cad/brlcad: fix build on powerpc64
/usr/bin/c++ -DBN_DLL_EXPORTS -DBRLCADBUILD -DHAVE_CONFIG_H -I/wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/include -I/wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/include/brlcad -isystem /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/other/Eigen -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -std=c++11 -D_XOPEN_SOURCE=700 -pipe -fvisibility=hidden -fno-strict-aliasing -fno-common -fexceptions -ftemplate-depth-128 -m64 -g -ggdb3 -Qunused-arguments -O3 -finline-functions -flto -fno-omit-frame-pointer -pedantic
-Wall -Wextra -Wundef -Wfloat-equal -Wshadow -Wbad-function-cast -Winline -Wno-long-long -Wno-variadic-macros -Wdocumentation -std=c++11 -fPIC -MD -MT src/libbn/CMakeFiles/libbn-obj.dir/plane.cpp.o -MF src/libbn/CMakeFiles/libbn-obj.dir/plane.cpp.o.d -o src/libbn/CMakeFiles/libbn-obj.dir/plane.cpp.o -c /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/libbn/plane.cpp
In file included from /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/libbn/plane.cpp:36:
In file included from /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/other/Eigen/Eigen/SVD:11:
In file included from /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/other/Eigen/Eigen/QR:11:
In file included from /wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/other/Eigen/Eigen/Core:210:
/wrkdirs/usr/ports/cad/brlcad/work/brlcad-7.32.6/src/other/Eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:1345:32: error: use of undeclared identifier 'vec_sqrt'; did you mean 'vec_rsqrt'?
BF16_TO_F32_UNARY_OP_WRAPPER(vec_sqrt, a);
^/usr/lib/clang/14.0.5/include/altivec.h:8501:34: note: 'vec_rsqrt' declared here
static vector float ATTRS_o_ai vec_rsqrt(vector float a) {
^