Improve SConstruct file to improve compatability and expose the compiledb.

SConstruct

@@ -26,7 +26,7 @@ opts.AddVariables(
 )
 
 env = Environment(options = opts,
-                  tools = ['default'],
+                  tools = ['default', 'compilation_db'],
                   ENV = os.environ)
 Help(opts.GenerateHelpText(env))
 
@@ -55,12 +55,11 @@ if 'LDFLAGS' in os.environ:
 #env.Append(CPPFLAGS = [ "-Wall", "-Wformat=2", "-Wextra", "-Wwrite-strings",
 #                        "-Wno-unused-parameter", "-Wmissing-format-attribute",
 #                        "-Werror" ])
-#
 env.Append(CFLAGS = [ "-Wshadow", "-Wno-typedef-redefinition" ])
 #env.Append(CXXFLAGS = [ "-Wno-non-template-friend", "-Woverloaded-virtual",
 #                        "-Wcast-qual", "-Wcast-align", "-Wconversion",
 #                        "-Weffc++", "-std=c++0x", "-Werror" ])
-env.Append(CXXFLAGS = [ "-fno-builtin" ])
+env.Append(CPPFLAGS = [ "-fno-builtin", "-fno-stack-protector" ])
 
 if env["WITH_GPROF"] == "1":
     env.Append(CPPFLAGS = [ "-pg" ])
@@ -153,10 +152,16 @@ if not conf.CheckCXX():
     print('Your C++ compiler and/or environment is incorrectly configured.')
     CheckFailed()
 
+if not env["CCVERSION"].startswith("15."):
+    print('Only Clang 15 is supported')
+    print('You are running: ' + env["CCVERSION"])
+    CheckFailed()
+
 conf.Finish()
 
 Export('env')
 
+
 # Program start/end
 env["CRTBEGIN"] = [ "#build/lib/libc/crti.o", "#build/lib/libc/crt1.o" ]
 env["CRTEND"] = [ "#build/lib/libc/crtn.o" ]
@@ -192,6 +197,8 @@ env["CXX"] = "c++"
 env["LINK"] = "cc"
 SConscript('sbin/newfs_o2fs/SConscript', variant_dir='build/tools/newfs_o2fs')
 
+env.CompilationDatabase()
+
 # Install Targets
 env.Install('$PREFIX/','build/sys/castor')
 env.Alias('install','$PREFIX')