dnl Copyright (C) 2008 - 2019 Thomas Schmitt <scdbackup@gmx.net>
dnl Copyright (C) 2000-2002, 2007-2009 Free Software Foundation, Inc.
dnl Provided under GPL version 2 or later.


AC_DEFUN([LIBBURNIA_SET_FLAGS],
[
case $target_os in
freebsd*)
        LDFLAGS="$LDFLAGS -L/usr/local/lib"
        CPPFLAGS="$CPPFLAGS -I/usr/local/include"
        ;;
netbsd*)
        LDFLAGS="$LDFLAGS -L/usr/local/lib -L/usr/pkg/lib"
        CPPFLAGS="$CPPFLAGS -I/usr/local/include -I/usr/pkg/include"
        ;;
solaris*)
        LDFLAGS="$LDFLAGS -L/usr/local/lib"
esac
])


AC_DEFUN([TARGET_SHIZZLE],
[
  ARCH=""
  LIBBURNIA_PKGCONFDIR="$libdir"/pkgconfig

  AC_MSG_CHECKING([target operating system])

  libburn_check_libcam=
  LIBBURNIA_SUPP_ACL=none
  LIBBURNIA_SUPP_FATTR=none
  LIBBURNIA_LDCONFIG_CMD="echo 'No ldconfig run performed. If needed, configure manually for:'"
  case $target in
    *-*-linux*)
      ARCH=linux
      LIBBURN_ARCH_LIBS=
      LIBBURNIA_SUPP_ACL=libacl
      LIBBURNIA_SUPP_FATTR=xattr
      LIBBURNIA_LDCONFIG_CMD=ldconfig
      ;;
    *-*-freebsd*)
      ARCH=freebsd
      LIBBURN_ARCH_LIBS=-lcam
      LIBBURNIA_SUPP_ACL=libacl
      LIBBURNIA_SUPP_FATTR=extattr

      # This may later be overridden by configure --enable-libdir-pkgconfig
      LIBBURNIA_PKGCONFDIR=$(echo "$libdir" | sed 's/\/lib$/\/libdata/')/pkgconfig
      ;;
    *-kfreebsd*-gnu*)
      ARCH=freebsd
      LIBBURN_ARCH_LIBS=-lcam
      libburn_check_libcam=yes
      ;;
    *-solaris*)
      ARCH=solaris
      LIBBURN_ARCH_LIBS=-lvolmgt
      ;;
    *)
      ARCH=
      LIBBURN_ARCH_LIBS=
#      AC_MSG_ERROR(You are attempting to compile for an unsupported platform)
      ;;
  esac
  AC_MSG_RESULT([$ARCH])

  if test x"$libburn_check_libcam" = xyes
  then
    LIBBURNIA_CHECK_LIBCAM
  fi
])


dnl LIBBURNIA_CHECK_ICONV is by Thomas Schmitt, libburnia project
dnl It is based on gestures from:
dnl iconv.m4 serial AM7 (gettext-0.18)
dnl Copyright (C) 2000-2002, 2007-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl From Bruno Haible.
dnl
AC_DEFUN([LIBBURNIA_CHECK_ICONV],
[

  dnl Check whether it is allowed to link with -liconv
  AC_MSG_CHECKING([for iconv() in separate -liconv ])
  libburnia_liconv="no"
  libburnia_save_LIBS="$LIBS"
  LIBS="$LIBS -liconv"
  AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
#include <iconv.h>]], [[iconv_t cd = iconv_open("","");
     iconv(cd,NULL,NULL,NULL,NULL);
     iconv_close(cd);]])],[libburnia_liconv="yes"],[LIBS="$libburnia_save_LIBS"
  ])
  AC_MSG_RESULT([$libburnia_liconv])

  if test x"$libburnia_save_LIBS" = x"$LIBS"
  then
    dnl GNU iconv has no function iconv() but libiconv() and a macro iconv()
    dnl It is not tested whether this is detected by above macro.
    AC_CHECK_LIB(iconv, libiconv, , )
  fi

