More random cherry-picks for scripts/Kbuild.include
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/Kbuild.include | 42 ++++++++++++++++++++++--------------------
1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 074d2db04..838ab11e7 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
####
# kbuild: Generic definitions
@@ -23,10 +24,18 @@ depfile = $(subst $(comma),_,$(dot-target).d)
# filename of target with directory and extension stripped
basetarget = $(basename $(notdir $@))
+###
+# real prerequisites without phony targets
+real-prereqs = $(filter-out $(PHONY), $^)
+
###
# Escape single quote for use in echo statements
escsq = $(subst $(squote),'\$(squote)',$1)
+###
+# Quote a string to pass it to C files. foo => '"foo"'
+stringify = $(squote)$(quote)$1$(quote)$(squote)
+
###
# Easy method for doing a status message
kecho := :
@@ -62,18 +71,19 @@ endef
######
# gcc support functions
-# See documentation in Documentation/kbuild/makefiles.txt
+# See documentation in Documentation/kbuild/makefiles.rst
# cc-cross-prefix
# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
-# Return first prefix where a prefix$(CC) is found in PATH.
-# If no $(CC) found in PATH with listed prefixes return nothing
-cc-cross-prefix = \
- $(word 1, $(foreach c,$(1), \
- $(shell set -e; \
- if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
- echo $(c); \
- fi)))
+# Return first <prefix> where a <prefix>gcc is found in PATH.
+# If no gcc found in PATH with listed prefixes return nothing
+#
+# Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it
+# would try to directly execute the shell builtin 'command'. This workaround
+# should be kept for a long time since this issue was fixed only after the
+# GNU Make 4.2.1 release.
+cc-cross-prefix = $(firstword $(foreach c, $(1), \
+ $(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c))))
# output directory for tests below
TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
@@ -138,18 +148,13 @@ ld-option = $(call try-run,\
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
# Usage:
# $(Q)$(MAKE) $(build)=dir
-build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
+build := -f $(srctree)/scripts/Makefile.build obj
###
-# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
-# Usage:
-# $(Q)$(MAKE) $(modbuiltin)=dir
-modbuiltin := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.modbuiltin obj
-
-# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
+# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
# Usage:
# $(Q)$(MAKE) $(clean)=dir
-clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
+clean := -f $(srctree)/scripts/Makefile.clean obj
# Prefix -I with $(srctree) if it is not an absolute path.
# skip if -I has no parameter
@@ -167,9 +172,6 @@ echo-cmd = $(if $($(quiet)cmd_$(1)),\
# printing commands
cmd = @set -e; $(echo-cmd) $(cmd_$(1))
-# Add $(obj)/ for paths that are not absolute
-objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
-
###
# if_changed - execute command if any prerequisite is newer than
# target, or command line has changed
--
2.25.1
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