Hi Everyone, I have a Travis job failing on ppc64le: https://travis-ci.org/noloader/cryptopp-pem/jobs/612654182 . Compiling a source file with Power9 flags: g++ -DNDEBUG -g2 -O3 -mcpu=power9 -maltivec -c ppc_power9.cpp That includes a header with this function: inline uint32x4_p VecLoadBE(const byte src[16]) { #if defined(_ARCH_PWR9) return (uint32x4_p)vec_xl_be(0, CONST_V8_CAST(src)); #elif (BIG_ENDIAN) return (uint32x4_p)VecLoad(src); #else return (uint32x4_p)VecReverse(VecLoad(src)); #endif } Results in: ppc_simd.h: In function ‘uint32x4_p VecLoadBE(const byte*)’: ppc_simd.h:466:24: error: ‘vec_xl_be’ was not declared in this scope return (uint32x4_p)vec_xl_be(0, CONST_V8_CAST(src)); According to the GCC docs vec_xl_be is available with ISA 3.0: https://gcc.gnu.org/onlinedocs/gcc/PowerPC-AltiVec-Built-in-Functions-Available-on-ISA-3_002e0.html Does someone know why the compile is failing? Thanks in advance.