Compiling a C program with g++ 4.3.1 yields an error about std::FILE

Christopher Creutzig ccr at
Mon Aug 11 10:24:04 CEST 2008

Torbjorn Granlund wrote:

> In C, underscore-prefixed identifiera are "reserved for the
> implementation", and since GMP implements something, I have decided
> that __GMP and __gmp are OK to use.  :-)

 Sorry, no. Paragraph 3.12 defines what the C standard means by
“implementation,” and GMP is not covered by that. Essentially,
“implementation” means “compiler and standard libraries.”

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