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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_lib_ev.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_EV([VERSION],[ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
#
# DESCRIPTION
#
# Checks for libev mimicking pkg-config's way of doing things for as long
# as upstream doesn't provide a .pc file. If successful and provided
# expand ACTION-IF-FOUND, otherwise expand ACTION-IF-NOT-FOUND, or, if
# omitted, error out like pkg-config does.
#
# Defines libev_LIBS and libev_CFLAGS.
#
# LICENSE
#
# Copyright (c) 2012 Sebastian Freundt <freundt@fresse.org>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 3
AC_DEFUN([AX_CHECK_EV_H], [
dnl AX_CHECK_EV_H([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl defs: ax_cv_header_ev_h yes|no
## assume libev_CFLAGS have been set
saved_CPPFLAGS="${CPPFLAGS}"
CPPFLAGS="${CPPFLAGS} ${libev_CFLAGS}"
## not so fast, we need ev.h checks
AC_CHECK_HEADER([ev.h], [
ax_cv_header_ev_h="yes"
$1
], [$2])
CPPFLAGS="${saved_CPPFLAGS}"
])
AU_ALIAS([AC_CHECK_LIBEV], [AX_LIB_EV])
AC_DEFUN([AX_LIB_EV], [
pushdef([VERSION], [m4_default([$1], [>= 4.0])])
pushdef([ACTION_IF_FOUND], [$2])
pushdef([ACTION_IF_NOT_FOUND], [$3])
AC_CACHE_VAL([ax_cv_feat_libev], [
## assume failure
ax_cv_feat_libev="no"
PKG_CHECK_MODULES([libev], [libev ]VERSION[], [:], [:])
## CHECK_MODULES' if_found case
AX_CHECK_EV_H([
ax_cv_feat_libev="yes"
if test -z "${pkg_cv_libev_LIBS}"; then
libev_LIBS="${libev_LIBS} -lev"
fi
ACTION_IF_FOUND
], [
m4_default([]ACTION_IF_NOT_FOUND[], [AC_MSG_ERROR([dnl
Package requirements (libev version) were not met.
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables libev_CFLAGS
and libev_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.])
])
])
])
popdef([ACTION_IF_NOT_FOUND])
popdef([ACTION_IF_FOUND])
popdef([VERSION])
])dnl AX_LIB_EV
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