  dnl Check for iconv(..., const char **inbuf, ...)
  AC_MSG_CHECKING([for const qualifier with iconv() ])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <iconv.h>
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
]], [[]])],[libburnia_iconv_const=""],[libburnia_iconv_const="const"
  ])
  if test x$libburnia_iconv_const = xconst
  then
    AC_DEFINE_UNQUOTED([ICONV_CONST], [const])
  else
    AC_DEFINE_UNQUOTED([ICONV_CONST], [])
  fi
  test -z "$libburnia_iconv_const" && libburnia_iconv_const="no"
  AC_MSG_RESULT([$libburnia_iconv_const])
])


dnl LIBBURNIA_ASSERT_ICONV is by Thomas Schmitt, libburnia project
dnl 
AC_DEFUN([LIBBURNIA_ASSERT_ICONV],
[
  if test x$XORRISO_ASSUME_ICONV = x
  then
    dnl Check for the essential gestures of libisofs/util.c
    AC_MSG_CHECKING([for iconv() to be accessible now ])
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <wchar.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdio.h>
#include <limits.h>
#include <iconv.h>
#include <locale.h>
#include <langinfo.h>
#include <unistd.h>]], [[iconv_t cd = iconv_open("","");
iconv(cd,NULL,NULL,NULL,NULL);
iconv_close(cd);
]])],[iconv_test="yes"],[iconv_test="no"
    ])
    AC_MSG_RESULT([$iconv_test])
    if test x$iconv_test = xno
    then
      echo >&2
      echo "Cannot get function iconv() to work. Configuration aborted." >&2
      echo "Check whether your system needs a separate libiconv installed." >&2
      echo "If it is installed but not found, try something like" >&2
      echo '  export LDFLAGS="$LDFLAGS -L/usr/local/lib"' >&2 
      echo '  export CPPFLAGS="$CPPFLAGS -I/usr/local/include"' >&2
      echo '  export LIBS="$LIBS -liconv"' >&2
      echo "You may override this test by exporting variable" >&2
      echo "  XORRISO_ASSUME_ICONV=yes" >&2
      echo >&2
      (exit 1); exit 1;
    fi
  fi
])


dnl LIBBURNIA_TRY_EDITLINE is by Thomas Schmitt, libburnia project
dnl It performs the actual test compilation for editline.
dnl Variable LIBS has to be set by the caller.
AC_DEFUN([LIBBURNIA_TRY_EDITLINE],
[
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <histedit.h>]], [[EditLine *editline_handle; History *editline_history; HistEvent ev; int count;
editline_handle= el_init("dummy", stdin, stdout, stderr);
el_set(editline_handle, EL_EDITOR, "emacs");
editline_history= history_init();
history(editline_history, &ev, H_SETSIZE, 1000);
el_gets(editline_handle, &count);
]])],[editline_test="yes"],[editline_test="no"
    ])
])

dnl LIBBURNIA_ASSERT_EDITLINE is by Thomas Schmitt, libburnia project
dnl It disables xorriso editline if not all needed functions are present
AC_DEFUN([LIBBURNIA_ASSERT_EDITLINE],
[
  if test x$XORRISO_ASSUME_EDITLINE = x
  then
    dnl Check for the essential gestures of xorriso/text_io.c
    AC_MSG_CHECKING([for desired functions in libedit])
    libburnia_save_LIBS="$LIBS"
    LIBS="$LIBS -ledit"
    LIBBURNIA_TRY_EDITLINE
    if test x$editline_test = xno
    then
        LIBS="$libburnia_save_LIBS"
        LIBS="$LIBS -ledit"
        LIBBURNIA_TRY_EDITLINE
    fi
    if test x$editline_test = xno
    then
        READLINE_DEF=
        LIBS="$libburnia_save_LIBS"
    fi
    AC_MSG_RESULT([$editline_test $editline_msg])
  fi
])


dnl LIBBURNIA_TRY_READLINE is by Thomas Schmitt, libburnia project
dnl It performs the actual test compilation for readline.
dnl Variable LIBS has to be set by the caller.
AC_DEFUN([LIBBURNIA_TRY_READLINE],
[
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <readline/readline.h>
#include <readline/history.h>]], [[HIST_ENTRY **hl;
readline("");
add_history("");
hl= history_list();
]])],[readline_test="yes"],[readline_test="no"
    ])
])

