> TRIP_TRY_CFLAGS([-O2], [], [TRIP_TRY_CFLAGS([-O])])

	Sorry this is obviously:

POV_TRY_CFLAGS([-O2], [], [POV_TRY_CFLAGS([-O])])

	By the way this macro is for usage with autoconf-2.5x.
I didn't tested it with the old autoconf-2.13 which might give
problem with the quotations used in the sed call of the macro
for instance. All arguments must be properly quoted with brackets,
otherwise the macro will fail.

	- N.C.


PS: some other examples:

POV_TRY_CFLAGS([-ansi], [], [POV_TRY_CFLAGS([-Aa])])
POV_TRY_CFLAGS([-Wall], [], [POV_TRY_CFLAGS([-fullwarn])])

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