Le 22/07/2014 15:02, Manuel Bouyer a écrit :
Hello, while building a evbarm release with some specific CPUFLAGS: -mcpu=cortex-a8 -mtune=cortex-a8 -mfpu=neon -funsafe-math-optimizations I ran into an error building xterm: undefined references to pow pow(3) is defined in libm and xterm doesn't reference it explicitely. But it does some double computations; I suspect some optimisation comes with calling pow. Anyone know what could be going on here ? blindly adding -lm in xterm's Makefile seems wrong ...
Squares and such that get replaced by pow()? There are a couple in xsrc/.../xterm: xb * xb , yb * yb, ...
Bizarre though, multiplication is usually faster than pow(). Or sqrt() with pow(,0.5). -- Jean-Yves Migeon