Revert "[cmake][ANTLR] Support setting path to ANTLR jar"

CMakeLists.txt

@@ -7,7 +7,6 @@ include(cmake/util/FindCUDA.cmake)
 include(cmake/util/FindVulkan.cmake)
 include(cmake/util/FindLLVM.cmake)
 include(cmake/util/FindROCM.cmake)
-include(cmake/util/FindANTLR.cmake)
 
 if(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/config.cmake)
   include(${CMAKE_CURRENT_BINARY_DIR}/config.cmake)

cmake/config.cmake

@@ -144,10 +144,6 @@ set(USE_ROCBLAS OFF)
 set(USE_SORT ON)
 
 # Build ANTLR parser for Relay text format
-# Possible values:
-# - ON: enable ANTLR by searching default locations (cmake find_program for antlr4 and /usr/local for jar)
-# - OFF: disable ANTLR
-# - /path/to/antlr-*-complete.jar: path to specific ANTLR jar file
 set(USE_ANTLR OFF)
 
 # Whether use Relay debug mode

cmake/modules/ANTLR.cmake

@@ -15,7 +15,29 @@
 # specific language governing permissions and limitations
 # under the License.
 if(USE_ANTLR)
-  find_antlr(${USE_ANTLR})
+  find_program(ANTLR4 antlr4)
+
+  if (NOT ANTLR4)
+    file(GLOB_RECURSE ANTLR4JAR
+          /usr/local/lib/antlr-*-complete.jar
+          /usr/local/Cellar/*antlr-*-complete.jar)
+
+    # Get the first element of the list of antlr jars.
+    # Sort and reverse the list so the item selected is the highest
+    #   version in lib or else in Cellar if no lib installation exists.
+    list(SORT ANTLR4JAR)
+    list(REVERSE ANTLR4JAR)
+    list(GET ANTLR4JAR 0 ANTLR4JAR)
+
+    set(JAVA_HOME $ENV{JAVA_HOME})
+    if (NOT DEFINED JAVA_HOME)
+      # Hack to get system to search for Java itself.
+      set(JAVA_HOME "/usr")
+    endif()
+
+    set(ANTLR4 ${JAVA_HOME}/bin/java -jar ${ANTLR4JAR})
+  endif()
+
   if(ANTLR4)
 
     set(RELAY_PARSER_DIR