dnl AC_INIT does not take a macro as a version nr: set it separately! - Bram
AC_INIT([ODE],[0.11.1],[ode@ode.org])
# AC_CONFIG_SRCDIR([ode/src/ode.cpp])
ODE_RELEASE=0.11.1
AC_SUBST(ODE_RELEASE)

# Those are instructions from the Libtool manual:
#  1. Start with version information of `0:0:0' for each libtool library.
#
#  2. Update the version information only immediately before a public
#     release of your software.  More frequent updates are unnecessary,
#     and only guarantee that the current interface number gets larger
#     faster.
#
#  3. If the library source code has changed at all since the last
#     update, then increment REVISION (`C:R:A' becomes `C:r+1:A').
#
#  4. If any interfaces have been added, removed, or changed since the
#     last update, increment CURRENT, and set REVISION to 0.
#
#  5. If any interfaces have been added since the last public release,
#     then increment AGE.
#
#  6. If any interfaces have been removed since the last public release,
#     then set AGE to 0.
CURRENT=2
REVISION=1
AGE=1

AC_ARG_ENABLE(version-info,
        AS_HELP_STRING([--disable-version-info],
                [don't encode version information in the generated library]),
        version_info=$enableval,
        version_info=yes)
if test x$version_info = xyes
then
    ODE_VERSION_INFO="-version-info $CURRENT:$REVISION:$AGE"
else
    ODE_VERSION_INFO="-avoid-version"
fi
AC_SUBST(ODE_VERSION_INFO)



AC_CANONICAL_HOST

AM_INIT_AUTOMAKE(1.10 foreign)
AC_CONFIG_HEADERS([ode/src/config.h])

dnl This is needed because we have subdirectories
AC_PROG_MAKE_SET
AC_PROG_CXX
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MKDIR_P
AC_DISABLE_SHARED
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AC_CHECK_TOOLS([WINDRES], [windres])

AC_C_BIGENDIAN
AC_C_INLINE
AC_C_VOLATILE
AC_HEADER_STDBOOL
AC_TYPE_SIZE_T

dnl Check if we want to build demos
AC_MSG_CHECKING(if demos should be built)
AC_ARG_ENABLE(demos,
        AS_HELP_STRING([--disable-demos], [don't build demos]),
        enable_demos=$enableval,enable_demos=yes)
AC_MSG_RESULT($enable_demos)



dnl this may NOT be the machine on which the code is going to run in,
dnl so allow users to compile programs for their target machine.
pentium=no
cpu64=no
case "$host_cpu" in
  i586 | i686 | i786 )
        pentium=yes
        AC_DEFINE(PENTIUM,1,[compiling for a pentium on a gcc-based platform?])
    ;;
  x86_64* )
        pentium=yes
        cpu64=yes
        AC_DEFINE(X86_64_SYSTEM,1,[compiling for a X86_64 system on a gcc-based platform?])
    ;;
esac

AM_CONDITIONAL(X86_64_SYSTEM, test x$cpu64 = xyes)






dnl check for required headers
AC_CHECK_HEADERS( alloca.h stdio.h stdint.h stdlib.h math.h string.h stdarg.h malloc.h float.h time.h sys/time.h )


opcode=no
gimpact=no
AC_ARG_WITH(trimesh, AS_HELP_STRING([--with-trimesh=[opcode|gimpact|none]],
        [use the specified system for trimesh support @<:@default=opcode@:>@]),
        trimesh=$withval,trimesh=opcode
)
if test "$trimesh" = opcode
then
  opcode=yes
fi
if test "$trimesh" = gimpact
then
  gimpact=yes
fi

AM_CONDITIONAL(OPCODE,  test $opcode  = yes)
AM_CONDITIONAL(GIMPACT, test $gimpact = yes)
AM_CONDITIONAL(TRIMESH, test $opcode = yes -o $gimpact = yes)


