We need to export the CRYPTOPP_DISABLE_ASM flag if cryptopp was not built
with SIMD support. Certain functions prototypes are guarded by this
flag and build failures will arise in other ports if not set appropriately.

--- GNUmakefile.orig	2021-01-01 17:22:45 UTC
+++ GNUmakefile
@@ -71,7 +71,7 @@ ifeq ($(SYSTEMX),)
   SYSTEMX := $(shell uname -s 2>/dev/null)
 endif
 
-IS_LINUX := $(shell echo "$(SYSTEMX)" | $(GREP) -i -c "Linux")
+IS_LINUX := $(shell echo "$(SYSTEMX)" | $(GREP) -i -c -E "Linux|FreeBSD")
 IS_HURD := $(shell echo "$(SYSTEMX)" | $(GREP) -i -c -E "GNU|Hurd")
 IS_MINGW := $(shell echo "$(SYSTEMX)" | $(GREP) -i -c "MinGW")
 IS_CYGWIN := $(shell echo "$(SYSTEMX)" | $(GREP) -i -c "Cygwin")
@@ -795,7 +795,7 @@ endif
 
 # Use -pthread whenever it is available. See http://www.hpl.hp.com/techreports/2004/HPL-2004-209.pdf
 #   http://stackoverflow.com/questions/2127797/gcc-significance-of-pthread-flag-when-compiling
-ifeq ($(DETECT_FEATURES),1)
+ifeq (1,1)
  ifeq ($(XLC_COMPILER),1)
   ifeq ($(findstring -qthreaded,$(CXXFLAGS)),)
    TPROG = TestPrograms/test_pthreads.cxx
@@ -1450,7 +1450,7 @@ libcryptopp.pc:
 	@echo 'Version: 8.4' >> libcryptopp.pc
 	@echo 'URL: https://cryptopp.com/' >> libcryptopp.pc
 	@echo '' >> libcryptopp.pc
-	@echo 'Cflags: -I$${includedir}' >> libcryptopp.pc
+	@echo 'Cflags: -I$${includedir} $(findstring -DCRYPTOPP_DISABLE_ASM,$(CXXFLAGS))' >> libcryptopp.pc
 	@echo 'Libs: -L$${libdir} -lcryptopp' >> libcryptopp.pc
 
 # This recipe prepares the distro files