From a3aa69b9f476a149600affa11dce6c271fb77b2c Mon Sep 17 00:00:00 2001
From: Luc Grosheintz <luc.grosheintz@gmail.com>
Date: Mon, 16 Sep 2024 15:18:43 +0200
Subject: [PATCH] Add CMake code to use NMODL codegenerator.

By adding:

    cmake -DNRN_ENABLE_NMODL=On ...

developers can opt into replacing `nocmodl` with `nmodl`.
---
 bin/CMakeLists.txt              | 11 +++++++++++
 bin/nrnivmodl.in                |  2 +-
 bin/nrnivmodl_makefile_cmake.in |  2 +-
 cmake/MacroHelper.cmake         |  7 ++++---
 4 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/bin/CMakeLists.txt b/bin/CMakeLists.txt
index cd537ec88e..f2f8761174 100644
--- a/bin/CMakeLists.txt
+++ b/bin/CMakeLists.txt
@@ -33,6 +33,17 @@ set(CMAKE_INSTALL_DATADIR_NMODL share/nmodl)
 # =============================================================================
 include(CMakeListsNrnMech)
 
+
+# =============================================================================
+# Flags for picking NOCMODL/NMODL
+# =============================================================================
+if(NRN_ENABLE_NMODL)
+  set(NRN_NMODL_--neuron "--neuron")
+  set(NRN_CODEGENERATOR_NAME "nmodl")
+else()
+  set(NRN_CODEGENERATOR_NAME "nocmodl")
+endif()
+
 # =============================================================================
 # nrnmech_makefile (based on coreneuron Configure templates)
 # =============================================================================
diff --git a/bin/nrnivmodl.in b/bin/nrnivmodl.in
index ce34ff95fe..93020a817a 100755
--- a/bin/nrnivmodl.in
+++ b/bin/nrnivmodl.in
@@ -187,7 +187,7 @@ for i in "${files[@]}" ; do
   echo "\
 ${base_name// /\\ }.cpp: ${f}.mod \$(NOCMODL)
 	@printf \" -> \$(C_GREEN)NMODL\$(C_RESET) \$<\\\n\"
-	(cd \"$dir_name\"; @NRN_NOCMODL_SANITIZER_ENVIRONMENT_STRING@ MODLUNIT=\$(NRNUNITS) \$(NOCMODL) \"$base_name.mod\" -o \"$mdir\" $UserNMODLFLAGS)
+	(cd \"$dir_name\"; @NRN_NOCMODL_SANITIZER_ENVIRONMENT_STRING@ MODLUNIT=\$(NRNUNITS) \$(NOCMODL) \"$base_name.mod\" @NRN_NMODL_--neuron@ -o \"$mdir\" $UserNMODLFLAGS)
 
 ./${base_name// /\\ }.o: ${base_name// /\\ }.cpp
 	@printf \" -> \$(C_GREEN)Compiling\$(C_RESET) ${PWD}/\$<\\\n\"
diff --git a/bin/nrnivmodl_makefile_cmake.in b/bin/nrnivmodl_makefile_cmake.in
index 49164a7656..da3c6fd0da 100644
--- a/bin/nrnivmodl_makefile_cmake.in
+++ b/bin/nrnivmodl_makefile_cmake.in
@@ -71,7 +71,7 @@ CXX_LINK_EXE = $(CXX) $(CXXFLAGS) @CMAKE_EXE_LINKER_FLAGS@ @NRN_LINK_FLAGS_STRIN
 CXX_LINK_SHARED = $(CXX) $(CXXFLAGS) @CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS@ @CMAKE_SHARED_LIBRARY_CXX_FLAGS@ @CMAKE_SHARED_LINKER_FLAGS@ @NRN_LINK_FLAGS_STRING@
 
 ifeq ($(UserNMODLBIN), )
-NOCMODL = $(bindir)/nocmodl
+NOCMODL = $(bindir)/@NRN_CODEGENERATOR_NAME@
 else
 NOCMODL = $(UserNMODLBIN)
 endif
diff --git a/cmake/MacroHelper.cmake b/cmake/MacroHelper.cmake
index fa0623c81c..d7a91b38d9 100644
--- a/cmake/MacroHelper.cmake
+++ b/cmake/MacroHelper.cmake
@@ -153,18 +153,19 @@ macro(nocmodl_mod_to_cpp modfile_basename)
   if(CMAKE_VERSION VERSION_LESS "3.17")
     set(REMOVE_CMAKE_COMMAND "remove")
   endif()
+  get_filename_component(modfile_output_dir ${PROJECT_SOURCE_DIR}/${modfile_basename}.mod DIRECTORY)
   add_custom_command(
     OUTPUT ${PROJECT_BINARY_DIR}/${modfile_basename}.cpp
     COMMAND
       ${CMAKE_COMMAND} -E env "MODLUNIT=${PROJECT_BINARY_DIR}/share/nrn/lib/nrnunits.lib"
-      ${NRN_NOCMODL_SANITIZER_ENVIRONMENT} $<TARGET_FILE:nocmodl>
-      ${PROJECT_SOURCE_DIR}/${modfile_basename}.mod
+      ${NRN_NOCMODL_SANITIZER_ENVIRONMENT} ${CORENRN_NMODL_BINARY}
+      ${PROJECT_SOURCE_DIR}/${modfile_basename}.mod --neuron -o ${modfile_output_dir}
     COMMAND sed ${NOCMODL_SED_EXPR} ${PROJECT_SOURCE_DIR}/${modfile_basename}.cpp >
             ${PROJECT_BINARY_DIR}/${modfile_basename}.cpp
     COMMAND ${CMAKE_COMMAND} -E ${REMOVE_CMAKE_COMMAND}
             ${PROJECT_SOURCE_DIR}/${modfile_basename}.cpp
     DEPENDS nocmodl ${PROJECT_SOURCE_DIR}/${modfile_basename}.mod
-            ${PROJECT_BINARY_DIR}/share/nrn/lib/nrnunits.lib
+            ${PROJECT_BINARY_DIR}/share/nrn/lib/nrnunits.lib ${CORENRN_NMODL_BINARY}
     WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/src/nrniv)
 endmacro()