AC_MSG_CHECKING(if double precision is requested)
AC_ARG_ENABLE(double-precision,
        AS_HELP_STRING([--enable-double-precision],
        [Configure ODE to work with double precision, if not specified, single precision is used]
        ),
        precision=$enableval,precision=no)
AC_MSG_RESULT([$precision])
if test "$precision" = yes;
then
        ODE_PRECISION=-DdDOUBLE
else
        ODE_PRECISION=-DdSINGLE
fi

CPPFLAGS+=" $ODE_PRECISION"
AC_SUBST(ODE_PRECISION)


AC_ARG_WITH([drawstuff],AS_HELP_STRING([--with-drawstuff=X11|Win32|OSX|none],[force a particular drawstuff implementation or disable it.]),
        [drawstuff=$withval],[drawstuff=])

dnl Set some Platform Specific Variables
EXTRA_LIBTOOL_LDFLAGS=
case "$host_os" in
  cygwin* | mingw*)
    if test x"$drawstuff" = x
    then
       drawstuff="Win32" # if in a Windows enviroment
    fi
    EXTRA_LIBTOOL_LDFLAGS="-no-undefined"
    ;;
  *apple* | *darwin*) # For Mac OS X
    if test x"$drawstuff" = x
    then
       drawstuff="OSX"
    fi
    dnl We need to use C++ compilation and linking for ode on Mac
    dnl Might as well do it for all code.
    CC="$CXX"
    LINK="$CXXLINK"
    ;;
  *)
    if test x"$drawstuff" = x
    then
       drawstuff="X11" # if anything else default to X11
    fi
    ;;
esac
AC_SUBST(EXTRA_LIBTOOL_LDFLAGS)
AM_CONDITIONAL(ENABLE_DRAWSTUFF, test x$drawstuff != xnone)


dnl Set Conditionals
AM_CONDITIONAL(WIN32, test x$drawstuff = xWin32)
AM_CONDITIONAL(X11, test x$drawstuff = xX11)
AM_CONDITIONAL(OSX, test x$drawstuff = xOSX)
dnl Set Drawstuff variables
AC_MSG_CHECKING(which drawstuff lib to build)
AC_MSG_RESULT($drawstuff)

if test "x$drawstuff" = "xX11"
then
    AC_PATH_XTRA
fi

dnl Check for OpenGL
if test "x$drawstuff" = "xOSX"; then
  AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1],
            [Use the Apple OpenGL framework.])
  GL_LIBS="-framework OpenGL -framework Carbon -framework AGL"
else
  have_gl_headers=yes
  AC_CHECK_HEADERS(GL/gl.h GL/glu.h GL/glext.h, ,
        [have_gl_headers=no],
       [[#ifdef WIN32
         #include <windows.h>
         #endif
         #if HAVE_GL_GL_H
         #include <GL/gl.h>
         #endif
  	     #if HAVE_GL_GLU_H
         #include <GL/glu.h>
         #endif
       ]])
  have_gl=no
  have_glu=no
  TEMP_LDFLAGS="$LDFLAGS"
  AC_CHECK_LIB(GL, main, [GL_LIBS="-lGL"; have_gl=yes])
  AC_CHECK_LIB(GLU, main, [GL_LIBS="-lGLU $GL_LIBS"; have_glu=yes], , -lGL)
  AC_CHECK_LIB(opengl32, main, [GL_LIBS="-lopengl32"; have_gl=yes])
  AC_CHECK_LIB(glu32, main, [GL_LIBS="-lglu32 $GL_LIBS"; have_glu=yes], , -lopengl32)
  LDFLAGS="$TEMP_LDFLAGS"
  if test $have_gl = no -o $have_glu = no -o $have_gl_headers = no; then
    if test x$enable_demos = xyes; then
      AC_MSG_WARN([Demos will not be built because OpenGL doesn't seem to work. See `config.log' for details.])
    fi
    enable_demos=no
  fi
fi
AC_SUBST(GL_LIBS)


dnl stdc++ is required when linking C programs against ode
AC_CHECK_LIB(stdc++,main,[LIBSTDCXX="-lstdc++"],[LIBSTDCXX=])
AC_SUBST(LIBSTDCXX)
AC_CHECK_LIB(pthread,main,[LIBS="$LIBS -lpthread"])


dnl test if we will build demos
AM_CONDITIONAL(ENABLE_DEMOS, test x$enable_demos = xyes)


dnl Check if the user wants the old timesh collider
old_trimesh=no
AC_ARG_ENABLE([old-trimesh], AS_HELP_STRING([--enable-old-trimesh],[enable use of the old trimesh collider]),
        [old_trimesh=$enableval]
        )
if test x$old_trimesh = xyes -a $trimesh = opcode; then
        AC_DEFINE(dTRIMESH_OPCODE_USE_OLD_TRIMESH_TRIMESH_COLLIDER, 1,
                [Use the old trimesh-trimesh collider])
else
        old_trimesh=no
fi


dnl Check if the user wants to profile ODE using gprof
AC_MSG_CHECKING(for gprof)
AC_ARG_ENABLE([gprof],
        AS_HELP_STRING([--enable-gprof],[enable profiling with gprof]),
        gprof=$enableval,
        gprof=no)
if test "$gprof" != no
then
    CFLAGS="-pg $CFLAGS"
    CXXFLAGS="-pg $CXXFLAGS"
    AC_MSG_RESULT(enabled)
    AC_CHECK_LIB(gmon, main,[LIBS="$LIBS -lgmon"])
else
    AC_MSG_RESULT(no)
fi

dnl Check for autoscan sugested functions
AC_CHECK_LIB(m, [main])
AC_CHECK_LIB(sunmath, [main])
AC_CHECK_FUNCS([floor memmove memset select sqrt sqrtf sinf cosf fabsf atan2f fmodf copysignf copysign snprintf vsnprintf gettimeofday isnan isnanf _isnan _isnanf __isnan __isnanf])
AC_FUNC_ALLOCA 
AC_FUNC_MALLOC
AC_FUNC_OBSTACK 
AC_FUNC_REALLOC
AC_FUNC_SELECT_ARGTYPES
AC_FUNC_VPRINTF

AC_MSG_CHECKING(if alloca should be emulated by malloc)
AC_ARG_ENABLE([malloc],
        AS_HELP_STRING([--enable-malloc],
            [use malloc to emulate alloca (more portable but slower)]
        ),
        usemalloc=$enableval, usemalloc=no)
if test "$usemalloc" != no
then
    AC_DEFINE([dUSE_MALLOC_FOR_ALLOCA],[1],[use malloc() instead of alloca()])
    AC_MSG_RESULT($usemalloc)
else
    AC_MSG_RESULT(no)
fi

AC_ARG_ENABLE([ou],
        AS_HELP_STRING([--enable-ou],
            [EXPERIMENTAL: use TLS for global variables to allow for running ODE in multiple threads simultaneously]
        ),
        use_ou=$enableval,use_ou=no)
if test x$use_ou = xyes
then
    OU_NAMESPACE=odeou
    AC_CONFIG_COMMANDS_POST([export OU_NAMESPACE=odeou])
    AC_DEFINE([_OU_NAMESPACE],[odeou],[libou namespace for ODE])
    AC_DEFINE([dOU_ENABLED],[1],[Generic OU features are enabled])
    AC_DEFINE([dATOMICS_ENABLED],[1],[Atomic API of OU is enabled])
    AC_DEFINE([dTLS_ENABLED],[1],[Thread Local Storage API of OU is enabled])

    case "$host_os" in
      cygwin* | mingw*)
        targetos=_OU_TARGET_OS_WINDOWS
        ;;
      *qnx*)
        targetos=_OU_TARGET_OS_QNX
        ;;
      *apple* | *darwin*)
        targetos=_OU_TARGET_OS_MAC
        ;;
      *sunos*)
        targetos=_OU_TARGET_OS_SUNOS
        ;;
      *aix*)
        targetos=_OU_TARGET_OS_AIX
        ;;
      *)
        targetos=_OU_TARGET_OS_GENUNIX
        ;;
    esac

