diff options
Diffstat (limited to 'pngpriv.h')
| -rw-r--r-- | pngpriv.h | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -694,6 +694,24 @@ #include "pngstruct.h" #include "pnginfo.h" +/* Validate the include paths - the include path used to generate pnglibconf.h + * must match that used in the build, or we must be using pnglibconf.h.prebuilt: + */ +#if PNG_ZLIB_VERNUM != 0 && PNG_ZLIB_VERNUM != ZLIB_VERNUM +# error ZLIB_VERNUM != PNG_ZLIB_VERNUM \ + "-I (include path) error: see the notes in pngpriv.h" + /* This means that when pnglibconf.h was built the copy of zlib.h that it + * used is not the same as the one being used here. Because the build of + * libpng makes decisions to use inflateInit2 and inflateReset2 based on the + * zlib version number and because this affects handling of certain broken + * PNG files the -I directives must match. + * + * The most likely explanation is that you passed a -I in CFLAGS, this will + * not work; all the preprocessor directories and in particular all the -I + * directives must be in CPPFLAGS. + */ +#endif + /* This is used for 16 bit gamma tables -- only the top level pointers are * const; this could be changed: */ |