Eljay, That helped enormously, thanks for the pointer. They are indeed built into the compiler. Now I know to use -fno-builtin and -lm if I specifically want to use libm.a, and more importantly, why. Best regards, Harvey ----- Original Message ---- > From: Eljay Love-Jensen <eljay@xxxxxxxxx> > To: Harvey Muller <hlmuller@xxxxxxxxx>; GCC-help <gcc-help@xxxxxxxxxxx> > Sent: Friday, June 27, 2008 1:06:32 PM > Subject: Re: -lm not required when including functions from math.h > > Hi Harvey, > > Some math functions are built into the compiler. > > Some math functions are macros in the math.h header. > > Some platforms include -lm (or the analogous equivalent) for you. > > HTH, > --Eljay
