MinGW and O3

[Lectem]

I'm having problems compiling a project under MinGW 32 (gcc 4.8.1).
If compiling with option -O3 or -O2, I get this error :

c:\mingw\include\math.h: In function 'float hypotf(float, float)':
c:\mingw\include\math.h:635:30: error: '_hypot' was not declared in this scope
{ return (float)(_hypot (x, y)); }

No problem when I use only #include with -O3

[Kaitto]

Hi!, i had the same problem... well a few minutes ago.
i don't know if is the real solution, but i've changed that '_hypot' by 'hypot' and compiled without warnings. you can confirm this?, just replace that line.

[Groovounet]

Hi,

How do you reproduce this issue?
GLM never uses directly hypotf or _hypot so when you are changing _hypot by hypot this is only updating GCC headers which can't be the right fix.

Thanks,
Christophe

[Lectem]

Hi,
Sorry but I forgot to report the fact that it is actually a bug coming from MinGW, see https://ehc.ac/p/mingw/bugs/2250/
A workaround mentioned there is to use -D__NO_INLINE__ to the compiler options.

[Kaitto]

yes is a bug from MinGW, am not using GLM but i found that is the same
error when it tries to inline some maths functions (that uses internal
hypot)... And because I WANT to inline what is suposed to be, i changed
that header (isn't the right fix, but works).

2015-02-09 20:49 GMT-03:00 Lectem notifications@github.com:

Hi,
Sorry but I forgot to report the fact that it is actually a bug coming
from MinGW, see https://ehc.ac/p/mingw/bugs/2250/
A workaround mentioned there is to use -D__NO_INLINE__ to the compiler
options.

Reply to this email directly or view it on GitHub
#300 (comment).

[Groovounet]

This is a GCC issues with no apparent workaround on GLM side. Use -D__NO_INLINE__ or edit math.h as a workaround. Closing.

Thanks,
Christophe