#

# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

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#

################################################################################

# Setup alsa (Advanced Linux Sound Architecture)

################################################################################

AC_DEFUN_ONCE([LIB_SETUP_ALSA],

[

  AC_ARG_WITH(alsa, [AS_HELP_STRING([--with-alsa],

      [specify prefix directory for the alsa package

      (expecting the libraries under PATH/lib and the headers under PATH/include)])])

  AC_ARG_WITH(alsa-include, [AS_HELP_STRING([--with-alsa-include],

      [specify directory for the alsa include files])])

  AC_ARG_WITH(alsa-lib, [AS_HELP_STRING([--with-alsa-lib],

      [specify directory for the alsa library])])

  if test "x$NEEDS_LIB_ALSA" = xfalse; then

    if (test "x${with_alsa}" != x && test "x${with_alsa}" != xno) || \

        (test "x${with_alsa_include}" != x && test "x${with_alsa_include}" != xno) || \

        (test "x${with_alsa_lib}" != x && test "x${with_alsa_lib}" != xno); then

      AC_MSG_WARN([[alsa not used, so --with-alsa[-*] is ignored]])

    fi

    ALSA_CFLAGS=

    ALSA_LIBS=

  else

    ALSA_FOUND=no

    if test "x${with_alsa}" = xno || test "x${with_alsa_include}" = xno || test "x${with_alsa_lib}" = xno; then

      AC_MSG_ERROR([It is not possible to disable the use of alsa. Remove the --without-alsa option.])

    fi

    if test "x${with_alsa}" != x; then

      ALSA_LIBS="-L${with_alsa}/lib -lasound"

      ALSA_CFLAGS="-I${with_alsa}/include"

      ALSA_FOUND=yes

    fi

    if test "x${with_alsa_include}" != x; then

      ALSA_CFLAGS="-I${with_alsa_include}"

      ALSA_FOUND=yes

    fi

    if test "x${with_alsa_lib}" != x; then

      ALSA_LIBS="-L${with_alsa_lib} -lasound"

      ALSA_FOUND=yes

    fi

    # Do not try pkg-config if we have a sysroot set.

    if test "x$SYSROOT" = x; then

      if test "x$ALSA_FOUND" = xno; then

        PKG_CHECK_MODULES(ALSA, alsa, [ALSA_FOUND=yes], [ALSA_FOUND=no])

      fi

    fi

    if test "x$ALSA_FOUND" = xno; then

      AC_CHECK_HEADERS([alsa/asoundlib.h],

          [

            ALSA_FOUND=yes

            ALSA_CFLAGS=-Iignoreme

            ALSA_LIBS=-lasound

            DEFAULT_ALSA=yes

          ],

          [ALSA_FOUND=no]

      )

    fi

    if test "x$ALSA_FOUND" = xno; then

      HELP_MSG_MISSING_DEPENDENCY([alsa])

      AC_MSG_ERROR([Could not find alsa! $HELP_MSG])

    fi

  fi

  AC_SUBST(ALSA_CFLAGS)

  AC_SUBST(ALSA_LIBS)

])