Be more strict about `target_link_libraries()`

Bazel readily enforces header visiblity for each target, CMake is more lenient.

PiperOrigin-RevId: 355407845
Change-Id: Ic59fa2162db8456d4c5cf4205c0fe42cc79874a9

CMakeLists.txt

@@ -89,8 +89,6 @@ target_include_directories(sapi_base INTERFACE
   "${SAPI_BINARY_DIR}"
   "${SAPI_SOURCE_DIR}"
   "${Protobuf_INCLUDE_DIR}"
-  # Need to reach into Abseil internal headers from a few targets.
-  "${CMAKE_BINARY_DIR}/absl-src"
 )
 if(UNIX)
   foreach(flag IN ITEMS -Wno-deprecated

sandboxed_api/CMakeLists.txt

@@ -25,9 +25,9 @@ add_library(sapi_config ${SAPI_LIB_TYPE}
   config.h
 )
 add_library(sapi::config ALIAS sapi_config)
-target_link_libraries(sapi_config PRIVATE
-  absl::config
-  sapi::base
+target_link_libraries(sapi_config
+  PRIVATE sapi::base
+  INTERFACE absl::config
 )
 
 # sandboxed_api:proto_arg

sandboxed_api/util/CMakeLists.txt

@@ -65,11 +65,13 @@ add_library(sapi_util_raw_logging ${SAPI_LIB_TYPE}
   raw_logging.h
 )
 add_library(sapi::raw_logging ALIAS sapi_util_raw_logging)
-target_link_libraries(sapi_util_raw_logging PRIVATE
-  absl::str_format
-  absl::strings
-  sapi::strerror
-  sapi::base
+target_link_libraries(sapi_util_raw_logging
+  PRIVATE absl::config
+          absl::str_format
+          absl::strings
+          sapi::strerror
+          sapi::base
+  INTERFACE absl::core_headers
 )
 
 # sandboxed_api/util:runfiles