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| author | Martin Liska <mliska@suse.cz> | 2015-05-26 17:23:24 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-27 17:21:45 +0200 |
| commit | e8b7ea4356fdd3c4de5478f3418eb84f8dce2b61 (patch) | |
| tree | d2bf5a7559f566ed71f93ae81671360eac42cd3d | |
| parent | perf tools: Assign default value for some pointers (diff) | |
| download | linux-e8b7ea4356fdd3c4de5478f3418eb84f8dce2b61.tar.xz linux-e8b7ea4356fdd3c4de5478f3418eb84f8dce2b61.zip | |
perf tools: Improve setting of gcc debug option
Correct debugging experience is given by passing -Og to compiler.
Do it in a way that supports older compilers
Signed-off-by: Martin Liska <mliska@suse.cz>
Acked-by: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/5564393C.1090104@suse.cz
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/config/Makefile | 2 | ||||
| -rw-r--r-- | tools/perf/config/utilities.mak | 19 |
2 files changed, 21 insertions, 0 deletions
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index e3b3724e73ff..317001c94660 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -130,6 +130,8 @@ endif ifeq ($(DEBUG),0) CFLAGS += -O6 +else + CFLAGS += $(call cc-option,-Og,-O0) endif ifdef PARSER_DEBUG diff --git a/tools/perf/config/utilities.mak b/tools/perf/config/utilities.mak index c16ce833079c..0ebef09c0842 100644 --- a/tools/perf/config/utilities.mak +++ b/tools/perf/config/utilities.mak @@ -177,3 +177,22 @@ $(if $($(1)),$(call _ge_attempt,$($(1)),$(1)),$(call _ge_attempt,$(2))) endef _ge_attempt = $(if $(get-executable),$(get-executable),$(call _gea_err,$(2))) _gea_err = $(if $(1),$(error Please set '$(1)' appropriately)) + +# try-run +# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) +# Exit code chooses option. "$$TMP" is can be used as temporary file and +# is automatically cleaned up. +try-run = $(shell set -e; \ + TMP="$(TMPOUT).$$$$.tmp"; \ + TMPO="$(TMPOUT).$$$$.o"; \ + if ($(1)) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f "$$TMP" "$$TMPO") + +# cc-option +# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) + +cc-option = $(call try-run,\ + $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) |