https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254714
Bug ID: 254714
Summary: include <math.h> contains a c11 extension
Product: Base System
Version: 12.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: misc
Assignee: [email protected]
Reporter: [email protected]
This code:
> #include <math.h>
>
> int main() { return !isfinite(1.0); }
triggers this warning:
> $ cc -Wall -Wextra -pedantic -std=gnu99 -c x.c
> x.c:4:22: warning: '_Generic' is a C11 extension [-Wc11-extensions]
> int main() { return !isfinite(1.0); }
> ^
> /usr/include/math.h:111:21: note: expanded from macro 'isfinite'
> #define isfinite(x) __fp_type_select(x, __isfinitef, __isfinite, __isfinitel)
> ^
> /usr/include/math.h:82:39: note: expanded from macro '__fp_type_select'
> #define __fp_type_select(x, f, d, ld) _Generic((x), \
> ^
> 1 warning generated.
The igraph project used -Werror and this problem caused build failure.
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