Dynamically resolved c functions

.clangd

@@ -1,4 +1,4 @@
 CompileFlags:
-  Add: [-DUMKA_BUILD -DUMKA_EXT_LIBS]
+  Add: [-DUMKA_BUILD -DUMKA_EXT_LIBS -DUMKA_FFI -I../libffi/build/include]
 InlayHints:
   Enabled: No

.github/workflows/main-ffi.yml

@@ -0,0 +1,42 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI (FFI)
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ macos-latest, ubuntu-latest ]
+
+    # The operating system of the runner the job will run on
+    runs-on: ${{ matrix.os }}
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      # prepare system for libffi build
+      - name: install dependencies
+        run: libffi/.ci/install.sh
+
+      # Build it
+      - name: build 
+        run: make all
+        env:
+          UMKA_LIBFFI: 1

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libffi"]
+	path = libffi
+	url = https://github.com/libffi/libffi

Makefile

@@ -13,7 +13,7 @@ BINDIR ?= $(PREFIX)/bin
 
 # platform specific settings:
 ifeq ($(PLATFORM), Linux)
-	LDFLAGS               = -lm -ldl
+	LDFLAGS               = -lm -ldl $(LIBFFI_LD)
 	RANLIB                = ar -crs
 	LIBEXT                = so
 	DYNAMIC_CFLAGS_EXTRA  = -shared -fvisibility=hidden
@@ -29,12 +29,28 @@ else ifneq ($(findstring MINGW64_NT,$(PLATFORM)),)
 	DYNAMIC_CFLAGS_EXTRA  = -shared -fvisibility=hidden
 endif
 
+ifeq ($(UMKA_LIBFFI),)
+	LIBFFI_LIBS	=
+	LIBFFI_LIB	=
+	LIBFFI_LD	=
+	LIBFFI_STATIC  	=
+	LIBFFI_INCLUDE 	=	
+else
+	LIBFFI_LIBS	= ./libffi/build/.libs
+	LIBFFI_LIB	= libffi.a
+	LIBFFI_LD	= -L$(LIBFFI_LIBS) -l:$(LIBFFI_LIB)
+	LIBFFI_STATIC  	= $(LIBFFI_LIBS)/$(LIBFFI_LIB)
+	LIBFFI_INCLUDE 	= ./libffi/build/include
+	LIBFFI_CFLAGS 	= -I$(LIBFFI_INCLUDE) -DUMKA_FFI 
+endif
+
 # identical for all platforms:
 UMKA_LIB_STATIC  = $(BUILD_PATH)/libumka.a
 UMKA_LIB_DYNAMIC = $(BUILD_PATH)/libumka.$(LIBEXT)
 UMKA_EXE = $(BUILD_PATH)/umka
 
-CFLAGS = -s -fPIC -O3 -Wall -Wno-format-security -malign-double -fno-strict-aliasing -DUMKA_EXT_LIBS
+#CFLAGS = -s -fPIC -O3 -Wall -Wno-format-security -malign-double -fno-strict-aliasing -DUMKA_EXT_LIBS
+CFLAGS = -fPIC -ggdb -Wall -Wno-format-security -malign-double -fno-strict-aliasing -DUMKA_EXT_LIBS $(LIBFFI_CFLAGS)
 STATIC_CFLAGS  = $(CFLAGS) -DUMKA_STATIC
 DYNAMIC_CFLAGS = $(CFLAGS) -DUMKA_BUILD $(DYNAMIC_CFLAGS_EXTRA)
 
@@ -80,29 +96,48 @@ uninstall:
 	@rm -f -- $(DESTDIR)$(INCLUDEDIR)/umka_api.h
 	@echo "Uninstallation complete!"
 
-$(UMKA_LIB_STATIC): $(OBJS_STATIC)
+$(UMKA_LIB_STATIC): $(OBJS_STATIC) $(LIBFFI_STATIC)
 	@echo AR $@
 	@mkdir -p -- $(BUILD_PATH)/include/
 	@$(RANLIB) $(UMKA_LIB_STATIC) $^
 	@cp $(APIS) $(BUILD_PATH)/include/
 
-$(UMKA_LIB_DYNAMIC): $(OBJS_DYNAMIC)
+$(UMKA_LIB_DYNAMIC): $(OBJS_DYNAMIC) $(LIBFFI_STATIC)
 	@echo LD $@
 	@mkdir -p -- $(BUILD_PATH)/include/
 	@$(CC) $(DYNAMIC_CFLAGS) -o $(UMKA_LIB_DYNAMIC) $^ $(LDFLAGS)
 	@cp $(APIS) $(BUILD_PATH)/include/
 
-$(UMKA_EXE): $(OBJS_EXE) $(UMKA_LIB_STATIC)
+$(UMKA_EXE): $(OBJS_EXE) $(UMKA_LIB_STATIC) $(LIBFFI_STATIC)
 	@echo LD $@
 	@mkdir -p -- $(dir $@)
 	@$(CC) $(STATIC_CFLAGS) -o $(UMKA_EXE) $^ $(LDFLAGS)
 
-$(OBJ_PATH)/%_static.o: src/%.c
+$(OBJ_PATH)/%_static.o: src/%.c $(LIBFFI_INCLUDE)
 	@echo CC $@
 	@mkdir -p -- $(dir $@)
 	@$(CC) $(STATIC_CFLAGS) -o $@ -c $^
 
-$(OBJ_PATH)/%_dynamic.o: src/%.c
+$(OBJ_PATH)/%_dynamic.o: src/%.c $(LIBFFI_INCLUDE)
 	@echo CC $@
 	@mkdir -p -- $(dir $@)
 	@$(CC) $(DYNAMIC_CFLAGS) -o $@ -c $^
+
+.PHONY: libffi/clean
+libffi/clean:
+	rm -rf libffi/build
+
+libffi/build/.libs/libffi.a: libffi/build/Makefile
+	@cd libffi/build && make
+
+libffi/build/include: libffi/build/Makefile
+libffi/build/Makefile: libffi/configure
+	@mkdir -p -- libffi/build/
+	@cd libffi/build && CC=-fPIC ../configure --enable-pic
+
+libffi/configure: libffi/autogen.sh
+	@cd libffi && ./autogen.sh
+
+libffi/autogen.sh:
+	@git submodule init
+	@git submodule update

src/umka_common.c

@@ -376,7 +376,6 @@ void moduleAddSource(Modules *modules, const char *path, const char *source, boo
     modules->moduleSource[modules->numModuleSources++] = moduleSource;
 }
 
-
 void *moduleGetImplLibFunc(const Module *module, const char *name)
 {
     if (module->implLib)