dnl Process this file with autoconf to produce a configure script.
AC_INIT(common/crc.h)
AC_CANONICAL_SYSTEM
AC_LANG_C

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_MAKE_SET

dnl checks for compiler characteristics
AC_C_BIGENDIAN

AC_ARG_WITH(optimize,
[  --with-optimize         Compile with optimization],
	RELEASE=$with_optimize
)

AC_ARG_ENABLE(release,
[  --enable-release        Compile release (with optimization)],
       RELEASE=$enable_release
)
AC_SUBST(RELEASE)

dnl Checks for OGL support
AC_ARG_ENABLE(OpenGLLIB,
[  --enable-OpenGLLIB=ARG  Use OpenGL - the libraries are in ARG],
[HAS_OGL_LIB=yes; OGL_LIB_PATH=$enable_OpenGLLIB;
   OGL_LDFLAGS=-L$enable_OpenGLLIB])
AC_SUBST(OGL_LDFLAGS)

AC_ARG_ENABLE(OpenGLINC,
[  --enable-OpenGLINC=ARG  Use OpenGL - the include files are in ARG],
HAS_OGL_INC=yes; OGL_INC_PATH=$enable_OpenGLINC; OGL_CFLAGS=-I$enable_OpenGLINC)
AC_SUBST(OGL_CFLAGS)

if test "x$HAS_OGL_LIB" = x; then
AC_CHECK_LIB(GL, glColor4f, [HAS_OGL_LIB=yes],
   AC_CHECK_LIB(MesaGL, glColor4f, [HAS_OGL_LIB=yes],
   if test "x$HAS_OGL_INC" != x; then
      POSS_OGL_LDFLAGS=`echo $enable_OpenGLINC| sed 's/include/lib/i'`;
      AC_MSG_CHECKING(for $POSS_OGL_LDFLAGS/libGL.so)
      if test -f "$POSS_OGL_LDFLAGS"/libGL.so; then
	 AC_MSG_RESULT(yes)
	 HAS_OGL_LIB=yes
	 OGL_LDFLAGS=-L$POSS_OGL_LDFLAGS
	 OGL_LIB_PATH=$POSS_OGL_LDFLAGS
      else
	 AC_MSG_RESULT(no)
      fi
   fi
   )
)
dnl Need to be able to check /usr/X11R6/lib...
fi

if test "x$HAS_OGL_INC" = x; then
   AC_CHECK_HEADER(GL/gl.h, [HAS_OGL_INC=yes],
   if test "x$HAS_OGL_LIB" != x; then
      POSS_OGL_CFLAGS=`echo $enable_OpenGLLIB| sed 's/lib/include/i'`;
      AC_MSG_CHECKING(for $POSS_OGL_CFLAGS/GL/gl.h)
      if test -f "$POSS_OGL_CFLAGS/GL/gl.h"; then
	 HAS_OGL_INC=yes
	 OGL_CFLAGS=-I$POSS_OGL_CFLAGS
	 OGL_INC_PATH=$POSS_OGL_CFLAGS
	 AC_MSG_RESULT(yes)
      else
	 AC_MSG_RESULT(no)
      fi
   fi
   )
fi

AC_MSG_CHECKING(for OpenGL support)
if test "x$HAS_OGL_INC" != x; then
   if test "x$HAS_OGL_LIB" != x; then
      HAS_OGL=yes
      AC_MSG_RESULT([yes, include ($OGL_CFLAGS), lib ($OGL_LDFLAGS)])
      if test "x$OGL_LDFLAGS" = x-L; then
         AC_MSG_ERROR(OpenGL LDFLAGS is -L with no directory)
      fi
      AC_MSG_CHECKING(for GL_COLOR_INDEX8_EXT)
      if test "x$OGL_INC_PATH" = x; then
	 OGL_INC_PATH_TO_GL="$OGL_INC_PATH/GL/gl.h"
      else
	 OGL_INC_PATH_TO_GL="GL/gl.h"
      fi
      AC_TRY_COMPILE([#include "$OGL_INC_PATH_TO_GL"],
                     [ int x = (int) GL_COLOR_INDEX8_EXT;],
                     HAS_GL_COLOR_INDEX8_EXT=yes,
                     HAS_GL_COLOR_INDEX8_EXT=no)
      if test "x$HAS_GL_COLOR_INDEX8_EXT" != xno; then
         cat >> confdefs.h <<\EOF
#define HAS_GL_COLOR_INDEX8_EXT 1
EOF
      fi
 
