These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / perf / config / utilities.mak

diff --git a/kernel/tools/perf/config/utilities.mak b/kernel/tools/perf/config/utilities.mak
index c16ce83..0ebef09 100644 (file)
--- a/kernel/tools/perf/config/utilities.mak
+++ b/kernel/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))