dnl Process this file with autoconf to produce a configure script.

AC_INIT(README.txt)

AC_CONFIG_HEADER(include/SDL_config.h)

AC_CONFIG_AUX_DIR(build-scripts)

AC_CONFIG_MACRO_DIR([acinclude])

dnl Save the CFLAGS to see whether they were passed in or generated

orig_CFLAGS="$CFLAGS"

dnl Set various version strings - taken gratefully from the GTk sources

#

# Making releases:

# Edit include/SDL_version.h and change the version, then:

#   SDL_MICRO_VERSION += 1;

#   SDL_INTERFACE_AGE += 1;

#   SDL_BINARY_AGE += 1;

# if any functions have been added, set SDL_INTERFACE_AGE to 0.

# if backwards compatibility has been broken,

# set SDL_BINARY_AGE and SDL_INTERFACE_AGE to 0.

#

SDL_MAJOR_VERSION=2

SDL_MINOR_VERSION=0

SDL_MICRO_VERSION=3

SDL_INTERFACE_AGE=1

SDL_BINARY_AGE=3

SDL_VERSION=$SDL_MAJOR_VERSION.$SDL_MINOR_VERSION.$SDL_MICRO_VERSION

AC_SUBST(SDL_MAJOR_VERSION)

AC_SUBST(SDL_MINOR_VERSION)

AC_SUBST(SDL_MICRO_VERSION)

AC_SUBST(SDL_INTERFACE_AGE)

AC_SUBST(SDL_BINARY_AGE)

AC_SUBST(SDL_VERSION)

# libtool versioning

LT_INIT([win32-dll])

LT_RELEASE=$SDL_MAJOR_VERSION.$SDL_MINOR_VERSION

LT_CURRENT=`expr $SDL_MICRO_VERSION - $SDL_INTERFACE_AGE`

LT_REVISION=$SDL_INTERFACE_AGE

LT_AGE=`expr $SDL_BINARY_AGE - $SDL_INTERFACE_AGE`

m4_pattern_allow([^LT_])

AC_SUBST(LT_RELEASE)

AC_SUBST(LT_CURRENT)

AC_SUBST(LT_REVISION)

AC_SUBST(LT_AGE)

dnl Detect the canonical build and host environments

dnl AC_CANONICAL_HOST

dnl Check for tools

AC_PROG_LIBTOOL

AC_PROG_CC

AC_PROG_CXX

AC_PROG_INSTALL

AC_PROG_MAKE_SET

AC_CHECK_TOOL(WINDRES, [windres], [:])

dnl Make sure that srcdir is a full pathname

case "$host" in

    *-*-mingw32*)

        # Except on msys, where make can't handle full pathnames (bug 1972)

        ;;

    *)

        srcdir=`cd $srcdir && pwd`

        ;;

esac

dnl Set up the compiler and linker flags

INCLUDE="-I$srcdir/include"

if test x$srcdir != x.; then

    INCLUDE="-Iinclude $INCLUDE"

elif test -d .hg; then

    AC_MSG_ERROR([

*** When building from Mercurial you should configure and build in a

    separate directory so you don't clobber SDL_config.h, SDL_revision.h

])

fi

BASE_CFLAGS=""

BASE_LDFLAGS=""

case "$host" in

    *-*-cygwin*)

        # We build SDL on cygwin without the UNIX emulation layer

        save_CFLAGS="$CFLAGS"

        have_no_cygwin=no

        AC_MSG_CHECKING(for GCC -mno-cygwin option)

        CFLAGS="$save_CFLAGS -mno-cygwin"

        AC_TRY_COMPILE([

        ],[

        ],[

        have_no_cygwin=yes

        ])

        AC_MSG_RESULT($have_no_cygwin)

        CFLAGS="$save_CFLAGS"

        if test x$have_no_cygwin = xyes; then

            BASE_CFLAGS="-mno-cygwin"

            BASE_LDFLAGS="-mno-cygwin"

        fi

        BASE_CFLAGS="$BASE_CFLAGS -I/usr/include/mingw"

