Add support for building with AltiVec extensions. Note that because

MACHINE_CPU is not defined on powerpc*, we rely only on ARCH.

Because of this we choose to optimize using instructions available in
POWER8 and newer, so this port built with SIMD option won't work on older
POWER CPUs (we could however add additional options for that, to support
AltiVec in older POWER, if desired).

While here, also remove BROKEN on powerpc.

PR:		234953
Submitted by:	Piotr Kubaj
Approved by:	portmgr (tier-2 blanket)

security/cryptopp/Makefile

@@ -14,8 +14,6 @@ COMMENT=	Free C++ class library of Cryptographic Primitives
 LICENSE=	BSL
 LICENSE_FILE=	${WRKSRC}/License.txt
 
-BROKEN_powerpc=	does not compile; unrecognized C++ options
-
 USES=		cpe compiler:c++11-lang gmake zip
 USE_LDCONFIG=	yes
 CPE_PRODUCT=	crypto++
@@ -35,6 +33,8 @@ PLIST_SUB+=	SOVERSION=${SOVERSION} \
 OPTIONS_DEFINE=		DEBUG DOCS FULL_DEBUG THREADS TOOLS
 OPTIONS_DEFINE_amd64=	SIMD
 OPTIONS_DEFINE_i386=	SIMD
+OPTIONS_DEFINE_powerpc=	SIMD
+OPTIONS_DEFINE_powerpc64=	SIMD
 OPTIONS_DEFAULT=	THREADS TOOLS
 OPTIONS_SUB=		yes
 
@@ -57,18 +57,23 @@ THREADS_LDFLAGS=	-lpthread
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MSIMD}
-.  if !${MACHINE_CPU:Msse2}
+.  if ${ARCH} == i386 || ${ARCH} == amd64
+.    if !${MACHINE_CPU:Msse2}
 CXXFLAGS+=	-DCRYPTOPP_DISABLE_ASM -DCRYPTOPP_DISABLE_SSE2
-.  endif
-.  if !${MACHINE_CPU:Mssse3}
+.    endif
+.    if !${MACHINE_CPU:Mssse3}
 CXXFLAGS+=	-DCRYPTOPP_DISABLE_SSSE3
-.  endif
-.  if !${MACHINE_CPU:Msse41}
+.    endif
+.    if !${MACHINE_CPU:Msse41}
 CXXFLAGS+=	-DCRYPTOPP_DISABLE_SSE4
+.    endif
+.  elif ${ARCH} == powerpc || ${ARCH} == powerpc64
+CXXFLAGS+=	-DCRYPTOPP_ALTIVEC_AVAILABLE -maltivec -mcrypto -mvsx
 .  endif
 .else
 CXXFLAGS+=	-DCRYPTOPP_DISABLE_ASM -DCRYPTOPP_DISABLE_SSE2 \
-		-DCRYPTOPP_DISABLE_SSSE3 -DCRYPTOPP_DISABLE_SSE4
+		-DCRYPTOPP_DISABLE_SSSE3 -DCRYPTOPP_DISABLE_SSE4 \
+		-DCRYPTOPP_DISABLE_ALTIVEC
 .endif
 
 pre-configure-FULL_DEBUG-on: