https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98201
--- Comment #16 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Wed, Dec 09, 2020 at 01:24:20PM +0000, dpozar at ecs dot umass.edu wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98201 > > --- Comment #15 from dpozar at ecs dot umass.edu --- > attached is the output file from > > c:\MinGW>objdump -t c:\mingw\programs\testcsqrt.exe >cmdout.txt > > don't see any reference to libraries, though. > Is testcsqrt.exe compiled with the -static option? cmdout.txt shows [152](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 1) 0x00001210 _csqrtf AUX tagndx 0 ttlsiz 0x0 lnnos 0 next 0 On my FreeBSD system and a static binary, I see % gfcx -o z -static a.f90 % objdump -t z | grep csqrt 00000000 l df *ABS* 00000000 s_csqrtf.c 08078a90 g F .text 0000021d csqrtf On my FreeBSD system and a dynamic binary, I see % gfcx -o z a.f90 % objdump -t z | grep csqrt 00000000 F *UND* 00000000 csqrtf@@FBSD_1.1 This info is sufficient to tell me that csqrtf lives in FreeBSD's libm. objdump has several options that may help determine where csqrtf() resides. I don't know MingW (or windows 10) to be of any additional help.