i386 target on BSDs doesn't include SSE2 by default

--- CMakeLists.txt.orig	2025-01-23 13:25:53 UTC
+++ CMakeLists.txt
@@ -60,7 +60,10 @@ endif()
 	message(STATUS "Setting install rpath to ${CMAKE_INSTALL_RPATH}")
 endif()
 
+find_package(OpenSSL REQUIRED)
 find_package(BCToolbox 5.3.0 REQUIRED)
+find_package(ZLIB REQUIRED)
+set(CMAKE_PREFIX_PATH "%%LOCALBASE%%/ffmpeg4;%%LOCALBASE%%/ffmpeg4/libexec")
 find_package(Mediastreamer2 5.3.0 REQUIRED)
 
 find_library(LIBM NAMES m)
@@ -124,6 +127,13 @@ endif()
 	add_definitions(-D__ARMEL__)
 endif()
 
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
+	add_definitions(
+		-DWEBRTC_ARCH_ARM64
+		-DWEBRTC_HAS_NEON
+	)
+endif()
+
 set(AEC_CXX11_FLAGS "-std=c++11")
 
 set(WEBRTC_SIGNAL_PROCESSING_DIR ${WEBRTC_SRC_DIR}/common_audio/signal_processing)
@@ -208,6 +218,11 @@ if(ENABLE_AEC)
 			${AEC_SRC_DIR}/aec_core_sse2.c
 			${AEC_SRC_DIR}/aec_rdft_sse2.c
 		)
+		set_source_files_properties(
+			${AEC_SRC_DIR}/aec_core_sse2.c
+			${AEC_SRC_DIR}/aec_rdft_sse2.c
+			PROPERTIES COMPILE_FLAGS "-msse2"
+		)
 	endif()
 	include_directories(
 		${AEC_SRC_DIR}/include
@@ -450,4 +465,3 @@ add_subdirectory(build)
 
 
 add_subdirectory(build)
-