fixed: properly probe for hipify-perl command

error out in configuration instead of surprising user during build

CMakeLists.txt

@@ -70,6 +70,19 @@ if (CONVERT_CUDA_TO_HIP AND CMAKE_VERSION VERSION_GREATER_EQUAL "3.21")
   find_package(hipsparse REQUIRED)
   find_package(hipblas REQUIRED)
   link_libraries(roc::hipblas roc::hipsparse)
+  find_program(HIPIFY_PERL_COMMAND
+               NAMES hipify-perl
+               HINTS
+                PATH /opt/rocm/bin
+  )
+  if(HIPIFY_PERL_COMMAND)
+    add_executable(hipify-perl IMPORTED GLOBAL)
+    set_target_properties(hipify-perl
+                          PROPERTIES IMPORTED_LOCATION ${HIPIFY_PERL_COMMAND}
+    )
+  else()
+    message(FATAL_ERROR "hipify-perl required to convert CUDA to HIP not found")
+  endif()
 elseif(CONVERT_CUDA_TO_HIP)
   message("To generate HIP code for AMD GPUs run CMake with version >= 3.21")
 endif()

CMakeLists_files.cmake

@@ -41,10 +41,18 @@ macro (ADD_CUDA_OR_HIP_FILE LIST DIR FILE)
 
     # add a custom command that will hipify
     add_custom_command(
-        OUTPUT ${hip_file_path}
-        COMMAND bash "${PROJECT_SOURCE_DIR}/bin/hipify_file.sh" ${cuda_file_path} ${hip_file_path}
-        DEPENDS ${cuda_file_path}
-        COMMENT "Rehipifying because of change in ${cuda_file_path}"
+        OUTPUT
+          ${hip_file_path}
+        COMMAND
+          bash
+          ${PROJECT_SOURCE_DIR}/bin/hipify_file.sh
+          ${cuda_file_path}
+          ${hip_file_path}
+          $<TARGET_FILE:hipify-perl>
+        DEPENDS
+          ${cuda_file_path}
+        COMMENT
+          "Rehipifying because of change in ${cuda_file_path}"
     )
 
     # set_source_files_properties(${relpath} PROPERTIES LANGUAGE HIP)

bin/hipify_file.sh

@@ -5,12 +5,13 @@ set -e # Make sure the script fails if a command fails
 # it should be run automatically on the correct files through cmake
 input_file=$1
 output_file=$2
+hipify_command=$3
 
 # make sure the output folder exists
 mkdir -p $(dirname $output_file)
 
 # hipify out-of-place
-hipify-perl $input_file > $output_file
+$hipify_command $input_file > $output_file
 
 # expand includes so we only need include_directories (path to hip)
 sed -i 's/^#include <hipblas\.h>/#include <hipblas\/hipblas.h>/g' $output_file