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dnl ##############################################################################
dnl # AC_ZMQ_CONFIG_LIBTOOL #
dnl # Configure libtool. Requires AC_CANONICAL_HOST #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CONFIG_LIBTOOL], [{
AC_REQUIRE([AC_CANONICAL_HOST])
# Libtool configuration for different targets
case "${host_os}" in
*mingw32*|*cygwin*)
# Disable static build by default
AC_DISABLE_STATIC
;;
*)
# Everything else with static enabled
AC_ENABLE_STATIC
;;
esac
}])
dnl ##############################################################################
dnl # AC_ZMQ_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([AC_ZMQ_CHECK_LANG_ICC],
[AC_CACHE_CHECK([whether we are using Intel _AC_LANG compiler],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#ifndef __INTEL_COMPILER
error if not ICC
#endif
]])],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler="yes" ; $1],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # AC_ZMQ_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([AC_ZMQ_CHECK_LANG_SUN_STUDIO],
[AC_CACHE_CHECK([whether we are using Sun Studio _AC_LANG compiler],
[ac_zmq_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
]])],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler="yes" ; $1],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_LANG_CLANG([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using clang #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_CLANG],
[AC_CACHE_CHECK([whether we are using clang _AC_LANG compiler],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#ifndef __clang__
error if not clang
#endif
]])],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler="yes" ; $1],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_LANG_GCC4([action-if-found], [action-if-not-found]) #
dnl # Check if the current language is compiled using clang #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_GCC4],
[AC_CACHE_CHECK([whether we are using gcc >= 4 _AC_LANG compiler],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler],
[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[[#if (!defined __GNUC__ || __GNUC__ < 4)
error if not gcc4 or higher
#endif
]])],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler="yes" ; $1],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler="no" ; $2])
])])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_DOC_BUILD #
dnl # Check whether to build documentation and install man-pages #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_DOC_BUILD], [{
# Allow user to disable doc build
AC_ARG_WITH([documentation], [AS_HELP_STRING([--without-documentation],
[disable documentation build even if asciidoc and xmlto are present [default=no]])])
if test "x$with_documentation" = "xno"; then
ac_zmq_build_doc="no"
ac_zmq_install_man="no"
else
# Determine whether or not documentation should be built and installed.
ac_zmq_build_doc="yes"
ac_zmq_install_man="yes"
# Check for asciidoc and xmlto and don't build the docs if these are not installed.
AC_CHECK_PROG(ac_zmq_have_asciidoc, asciidoc, yes, no)
AC_CHECK_PROG(ac_zmq_have_xmlto, xmlto, yes, no)
if test "x$ac_zmq_have_asciidoc" = "xno" -o "x$ac_zmq_have_xmlto" = "xno"; then
ac_zmq_build_doc="no"
# Tarballs built with 'make dist' ship with prebuilt documentation.
if ! test -f doc/zmq.7; then
ac_zmq_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$ac_zmq_on_mingw32" = "xyes"; then
ac_zmq_install_man="no"
fi
fi
AC_MSG_CHECKING([whether to build documentation])
AC_MSG_RESULT([$ac_zmq_build_doc])
AC_MSG_CHECKING([whether to install manpages])
AC_MSG_RESULT([$ac_zmq_install_man])
AM_CONDITIONAL(BUILD_DOC, test "x$ac_zmq_build_doc" = "xyes")
AM_CONDITIONAL(INSTALL_MAN, test "x$ac_zmq_install_man" = "xyes")
}])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_LANG_COMPILER([action-if-found], [action-if-not-found]) #
dnl # Check that compiler for the current language actually works #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_COMPILER], [{
# Test that compiler for the current language actually works
AC_CACHE_CHECK([whether the _AC_LANG compiler works],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_compiler_works],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_compiler_works="yes" ; $1],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_compiler_works="no" ; $2])
])
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_compiler_works" != "xyes"; then
AC_MSG_ERROR([Unable to find a working _AC_LANG compiler])
fi
}])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_COMPILERS #
dnl # Check compiler characteristics. This is so that we can AC_REQUIRE checks #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_COMPILERS], [{
# For that the compiler works and try to come up with the type
AC_LANG_PUSH([C])
AC_ZMQ_CHECK_LANG_COMPILER
AC_ZMQ_CHECK_LANG_ICC
AC_ZMQ_CHECK_LANG_SUN_STUDIO
AC_ZMQ_CHECK_LANG_CLANG
