Follow-up Comment #1, sr #110271 (project autoconf):
Discussion on the list:
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This is a classic M4 quoting bug. The macro should quote the third
argument to AC_CACHE_CHECK (and really, should quote all the arguments).
The problem is that diversions do not work properly during arugment
collection so AC_REQUIRE (which depends on diversions) and many other
macros will not work properly if it is expanded during argument
collection.
Quote the arguments to AC_CACHE_CHECK and the prerequisite macros will
get expanded in the correct order.
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I've tested this is the case and this can be closed.
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