmq_cv_so_bindtodevice],
[AC_TRY_RUN([/* SO_BINDTODEVICE test */
#include <sys/socket.h>
int main (int argc, char *argv [])
{
/* Actually making the setsockopt() call requires CAP_NET_RAW */
#ifndef SO_BINDTODEVICE
return 1;
#else
return 0;
#endif
}
],
[libzmq_cv_so_bindtodevice="yes"],
[libzmq_cv_so_bindtodevice="no"],
[libzmq_cv_so_bindtodevice="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_so_bindtodevice" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_SO_KEEPALIVE([action-if-found], [action-if-not-found]) #
dnl # Check if SO_KEEPALIVE is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_SO_KEEPALIVE], [{
AC_CACHE_CHECK([whether SO_KEEPALIVE is supported], [libzmq_cv_so_keepalive],
[AC_TRY_RUN([/* SO_KEEPALIVE test */
#include <sys/types.h>
#include <sys/socket.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_KEEPALIVE, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_so_keepalive="yes"],
[libzmq_cv_so_keepalive="no"],
[libzmq_cv_so_keepalive="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_so_keepalive" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_TCP_KEEPCNT([action-if-found], [action-if-not-found]) #
dnl # Check if TCP_KEEPCNT is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_TCP_KEEPCNT], [{
AC_CACHE_CHECK([whether TCP_KEEPCNT is supported], [libzmq_cv_tcp_keepcnt],
[AC_TRY_RUN([/* TCP_KEEPCNT test */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_KEEPALIVE, (char*) &opt, sizeof (int))) == -1) ||
((rc = setsockopt (s, IPPROTO_TCP, TCP_KEEPCNT, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_tcp_keepcnt="yes"],
[libzmq_cv_tcp_keepcnt="no"],
[libzmq_cv_tcp_keepcnt="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_tcp_keepcnt" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_TCP_KEEPIDLE([action-if-found], [action-if-not-found]) #
dnl # Check if TCP_KEEPIDLE is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_TCP_KEEPIDLE], [{
AC_CACHE_CHECK([whether TCP_KEEPIDLE is supported], [libzmq_cv_tcp_keepidle],
[AC_TRY_RUN([/* TCP_KEEPIDLE test */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_KEEPALIVE, (char*) &opt, sizeof (int))) == -1) ||
((rc = setsockopt (s, IPPROTO_TCP, TCP_KEEPIDLE, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_tcp_keepidle="yes"],
[libzmq_cv_tcp_keepidle="no"],
[libzmq_cv_tcp_keepidle="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_tcp_keepidle" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_TCP_KEEPINTVL([action-if-found], [action-if-not-found]) #
dnl # Check if TCP_KEEPINTVL is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_TCP_KEEPINTVL], [{
AC_CACHE_CHECK([whether TCP_KEEPINTVL is supported], [libzmq_cv_tcp_keepintvl],
[AC_TRY_RUN([/* TCP_KEEPINTVL test */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_KEEPALIVE, (char*) &opt, sizeof (int))) == -1) ||
((rc = setsockopt (s, IPPROTO_TCP, TCP_KEEPINTVL, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_tcp_keepintvl="yes"],
[libzmq_cv_tcp_keepintvl="no"],
[libzmq_cv_tcp_keepintvl="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_tcp_keepintvl" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_TCP_KEEPALIVE([action-if-found], [action-if-not-found]) #
dnl # Check if TCP_KEEPALIVE is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_TCP_KEEPALIVE], [{
AC_CACHE_CHECK([whether TCP_KEEPALIVE is supported], [libzmq_cv_tcp_keepalive],
[AC_TRY_RUN([/* TCP_KEEPALIVE test */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_KEEPALIVE, (char*) &opt, sizeof (int))) == -1) ||
((rc = setsockopt (s, IPPROTO_TCP, TCP_KEEPALIVE, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_tcp_keepalive="yes"],
[libzmq_cv_tcp_keepalive="no"],
[libzmq_cv_tcp_keepalive="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_tcp_keepalive" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_SO_PRIORITY([action-if-found], [action-if-not-found]) #
dnl # Check if SO_PRIORITY is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_SO_PRIORITY], [{
AC_CACHE_CHECK([whether SO_PRIORITY is supported], [libzmq_cv_so_priority],
[AC_TRY_RUN([/* SO_PRIORITY test */
#include <sys/types.h>
#include <sys/socket.h>
int main (int argc, char *argv [])
{
int s, rc, opt = 1;
return (
((s = socket (PF_INET, SOCK_STREAM, 0)) == -1) ||
((rc = setsockopt (s, SOL_SOCKET, SO_PRIORITY, (char*) &opt, sizeof (int))) == -1)
);
}
],
[libzmq_cv_so_priority="yes"],
[libzmq_cv_so_priority="no"],
[libzmq_cv_so_priority="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_so_priority" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_GETRANDOM([action-if-found], [action-if-not-found]) #
dnl # Checks if getrandom is supported #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_GETRANDOM], [{
AC_CACHE_CHECK([whether getrandom is supported], [libzmq_cv_getrandom],
