Refs #127. Generate DLL without a version suffix on Windows.

Makefile

@@ -99,11 +99,9 @@ ifeq ($(OSNAME), Darwin)
 endif
 ifeq ($(OSNAME), WINNT)
 	$(MAKE) -C exports dll
-	-ln -fs $(LIBDLLNAME) $(LIBPREFIX).dll
 endif
 ifeq ($(OSNAME), CYGWIN_NT)
 	$(MAKE) -C exports dll
-	-ln -fs $(LIBDLLNAME) $(LIBPREFIX).dll
 endif
 
 tests :

Makefile.system

@@ -724,8 +724,8 @@ endif
 endif
 
 
+LIBDLLNAME   = $(LIBPREFIX).dll
 LIBSONAME    = $(LIBNAME:.$(LIBSUFFIX)=.so)
-LIBDLLNAME   = $(LIBNAME:.$(LIBSUFFIX)=.dll)
 LIBDYNNAME   = $(LIBNAME:.$(LIBSUFFIX)=.dylib)
 LIBDEFNAME   = $(LIBNAME:.$(LIBSUFFIX)=.def)
 LIBEXPNAME   = $(LIBNAME:.$(LIBSUFFIX)=.exp)

exports/Makefile

@@ -66,6 +66,11 @@ dll  : ../$(LIBDLLNAME)
 
 dll2 : libgoto2_shared.dll
 
+# On Windows, we only generate a DLL without a version suffix.  This is because
+# applications which link against the dynamic library reference a fixed DLL name
+# in their import table.  By instead using a stable name it is possible to
+# upgrade between library versions, without needing to re-link an application.
+# For more details see: https://github.com/xianyi/OpenBLAS/issues/127.
 ../$(LIBDLLNAME) : ../$(LIBNAME) libopenblas.def dllinit.$(SUFFIX)
 	$(RANLIB) ../$(LIBNAME)
 ifeq ($(BINARY32), 1)