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AX_C_RESTRICT
This macro checks if the C99 restrict keyword is broken with the current compiler and optimizations settings. If broken, it undefines restrict to do no harm. As of 2019 gcc since 5.0 and clang since 6.0 (June 2017) are known to be broken and not yet fixed. See https://github.com/rust-lang/rust/issues/54878 with the links to the gcc and clang tickets.
Download the latest version of ax_c_restrict.m4 or browse the macro’s revision history.
Copyright © 2019 Reini Urban rurban@cpan.org
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