[AC_TRY_RUN([/* thread-local storage test */
#include <sys/random.h>
int main (int argc, char *argv [])
{
char buf[4];
int rc = getrandom(buf, 4, 0);
return rc == -1 ? 1 : 0;
}
],
[libzmq_cv_getrandom="yes"],
[libzmq_cv_getrandom="no"],
[libzmq_cv_getrandom="not during cross-compile"]
)]
)
AS_IF([test "x$libzmq_cv_getrandom" = "xyes"], [$1], [$2])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_KQUEUE([action-if-found], [action-if-not-found]) #
dnl # Checks kqueue polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_KQUEUE], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
],[[
struct kevent t_kev;
kqueue();
]])],
[$1], [$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_EPOLL_RUN([action-if-found], [action-if-not-found]) #
dnl # LIBZMQ_CHECK_POLLER_EPOLL_CLOEXEC([action-if-found], [action-if-not-found]) #
dnl # Checks epoll polling system can actually run #
dnl # For cross-compile, only requires that epoll can link #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_EPOLL], [{
AC_RUN_IFELSE([
AC_LANG_PROGRAM([
#include <sys/epoll.h>
],[[
struct epoll_event t_ev;
int r;
r = epoll_create(10);
return(r < 0);
]])],
[$1],[$2],[
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/epoll.h>
],[[
struct epoll_event t_ev;
epoll_create(10);
]])],
[$1], [$2]
)
]
)
}])
AC_DEFUN([LIBZMQ_CHECK_POLLER_EPOLL_CLOEXEC], [{
AC_RUN_IFELSE([
AC_LANG_PROGRAM([
#include <sys/epoll.h>
],[[
struct epoll_event t_ev;
int r;
r = epoll_create1(EPOLL_CLOEXEC);
return(r < 0);
]])],
[$1],[$2],[
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/epoll.h>
],[[
struct epoll_event t_ev;
epoll_create1(EPOLL_CLOEXEC);
]])],
[$1], [$2]
)
]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_DEVPOLL([action-if-found], [action-if-not-found]) #
dnl # Checks devpoll polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_DEVPOLL], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/devpoll.h>
],[[
struct pollfd t_devpoll;
int fd = open("/dev/poll", O_RDWR);
]])],
[$1], [$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_POLLSET([action-if-found], [action-if-not-found]) #
dnl # Checks pollset polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_POLLSET], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/poll.h>
#include <sys/pollset.h>
],[[
pollset_t ps = pollset_create(-1);
]])],
[$1], [$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_POLL([action-if-found], [action-if-not-found]) #
dnl # Checks poll polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_POLL], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <poll.h>
],[[
struct pollfd t_poll;
poll(&t_poll, 1, 1);
]])],
[$1], [$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER_SELECT([action-if-found], [action-if-not-found]) #
dnl # Checks select polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER_SELECT], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#ifdef ZMQ_HAVE_WINDOWS
#include "winsock2.h"
#elif defined ZMQ_HAVE_OPENVMS
#include <sys/types.h>
#include <sys/time.h>
#else
#include <sys/select.h>
#endif
],[[
fd_set t_rfds;
struct timeval tv;
FD_ZERO(&t_rfds);
FD_SET(0, &t_rfds);
tv.tv_sec = 5;
tv.tv_usec = 0;
select(1, &t_rfds, 0, 0, &tv);
]])],
[$1],[$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_PSELECT([action-if-found], [action-if-not-found]) #
dnl # Checks pselect polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_PSELECT], [{
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <sys/select.h>
#include <signal.h>
],[[
fd_set t_rfds;
struct timespec ts;
FD_ZERO(&t_rfds);
FD_SET(0, &t_rfds);
ts.tv_sec = 5;
ts.tv_nsec = 0;
sigset_t sigmask, sigmask_without_sigterm;
sigemptyset(&sigmask);
sigprocmask(SIG_BLOCK, &sigmask, &sigmask_without_sigterm);
pselect(1, &t_rfds, 0, 0, &ts, &sigmask);
]])],
[$1],[$2]
)
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_POLLER([action-if-found], [action-if-not-found]) #
dnl # Choose polling system #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_POLLER], [{
# Allow user to override poller autodetection
AC_ARG_WITH([poller],
[AS_HELP_STRING([--with-poller],
[choose I/O thread polling system manually. Valid values are 'kqueue', 'epoll', 'devpoll', 'pollset', 'poll', 'select', 'wepoll', or 'auto'. [default=auto]])])
# Allow user to override poller autodetection
AC_ARG_WITH([api_poller],
[AS_HELP_STRING([--with-api-poller],
[choose zmq_poll(er)_* API polling system manually. Valid values are 'poll', 'select', or 'auto'. [default=auto]])])
if test "x$with_poller" = "x"; then
pollers=auto
else
pollers=$with_poller
fi
if test "$pollers" = "auto"; then
# We search for pollers in this order
pollers="kqueue epoll devpoll pollset poll select"
fi
# try to find suitable polling system. the order of testing is:
AC_MSG_NOTICE([Choosing I/O thread polling system from '$pollers'...])