AC_ZMQ_CHECK_LANG_GCC4
AC_LANG_POP([C])
AC_LANG_PUSH(C++)
AC_ZMQ_CHECK_LANG_COMPILER
AC_ZMQ_CHECK_LANG_ICC
AC_ZMQ_CHECK_LANG_SUN_STUDIO
AC_ZMQ_CHECK_LANG_CLANG
AC_ZMQ_CHECK_LANG_GCC4
AC_LANG_POP([C++])
# Set GCC and GXX variables correctly
if test "x$GCC" = "xyes"; then
if test "xyes" = "x$ac_zmq_cv_c_intel_compiler"; then
GCC="no"
fi
fi
if test "x$GXX" = "xyes"; then
if test "xyes" = "x$ac_zmq_cv_cxx_intel_compiler"; then
GXX="no"
fi
fi
}])
dnl ############################################################################
dnl # AC_ZMQ_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 ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_[FLAG]=yes/no #
dnl ############################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_FLAG], [{
AC_REQUIRE([AC_PROG_GREP])
AC_MSG_CHECKING([whether _AC_LANG compiler supports $1])
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save=$ac_[]_AC_LANG_ABBREV[]_werror_flag
ac_[]_AC_LANG_ABBREV[]_werror_flag="yes"
case "x[]_AC_LANG_ABBREV" in
xc)
ac_zmq_cv_check_lang_flag_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
;;
xcxx)
ac_zmq_cv_check_lang_flag_save_CPPFLAGS="$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(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="no"
else
eval AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="yes"
fi],
[eval AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)="no"])
case "x[]_AC_LANG_ABBREV" in
xc)
CFLAGS="$ac_zmq_cv_check_lang_flag_save_CFLAGS"
;;
xcxx)
CPPFLAGS="$ac_zmq_cv_check_lang_flag_save_CPPFLAGS"
;;
*)
# nothing to restore
;;
esac
# Restore the werror flag
ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save
# Call the action as the flags are restored
AS_IF([eval test x$]AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[AC_MSG_RESULT(yes) ; $2], [AC_MSG_RESULT(no) ; $3])
}])
dnl ####################################################################################
dnl # AC_ZMQ_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 ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_[FLAG]=yes/no #
dnl ####################################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_FLAG_PREPEND], [{
AC_ZMQ_CHECK_LANG_FLAG([$1])
case "x[]_AC_LANG_ABBREV" in
xc)
AS_IF([eval test x$]AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[CFLAGS="$1 $CFLAGS"; $2], $3)
;;
xcxx)
AS_IF([eval test x$]AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_flag_$1)[ = "xyes"],
[CPPFLAGS="$1 $CPPFLAGS"; $2], $3)
;;
esac
}])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_ENABLE_DEBUG([action-if-found], [action-if-not-found]) #
dnl # Check whether to enable debug build and set compiler flags accordingly #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_ENABLE_DEBUG], [{
# Require compiler specifics
AC_REQUIRE([AC_ZMQ_CHECK_COMPILERS])
# This flag is checked also in
AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug],
[Enable debugging information [default=no]])])
AC_MSG_CHECKING(whether to enable debugging information)
if test "x$enable_debug" = "xyes"; then
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o \
"x$ac_zmq_cv_c_intel_compiler" = "xyes" -o \
"x$ac_zmq_cv_c_clang_compiler" = "xyes"; then
CFLAGS="-g -O0 "
elif test "x$ac_zmq_cv_c_sun_studio_compiler" = "xyes"; then
CFLAGS="-g0 "
fi
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o \
"x$ac_zmq_cv_cxx_intel_compiler" = "xyes" -o \
"x$ac_zmq_cv_cxx_clang_compiler" = "xyes"; then
CPPFLAGS="-g -O0 "
CXXFLAGS="-g -O0 "
# Sun studio
elif test "x$ac_zmq_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} ${ZMQ_ORIG_CXXFLAGS}"
fi
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
}])
dnl ##############################################################################
dnl # AC_ZMQ_CHECK_WITH_FLAG([flags], [macro]) #
dnl # Runs a normal autoconf check with compiler flags #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_CHECK_WITH_FLAG], [{
ac_zmq_check_with_flag_save_CFLAGS="$CFLAGS"
ac_zmq_check_with_flag_save_CPPFLAGS="$CPPFLAGS"
CFLAGS="$CFLAGS $1"
CPPFLAGS="$CPPFLAGS $1"
# Execute the macro
$2
CFLAGS="$ac_zmq_check_with_flag_save_CFLAGS"
CPPFLAGS="$ac_zmq_check_with_flag_save_CPPFLAGS"
}])
dnl ##############################################################################
dnl # AC_ZMQ_LANG_WALL([action-if-found], [action-if-not-found]) #
dnl # How to define -Wall for the current compiler #
dnl # Sets ac_zmq_cv_[]_AC_LANG_ABBREV[]__wall_flag variable to found style #
dnl ##############################################################################
AC_DEFUN([AC_ZMQ_LANG_WALL], [{
AC_MSG_CHECKING([how to enable additional warnings for _AC_LANG compiler])
ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-Wall"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-v"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="-Wall"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag="+w"
fi
;;
*)
;;
esac
