URL:
<http://savannah.nongnu.org/bugs/?49984>
Summary: fabs missing from libm implementation.
Project: AVR C Runtime Library
Submitted by: gjlayde
Submitted on: Wed 04 Jan 2017 11:19:01 AM GMT
Category: Library
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Percent Complete: 0%
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 2.0.0
Fixed Release: None
_______________________________________________________
Details:
fabs is missing from the libm implementation:
#include <math.h>
float use_fabsf (float x)
{
return fabsf (x);
}
double use_fabs (double x)
{
return fabs (x);
}
int main (void) { return 0; }
* Compiling with -ffreestanding or with -fno-builtin will run against a linker
error use_fabs.o: In function `use_fabsf':
use_fabs.c:(.text+0x24): undefined reference to `fabs'
* Compiling with -std=c90 will run into "inline", which is not available in
C90: avr/include/math.h:341:42: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'int'
__ATTR_CONST__ static inline int isfinite (double __x)
^~~
/srv/local/gnu/install/gcc-6/avr/include/math.h:359:42: error: expected '=',
',', ';', 'asm' or '__attribute__' before 'double'
__ATTR_CONST__ static inline double copysign (double __x, double __y)
"inline" should be replaced by __inline__.
_______________________________________________________
Reply to this item at:
<http://savannah.nongnu.org/bugs/?49984>
_______________________________________________
Message sent via/by Savannah
http://savannah.nongnu.org/
_______________________________________________
AVR-libc-dev mailing list
AVR-libc-dev@nongnu.org
https://lists.nongnu.org/mailman/listinfo/avr-libc-dev
