Remove -O[0123s] gcc optimization flags for gcc pass 4 speedups again.

We cannot guarantee that (un)optimized code compiles and/or generates
fully functional code, so don't tempt the user to try it out.

* session.h (struct systemtap_session): Remove gcc_flags string field.
* hash.cxx (find_script_hash): Don't add gcc_flags.
* main.cxx (usage): Remove -O[0123s] documentation.
(main): Don't use gcc_flags.
* buildrun.cxx (compile_pass): Don't add gcc_flags to EXTRA_CFLAGS.
* stap1.in: Remove -O[0123s] documentation.
* testsuite/systemtap.base/cache.exp: Remove tests for -O[0123s].

1 files changed, 0 insertions, 3 deletions

diff --git a/session.h b/session.h
index 32004410..a617e47f 100644
--- a/session.h
+++ b/session.h
@@ -135,9 +135,6 @@ struct systemtap_session
   // Skip bad $ vars
   bool skip_badvars;
 
-  // Optimization flag passed to gcc -O[0123s]
-  std::string gcc_flags;
-
   // NB: It is very important for all of the above (and below) fields
   // to be cleared in the systemtap_session ctor (elaborate.cxx)
   // and/or main.cxx(main).