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由 John Bowler 提交于
FLOATING_POINT options were switched off, png.h ended up with lone ';' characters. This is not valid ANSI-C outside a function. The ';' characters have been moved inside the definition of PNG_FP_EXPORT and PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration of the corresponding functions were completely omitted, even though some of them are still used internally. The result is still valid, but produces warnings from gcc with some warning options (including -Wall). The fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION when png.h is included from pngpriv.h.
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