Error when compiling for Linux PowerPC 32-bit

[Link4Electronics]

Hello,

When trying to compile on powerpc 32-bit running linux, it fails with multiple errors: undefinied reference to sqrtf Adding -lm to LIBS += fixes that, compiles and works. I dind't make a PR about it because I don't know it it breaks for other linux platforms or not.

Best regards, Link.

[UnknownShadow200]

Which compiler are you using? And how specifically are you compiling it?

[Link4Electronics]

GCC 15.2.1 compiling by just tyíng make. It doesn't happen with ppc64. Is this gcc fault, how it was compiled for this platform?

Regards, Link.

[UnknownShadow200]

__builtin_sqrtf can resolve to either

• the sqrtf function in libm
• native assembly instruction(s) for calculating the square root

In the case of the PowerPC ISA, although there is a fsqrts instruction for calculating the square root, it is only an optional instruction.

So I guess what happens is that the 32 bit compiler assumes it is NOT supported by default, while the 64 bit compiler assumes it is. (Apparently -mpowerpc-gpopt enables assuming that fsqrts is supported)

[UnknownShadow200]

b4fdd26946256a1d3327fcd89d70d160986b3f98 changes the makefile so that -lm is always linked, which should resolve this.