dnl LIBBURNIA_ASSERT_READLINE is by Thomas Schmitt, libburnia project
dnl It disables xorriso readline if not all needed functions are present
AC_DEFUN([LIBBURNIA_ASSERT_READLINE],
[
  if test x$XORRISO_ASSUME_READLINE = x
  then
    dnl Check for the essential gestures of xorriso/text_io.c
    AC_MSG_CHECKING([for desired functions in libreadline])
    readline_msg=
    libburnia_save_LIBS="$LIBS"
    LIBS="$LIBS -lreadline"
    LIBBURNIA_TRY_READLINE
    if test x$readline_test = xno
    then
        LIBS="$libburnia_save_LIBS"
        LIBS="$LIBS -lreadline -lcurses"
        LIBBURNIA_TRY_READLINE
        if test x$readline_test = xyes
        then
            readline_msg=", with -lcurses"
        fi
    fi
    if test x$readline_test = xno
    then
        READLINE_DEF=
        LIBS="$libburnia_save_LIBS"
    fi
    AC_MSG_RESULT([$readline_test $readline_msg])
  fi
])


dnl LIBISOBURN_ASSERT_VERS_LIBS is by Thomas Schmitt, libburnia project
dnl It tests whether -Wl,--version-script=... works with the compiler
AC_DEFUN([LIBISOBURN_ASSERT_VERS_LIBS],
[
    libburnia_save_LDFLAGS="$LDFLAGS"
    LDFLAGS="$LDFLAGS -Wl,--version-script=$srcdir/libisoburn/libisoburn.ver"
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[printf("Hello\n");]])],[vers_libs_test="yes"],[vers_libs_test="no"])
    if test x$vers_libs_test = xyes
    then
        LIBLDFLAGS="-Wl,--version-script=$srcdir/libisoburn/libisoburn.ver"
    fi
    LDFLAGS="$libburnia_save_LDFLAGS"
    AC_SUBST(LIBLDFLAGS)
])


dnl LIBBURNIA_SET_PKGCONFIG is by Thomas Schmitt, libburnia project
dnl It determines the install directory for the *.pc file.
dnl Important: Must be performed _after_ TARGET_SHIZZLE
dnl
AC_DEFUN([LIBBURNIA_SET_PKGCONFIG],
[
### for testing --enable-libdir-pkgconfig on Linux
### LIBBURNIA_PKGCONFDIR="$libdir"data/pkgconfig

if test "x$LIBBURNIA_PKGCONFDIR" = "x$libdir"/pkgconfig
then
  dummy=dummy
else
  AC_ARG_ENABLE(libdir-pkgconfig,
  [  --enable-libdir-pkgconfig  Install to $libdir/pkgconfig on any OS, default=no],
   , enable_libdir_pkgconfig="no")
  AC_MSG_CHECKING([for --enable-libdir-pkgconfig])
  if test "x$enable_libdir_pkgconfig" = xyes
  then
    LIBBURNIA_PKGCONFDIR="$libdir"/pkgconfig
  fi
  AC_MSG_RESULT([$enable_libdir_pkgconfig])
fi

libburnia_pkgconfig_override="no"
AC_ARG_ENABLE(pkgconfig-path,
[  --enable-pkgconfig-path=DIR  Absolute path of directory for libisofs-*.pc],
libburnia_pkgconfig_override="yes" , enable_pkgconfig_path="none")
AC_MSG_CHECKING([for overridden pkgconfig directory path])
if test "x$enable_pkgconfig_path" = xno
then
  libburnia_pkgconfig_override="no"
fi
if test "x$enable_pkgconfig_path" = x -o "x$enable_pkgconfig_path" = xyes
then
  libburnia_pkgconfig_override="invalid argument"
fi
if test "x$libburnia_pkgconfig_override" = xyes
then
  LIBBURNIA_PKGCONFDIR="$enable_pkgconfig_path"
  AC_MSG_RESULT([$LIBBURNIA_PKGCONFDIR])
else
  AC_MSG_RESULT([$libburnia_pkgconfig_override])
fi
AC_SUBST(LIBBURNIA_PKGCONFDIR)

dnl For debugging only
### AC_MSG_RESULT([LIBBURNIA_PKGCONFDIR = $LIBBURNIA_PKGCONFDIR])
 
])

dnl LIBBURNIA_TRY_TIMEZONE is by Thomas Schmitt, libburnia project
dnl It tests whether the global variable exists and is suitable for
dnl integer arithmetics.
AC_DEFUN([LIBBURNIA_TRY_TIMEZONE],
[
    echo -n "checking for timezone variable ... "
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <time.h> ]], [[long int i; i = 1 - timezone; ]])],[LIBBURNIA_TIMEZONE="timezone"],[LIBBURNIA_TIMEZONE="0"
    ])
    echo "$LIBBURNIA_TIMEZONE"
])

dnl LIBBURNIA_CHECK_ARCH_LIBS is by Thomas Schmitt, libburnia project
dnl It tests whether the OS dependent libraries are available.
dnl With libisoburn they are needed only for the case that indirect linking
dnl does not work. So it is worth a try to omit them.
dnl $1 = "mandatory" or "optional" define the action if test linking fails.
dnl      "silent" is like "optional" but without message.
AC_DEFUN([LIBBURNIA_CHECK_ARCH_LIBS],
[
    libburnia_save_LIBS="$LIBS"
    if test "x$LIBBURN_ARCH_LIBS" = x
    then
      dummy=dummy
    else
      LIBS="$LIBS $LIBBURN_ARCH_LIBS"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[printf("Hello\n");]])],[archlibs_test="yes"],[archlibs_test="no"])
      LIBS="$libburnia_save_LIBS"
      if test x$archlibs_test = xno
      then
        if test x"$1" = xmandatory
        then
          echo >&2
          echo "FATAL: Test linking with mandatory library options failed: $LIBBURN_ARCH_LIBS" >&2
          echo >&2
          (exit 1); exit 1;
        else
          if test x"$1" = xoptional
          then
            echo "disabled linking with $LIBBURN_ARCH_LIBS (because not found)"
          fi
          LIBBURN_ARCH_LIBS=""
        fi
      else
        if test x"$1" = xsilent
        then
          dummy=dummy
        else
          echo "enabled  linking with $LIBBURN_ARCH_LIBS"
        fi
      fi
    fi
])


dnl LIBBURNIA_CHECK_LINUX_SCSI is by Thomas Schmitt, libburnia project
dnl
AC_DEFUN([LIBBURNIA_CHECK_LINUX_SCSI],
[
  dnl Check whether it is a Linux without scsi/scsi.h
  libburn_scsi_disabled=
  if test x"$ARCH" = xlinux
  then
    AH_TEMPLATE([Libburn_use_sg_dummY],
                [Define to compile without OS specific SCSI features])
    AC_MSG_CHECKING([for missing scsi/scsi.h on Linux])
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __linux
#include <scsi/scsi.h>
#endif
       ]], [[;]])],[AC_MSG_RESULT([no])],[AC_DEFINE([Libburn_use_sg_dummY], [yes])
        libburn_scsi_disabled=yes
        AC_MSG_RESULT([yes])
    ])
  fi
  if test x"$libburn_scsi_disabled" = xyes
  then
    echo "disabled operation of optical drives via SCSI"
  fi
])


dnl LIBBURNIA_CHECK_LIBCAM is by Thomas Schmitt, libburnia project
dnl
AC_DEFUN([LIBBURNIA_CHECK_LIBCAM],
[
  dnl Check whether libcam is requested for FreeBSD kernel but missing
  libburn_scsi_disabled=
  if test x"$LIBBURN_ARCH_LIBS" = x"-lcam"
  then
    AH_TEMPLATE([Libburn_use_sg_dummY],
                [Define to compile without OS specific SCSI features])
    AC_MSG_CHECKING([for missing libcam for SCSI on FreeBSD kernel])
    dnl If libcam is not available, LIBBURN_ARCH_LIBS will be made empty
    LIBBURNIA_CHECK_ARCH_LIBS(silent)
    if test x"$LIBBURN_ARCH_LIBS" = x
    then
      AC_DEFINE([Libburn_use_sg_dummY], [yes])
      libburn_scsi_disabled=yes
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([no])
    fi
  fi
  if test x"$LIBBURN_ARCH_LIBS" = x"-lcam"
  then
    AC_MSG_CHECKING([for missing libcam headers])
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
#include <camlib.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_pass.h>
         ]], [[;]])],[AC_MSG_RESULT([no])],[AC_DEFINE([Libburn_use_sg_dummY], [yes])
         libburn_scsi_disabled=yes
         AC_MSG_RESULT([yes])
    ])
  fi
  if test x"$libburn_scsi_disabled" = xyes
  then
    echo "disabled operation of optical drives via SCSI"
  fi
])