Andrew Hutchinson <andrewhutchin...@cox.net> writes: > I am tracking test failure with avr target where function sqrtf is > undefined reference at link time. > > Here is command line: > > /media/verbatim/gcchead/obj-dir/gcc/xgcc > -B/media/verbatim/gcchead/obj-dir/gcc/ > /media/verbatim/gcchead/trunk/gcc/testsuite/gcc.dg/pr41963.c -O2 > -ffast-math -DSTACK_SIZE=2048 -DNO_TRAMPOLINES -DSIGNAL_SUPPRESS > -mmcu=atmega128 /home/andy/winavrfiles/avrtest/dejagnuboards/exit.c > -Wl,-u,vfprintf -lprintf_flt > -Wl,-Tbss=0x802000,--defsym=__heap_end=0x80ffff -lm -o pr41963.exe > > I am lead to believe that gcc might use builtin_sqrtf rather than > sqrtf(). I am successfully using fabsf() - with no link errors. > > Is their any target configuration needed for builtin_sqrtf that I > should know about ?
If your target does not define a sqrtsf2 insn, then using builtin_sqrtf won't make any difference; gcc will still call the libc's sqrtf function. Ian