        ;;

esac

# Uncomment the following line if you want to force SDL and applications

# built with it to be compiled for a particular architecture.

#AX_GCC_ARCHFLAG([no], [BASE_CFLAGS="$BASE_CFLAGS $ax_cv_gcc_archflag]")

BUILD_CFLAGS="$CFLAGS $CPPFLAGS -DUSING_GENERATED_CONFIG_H"

# The default optimization for SDL is -O3 (Bug #31)

if test "x$orig_CFLAGS" = x; then

    BUILD_CFLAGS=`echo $BUILD_CFLAGS | sed 's/-O2/-O3/'`

fi

EXTRA_CFLAGS="$INCLUDE $BASE_CFLAGS"

BUILD_LDFLAGS="$LDFLAGS"

EXTRA_LDFLAGS="$BASE_LDFLAGS"

## These are common directories to find software packages

#for path in /usr/freeware /usr/pkg /usr/X11R6 /usr/local; do

#    if test -d $path/include; then

#        EXTRA_CFLAGS="$EXTRA_CFLAGS -I$path/include"

#    fi

#    if test -d $path/lib; then

#        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$path/lib"

#    fi

#done

SDL_CFLAGS="$BASE_CFLAGS"

SDL_LIBS="-lSDL2 $BASE_LDFLAGS"

CPPFLAGS="$CPPFLAGS $EXTRA_CFLAGS"

CFLAGS="$CFLAGS $EXTRA_CFLAGS"

LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS"

dnl set this to use on systems that use lib64 instead of lib

base_libdir=`echo \${libdir} | sed 's/.*\/\(.*\)/\1/; q'`

dnl Function to find a library in the compiler search path

find_lib()

{

    gcc_bin_path=[`$CC -print-search-dirs 2>/dev/null | fgrep programs: | sed 's/[^=]*=\(.*\)/\1/' | sed 's/:/ /g'`]

    gcc_lib_path=[`$CC -print-search-dirs 2>/dev/null | fgrep libraries: | sed 's/[^=]*=\(.*\)/\1/' | sed 's/:/ /g'`]

    env_lib_path=[`echo $LIBS $LDFLAGS $* | sed 's/-L[ ]*//g'`]

    if test "$cross_compiling" = yes; then

        host_lib_path=""

    else

        host_lib_path="/usr/$base_libdir /usr/local/$base_libdir"

    fi

    for path in $gcc_bin_path $gcc_lib_path $env_lib_path $host_lib_path; do

        lib=[`ls -- $path/$1 2>/dev/null | sed -e '/\.so\..*\./d' -e 's,.*/,,' | sort | tail -1`]

        if test x$lib != x; then

            echo $lib

            return

        fi

    done

}

dnl Check for compiler characteristics

AC_C_CONST

AC_C_INLINE

AC_C_VOLATILE

dnl See whether we want assertions for debugging/sanity checking SDL itself.

AC_ARG_ENABLE(assertions,

AC_HELP_STRING([--enable-assertions],

               [Enable internal sanity checks (auto/disabled/release/enabled/paranoid) [[default=auto]]]),

              , enable_assertions=auto)

case "$enable_assertions" in

    auto) # Use optimization settings to determine assertion level

        ;;

    disabled)

        AC_DEFINE(SDL_DEFAULT_ASSERT_LEVEL, 0, [ ])

        ;;

    release)

        AC_DEFINE(SDL_DEFAULT_ASSERT_LEVEL, 1, [ ])

        ;;

    enabled)

        AC_DEFINE(SDL_DEFAULT_ASSERT_LEVEL, 2, [ ])

        ;;

    paranoid)

        AC_DEFINE(SDL_DEFAULT_ASSERT_LEVEL, 3, [ ])

        ;;

    *)

        AC_MSG_ERROR([*** unknown assertion level. stop.])

