nmi_backtrace: generate one-line reports for idle cpus
[cascardo/linux.git] / scripts / Makefile.gcc-plugins
1 ifdef CONFIG_GCC_PLUGINS
2   __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
3   PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
4
5   SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
6
7   gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)        += cyc_complexity_plugin.so
8
9   ifdef CONFIG_GCC_PLUGIN_SANCOV
10     ifeq ($(CFLAGS_KCOV),)
11       # It is needed because of the gcc-plugin.sh and gcc version checks.
12       gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so
13
14       ifneq ($(PLUGINCC),)
15         CFLAGS_KCOV := $(SANCOV_PLUGIN)
16       else
17         $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
18       endif
19     endif
20   endif
21
22   GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
23
24   export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR SANCOV_PLUGIN
25
26   ifneq ($(PLUGINCC),)
27     # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
28     GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
29   endif
30
31   KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
32   GCC_PLUGIN := $(gcc-plugin-y)
33   GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
34 endif
35
36 # If plugins aren't supported, abort the build before hard-to-read compiler
37 # errors start getting spewed by the main build.
38 PHONY += gcc-plugins-check
39 gcc-plugins-check: FORCE
40 ifdef CONFIG_GCC_PLUGINS
41   ifeq ($(PLUGINCC),)
42     ifneq ($(GCC_PLUGINS_CFLAGS),)
43       ifeq ($(call cc-ifversion, -ge, 0405, y), y)
44         $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
45         @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
46       else
47         @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5" >&2 && exit 1
48       endif
49     endif
50   endif
51 endif
52         @:
53
54 # Actually do the build, if requested.
55 PHONY += gcc-plugins
56 gcc-plugins: scripts_basic gcc-plugins-check
57 ifdef CONFIG_GCC_PLUGINS
58         $(Q)$(MAKE) $(build)=scripts/gcc-plugins
59 endif
60         @: