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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_perl_ext.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_PERL_EXT
#
# DESCRIPTION
#
# Fetches the linker flags and C compiler flags for compiling and linking
# Perl binary extensions. The macro substitutes PERL_EXT_PREFIX,
# PERL_EXT_INC, PERL_EXT_LIB, PERL_EXT_CPPFLAGS, PERL_EXT_LDFLAGS and
# PERL_EXT_DLEXT variables if Perl executable was found. It also checks
# the same variables before trying to retrieve them from the Perl
# configuration.
#
# PERL_EXT_PREFIX: top-level perl installation path (--prefix)
# PERL_EXT_INC: XS include directory
# PERL_EXT_LIB: Perl extensions destination directory
# PERL_EXT_CPPFLAGS: C preprocessor flags to compile extensions
# PERL_EXT_LDFLAGS: linker flags to build extensions
# PERL_EXT_DLEXT: extensions suffix for perl modules (e.g. ".so")
#
# Examples:
#
# AX_PERL_EXT
# if test x"$PERL" = x; then
# AC_ERROR(["cannot find Perl"])
# fi
#
# LICENSE
#
# Copyright (c) 2011 Stanislav Sedov <stas@FreeBSD.org>
# Copyright (c) 2014 Thomas Klausner <tk@giga.or.at>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.
#serial 3
AC_DEFUN([AX_PERL_EXT],[
#
# Check if perl executable exists.
#
AC_PATH_PROGS(PERL, ["${PERL-perl}"], [])
if test -n "$PERL" ; then
#
# Check for Perl prefix.
#
AC_ARG_VAR(PERL_EXT_PREFIX, [Perl PREFIX])
AC_MSG_CHECKING([for Perl prefix])
if test -z "$PERL_EXT_PREFIX" ; then
[PERL_EXT_PREFIX=`$PERL -MConfig -e 'print $Config{prefix};'`];
fi
AC_MSG_RESULT([$PERL_EXT_PREFIX])
AC_SUBST(PERL_EXT_PREFIX)
#
# Check for Perl extensions include path.
#
AC_ARG_VAR(PERL_EXT_INC, [Directory to include XS headers from])
AC_MSG_CHECKING([for Perl extension include path])
if test -z "$PERL_EXT_INC" ; then
[PERL_EXT_INC=`$PERL -MConfig -e 'print $Config{archlibexp}, "/CORE";'`];
fi
AC_MSG_RESULT([$PERL_EXT_INC])
AC_SUBST(PERL_EXT_INC)
#
# Check for the extensions target directory.
#
AC_ARG_VAR(PERL_EXT_LIB, [Directory to install perl files into])
AC_MSG_CHECKING([for Perl extension target directory])
if test -z "$PERL_EXT_LIB" ; then
[PERL_EXT_LIB=`$PERL -MConfig -e 'print $Config{sitearch};'`];
fi
AC_MSG_RESULT([$PERL_EXT_LIB])
AC_SUBST(PERL_EXT_LIB)
#
# Check for Perl CPP flags.
#
AC_ARG_VAR(PERL_EXT_CPPFLAGS, [CPPFLAGS to compile perl extensions])
AC_MSG_CHECKING([for Perl extensions C preprocessor flags])
if test -z "$PERL_EXT_CPPFLAGS" ; then
[PERL_EXT_CPPFLAGS=`$PERL -MConfig -e 'print $Config{cppflags};'`];
fi
AC_MSG_RESULT([$PERL_EXT_CPPFLAGS])
AC_SUBST(PERL_EXT_CPPFLAGS)
#
# Check for Perl extension link flags.
#
AC_ARG_VAR(PERL_EXT_LDFLAGS, [LDFLAGS to build perl extensions])
AC_MSG_CHECKING([for Perl extensions linker flags])
if test -z "$PERL_EXT_LDFLAGS" ; then
[PERL_EXT_LDFLAGS=`$PERL -MConfig -e 'print $Config{lddlflags};'`];
fi
# Fix LDFLAGS for OS X. We don't want any -arch flags here, otherwise
# linking will fail. Also, OS X Perl LDFLAGS contains "-arch ppc" which
# is not supported by XCode anymore.
case "${host}" in
*darwin*)
PERL_EXT_LDFLAGS=`echo ${PERL_EXT_LDFLAGS} | sed -e "s,-arch [[^ ]]*,,g"`
;;
esac
AC_MSG_RESULT([$PERL_EXT_LDFLAGS])
AC_SUBST(PERL_EXT_LDFLAGS)
#
# Check for Perl dynamic library extension.
#
AC_ARG_VAR(PERL_EXT_DLEXT, [Perl dynamic library extension])
AC_MSG_CHECKING([for Perl dynamic library extension])
if test -z "$PERL_EXT_DLEXT" ; then
[PERL_EXT_DLEXT=`$PERL -MConfig -e 'print ".", $Config{'dlext'};'`];
fi
AC_MSG_RESULT([$PERL_EXT_DLEXT])
AC_SUBST(PERL_EXT_DLEXT)
fi
])
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