--- 25.6-Makefile	2025-11-05 15:05:30.203827000 +0000
+++ 25.9-Makefile	2025-11-05 15:05:42.078025000 +0000
@@ -1,10 +1,10 @@
-# 23dec24 Software Lab. Alexander Burger
+# 13sep25 Software Lab. Alexander Burger
 
 .SILENT:
 
 CC = clang
-PIL = ../pil  # pil
-ASM = opt -O2  # llvm-as
+PIL = ../pil
+ASM = opt -O2
 LLC = llc
 LINK = llvm-link
 SHARED = -shared
@@ -25,6 +25,7 @@
 SRC = main.l gc.l big.l sym.l io.l db.l apply.l flow.l subr.l
 
 all: $(LIB)/sysdefs $(BIN)/picolisp $(LIB)/ext.so $(LIB)/ht.so $(BIN)/balance $(BIN)/ssl $(BIN)/httpGate
+so: $(LIB)/picolisp.so
 
 # System definitions
 $(LIB)/sysdefs: sysdefs.c
@@ -32,7 +33,7 @@
 
 # Base system
 $(BIN)/picolisp: picolisp.bc
-	mkdir -p $(BIN) $(LIB)
+	mkdir -p $(BIN)
 	$(LLC) picolisp.bc -relocation-model=pic -o picolisp.s
 	$(CC) picolisp.s -o $(BIN)/picolisp -rdynamic -lc -lutil -lm -ldl `pkg-config --libs readline libffi`
 	$(STRIP) $(BIN)/picolisp
@@ -43,12 +44,31 @@
 base.bc: base.ll
 	$(ASM) -o base.bc base.ll
 
-base.ll: $(INC) $(SRC)
-	$(PIL) lib/llvm.l main.l -bye > base.ll
+base.ll: $(INC) $(SRC) lib/ex.l
+	$(PIL) lib/llvm.l lib/ex.l main.l -bye > base.ll
 	mv base.map $(LIB)/map
 
 lib.bc: pico.h lib.c
-	$(CC) -O3 -w -c -o lib.bc -D_OS='"$(OS)"' -D_CPU='"$(CPU)"' `pkg-config --cflags libffi` -emit-llvm lib.c
+	$(CC) -O3 -w -c -o lib.bc -D_OS='"$(OS)"' -D_CPU='"$(CPU)"' -emit-llvm lib.c
+
+# Base system as shared library
+$(LIB)/picolisp.so: picolisp.so.bc
+	$(LLC) picolisp.so.bc -relocation-model=pic -o picolisp.so.s
+	$(CC) picolisp.so.s -o $(LIB)/picolisp.so $(SHARED)
+	$(STRIP) $(LIB)/picolisp.so
+
+picolisp.so.bc: base.so.bc lib.so.bc
+	$(LINK) -o picolisp.so.bc base.so.bc lib.so.bc
+
+base.so.bc: base.so.ll
+	$(ASM) -o base.so.bc base.so.ll
+
+base.so.ll: $(INC) $(SRC) lib/so.l
+	$(PIL) lib/llvm.l -quiche lib/so.l main.l -bye > base.so.ll
+	rm base.map
+
+lib.so.bc: pico.h lib.so.c
+	$(CC) -O3 -w -c -fPIC -o lib.so.bc -D_OS='"$(OS)"' -D_CPU='"$(CPU)"' -emit-llvm lib.so.c
 
 # Extension libraries
 $(LIB)/ext.so: ext.bc