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if test -n "$png_LIBS"; then
    pkg_cv_png_LIBS="$png_LIBS"
 elif test -n "$PKG_CONFIG"; then
    if test -n "$PKG_CONFIG" && \
    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\"libpng\"\""; } >&5
  ($PKG_CONFIG --exists --print-errors ""libpng"") 2>&5
  ac_status=$?
  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; then
  pkg_cv_png_LIBS=`$PKG_CONFIG --libs ""libpng"" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes
else
  pkg_failed=yes
fi
 else
    pkg_failed=untried
fi



if test $pkg_failed = yes; then
   	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }

if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
        _pkg_short_errors_supported=yes
else
        _pkg_short_errors_supported=no
fi
        if test $_pkg_short_errors_supported = yes; then
	        png_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs ""libpng"" 2>&1`
        else
	        png_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs ""libpng"" 2>&1`
        fi
	# Put the nasty error message in config.log where it belongs
	echo "$png_PKG_ERRORS" >&5

	as_fn_error $? "Package requirements (\"libpng\") were not met:

$png_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables png_CFLAGS
and png_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details." "$LINENO" 5
elif test $pkg_failed = untried; then
     	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error $? "The pkg-config script could not be found or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

Alternatively, you may set the environment variables png_CFLAGS
and png_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

To get pkg-config, see <http://pkg-config.freedesktop.org/>.
See \`config.log' for more details" "$LINENO" 5; }
else
	png_CFLAGS=$pkg_cv_png_CFLAGS
	png_LIBS=$pkg_cv_png_LIBS
        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }

fi
fi


# Check whether --with-tests was given.
if test "${with_tests+set}" = set; then :
  withval=$with_tests; build_tests=$withval
else
  build_tests=no
fi


 if test "x$build_tests" = "xyes" ; then
  BUILD_TESTS_TRUE=
  BUILD_TESTS_FALSE='#'
else
  BUILD_TESTS_TRUE='#'
  BUILD_TESTS_FALSE=
fi


if test x$build_tests = xyes ; then
echo "#define __STATIC" >>confdefs.h
echo "#define WITH_TESTS 1" >>confdefs.h
else
echo "#define __STATIC static" >>confdefs.h
echo "/* #undef WITH_TESTS */" >>confdefs.h
fi

if test x$build_tests = xyes ; then
	SDL_REQUIRED_VERSION=1.2.0

# Check whether --with-sdl-prefix was given.
if test "${with_sdl_prefix+set}" = set; then :
  withval=$with_sdl_prefix; sdl_prefix="$withval"
else
  sdl_prefix=""
fi


# Check whether --with-sdl-exec-prefix was given.
if test "${with_sdl_exec_prefix+set}" = set; then :
  withval=$with_sdl_exec_prefix; sdl_exec_prefix="$withval"
else
  sdl_exec_prefix=""
fi

# Check whether --enable-sdltest was given.
if test "${enable_sdltest+set}" = set; then :
  enableval=$enable_sdltest;
else
  enable_sdltest=yes
fi