poller_found=0
for poller in $pollers; do
case "$poller" in
kqueue)
LIBZMQ_CHECK_POLLER_KQUEUE([
AC_MSG_NOTICE([Using 'kqueue' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_KQUEUE, 1, [Use 'kqueue' I/O thread polling system])
poller_found=1
])
;;
epoll)
case "$host_os" in
solaris*|sunos*)
# Recent illumos and Solaris systems did add epoll()
# syntax, but it does not fully satisfy expectations
# that ZMQ has from Linux systems. Unless you undertake
# to fix the integration, do not disable this exception
# and use select() or poll() on Solarish OSes for now.
AC_MSG_NOTICE([NOT using 'epoll' I/O thread polling system on '$host_os']) ;;
*)
LIBZMQ_CHECK_POLLER_EPOLL_CLOEXEC([
AC_MSG_NOTICE([Using 'epoll' I/O thread polling system with CLOEXEC])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_EPOLL, 1, [Use 'epoll' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_EPOLL_CLOEXEC, 1, [Use 'epoll' I/O thread polling system with CLOEXEC])
poller_found=1
],[
LIBZMQ_CHECK_POLLER_EPOLL([
AC_MSG_NOTICE([Using 'epoll' I/O thread polling system with CLOEXEC])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_EPOLL, 1, [Use 'epoll' I/O thread polling system])
poller_found=1
])
])
;;
esac
;;
devpoll)
LIBZMQ_CHECK_POLLER_DEVPOLL([
AC_MSG_NOTICE([Using 'devpoll' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_DEVPOLL, 1, [Use 'devpoll' I/O thread polling system])
poller_found=1
])
;;
pollset)
LIBZMQ_CHECK_POLLER_POLLSET([
AC_MSG_NOTICE([Using 'pollset' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_POLLSET, 1, [Use 'pollset' I/O thread polling system])
poller_found=1
])
;;
poll)
LIBZMQ_CHECK_POLLER_POLL([
AC_MSG_NOTICE([Using 'poll' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_POLL, 1, [Use 'poll' I/O thread polling system])
poller_found=1
])
;;
select)
LIBZMQ_CHECK_POLLER_SELECT([
AC_MSG_NOTICE([Using 'select' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_SELECT, 1, [Use 'select' I/O thread polling system])
poller_found=1
])
;;
wepoll)
# wepoll can only be manually selected
AC_MSG_NOTICE([Using 'wepoll' I/O thread polling system])
AC_DEFINE(ZMQ_IOTHREAD_POLLER_USE_EPOLL, 1, [Use 'epoll' I/O thread polling system])
poller_found=1
;;
esac
test $poller_found -eq 1 && break
done
if test $poller_found -eq 0; then
AC_MSG_ERROR([None of '$pollers' are valid pollers on this platform])
fi
if test "x$with_api_poller" = "x"; then
with_api_poller=auto
fi
if test "x$with_api_poller" = "xauto"; then
if test $poller = "select"; then
api_poller=select
elif test $poller = "wepoll"; then
api_poller=select
else
api_poller=poll
fi
else
api_poller=$with_api_poller
fi
if test "$api_poller" = "select"; then
AC_MSG_NOTICE([Using 'select' zmq_poll(er)_* API polling system])
AC_DEFINE(ZMQ_POLL_BASED_ON_SELECT, 1, [Use 'select' zmq_poll(er)_* API polling system])
elif test "$api_poller" = "poll"; then
AC_MSG_NOTICE([Using 'poll' zmq_poll(er)_* API polling system])
AC_DEFINE(ZMQ_POLL_BASED_ON_POLL, 1, [Use 'poll' zmq_poll(er)_* API polling system])
else
AC_MSG_ERROR([Invalid API poller '$api_poller' specified])
fi
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_PPOLL([action-if-found], [action-if-not-found]) #
dnl # Check whether zmq_ppoll can be activated, and do so if it can #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_PPOLL], [{
AC_REQUIRE([AC_CANONICAL_HOST])
case "${host_os}" in
*mingw*|*cygwin*|*msys*)
# Disable ppoll by default on Windows
AC_MSG_NOTICE([NOT building active zmq_ppoll on '$host_os']) ;;
*)
LIBZMQ_CHECK_PSELECT([
AC_MSG_NOTICE([Building with zmq_ppoll])
AC_DEFINE(ZMQ_HAVE_PPOLL, 1, [Build with zmq_ppoll])
])
;;
esac
}])
dnl ##############################################################################
dnl # LIBZMQ_CHECK_CACHELINE #
dnl # Check cacheline size for alignment purposes #
dnl ##############################################################################
AC_DEFUN([LIBZMQ_CHECK_CACHELINE], [{
zmq_cacheline_size=64
AC_CHECK_TOOL(libzmq_getconf, getconf)
if ! test "x$libzmq_getconf" = "x"; then
zmq_cacheline_size=$($libzmq_getconf LEVEL1_DCACHE_LINESIZE 2>/dev/null || echo 64)
if test "x$zmq_cacheline_size" = "x0" -o "x$zmq_cacheline_size" = "x-1"; then
# getconf on some architectures does not know the size, try to fallback to
# the value the kernel knows on Linux
zmq_cacheline_size=$(cat /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size 2>/dev/null || echo 64)
fi
fi
if test "x$zmq_cacheline_size" = "xundefined"; then
# On some platforms e.g. Fedora33 s390x the cacheline size reported
# by getconf as 'undefined'.
zmq_cacheline_size=64
fi
AC_MSG_NOTICE([Using "$zmq_cacheline_size" bytes alignment for lock-free data structures])
AC_DEFINE_UNQUOTED(ZMQ_CACHELINE_SIZE, $zmq_cacheline_size, [Using "$zmq_cacheline_size" bytes alignment for lock-free data structures])
}])
dnl ################################################################################
dnl # LIBZMQ_CHECK_CV_IMPL([action-if-found], [action-if-not-found]) #
dnl # Choose condition variable implementation #
dnl ################################################################################
AC_DEFUN([LIBZMQ_CHECK_CV_IMPL], [{
# Allow user to override condition variable autodetection
AC_ARG_WITH([cv-impl],
[AS_HELP_STRING([--with-cv-impl],
[choose condition variable implementation manually. Valid values are 'stl11', 'pthread', 'none', or 'auto'. [default=auto]])])
if test "x$with_cv_impl" = "x"; then
cv_impl=auto
else
cv_impl=$with_cv_impl
fi
case $host_os in
vxworks*)
cv_impl="vxworks"
AC_DEFINE(ZMQ_USE_CV_IMPL_VXWORKS, 1, [Use vxworks condition variable implementation.])
;;
esac
if test "$cv_impl" = "auto" || test "$cv_impl" = "stl11"; then
AC_LANG_PUSH([C++])
AC_CHECK_HEADERS(condition_variable, [stl11="yes"
AC_DEFINE(ZMQ_USE_CV_IMPL_STL11, 1, [Use stl11 condition variable implementation.])],
[stl11="no"])
AC_LANG_POP([C++])
if test "$cv_impl" = "stl11" && test "x$stl11" = "xno"; then
AC_MSG_ERROR([--with-cv-impl set to stl11 but cannot find condition_variable])
fi
fi
if test "$cv_impl" = "pthread" || test "x$stl11" = "xno"; then
AC_DEFINE(ZMQ_USE_CV_IMPL_PTHREADS, 1, [Use pthread condition variable implementation.])
fi
if test "$cv_impl" = "none"; then
AC_DEFINE(ZMQ_USE_CV_IMPL_NONE, 1, [Use no condition variable implementation.])
fi
AC_MSG_NOTICE([Using "$cv_impl" condition variable implementation.])
}])
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