riscv fenv.h header file guard typo

Joel Sherrill <[email protected]>
Newsgroups gmane.comp.lib.newlib
Message-ID <CAF9ehCVdmayV2WM+7CQXWsJEuXrXdoZV8ufy_b-OwhLqVhhoZg@mail.gmail.com>
Hi

While working on the proposed fenv.h infrastructure support, I noticed that
the riscv fenv.h and sys/fenv.h appear to have very similar header guards
(only a trailing _ differentiates them).

/libc/machine/riscv/include/fenv.h:#ifndef _FENV_H
./libc/machine/riscv/sys/fenv.h:#ifndef _FENV_H_

Would it be better for sys/fenv.h to have _SYS_FENV_H?

--joel
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