Explicitly request gcc for the test

Author: loonycyborg

test/CXX/CXX-modules-fixture/SConstruct

@@ -1,4 +1,8 @@
 env = Environment()
+try:
+    env.Tool(ARGUMENTS["toolset"])
+except KeyError:
+    pass
 
 env.Append(CXXFLAGS = ["-std=c++20"])
 env['CXXMODULEPATH'] = "cxx-scons-modules"

test/CXX/CXXMODULES-gcc.py

@@ -4,7 +4,7 @@
 
 test.dir_fixture("CXX-modules-fixture")
 
-test.run(arguments = ".")
+test.run(arguments = ". toolset=g++")
 
 test.pass_test()