   else
      AC_MSG_RESULT(no)
   fi
   else
      AC_MSG_RESULT(no)
fi
AC_SUBST(HAS_OGL)

dnl Check for other libraries
AC_CHECK_LIB(vga, vga_getmousetype, [HAS_VGA=yes], [HAS_VGA=])
AC_SUBST(HAS_VGA)
AC_CHECK_LIB(xil,xil_import, [HAS_XIL=yes], [HAS_XIL=])
AC_SUBST(HAS_XIL)
AC_PATH_XTRA

AC_SUBST(x_libraries)
if test "x$no_x" = x; then
HAS_X11=yes
   if test "x$x_libraries" != x; then
      X_LIB_PATH_L=-L${x_libraries};
   else
      X_LIB_PATH_L=
   fi
AC_CHECK_LIB(Xext, XShmQueryExtension, [X11_SHM_LIB=-lXext], [X11_SHM_LIB=], ${X_LIB_PATH_L})
AC_SUBST(X11_SHM_LIB)
fi
AC_SUBST(HAS_X11)

dnl Checks for header files.
AC_CHECK_HEADER(glide.h, [HAS_GLIDE=yes], [HAS_GLIDE=])
AC_SUBST(HAS_GLIDE)

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNC(stricmp, 
	[STRICMP_DEF=],
	AC_CHECK_FUNC(strcasecmp, [STRICMP_DEF=-Dstricmp=strcasecmp]))
AC_SUBST(STRICMP_DEF)


##########################################################
#
# Release (optimized) compiler settings (GCC only)
#
if test "x$RELEASE" = xyes; then
if test "x$GCC" = xyes; then
AC_MSG_CHECKING(for special release compiler settings)
BASE_RELEASE_CFLAGS="-O6 -ffast-math -funroll-loops -fomit-frame-pointer -fexpensive-optimizations"
case "${target}" in
changequote(,)dnl
   i[34567]86-*-linux-gnu*)
changequote([,])dnl
        case "${target_cpu}" in
          i486) GCC_EMULATION="-m486" ;;
          i586) GCC_EMULATION="-mpentium" ;;
          i686) GCC_EMULATION="-mpentiumpro" ;;
        esac
        MORE_RELEASE_CFLAGS="${GCC_EMULATION} -malign-loops=2 -malign-jumps=2 -malign-functions=2" ;;
   *) MORE_RELEASE_CFLAGS="" ;;
esac
if test "x$MORE_RELEASE_CFLAGS" = x; then
RELEASE_CFLAGS=-O
AC_MSG_RESULT([no - using standard flags])
RELEASE_CFLAGS=$BASE_RELEASE_CFLAGS
else
AC_MSG_RESULT(yes)
RELEASE_CFLAGS="$BASE_RELEASE_CFLAGS $MORE_RELEASE_CFALGS"
fi
else
RELEASE_CFLAGS=-O2
fi
fi
AC_SUBST(RELEASE_CFLAGS)

##########################################################
#
# is it an intel box?
#
AC_MSG_CHECKING(for an Intel machine)
case "${target}" in
changequote(,)dnl
   i[34567]86-*-linux-gnu*)
changequote([,])dnl
      INTEL_ARCH=yes
      AC_MSG_RESULT(yes)
          ;;
   *) AC_MSG_RESULT(no)
esac
AC_SUBST(INTEL_ARCH)

