add another default location to verilator (#3324)

vta/apps/tsim_example/cmake/modules/hw.cmake

@@ -113,7 +113,13 @@ else()
 
       # Build shared library (.so)
       set(VTA_HW_DPI_DIR ${VTA_DIR}/hardware/dpi)
-      set(VERILATOR_INC_DIR /usr/local/share/verilator/include)
+      if (EXISTS /usr/local/share/verilator/include)
+        set(VERILATOR_INC_DIR /usr/local/share/verilator/include)
+      elseif (EXISTS /usr/share/verilator/include)
+        set(VERILATOR_INC_DIR /usr/share/verilator/include)
+      else()
+        message(FATAL_ERROR "[TSIM_HW] Verilator include directory not found")
+      endif()
       set(VERILATOR_LIB_SRC ${VERILATOR_INC_DIR}/verilated.cpp ${VERILATOR_INC_DIR}/verilated_dpi.cpp)
 
       if (NOT TSIM_USE_TRACE STREQUAL "off")

vta/hardware/chisel/Makefile

@@ -15,15 +15,21 @@
 # specific language governing permissions and limitations
 # under the License.
 
-# Change this variable if Verilator is installed on a different location
-VERILATOR_INC_DIR ?= /usr/local/share/verilator/include
-
 ifeq (, $(shell which verilator))
  $(error "No Verilator in $(PATH), consider doing apt-get install verilator")
 endif
 
-ifeq (, $(wildcard $(VERILATOR_INC_DIR)/*))
- $(error "Verilator include directory is not set properly")
+# Change VERILATOR_INC_DIR if Verilator is installed on a different location
+ifeq (, $(VERILATOR_INC_DIR))
+  ifeq (, $(wildcard /usr/local/share/verilator/include/*))
+    ifeq (, $(wildcard /usr/share/verilator/include/*))
+      $(error "Verilator include directory is not set properly")
+    else
+      VERILATOR_INC_DIR := /usr/share/verilator/include
+    endif
+  else
+      VERILATOR_INC_DIR := /usr/local/share/verilator/include
+  endif
 endif
 
 CONFIG = DefaultF1Config