diff options
| -rw-r--r-- | scripts/Kbuild.include | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 074d2db045..838ab11e7c 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 #### # kbuild: Generic definitions @@ -24,10 +25,18 @@ depfile = $(subst $(comma),_,$(dot-target).d) 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 := : quiet_kecho := echo @@ -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 |