Don't build static libs by default

I believe many of the incorrect dependency problems are due to building
static libs, which don't contain any dependency info.

If needed, these can be enabled with --enable-static (for autotools) or
-DBUILD_SHARED_LIBS=OFF (for cmake).

CHANGES

@@ -31,6 +31,8 @@ arpack-ng - 3.8.0
 
 [ Kyle Guinn ]
  * [BUG FIX]: fix 'eval: Syntax error: "(" unexpected' error at build time.
+ * Only build shared libraries by default.  To build static libraries, use
+   --enable-static (autotools) or -DBUILD_SHARED_LIBS=OFF (cmake).
 
 [ David Schwörer ]
  * Support of gfortran 10

CMakeLists.txt

@@ -15,6 +15,7 @@ if (POLICY CMP0042)
   cmake_policy (SET CMP0042 NEW)
 endif ()
 
+option(BUILD_SHARED_LIBS "Build shared libraries instead of static libraries" ON)
 option(MPI "Enable parallel support" OFF)
 option(ICB "Enable support for *[ae]upd_c with ISO_C_BINDING" OFF)
 option(ICBEXMM "Enable support for matrix market example based on ICB" OFF)

configure.ac

@@ -46,7 +46,7 @@ ifdef([LT_INIT], [], [
   m4exit([1])])
 
 LT_PREREQ([2.4.2])
-LT_INIT([win32-dll])
+LT_INIT([win32-dll disable-static])
 
 dnl See if compiling parpack
 AC_ARG_ENABLE([mpi],