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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_lib_id3.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_ID3([ACTION-IF-TRUE], [ACTION-IF-FALSE])
#
# DESCRIPTION
#
# This macro will check for the existence of id3lib
# (http://id3lib.sourceforge.net/). It does this by checking for the
# header file id3.h and the id3 library object file. A --with-id3lib
# option is supported as well. The following output variables are set with
# AC_SUBST:
#
# ID3_CPPFLAGS
# ID3_LDFLAGS
# ID3_LIBS
#
# You can use them like this in Makefile.am:
#
# AM_CPPFLAGS = $(ID3_CPPFLAGS)
# AM_LDFLAGS = $(ID3_LDFLAGS)
# program_LDADD = $(ID3_LIBS)
#
# Additionally, the C preprocessor symbol HAVE_ID3LIB will be defined with
# AC_DEFINE if id3lib is available.
#
# LICENSE
#
# Copyright (c) 2009 Oskar Liljeblad <oskar@osk.mine.nu>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 6
AU_ALIAS([AC_LIB_ID3], [AX_LIB_ID3])
AC_DEFUN([AX_LIB_ID3], [
AH_TEMPLATE([HAVE_ID3LIB], [Define if id3lib is available])
AC_ARG_WITH(id3lib, [ --with-id3lib=DIR prefix for id3 library files and headers], [
if test "$withval" = "no"; then
ac_id3_path=
$2
elif test "$withval" = "yes"; then
ac_id3_path=/usr
else
ac_id3_path="$withval"
fi
],[ac_id3_path=/usr])
if test "$ac_id3_path" != ""; then
saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS -I$ac_id3_path/include"
AC_CHECK_HEADER([id3.h], [
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -L$ac_id3_path/lib"
AC_CHECK_LIB(id3, ID3Tag_New, [
AC_SUBST(ID3_CPPFLAGS, [-I$ac_id3_path/include])
AC_SUBST(ID3_LDFLAGS, [-L$ac_id3_path/lib])
AC_SUBST(ID3_LIBS, [-lid3])
AC_DEFINE([HAVE_ID3LIB])
$1
], [
:
$2
])
LDFLAGS="$saved_LDFLAGS"
], [
AC_MSG_RESULT([not found])
$2
])
CPPFLAGS="$saved_CPPFLAGS"
fi
])
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