Fix build with Clang (not AppleClang) on macOS

src/algorithms/libs/CMakeLists.txt

@@ -139,6 +139,14 @@ set_property(TARGET algorithms_libs
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
 )
 
+if(OS_IS_MACOSX)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")  # not AppleClang
+        target_compile_definitions(algorithms_libs
+            PUBLIC
+                -DBOOST_ASIO_HAS_STD_STRING_VIEW
+        )
+    endif()
+endif()
 
 ###############################################################################
 

src/algorithms/signal_source/gnuradio_blocks/CMakeLists.txt

@@ -75,6 +75,15 @@ if(ENABLE_RAW_UDP AND PCAP_FOUND)
     )
 endif()
 
+if(OS_IS_MACOSX)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")  # not AppleClang
+        target_compile_definitions(signal_source_gr_blocks
+            PUBLIC
+                -DBOOST_ASIO_HAS_STD_STRING_VIEW
+        )
+    endif()
+endif()
+
 set_property(TARGET signal_source_gr_blocks APPEND PROPERTY
     INTERFACE_INCLUDE_DIRECTORIES $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
 )

src/algorithms/tracking/libs/CMakeLists.txt

@@ -91,6 +91,15 @@ target_include_directories(tracking_libs
         ${OPT_TRACKING_INCLUDES}
 )
 
+if(OS_IS_MACOSX)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")  # not AppleClang
+        target_compile_definitions(tracking_libs
+            PUBLIC
+                -DBOOST_ASIO_HAS_STD_STRING_VIEW
+        )
+    endif()
+endif()
+
 set_property(TARGET tracking_libs
     APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>

src/core/monitor/CMakeLists.txt

@@ -49,6 +49,15 @@ target_link_libraries(core_monitor
         Gnuradio::pmt
 )
 
+if(OS_IS_MACOSX)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")  # not AppleClang
+        target_compile_definitions(core_monitor
+            PUBLIC
+                -DBOOST_ASIO_HAS_STD_STRING_VIEW
+        )
+    endif()
+endif()
+
 set_property(TARGET core_monitor
     APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>

src/core/receiver/CMakeLists.txt

@@ -159,6 +159,15 @@ target_link_libraries(core_receiver
         pvt_adapters
 )
 
+if(OS_IS_MACOSX)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")  # not AppleClang
+        target_compile_definitions(core_receiver
+            PUBLIC
+                -DBOOST_ASIO_HAS_STD_STRING_VIEW
+        )
+    endif()
+endif()
+
 set_property(TARGET core_receiver APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/core/receiver>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/core/interfaces>