Also build a shared library

SConstruct

@@ -9,6 +9,9 @@ version_info =  {
     'version_minor':  0 ,
     'version_patch':  0 ,
     'version_revision': revision,
+#version_abi is the abi version of the shared library. Only bump it when
+#backwards compatibility breaks. Strive to not break the ABI.
+    'version_abi':    '1.0.0' 
 }
 version_info['version_str'] = "%d.%d.%d.%s" % (
     version_info['version_major'],
@@ -99,6 +102,7 @@ env.Append(CFLAGS = ['-Wno-unused-parameter', '-Werror=implicit-function-declara
 env.Append(LINKFLAGS = ['-O2', '-pthread'])
 env.Append(CPPDEFINES = ['_FILE_OFFSET_BITS=64'])
 env.Append(CPPPATH = ['#include'])
+env.Append(SHLIBVERSION = version_info['version_abi'])
 
 if GetOption('force32bit'):
     env.Append(CFLAGS = ['-m32'])

src/SConscript

@@ -13,9 +13,11 @@ sources = ucore_env.Glob('*.c')
 #print 'sources:', sources[len(sources)-2]
 
 #Build library
-ucore_lib = ucore_env.StaticLibrary(target='ucore' + lib_suffix , source=sources)
+ucore_staticlib = ucore_env.StaticLibrary(target='ucore' + lib_suffix , source=sources)
+ucore_sharedlib = ucore_env.SharedLibrary(target='ucore' + lib_suffix , source=sources)
 
 #install targets
 ucore_env.Alias('install', 
-    ucore_env.Install(os.path.join(prefix, 'lib'), ucore_lib))
-
+    ucore_env.Install(os.path.join(prefix, 'lib'), [ucore_staticlib]))
+ucore_env.Alias('install', 
+    ucore_env.InstallVersionedLib(os.path.join(prefix, 'lib'), [ucore_sharedlib]))

test/SConscript

@@ -23,6 +23,9 @@ test_executable = 'test_runner'
 if test_xml:
     test_executable += ' -x'
 
+#rpath to shared lib, so test_runner can actually be executed
+test_env.Append(LINKFLAGS = ['-Wl,-rpath,\\$$ORIGIN/../src'])
+
 prog = test_env.Program('test_runner', tests)
 cmd  = test_env.Command(target='test_phony' , 
                             source = None,