http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49302
--- Comment #9 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-06-08 13:51:34 UTC --- Hm, this isn't going to work for all cases. When I reproduce the problem on powerpc64-linux without forcing a hardware square root, I see: spawn /home/wschmidt/gcc/build/gcc-mainline-pr49302/gcc/xgcc -B/home/wschmidt/gcc/build/gcc-mainline-pr49302/gcc/ c_lto_20110201-1_0.o -O0 -flto -O2 -ffast-math -fuse-linker-plugin -m32 -o gcc-dg-lto-20110201-1-01 /tmp/cc1mUEPp.ltrans0.ltrans.o: In function `foo': cc1mUEPp.ltrans0.o:(.text+0x5c): undefined reference to `pow' cc1mUEPp.ltrans0.o:(.text+0x74): undefined reference to `sqrt' collect2: error: ld returned 1 exit status compiler exited with status 1 output is: /tmp/cc1mUEPp.ltrans0.ltrans.o: In function `foo': cc1mUEPp.ltrans0.o:(.text+0x5c): undefined reference to `pow' cc1mUEPp.ltrans0.o:(.text+0x74): undefined reference to `sqrt' collect2: error: ld returned 1 exit status Expanding cabs to sqrt(r*r + i*i) will still leave an unresolved reference to sqrt.