# Call the action
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag" != "x"; then
AC_MSG_RESULT([$ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ####################################################################
dnl # AC_ZMQ_LANG_STRICT([action-if-found], [action-if-not-found]) #
dnl # Check how to turn on strict standards compliance #
dnl ####################################################################
AC_DEFUN([AC_ZMQ_LANG_STRICT], [{
AC_MSG_CHECKING([how to enable strict standards compliance in _AC_LANG compiler])
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-pedantic"
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-strict-ansi"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-Xc"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-pedantic"
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-strict-ansi"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag="-compat=5"
fi
;;
*)
;;
esac
# Call the action
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag" != "x"; then
AC_MSG_RESULT([$ac_zmq_cv_[]_AC_LANG_ABBREV[]_strict_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ########################################################################
dnl # AC_ZMQ_LANG_WERROR([action-if-found], [action-if-not-found]) #
dnl # Check how to turn warnings to errors #
dnl ########################################################################
AC_DEFUN([AC_ZMQ_LANG_WERROR], [{
AC_MSG_CHECKING([how to turn warnings to errors in _AC_LANG compiler])
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag=""
# C compilers
case "x[]_AC_LANG_ABBREV" in
xc)
# GCC, clang and ICC
if test "x$GCC" = "xyes" -o "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-Werror"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-errwarn=%all"
fi
;;
xcxx)
# GCC, clang and ICC
if test "x$GXX" = "xyes" -o "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-Werror"
# Sun studio
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag="-errwarn=%all"
fi
;;
*)
;;
esac
# Call the action
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag" != "x"; then
AC_MSG_RESULT([$ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag])
$1
else
AC_MSG_RESULT([not found])
$2
fi
}])
dnl ################################################################################
dnl # AC_ZMQ_CHECK_LANG_PRAGMA([pragma], [action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports given pragma #
dnl ################################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_PRAGMA], [{
# Need to know how to enable all warnings
AC_ZMQ_LANG_WALL
AC_MSG_CHECKING([whether _AC_LANG compiler supports pragma $1])
# Save flags
ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save=$ac_[]_AC_LANG_ABBREV[]_werror_flag
ac_[]_AC_LANG_ABBREV[]_werror_flag="yes"
if test "x[]_AC_LANG_ABBREV" = "xc"; then
ac_zmq_cv_check_lang_pragma_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $ac_zmq_cv_[]_AC_LANG_ABBREV[]_wall_flag"
elif test "x[]_AC_LANG_ABBREV" = "xcxx"; then
ac_zmq_cv_check_lang_pragma_save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $ac_zmq_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(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)="yes" ; AC_MSG_RESULT(yes)],
[eval AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)="no" ; AC_MSG_RESULT(no)])
if test "x[]_AC_LANG_ABBREV" = "xc"; then
CFLAGS="$ac_zmq_cv_check_lang_pragma_save_CFLAGS"
elif test "x[]_AC_LANG_ABBREV" = "xcxx"; then
CPPFLAGS="$ac_zmq_cv_check_lang_pragma_save_CPPFLAGS"
fi
ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_zmq_cv_[]_AC_LANG_ABBREV[]_werror_flag_save
# Call the action as the flags are restored
AS_IF([eval test x$]AS_TR_SH(ac_zmq_cv_[]_AC_LANG_ABBREV[]_supports_pragma_$1)[ = "xyes"],
[$2], [$3])
}])
dnl ################################################################################
dnl # AC_ZMQ_CHECK_LANG_VISIBILITY([action-if-found], [action-if-not-found]) #
dnl # Check if the compiler supports dso visibility #
dnl ################################################################################
AC_DEFUN([AC_ZMQ_CHECK_LANG_VISIBILITY], [{
ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag=""
if test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_clang_compiler" = "xyes" -o \
"x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_gcc4_compiler" = "xyes"; then
AC_ZMQ_CHECK_LANG_FLAG([-fvisibility=hidden],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag="-fvisibility=hidden"])
elif test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" = "xyes"; then
AC_ZMQ_CHECK_LANG_FLAG([-xldscope=hidden],
[ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag="-xldscope=hidden"])
fi
AC_MSG_CHECKING(whether _AC_LANG compiler supports dso visibility)
AS_IF([test "x$ac_zmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag" != "x"],
[AC_MSG_RESULT(yes) ; $1], [AC_MSG_RESULT(no) ; $2])
}])
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