From 5a5732e52738b4f00995e705a170230c106885b6 Mon Sep 17 00:00:00 2001 From: Mark Wielaard Date: Sat, 11 Jul 2009 19:59:42 +0200 Subject: Add -O[0123s] gcc optimization flags for gcc pass 4 speedup. * session.h (struct systemtap_session): Add gcc_flags string field. * main.cxx (usage): Document -O[0123s]. (main): Default gcc_flags to -O0. Add O:: to getopt_long. Handle case 'O' to set gcc_flags. * buildrun.cxx (compile_pass): Add gcc_flags to EXTRA_CFLAGS. * stap1.in: Add -O[0123s] documentation. * testsuite/systemtap.base/cache.exp: Add tests for -O[0123s]. --- stap.1.in | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'stap.1.in') diff --git a/stap.1.in b/stap.1.in index 7736a612..1a287a3e 100644 --- a/stap.1.in +++ b/stap.1.in @@ -183,6 +183,13 @@ Send standard output to named file. In bulk mode, percpu files will start with FILE_ (FILE_cpu with -F) followed by the cpu number. This supports strftime(3) formats for FILE. .TP +.BI \-O[0123s] +Optimization to use for C code. Passed to gcc in pass 4. -O is an +alias for -O1, -O0 enables fast compilation, -O1 optimizes the code and +takes a bit more time, -O2 optimizes more and takes more time, -O3 +optimizes even more and takes even more time, -Os optimizes for size, +like -O2 but tuned for small code size. The default is -O0. +.TP .BI \-c " CMD" Start the probes, run CMD, and exit when CMD finishes. .TP -- cgit