        ;;

esac

dnl See whether we can use gcc style dependency tracking

AC_ARG_ENABLE(dependency-tracking,

AC_HELP_STRING([--enable-dependency-tracking],

               [Use gcc -MMD -MT dependency tracking [[default=yes]]]),

              , enable_dependency_tracking=yes)

if test x$enable_dependency_tracking = xyes; then

    have_gcc_mmd_mt=no

    AC_MSG_CHECKING(for GCC -MMD -MT option)

    AC_TRY_COMPILE([

    #if !defined(__GNUC__) || __GNUC__ < 3

    #error Dependency tracking requires GCC 3.0 or newer

    #endif

    ],[

    ],[

    have_gcc_mmd_mt=yes

    ])

    AC_MSG_RESULT($have_gcc_mmd_mt)

    if test x$have_gcc_mmd_mt = xyes; then

        DEPENDENCY_TRACKING_OPTIONS="-MMD -MT \$@"

    fi

fi

AC_MSG_CHECKING(for linker option --no-undefined)

have_no_undefined=no

case "$host" in

    dnl Skip this on platforms where it is just simply busted.

    *-*-openbsd*)

        ;;

    *)

        save_LDFLAGS="$LDFLAGS"

        LDFLAGS="$LDFLAGS -Wl,--no-undefined"

        AC_TRY_LINK([

        ],[

        ],[

        have_no_undefined=yes

        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,--no-undefined"

        ])

        LDFLAGS="$save_LDFLAGS"

        ;;

esac

AC_MSG_RESULT($have_no_undefined)

dnl See whether we are allowed to use the system C library

AC_ARG_ENABLE(libc,

AC_HELP_STRING([--enable-libc], [Use the system C library [[default=yes]]]),

              , enable_libc=yes)

if test x$enable_libc = xyes; then

    AC_DEFINE(HAVE_LIBC, 1, [ ])

    dnl Check for C library headers

    AC_HEADER_STDC

    AC_CHECK_HEADERS(sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h inttypes.h stdint.h ctype.h math.h iconv.h signal.h)

    dnl Check for typedefs, structures, etc.

    AC_TYPE_SIZE_T

    dnl Check for defines

    AC_CHECK_DEFINE(M_PI, math.h)

    dnl Checks for library functions.

    case "$host" in

    *-*-cygwin* | *-*-mingw32*)

        ;;

    *)

        AC_FUNC_ALLOCA

        ;;

    esac

    AC_FUNC_MEMCMP

    if test x$ac_cv_func_memcmp_working = xyes; then

        AC_DEFINE(HAVE_MEMCMP, 1, [ ])

    fi

    AC_FUNC_STRTOD

    if test x$ac_cv_func_strtod = xyes; then

        AC_DEFINE(HAVE_STRTOD, 1, [ ])

    fi

    AC_CHECK_FUNC(mprotect,

        AC_TRY_COMPILE([

          #include <sys/types.h>

          #include <sys/mman.h>

        ],[

        ],[

        AC_DEFINE(HAVE_MPROTECT, 1, [ ])

        ]),

    )

    AC_CHECK_FUNCS(malloc calloc realloc free getenv setenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp vsscanf vsnprintf fseeko fseeko64 sigaction setjmp nanosleep sysconf sysctlbyname)

    AC_CHECK_LIB(m, pow, [LIBS="$LIBS -lm"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"])

    AC_CHECK_FUNCS(atan atan2 acos asin ceil copysign cos cosf fabs floor log pow scalbn sin sinf sqrt)

    AC_CHECK_LIB(iconv, iconv_open, [LIBS="$LIBS -liconv"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -liconv"])

    AC_CHECK_FUNCS(iconv)

    AC_CHECK_MEMBER(struct sigaction.sa_sigaction,[AC_DEFINE(HAVE_SA_SIGACTION)], ,[#include <signal.h>])

fi

dnl AC_CHECK_SIZEOF(void*)

dnl See whether we can use gcc atomic operations on this architecture

AC_ARG_ENABLE(gcc-atomics,

AC_HELP_STRING([--enable-gcc-atomics],

               [Use gcc builtin atomics [[default=yes]]]),

              , enable_gcc_atomics=yes)

if test x$enable_gcc_atomics = xyes; then

    have_gcc_atomics=no

    AC_MSG_CHECKING(for GCC builtin atomic operations)

