dnl $Id: configure.in,v 1.11 2001/08/25 16:08:28 skids Exp $
dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.13)

AC_INIT(include/ggi/misc.h)

dnl Put the name and version of the package here
AM_INIT_AUTOMAKE(libggimisc,2.0.1,-)

AM_MAINTAINER_MODE
AM_DISABLE_STATIC


dnl ========================================================================
dnl Set some defaults

PATHTAG="pAtHTAg"
TAGLEN="7"
ggimisc_conffile="libggimisc.conf"
ggi_subdir="ggi"

use_debug="yes"

dnl - Targets
build_fbdev_target="auto"
build_svgalib_target="auto"
build_x_target="auto"

dnl ========================================================================
dnl Checks for programs.

dnl Check for C compiler
AC_PROG_CC
dnl Tell the build system that this is a well-written extension from which
dnl it is possible to build Win32 DLLs
AC_LIBTOOL_WIN32_DLL
dnl Configure libtool
AM_PROG_LIBTOOL
dnl Check for the 'install' program
AC_PROG_INSTALL


dnl ========================================================================
dnl User selectable options

AC_ARG_WITH(ggi,
[  --with-ggi=DIR          use the LibGGI installed with prefix DIR
                           (can be used to specify location of LibGII too)],
CFLAGS="$CFLAGS -I$withval/include"
CPPFLAGS="$CPPFLAGS -I$withval/include"
LDFLAGS="$LDFLAGS -L$withval/lib")

AC_ARG_WITH(uninst-ggi,
[  --with-uninst-ggi=DIR   use uninstalled copy of LibGGI found in DIR],
absval=`(cd "$withval"; pwd)`
CFLAGS="$CFLAGS -I$absval/include"
CPPFLAGS="$CPPFLAGS -I$absval/include"
LDFLAGS="$LDFLAGS -L$absval/ggi")

AC_ARG_WITH(uninst-gii,
[  --with-uninst-gii=DIR   use uninstalled copy of LibGII found in DIR],
absval=`(cd "$withval"; pwd)`
CFLAGS="$CFLAGS -I$absval/include"
CPPFLAGS="$CPPFLAGS -I$absval/include"
LDFLAGS="$LDFLAGS -L$absval/gg -L$absval/gii")

AC_ARG_ENABLE(debug,
[  --disable-debug         don't build with run-time debugging (speed freaks)],
use_debug=$enableval)

dnl - TARGETS:
AC_ARG_ENABLE(fbdev,
[  --disable-fbdev             don't build the fbdev target],
build_fbdev_target=$enableval)


AC_ARG_ENABLE(svgalib,
[  --disable-svgalib             don't build the svgalib target],
build_svgalib_target=$enableval)


AC_ARG_ENABLE(x,
[  --disable-x             don't build the X target],
build_x_target=$enableval)



dnl Support the --with-extra-libs and --with-extra-includes command line
dnl options to 'configure'.
GGI_EXTRA_PATHS


dnl ========================================================================
dnl Checks for header files.

dnl Check for standard C headers
AC_HEADER_STDC
dnl - Check for other headers
AC_CHECK_HEADERS(ggi/ggi.h linux/fb.h)

dnl - Must have these extra headers to build.

dnl ========================================================================
dnl Checks for typedefs, structures, and compiler characteristics.

dnl Check if the compiler supports the 'const' keyword, otherwise define
dnl 'const' to empty.
AC_C_CONST
dnl Check if the compiler supports inlining. If it does define 'inline' to
dnl the apropriate keyword, otherwise define it to empty.
AC_C_INLINE

dnl Check for the extension of shared libraries (excluding the dot) and
dnl put it in the @DLLEXT@ Makefile variable.
GGI_DLLEXT

dnl ========================================================================
dnl - Checks for library functions.


dnl ========================================================================
dnl LibGGI must be built

ggi_missing_part=no

AC_CHECK_LIB(ggi,ggiInit,foo=bar,ggi_missing_part=yes)

if test "$ac_cv_header_ggi_ggi_h" != "yes"; then
  ggi_missing_part=yes
fi


dnl ========================================================================
dnl - Checks for target-specific libraries and headers

DISPLAYSUBDIRS=""

dnl Check for the function 'vga_init' in the 'vga' library.
dnl If not found we disable the "svgalib" target.
AC_CHECK_LIB(vga,vga_init, foo=bar, build_svgalib_target="no")


dnl Use AC_PATH_XTRA if you want to build something that uses X
if test "x$build_x_target" != "xno"; then
  AC_PATH_XTRA
    if test "x$no_x" = "xyes"; then
    build_x_target="no"
  fi
fi

dnl If linux/fb.h was not found above we disable the "fbdev" target.
if test "x$ac_cv_header_linux_fb_h" != "xyes"; then
  build_fbdev_target="no"
fi

if test "x$build_fbdev_target" != "xno"; then
    AC_TRY_COMPILE([
#include <linux/fb.h>
],[
int i =  FB_VBLANK_VBLANKING;
],
    foo=bar,
    build_fbdev_target="no")
fi


dnl ========================================================================
dnl - Check for targets

AC_MSG_CHECKING(if we should build fbdev    target)
if test "x$build_fbdev_target" = "xno"; then
  AC_MSG_RESULT(no)
else
  DISPLAYSUBDIRS="$DISPLAYSUBDIRS fbdev"
  build_fbdev_target="yes"
  AC_MSG_RESULT(yes)
fi


AC_MSG_CHECKING(if we should build svgalib  target)
if test "x$build_svgalib_target" = "xno"; then
  AC_MSG_RESULT(no)
else
  DISPLAYSUBDIRS="$DISPLAYSUBDIRS svgalib"
  build_svgalib_target="yes"
  AC_MSG_RESULT(yes)
fi


AC_MSG_CHECKING(if we should build X        target)
if test "x$build_x_target" = "xno"; then
  AC_MSG_RESULT(no)
else
  DISPLAYSUBDIRS="$DISPLAYSUBDIRS X"
  build_x_target="yes"
  AC_MSG_RESULT(yes)
fi




dnl ========================================================================
dnl Finally add some flags

dnl _THREAD_SAFE is used instead of _REENTRANT on some systems
CFLAGS="$CFLAGS -D_REENTRANT -D_THREAD_SAFE"

if test "x$use_debug" = "xyes"; then
  AC_DEFINE(DEBUG)
  if test "$ac_cv_prog_gcc" = "yes"; then
    CFLAGS="$CFLAGS -g -Wall -Wstrict-prototypes"
  fi
fi


dnl ========================================================================
dnl Write output

AC_SUBST(DISPLAYSUBDIRS)

dnl Bah! autoconf hasn't set prefix to it's default value yet!
test "x$prefix" = xNONE && prefix=$ac_default_prefix
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'

dnl Use static_* to substitute into files where values shouldn't
dnl dynamicly change.  Makefiles need to be able to dynamicly change
dnl paths between build and install and shouldn't use these static_*.
dnl Files that will be installed must always show the final location where
dnl they will reside and should use these static_* values.
dnl Ensure that all static_* are fully expanded.

eval static_libdir="$libdir"
old_val=""
until test "$static_libdir" = "$old_val"; do
	old_val="$static_libdir"
	eval static_libdir="$static_libdir"
done

eval static_sysconfdir="$sysconfdir"
old_val=""
until test "$static_sysconfdir" = "$old_val"; do
      old_val="$static_sysconfdir"
      eval static_sysconfdir="$static_sysconfdir"
done

AC_SUBST(ggi_subdir)
AC_SUBST(static_libdir)
AC_SUBST(static_sysconfdir)
AC_DEFINE_UNQUOTED(GGIMISCTAGLEN,$TAGLEN)
AC_DEFINE_UNQUOTED(GGIMISCPATHTAG,"$PATHTAG")
AC_DEFINE_UNQUOTED(GGIMISCCONFFILE,"$PATHTAG$static_sysconfdir/$ggi_subdir/$ggimisc_conffile")

AM_CONFIG_HEADER(config.h)

AC_OUTPUT(
Makefile
include/Makefile
include/ggi/Makefile
include/ggi/internal/Makefile
ggimisc/Makefile
display/Makefile
display/X/Makefile
display/svgalib/Makefile
display/fbdev/Makefile
demos/Makefile
doc/Makefile
doc/man/Makefile
m4/Makefile
dist/Makefile
dist/rpm/Makefile
dist/rpm/libggimisc.spec
libggimisc.conf
)

if test "$ggi_missing_part" = "yes"; then 
  AC_MSG_WARN([
LibGGI is not properly installed on the system. You need LibGGI for
building the LibGGIMisc extension. Please compile LibGGI first.
])
fi