[Test] Use Cantera shared library for tests, when possible

On Linux systems, link tests against the Cantera shared library, rather than the
static library to reduce the size of the compiled test suite. This saves over 1
GB of disk space when compiling with debug symbols enabled, and also reduces the
run time of the test suite.

This does not work on Windows, where the shared library only exports the Cantera
C interface.

test/SConscript

@@ -5,9 +5,16 @@ from xml.etree import ElementTree
 Import('env','build','install')
 localenv = env.Clone()
 
+# Where possible, link tests against the shared libraries to minimize the sizes
+# of the resulting binaries.
+if localenv['OS'] == 'Linux':
+    cantera_libs = localenv['cantera_shared_libs']
+else:
+    cantera_libs = localenv['cantera_libs']
+
 localenv.Prepend(CPPPATH=['#ext/gtest/include', '#include'],
                  LIBPATH='#build/lib')
-localenv.Append(LIBS=['gtest'] + localenv['cantera_libs'],
+localenv.Append(LIBS=['gtest'] + cantera_libs,
                 CCFLAGS=env['warning_flags'])
 
 # Turn of optimization to speed up compilation
@@ -22,9 +29,11 @@ localenv['ENV']['CANTERA_DATA'] = Dir('#build/data').abspath
 PASSED_FILES = {}
 
 # Needed for Intel runtime libraries when compiling with ICC
-if 'LD_LIBRARY_PATH' in os.environ:
-    localenv['ENV']['LD_LIBRARY_PATH'] = os.environ['LD_LIBRARY_PATH']
-
+# Add build/lib in order to find Cantera shared library
+if localenv['ENV'].get('LD_LIBRARY_PATH'):
+    localenv['ENV']['LD_LIBRARY_PATH'] += os.pathsep + Dir('#build/lib').abspath
+else:
+    localenv['ENV']['LD_LIBRARY_PATH'] = Dir('#build/lib').abspath
 
 def addTestProgram(subdir, progName, env_vars={}):
     """

test_problems/SConscript

@@ -12,6 +12,13 @@ for optimize_flag in ('-O3', '-O2', '/O2'):
         ccflags.remove(optimize_flag)
 localenv['CCFLAGS'] = ccflags
 
+# Where possible, link tests against the shared libraries to minimize the sizes
+# of the resulting binaries.
+if localenv['OS'] == 'Linux':
+    cantera_libs = localenv['cantera_shared_libs']
+else:
+    cantera_libs = localenv['cantera_libs']
+
 if localenv['python_package'] in ('full', 'minimal'):
     localenv['ENV']['PYTHONPATH'] = localenv['pythonpath_build2']
     localenv['ENV']['PYTHON_CMD'] = localenv.subst('$python_cmd')
@@ -25,6 +32,12 @@ else:
 
 localenv['ENV']['CANTERA_DATA'] = pjoin(os.getcwd(), '..', 'build', 'data')
 
+# Add build/lib in order to find Cantera shared library
+if localenv['ENV'].get('LD_LIBRARY_PATH'):
+    localenv['ENV']['LD_LIBRARY_PATH'] += os.pathsep + Dir('#build/lib').abspath
+else:
+    localenv['ENV']['LD_LIBRARY_PATH'] = Dir('#build/lib').abspath
+
 PASSED_FILES = {}
 
 
@@ -122,7 +135,7 @@ class CompileAndTest(Test):
     def run(self, env):
         prog = env.Program(pjoin(self.subdir, self.programName),
                            mglob(env, self.subdir, *self.extensions),
-                           LIBS=env['cantera_libs'])
+                           LIBS=cantera_libs)
         source = [prog]
         return Test.run(self, env, *source)
 
@@ -135,7 +148,7 @@ class CompileAndTest(Test):
 
 dhGraph = localenv.Program('cathermo/DH_graph_1/DH_graph_1',
                            mglob(env, 'cathermo/DH_graph_1', 'cpp'),
-                           LIBS=env['cantera_libs'])
+                           LIBS=cantera_libs)
 dhGraph_name = dhGraph[0].name
 
 Test('DH_graph_dilute',
@@ -255,7 +268,7 @@ CompileAndTest('cxx_ex', 'cxx_ex', 'cxx_examples', 'output_blessed.txt',
 
 diamond = localenv.Program('diamondSurf/runDiamond',
                            'diamondSurf/runDiamond.cpp',
-                           LIBS=env['cantera_libs'])
+                           LIBS=cantera_libs)
 diamond_name = diamond[0].name
 Test('diamondSurf-xml', 'diamondSurf', diamond, 'runDiamond_blessed.out',
      options='diamond_blessed.xml', artifacts=diamond_name)
@@ -271,7 +284,7 @@ CompileAndTest('multiGasTransport',
 
 negA = localenv.Program('negATest/negATest',
                            mglob(env, 'negATest', 'cpp'),
-                           LIBS=env['cantera_libs'])
+                           LIBS=cantera_libs)
 negA_name = negA[0].name
 Test('negA-xml', 'negATest', negA, 'negATest_blessed.out',
      options='noxNeg_blessed.xml', artifacts=negA_name)