C99 support

[Roger Leigh]

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Are there any tests I can use to specify that I want a C99 compiler?
AC_PROG_CC isn't sufficient.

Would it be possible to introduce a macro to select the C standard
required (K&R, C89, C99)?

Ideally it could just detemine that gcc could accept the "-std=c99"
and was therefore a C99 compiler (or any corresponding option for a
non-GNU compiler).  Alternatively, the standard specifies that c99
must be a conforming C99 compiler, so this could be used as a
fallback.


Regards,
Roger

- -- 
Roger Leigh
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