fix amd64 builds on macos

fix homebrew_prefix

build_single.sh

@@ -148,11 +148,14 @@ pushd $repo/contrib/depends
             MACOS_LIBS_DIR="${PWD}/host-apple-darwin"
             rm -rf ${MACOS_LIBS_DIR}
             mkdir -p ${MACOS_LIBS_DIR}/lib
+            if [[ "x$HOMEBREW_PREFIX" == "x" ]];
+            then
                 export HOMEBREW_PREFIX=/opt/homebrew
                 if [[ ! -d "$HOMEBREW_PREFIX" ]];
                 then
                     export HOMEBREW_PREFIX=/usr/local
                 fi
+            fi
             verbose_copy "${HOMEBREW_PREFIX}/lib/libunbound.a" ${MACOS_LIBS_DIR}/lib/libunbound.a
             verbose_copy "${HOMEBREW_PREFIX}/lib/libboost_chrono-mt.a" ${MACOS_LIBS_DIR}/lib/libboost_chrono-mt.a
             verbose_copy "${HOMEBREW_PREFIX}/lib/libboost_locale-mt.a" ${MACOS_LIBS_DIR}/lib/libboost_locale-mt.a

monero_libwallet2_api_c/CMakeLists.txt

@@ -294,6 +294,13 @@ else()
     set(EXTRA_LIBS "")
 endif()
 
+if (${HOST_ABI} STREQUAL "host-apple-darwin")
+    EXECUTE_PROCESS( COMMAND uname -m COMMAND tr -d '\n' OUTPUT_VARIABLE ARCHITECTURE )
+    if (NOT ${ARCHITECTURE} STREQUAL arm64)
+        set(EXTRA_LIBS "wallet-crypto")
+    endif()
+endif()
+
 if (${HOST_ABI} STREQUAL "x86_64-apple-darwin11" OR ${HOST_ABI} STREQUAL "aarch64-apple-darwin11")
   set(EXTRA_LIBS_APPLE "-framework IOKit" "-framework CoreFoundation" "-framework Cocoa" hidapi)
 #   set_target_properties(wallet2_api_c PROPERTIES LINK_FLAGS "-Wl,-F/Library/Frameworks")