##########################################################
#
# CD audio available?
#
AC_MSG_CHECKING(for CD audio support)
case "${target}" in
changequote(,)dnl
   i[34567]86-*-linux-gnu*)
changequote([,])dnl
      CD_AUDIO_SRC="cd_linux.c" ;;
   *)
      CD_AUDIO_SRC="cd_null.c" ;;
esac
if test "x$CD_AUDIO_SRC" = xcd_null.c; then
AC_MSG_RESULT(no - using cd_null.c)
else
AC_MSG_RESULT(yes - $CD_AUDIO_SRC)
fi
AC_SUBST(CD_AUDIO_SRC)

##########################################################
#
# Sound available?
#
AC_MSG_CHECKING(for sound support)
case "${target}" in
changequote(,)dnl
   i[34567]86-*-linux-gnu*)
changequote([,])dnl
      SND_SRC="snd_dma.c snd_linux.c snd_mixa.s" ;;
   *-solaris*) 
      SND_SRC="snd_dma.c snd_sun.c" ;;
   *-sgi*)
      SND_SRC="snd_null.c" ;;
   *)
      SND_SRC="snd_null.c" ;;
# XXX - need to add dos, Windows
esac
if test "x$SND_SRC" = xsnd_null.c; then
AC_MSG_RESULT(no - using snd_null.c)
else
AC_MSG_RESULT(yes - $SND_SRC)
fi
AC_SUBST(SND_SRC)

##########################################################
#
# System driver?
#
AC_MSG_CHECKING(for system driver)
case "${target}" in
changequote(,)dnl
   i[34567]86-*-linux-gnu*)
changequote([,])dnl
      SYS_SRC="sys_linux.c"
      QW_CL_SYS_SRC="sys_linux.c"
      QW_SRV_SYS_SRC="sys_unix.c"
      ;;
   *-solaris*) 
      SYS_SRC="sys_sun.c"
      QW_CL_SYS_SRC="sys_linux.c"
      QW_SRV_SYS_SRC="sys_unix.c"
      ;;
   *)
      SYS_SRC="sys_sun.c" 
      QW_CL_SYS_SRC="sys_linux.c"
      QW_SRV_SYS_SRC="sys_unix.c"
      DEFAULT_SYS=yes ;;
# XXX - windows - conproc.c sys_win.c
# XXX - dos  - conproc.c(?) sys_dos.c
# XXX - need to add dos, Windows
esac
if test "x$DEFAULT_SYS" = xyes; then
AC_MSG_RESULT(no - using default)
else
AC_MSG_RESULT(yes - $SYS_SRC / $QW_SYS_SRC)
fi
AC_SUBST(SYS_SRC)
AC_SUBST(QW_CL_SYS_SRC)
AC_SUBST(QW_SRV_SYS_SRC)

##########################################################
#
# X11 video driver?
#
# If Solaris, use vid_sunx.c,
# otherwise (if X available) use vid_x.c
AC_MSG_CHECKING(for X11 video driver)
case "${target}" in
   *-solaris*) 
      X11_VID_SRC="vid_sunx.c" ;;
   *)
      if test "x$HAS_X11"; then
         X11_VID_SRC="vid_x.c";
      else
         X11_VID_SRC=
      fi
     ;;
esac
if test "x$X11_VID_SRC" = x; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes - $X11_VID_SRC)
fi
AC_SUBST(X11_VID_SRC)

dnl Check for system services
AC_EXEEXT
AC_OBJEXT
AC_PATH_XTRA

##########################################################
#
# make Makefile.header, Makefile.tail
#

AC_SUBST_FILE(MAKEFILE_HEADER)
MAKEFILE_HEADER=pre

AC_SUBST_FILE(MAKEFILE_TAIL)
MAKEFILE_TAIL=post

AC_SUBST_FILE(CLIENT_TARGETS)
CLIENT_TARGETS=client

AC_SUBST_FILE(SRCFILES)
SRCFILES=srcfiles

AC_SUBST_FILE(COMP_RULES)
COMP_RULES=rules

##########################################################
#
# Output files
#
AC_OUTPUT(pre post client srcfiles rules
          qw_client/Makefile qw_server/Makefile uquake/Makefile Makefile)