* Add -fPIC to CFLAGS because most of this code ends up in a library.

* Add a soname to the library.

* Use nested if instead of "else ifeq" syntax for compatibility with
  older versions of make.

* mkdir -p the BINDIR.

--- chibi-scheme-0.2/Makefile
+++ chibi-scheme-0.2/Makefile
@@ -24,7 +24,8 @@
 EXE =
 CLIBFLAGS = -dynamiclib
 STATICFLAGS = -static-libgcc
-else ifeq ($(PLATFORM),mingw)
+else
+ifeq ($(PLATFORM),mingw)
 SO  = .dll
 EXE = .exe
 CLIBFLAGS = -fPIC shared
@@ -34,6 +35,7 @@
 CLIBFLAGS = -fPIC -shared
 STATICFLAGS = -static
 endif
+endif
 
 ifdef USE_BOEHM
 GCLDFLAGS := -lgc
@@ -44,7 +46,7 @@
 endif
 
 XLDFLAGS  := $(LDFLAGS) $(GCLDFLAGS) -lm
-XCFLAGS   := -Wall -O2 -g $(CFLAGS)
+XCFLAGS   := -Wall -O2 -g -fPIC $(CFLAGS)
 
 INCLUDES = include/chibi/sexp.h include/chibi/config.h include/chibi/install.h
 
@@ -61,7 +63,7 @@
 	$(CC) -c $(XCPPFLAGS) $(XCFLAGS) -o $@ $<
 
 libchibi-scheme$(SO): eval.o sexp.o
-	$(CC) $(CLIBFLAGS) -o $@ $^ $(XLDFLAGS)
+	$(CC) $(CLIBFLAGS) -o $@ $^ $(XLDFLAGS) -Wl,-soname=$@
 
 chibi-scheme$(EXE): main.o libchibi-scheme$(SO)
 	$(CC) $(XCPPFLAGS) $(XCFLAGS) -o $@ $< -L. -lchibi-scheme
@@ -90,6 +92,7 @@
 	./chibi-scheme tests/r5rs-tests.scm
 
 install: chibi-scheme
+	mkdir -p $(BINDIR)
 	cp chibi-scheme $(BINDIR)/
 	mkdir -p $(MODDIR)
 	cp init.scm $(MODDIR)/