find_library seems not recusrive on macos

Author: mpromonet

CMakeLists.txt

@@ -229,12 +229,12 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT WIN32)
     set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -isystem${WEBRTCROOT}/src/third_party/libc++/src/include")
   endif()
   set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -I${WEBRTCROOT}/src/buildtools/third_party/libc++ -nostdinc++ -isystem${WEBRTCROOT}/src/third_party/libc++abi/src/include -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE")
-  find_library(LIBC++ NAMES c++ HINTS "${WEBRTCOBJS}/buildtools/third_party" NO_DEFAULT_PATH)
+  find_library(LIBC++ NAMES c++ HINTS "${WEBRTCOBJS}/buildtools/third_party/libc++" NO_DEFAULT_PATH)
   if (LIBC++)
     message(STATUS "Found libc++ library at ${LIBC++}")
     target_link_libraries(${CMAKE_PROJECT_NAME} "${LIBC++}")
   endif()
-  find_library(LIBC++ABI NAMES c++abi HINTS "${WEBRTCOBJS}/buildtools/third_party" NO_DEFAULT_PATH)
+  find_library(LIBC++ABI NAMES c++abi HINTS "${WEBRTCOBJS}/buildtools/third_party/libc++abi" NO_DEFAULT_PATH)
   if (LIBC++ABI)
     message(STATUS "Found libc++abi library at ${LIBC++ABI}")
     target_link_libraries(${CMAKE_PROJECT_NAME} "${LIBC++ABI}")
@@ -352,12 +352,13 @@ endif()
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     message(STATUS "Compiler is Clang CMAKE_LIBRARY_ARCHITECTURE:${CMAKE_LIBRARY_ARCHITECTURE} CMAKE_SYSTEM_PROCESSOR:${CMAKE_SYSTEM_PROCESSOR}")
     if(CMAKE_SYSTEM_PROCESSOR MATCHES "armv.*")
-      add_definitions(-target arm-linux-gnueabihf)
+      target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE -target arm-linux-gnueabihf)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -isystem${CMAKE_FIND_ROOT_PATH}/usr/include/arm-linux-gnueabihf")
     elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
       if (NOT APPLE)
-        add_definitions(-target aarch64-linux-gnu)
+        target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE -target aarch64-linux-gnu)
       else ()
-        add_definitions(-target aarch64-apple-macos)
+        target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE -target aarch64-apple-macos)
       endif()
     endif()
 endif()

Dockerfile.arm64

@@ -14,7 +14,8 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-ins
 	&& cd ../webrtc \
 	&& fetch --nohooks webrtc \
 	&& cd ../webrtc-streamer \
-	&& cmake -DCMAKE_SYSTEM_PROCESSOR=arm64 -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY -DWEBRTCDESKTOPCAPTURE=OFF . && make \
+	&& cmake -DCMAKE_SYSTEM_PROCESSOR=arm64 -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY -DWEBRTCDESKTOPCAPTURE=OFF . \
+	&& make VERBOSE=1 \
 	&& make install \
 	&& rm -rf ../webrtc && rm -f *.a && rm -f src/*.o \
 	&& apt-get clean && rm -rf /var/lib/apt/lists/