    AC_TRY_LINK([

    ],[

    int a;

    void *x, *y, *z;

    __sync_lock_test_and_set(&a, 4);

    __sync_lock_test_and_set(&x, y);

    __sync_fetch_and_add(&a, 1);

    __sync_bool_compare_and_swap(&a, 5, 10);

    __sync_bool_compare_and_swap(&x, y, z);

    ],[

    have_gcc_atomics=yes

    ])

    AC_MSG_RESULT($have_gcc_atomics)

    if test x$have_gcc_atomics = xyes; then

        AC_DEFINE(HAVE_GCC_ATOMICS, 1, [ ])

    else

        # See if we have the minimum operation needed for GCC atomics

        AC_TRY_LINK([

        ],[

        int a;

        __sync_lock_test_and_set(&a, 1);

        __sync_lock_release(&a);

        ],[

        have_gcc_sync_lock_test_and_set=yes

        ])

        if test x$have_gcc_sync_lock_test_and_set = xyes; then

            AC_DEFINE(HAVE_GCC_SYNC_LOCK_TEST_AND_SET, 1, [ ])

        fi

    fi

fi

# Standard C sources

SOURCES="$SOURCES $srcdir/src/*.c"

SOURCES="$SOURCES $srcdir/src/atomic/*.c"

SOURCES="$SOURCES $srcdir/src/audio/*.c"

SOURCES="$SOURCES $srcdir/src/cpuinfo/*.c"

SOURCES="$SOURCES $srcdir/src/dynapi/*.c"

SOURCES="$SOURCES $srcdir/src/events/*.c"

SOURCES="$SOURCES $srcdir/src/file/*.c"

SOURCES="$SOURCES $srcdir/src/haptic/*.c"

SOURCES="$SOURCES $srcdir/src/joystick/*.c"

SOURCES="$SOURCES $srcdir/src/libm/*.c"

SOURCES="$SOURCES $srcdir/src/power/*.c"

#SOURCES="$SOURCES $srcdir/src/filesystem/*.c"

SOURCES="$SOURCES $srcdir/src/render/*.c"

SOURCES="$SOURCES $srcdir/src/render/*/*.c"

SOURCES="$SOURCES $srcdir/src/stdlib/*.c"

SOURCES="$SOURCES $srcdir/src/thread/*.c"

SOURCES="$SOURCES $srcdir/src/timer/*.c"

SOURCES="$SOURCES $srcdir/src/video/*.c"

dnl Enable/disable various subsystems of the SDL library

AC_ARG_ENABLE(atomic,

AC_HELP_STRING([--enable-atomic], [Enable the atomic operations subsystem [[default=yes]]]),

              , enable_atomic=yes)

if test x$enable_atomic != xyes; then

    AC_DEFINE(SDL_ATOMIC_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} atomic"

fi

AC_ARG_ENABLE(audio,

AC_HELP_STRING([--enable-audio], [Enable the audio subsystem [[default=yes]]]),

              , enable_audio=yes)

if test x$enable_audio != xyes; then

    AC_DEFINE(SDL_AUDIO_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} audio"

fi

AC_ARG_ENABLE(video,

AC_HELP_STRING([--enable-video], [Enable the video subsystem [[default=yes]]]),

              , enable_video=yes)

if test x$enable_video != xyes; then

    AC_DEFINE(SDL_VIDEO_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} video"

fi

AC_ARG_ENABLE(render,

AC_HELP_STRING([--enable-render], [Enable the render subsystem [[default=yes]]]),

              , enable_render=yes)

if test x$enable_render != xyes; then

    AC_DEFINE(SDL_RENDER_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} render"

fi

AC_ARG_ENABLE(events,

AC_HELP_STRING([--enable-events], [Enable the events subsystem [[default=yes]]]),

              , enable_events=yes)

if test x$enable_events != xyes; then

    AC_DEFINE(SDL_EVENTS_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} events"

fi

AC_ARG_ENABLE(joystick,

AC_HELP_STRING([--enable-joystick], [Enable the joystick subsystem [[default=yes]]]),

