fix(cmake): enable webserver deps on macOS (httplib include/link)

Root CMake skipped openssl/curl/cpp-httplib and c-ares on APPLE while
state.h still included webserver.h on all non-Windows Unix builds,
causing missing httplib.h on Darwin. Align userspace/falco targets with
those conditions, fix FALCO_INCLUDE_DIRECTORIES typo, and gate
CPPHTTPLIB_OPENSSL_SUPPORT with the webserver block.

Signed-off-by: Mike Yoder <myoder@roblox.com>

Author: yoderme

CMakeLists.txt

@@ -174,7 +174,6 @@ include(njson)
 include(yaml-cpp)
 
 if(NOT WIN32
-   AND NOT APPLE
    AND NOT MINIMAL_BUILD
    AND NOT EMSCRIPTEN
 )
@@ -184,7 +183,7 @@ if(NOT WIN32
 	# libcurl
 	include(curl)
 
-	# todo(jasondellaluce,rohith-raju): support webserver for non-linux builds too cpp-httlib
+	# cpp-httplib (health/metrics webserver; used on all non-Windows Unix, e.g. Linux and macOS)
 	include(cpp-httplib)
 endif()
 
@@ -203,10 +202,7 @@ if(USE_GPERFTOOLS)
 	include(gperftools)
 endif()
 if(NOT MINIMAL_BUILD)
-	if(NOT WIN32
-	   AND NOT APPLE
-	   AND NOT EMSCRIPTEN
-	)
+	if(NOT WIN32 AND NOT EMSCRIPTEN)
 		include(cares)
 	endif()
 endif()

userspace/falco/CMakeLists.txt

@@ -81,30 +81,28 @@ if(NOT WIN32)
 	target_sources(falco_application PRIVATE outputs_program.cpp outputs_syslog.cpp)
 endif()
 
-if(CMAKE_SYSTEM_NAME MATCHES "Linux" AND NOT MINIMAL_BUILD)
+if(NOT WIN32 AND NOT EMSCRIPTEN AND NOT MINIMAL_BUILD)
 	target_sources(falco_application PRIVATE outputs_http.cpp falco_metrics.cpp webserver.cpp)
 
-	list(APPEND FALCO_INCLUDE_DIRECTORIES FALCO_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}"
-		 "${CARES_INCLUDE}"
-	)
+	list(APPEND FALCO_INCLUDE_DIRECTORIES "${OPENSSL_INCLUDE_DIR}" "${CARES_INCLUDE}")
 
 	if(TARGET c-ares)
 		list(APPEND FALCO_DEPENDENCIES c-ares)
 	endif()
 
-	if(CMAKE_SYSTEM_NAME MATCHES "Linux" AND USE_BUNDLED_CURL)
+	if(USE_BUNDLED_CURL)
 		list(APPEND FALCO_DEPENDENCIES curl)
 	endif()
 
 	list(APPEND FALCO_LIBRARIES httplib::httplib "${CURL_LIBRARIES}" "${CARES_LIB}")
+
+	target_compile_definitions(falco_application PRIVATE CPPHTTPLIB_OPENSSL_SUPPORT)
 endif()
 
 if(EMSCRIPTEN)
 	target_compile_options(falco_application PRIVATE "-sDISABLE_EXCEPTION_CATCHING=0")
 endif()
 
-target_compile_definitions(falco_application PRIVATE CPPHTTPLIB_OPENSSL_SUPPORT)
-
 add_dependencies(falco_application ${FALCO_DEPENDENCIES})
 
 target_link_libraries(falco_application ${FALCO_LIBRARIES})