    if test $targetos = _OU_TARGET_OS_MAC
    then
        MAC_OS_X_VERSION=1000
        AC_CHECK_FUNC([OSAtomicAdd32Barrier], [MAC_OS_X_VERSION=1040])
        AC_CHECK_FUNC([OSAtomicAnd32OrigBarrier], [MAC_OS_X_VERSION=1050])
        AC_DEFINE_UNQUOTED(MAC_OS_X_VERSION, $MAC_OS_X_VERSION, [Mac OS X version setting for OU Library])
    fi
    
    if test $targetos = _OU_TARGET_OS_SUNOS
    then
        AC_CHECK_FUNC(atomic_inc_32_nv, [],
            [targetos=_OU_TARGET_OS_GENUNIX])
    fi
    
    AC_DEFINE_UNQUOTED(_OU_TARGET_OS, $targetos, [Target OS setting for OU Library])
fi
AC_CONFIG_SUBDIRS([ou])
AM_CONDITIONAL(ENABLE_OU, test x$use_ou = xyes)


AC_ARG_ENABLE([asserts],
        AS_HELP_STRING([--disable-asserts],
            [disables debug error checking]),
        asserts=$enableval,asserts=yes)
if test x$asserts = xno
then
    CPPFLAGS="$CPPFLAGS -DdNODEBUG"
    if test x$use_ou = xyes
    then
        CPPFLAGS="$CPPFLAGS -DNDEBUG"
    fi
fi


dnl include found system headers into config.h
AH_TOP([
#ifndef ODE_CONFIG_H
#define ODE_CONFIG_H
])
AH_BOTTOM([

#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif

/* an integer type that we can safely cast a pointer to and
 * from without loss of bits.
 */
typedef uintptr_t intP;


// Use the error-checking memory allocation system.  Because this system uses heap
//  (malloc) instead of stack (alloca), it is slower.  However, it allows you to
//  simulate larger scenes, as well as handle out-of-memory errors in a somewhat
//  graceful manner

#ifdef dUSE_MALLOC_FOR_ALLOCA
enum {
  d_MEMORY_OK = 0,              /* no memory errors */
  d_MEMORY_OUT_OF_MEMORY        /* malloc failed due to out of memory error */
};
#endif

#ifdef dSINGLE
       #define dEpsilon  FLT_EPSILON
#else
       #define dEpsilon  DBL_EPSILON
#endif


#endif /* #define ODE_CONFIG_H */
])

dnl Finally write our Makefiles
AC_CONFIG_FILES([
 Makefile
 include/Makefile
 include/ode/Makefile
 include/drawstuff/Makefile
 ode/Makefile
 ode/src/Makefile
 ode/src/joints/Makefile
 drawstuff/Makefile
 drawstuff/src/Makefile
 drawstuff/dstest/Makefile
 ode/demo/Makefile
 OPCODE/Makefile
 OPCODE/Ice/Makefile
 GIMPACT/Makefile
 GIMPACT/include/Makefile
 GIMPACT/include/GIMPACT/Makefile
 GIMPACT/src/Makefile
 tests/Makefile
 tests/UnitTest++/Makefile
 tests/UnitTest++/src/Makefile
 tests/UnitTest++/src/Posix/Makefile
 tests/UnitTest++/src/Win32/Makefile
 ode-config
 ode.pc
 ])
AC_OUTPUT

chmod +x ode-config

BUILDDIR=`pwd`

dnl Print some useful information
echo "Configuration:"
echo "  Build  system type:      $build"
echo "  Host   system type:      $host"
echo "  Use double precision:    $precision"
echo "  Use drawstuff:           $drawstuff"
echo "  Demos enabled:           $enable_demos"
echo "  Use OPCODE:              $opcode"
echo "  Use GIMPACT:             $gimpact"
echo "  Is target a Pentium:     $pentium"
echo "  Is target x86-64:        $cpu64"
echo "  Use old opcode trimesh collider: $old_trimesh"
echo "  TLS for global data:     $use_ou"
echo "  Enable debug error check: $asserts"
echo "  Headers will be installed in $includedir/ode"
echo "  Libraries will be installed in $libdir"
echo "  Building in directory    $BUILDDIR"