              , enable_joystick=yes)

if test x$enable_joystick != xyes; then

    AC_DEFINE(SDL_JOYSTICK_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} joystick"

fi

AC_ARG_ENABLE(haptic,

AC_HELP_STRING([--enable-haptic], [Enable the haptic (force feedback) subsystem [[default=yes]]]),

              , enable_haptic=yes)

if test x$enable_haptic != xyes; then

    AC_DEFINE(SDL_HAPTIC_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} haptic"

fi

AC_ARG_ENABLE(power,

AC_HELP_STRING([--enable-power], [Enable the power subsystem [[default=yes]]]),

              , enable_power=yes)

if test x$enable_power != xyes; then

    AC_DEFINE(SDL_POWER_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} power"

fi

AC_ARG_ENABLE(filesystem,

AC_HELP_STRING([--enable-filesystem], [Enable the filesystem subsystem [[default=yes]]]),

              , enable_filesystem=yes)

if test x$enable_filesystem != xyes; then

    AC_DEFINE(SDL_FILESYSTEM_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} filesystem"

fi

AC_ARG_ENABLE(threads,

AC_HELP_STRING([--enable-threads], [Enable the threading subsystem [[default=yes]]]),

              , enable_threads=yes)

if test x$enable_threads != xyes; then

    AC_DEFINE(SDL_THREADS_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} threads"

fi

AC_ARG_ENABLE(timers,

AC_HELP_STRING([--enable-timers], [Enable the timer subsystem [[default=yes]]]),

              , enable_timers=yes)

if test x$enable_timers != xyes; then

    AC_DEFINE(SDL_TIMERS_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} timers"

fi

AC_ARG_ENABLE(file,

AC_HELP_STRING([--enable-file], [Enable the file subsystem [[default=yes]]]),

              , enable_file=yes)

if test x$enable_file != xyes; then

    AC_DEFINE(SDL_FILE_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} file"

fi

AC_ARG_ENABLE(loadso,

AC_HELP_STRING([--enable-loadso], [Enable the shared object loading subsystem [[default=yes]]]),

              , enable_loadso=yes)

if test x$enable_loadso != xyes; then

    AC_DEFINE(SDL_LOADSO_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} loadso"

fi

AC_ARG_ENABLE(cpuinfo,

AC_HELP_STRING([--enable-cpuinfo], [Enable the cpuinfo subsystem [[default=yes]]]),

              , enable_cpuinfo=yes)

if test x$enable_cpuinfo != xyes; then

    AC_DEFINE(SDL_CPUINFO_DISABLED, 1, [ ])

else

    SUMMARY_modules="${SUMMARY_modules} cpuinfo"

fi

AC_ARG_ENABLE(assembly,

AC_HELP_STRING([--enable-assembly], [Enable assembly routines [[default=yes]]]),

              , enable_assembly=yes)

if test x$enable_assembly = xyes; then

    SUMMARY_modules="${SUMMARY_modules} assembly"

    AC_DEFINE(SDL_ASSEMBLY_ROUTINES, 1, [ ])

    # Make sure that we don't generate floating point code that would

    # cause illegal instruction exceptions on older processors

    case "$host" in

        *-*-darwin*)

            # Don't need to worry about Apple hardware, it's all SSE capable

            default_ssemath=yes

            ;;

        *64-*-*)

            # x86 64-bit architectures all have SSE instructions

            default_ssemath=yes

            ;;

        *)

            default_ssemath=no

            ;;

    esac

    AC_ARG_ENABLE(ssemath,

AC_HELP_STRING([--enable-ssemath], [Allow GCC to use SSE floating point math [[default=no]]]),

                  , enable_ssemath=$default_ssemath)

    if test x$enable_ssemath = xno; then

        if test x$have_gcc_sse = xyes -o x$have_gcc_sse2 = xyes; then

            EXTRA_CFLAGS="$EXTRA_CFLAGS -mfpmath=387"