add build parameters

pygomx-module/Makefile

@@ -1,16 +1,54 @@
+# set some defaults
+
+# one of static, shared
+ifndef BUILD_MODE
+  BUILD_MODE = static
+endif
+
+# one of none, colm, goolm, vodozemac
+ifndef OLM_FLAVOUR
+  OLM_FLAVOUR = colm
+endif
+
+
+# calculate configuration matrix
+
+ifeq ($(BUILD_MODE),static)
+  build_mode_name=c-archive
+  build_mode_ext=a
+else ifeq ($(BUILD_MODE),shared)
+  build_mode_name=c-shared
+  build_mode_ext=so
+else
+  $(error unknown BUILD_MODE $(BUILD_MODE))
+endif
+
+link_list =
+
+ifeq ($(BUILD_MODE),static)
+  ifeq ($(OLM_FLAVOUR),colm)
+    link_list += olm
+  endif
+endif
+
+
 SOURCE_GO=$(shell find ../libmxclient/ -iname "*.go")
 
+ifndef GO_OUTDIR
+  GO_OUTDIR = ../pygomx-module
+endif
+
 .PHONY:
 all: _pygomx.o libmxclient.h
 	mkdir -p build/lib
 	cp *.so build/lib
 
 _pygomx.o: libmxclient.h build_ffi.py
-	python3 build_ffi.py
+	python3 build_ffi.py $(link_list)
 
 libmxclient.h: ../libmxclient/go.mod ../libmxclient/go.sum $(SOURCE_GO)
 	cd ../libmxclient/ && \
-	CGO_ENABLED=1 go build -buildmode=c-archive -o ../pygomx-module/libmxclient.a .
+	CGO_ENABLED=1 go build -buildmode=$(build_mode_name) -o $(GO_OUTDIR)/libmxclient.$(build_mode_ext) .
 
 .PHONY:
 clean:

pygomx-module/build_ffi.py

@@ -1,6 +1,16 @@
 #!/usr/bin/python
+import sys
 from cffi import FFI
 
+lib_list = [
+    "mxclient",
+]
+
+if len(sys.argv) > 1:
+    lib_list += sys.argv[1:]
+
+print(f"liblist: {lib_list}")
+
 ffibuilder = FFI()
 
 ffibuilder.set_source(
@@ -8,7 +18,7 @@ ffibuilder.set_source(
     source=""" //passed to the real C compiler
         #include "libmxclient.h"
     """,
-    libraries=["mxclient", "olm"],
+    libraries=lib_list,
     library_dirs=["."],
     include_dirs=["."],
 )