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Philippe Gerum authored
Depending on the uClibc-specific, internal __STDIO_PUTC_MACRO for detecting macro-ized *putc* services is non-portable, unlikely to work with MUSL libc or any other libc variants. Use a more robust approach by directly detecting the definition of macros for those services. This change also enables non-wrapped access to such calls, which was not available until then (__STD() calls were routed to the wrapper regardless).
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