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-rw-r--r--tools/scripts/Makefile.include150
1 files changed, 150 insertions, 0 deletions
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
new file mode 100644
index 000000000..a3f99ef6b
--- /dev/null
+++ b/tools/scripts/Makefile.include
@@ -0,0 +1,150 @@
+# SPDX-License-Identifier: GPL-2.0
+ifneq ($(O),)
+ifeq ($(origin O), command line)
+ dummy := $(if $(shell cd $(PWD); test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
+ ABSOLUTE_O := $(shell cd $(PWD); cd $(O) ; pwd)
+ OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
+ COMMAND_O := O=$(ABSOLUTE_O)
+ifeq ($(objtree),)
+ objtree := $(O)
+endif
+endif
+endif
+
+# check that the output directory actually exists
+ifneq ($(OUTPUT),)
+OUTDIR := $(shell cd $(OUTPUT) && pwd)
+$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
+endif
+
+#
+# Include saner warnings here, which can catch bugs:
+#
+EXTRA_WARNINGS := -Wbad-function-cast
+EXTRA_WARNINGS += -Wdeclaration-after-statement
+EXTRA_WARNINGS += -Wformat-security
+EXTRA_WARNINGS += -Wformat-y2k
+EXTRA_WARNINGS += -Winit-self
+EXTRA_WARNINGS += -Wmissing-declarations
+EXTRA_WARNINGS += -Wmissing-prototypes
+EXTRA_WARNINGS += -Wnested-externs
+EXTRA_WARNINGS += -Wno-system-headers
+EXTRA_WARNINGS += -Wold-style-definition
+EXTRA_WARNINGS += -Wpacked
+EXTRA_WARNINGS += -Wredundant-decls
+EXTRA_WARNINGS += -Wstrict-prototypes
+EXTRA_WARNINGS += -Wswitch-default
+EXTRA_WARNINGS += -Wswitch-enum
+EXTRA_WARNINGS += -Wundef
+EXTRA_WARNINGS += -Wwrite-strings
+EXTRA_WARNINGS += -Wformat
+
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+ $(if $(or $(findstring environment,$(origin $(1))),\
+ $(findstring command line,$(origin $(1)))),,\
+ $(eval $(1) = $(2)))
+endef
+
+ifneq ($(LLVM),)
+$(call allow-override,CC,clang)
+$(call allow-override,AR,llvm-ar)
+$(call allow-override,LD,ld.lld)
+$(call allow-override,CXX,clang++)
+$(call allow-override,STRIP,llvm-strip)
+else
+# Allow setting various cross-compile vars or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,LD,$(CROSS_COMPILE)ld)
+$(call allow-override,CXX,$(CROSS_COMPILE)g++)
+$(call allow-override,STRIP,$(CROSS_COMPILE)strip)
+endif
+
+CC_NO_CLANG := $(shell $(CC) -dM -E -x c /dev/null | grep -Fq "__clang__"; echo $$?)
+
+ifneq ($(LLVM),)
+HOSTAR ?= llvm-ar
+HOSTCC ?= clang
+HOSTLD ?= ld.lld
+else
+HOSTAR ?= ar
+HOSTCC ?= gcc
+HOSTLD ?= ld
+endif
+
+ifeq ($(CC_NO_CLANG), 1)
+EXTRA_WARNINGS += -Wstrict-aliasing=3
+endif
+
+# Hack to avoid type-punned warnings on old systems such as RHEL5:
+# We should be changing CFLAGS and checking gcc version, but this
+# will do for now and keep the above -Wstrict-aliasing=3 in place
+# in newer systems.
+# Needed for the __raw_cmpxchg in tools/arch/x86/include/asm/cmpxchg.h
+#
+# See https://lkml.org/lkml/2006/11/28/253 and https://gcc.gnu.org/gcc-4.8/changes.html,
+# that takes into account Linus's comments (search for Wshadow) for the reasoning about
+# -Wshadow not being interesting before gcc 4.8.
+
+ifneq ($(filter 3.%,$(MAKE_VERSION)),) # make-3
+EXTRA_WARNINGS += -fno-strict-aliasing
+EXTRA_WARNINGS += -Wno-shadow
+else
+EXTRA_WARNINGS += -Wshadow
+endif
+
+ifneq ($(findstring $(MAKEFLAGS), w),w)
+PRINT_DIR = --no-print-directory
+else
+NO_SUBDIR = :
+endif
+
+ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
+ silent=1
+endif
+
+#
+# Define a callable command for descending to a new directory
+#
+# Call by doing: $(call descend,directory[,target])
+#
+descend = \
+ +mkdir -p $(OUTPUT)$(1) && \
+ $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
+
+QUIET_SUBDIR0 = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
+QUIET_SUBDIR1 =
+
+ifneq ($(silent),1)
+ ifneq ($(V),1)
+ QUIET_CC = @echo ' CC '$@;
+ QUIET_CC_FPIC = @echo ' CC FPIC '$@;
+ QUIET_CLANG = @echo ' CLANG '$@;
+ QUIET_AR = @echo ' AR '$@;
+ QUIET_LINK = @echo ' LINK '$@;
+ QUIET_MKDIR = @echo ' MKDIR '$@;
+ QUIET_GEN = @echo ' GEN '$@;
+ QUIET_SUBDIR0 = +@subdir=
+ QUIET_SUBDIR1 = ;$(NO_SUBDIR) \
+ echo ' SUBDIR '$$subdir; \
+ $(MAKE) $(PRINT_DIR) -C $$subdir
+ QUIET_FLEX = @echo ' FLEX '$@;
+ QUIET_BISON = @echo ' BISON '$@;
+
+ descend = \
+ +@echo ' DESCEND '$(1); \
+ mkdir -p $(OUTPUT)$(1) && \
+ $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
+
+ QUIET_CLEAN = @printf ' CLEAN %s\n' $1;
+ QUIET_INSTALL = @printf ' INSTALL %s\n' $1;
+ QUIET_UNINST = @printf ' UNINST %s\n' $1;
+ endif
+endif
+
+pound := \#