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lib9: make a p9frexp function wrapping system frexp Under certain conditions it looks like frexp gets #defined to something else on macOS during system headers, which then breaks the declaration in libc.h.
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1 e0c4896e 2020-01-12 rsc #include <u.h>

2 e0c4896e 2020-01-12 rsc #define NOPLAN9DEFINES

3 e0c4896e 2020-01-12 rsc #include <libc.h>

4 e0c4896e 2020-01-12 rsc 

5 e0c4896e 2020-01-12 rsc double

6 e0c4896e 2020-01-12 rsc p9frexp(double d, int *i)

7 e0c4896e 2020-01-12 rsc {

8 e0c4896e 2020-01-12 rsc 	return frexp(d, i);

9 e0c4896e 2020-01-12 rsc }