+ if test -z "$with_png"; then
+ AC_MSG_CHECKING(for workable png version information)
+ xe_check_libs="-lpng -lz"
+ AC_TRY_RUN([#include <png.h>
+ int main(int c, char **v) {
+ if (c == 1) return 0;
+ if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING) != 0) return 1;
+ return (PNG_LIBPNG_VER < 10002) ? 2 : 0 ;}],
+ [./conftest dummy_arg; png_status=$?;
+ if test "$png_status" = "0"; then
+ with_png=yes;
+ else
+ with_png=no;
+ if test "$png_status" = "1"; then
+ png_problem="PNG library version and header file don't match!"
+ elif test "$png_status" = "2"; then
+ png_problem="PNG library version too old (pre 1.0.2)!"
+ fi
+ echo "
+*** WARNING *** $png_problem
+ I'm not touching that with a 10-foot pole!
+ If you really want to use the installed version of libPNG, rerun
+ configure and add '--with-png=yes', but don't blame me if XEmacs crashes!"
+ fi],
+ [with_png=no])
+ xe_check_libs=
+ AC_MSG_RESULT($with_png)
+ fi