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authorGravatar Peter Korsgaard <peter@korsgaard.com>2016-09-02 16:20:33 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2016-09-02 16:20:33 +0200
commit7353967690b425fd6519756979f3ef839b1a9cd1 (patch)
treea910fd6b794556251fe607295c631aed98534235 /support/misc
parentcff53ce35b8dab3bbdd9aa4471d1ecb3238c9fab (diff)
parent1bd02bc230e1b3b22ca3eb23fb3dcb91b878283a (diff)
downloadbuildroot-7353967690b425fd6519756979f3ef839b1a9cd1.tar.gz
buildroot-7353967690b425fd6519756979f3ef839b1a9cd1.tar.bz2
Merge branch 'next'
Quite some conflicts, so here goes .. Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'support/misc')
-rw-r--r--support/misc/utils.mk111
1 files changed, 111 insertions, 0 deletions
diff --git a/support/misc/utils.mk b/support/misc/utils.mk
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+################################################################################
+#
+# This file contains various utility macros and variables used about
+# everywhere in make constructs.
+#
+################################################################################
+
+# Strip quotes and then whitespaces
+qstrip = $(strip $(subst ",,$(1)))
+#"))
+
+# Variables for use in Make constructs
+comma := ,
+empty :=
+space := $(empty) $(empty)
+
+# Case conversion macros. This is inspired by the 'up' macro from gmsl
+# (http://gmsl.sf.net). It is optimised very heavily because these macros
+# are used a lot. It is about 5 times faster than forking a shell and tr.
+#
+# The caseconvert-helper creates a definition of the case conversion macro.
+# After expansion by the outer $(eval ), the UPPERCASE macro is defined as:
+# $(strip $(eval __tmp := $(1)) $(eval __tmp := $(subst a,A,$(__tmp))) ... )
+# In other words, every letter is substituted one by one.
+#
+# The caseconvert-helper allows us to create this definition out of the
+# [FROM] and [TO] lists, so we don't need to write down every substition
+# manually. The uses of $ and $$ quoting are chosen in order to do as
+# much expansion as possible up-front.
+#
+# Note that it would be possible to conceive a slightly more optimal
+# implementation that avoids the use of __tmp, but that would be even
+# more unreadable and is not worth the effort.
+
+[FROM] := a b c d e f g h i j k l m n o p q r s t u v w x y z - .
+[TO] := A B C D E F G H I J K L M N O P Q R S T U V W X Y Z _ _
+
+define caseconvert-helper
+$(1) = $$(strip \
+ $$(eval __tmp := $$(1))\
+ $(foreach c, $(2),\
+ $$(eval __tmp := $$(subst $(word 1,$(subst :, ,$c)),$(word 2,$(subst :, ,$c)),$$(__tmp))))\
+ $$(__tmp))
+endef
+
+$(eval $(call caseconvert-helper,UPPERCASE,$(join $(addsuffix :,$([FROM])),$([TO]))))
+$(eval $(call caseconvert-helper,LOWERCASE,$(join $(addsuffix :,$([TO])),$([FROM]))))
+
+# Sanitize macro cleans up generic strings so it can be used as a filename
+# and in rules. Particularly useful for VCS version strings, that can contain
+# slashes, colons (OK in filenames but not in rules), and spaces.
+sanitize = $(subst $(space),_,$(subst :,_,$(subst /,_,$(strip $(1)))))
+
+# MESSAGE Macro -- display a message in bold type
+MESSAGE = echo "$(TERM_BOLD)>>> $($(PKG)_NAME) $($(PKG)_VERSION) $(call qstrip,$(1))$(TERM_RESET)"
+TERM_BOLD := $(shell tput smso 2>/dev/null)
+TERM_RESET := $(shell tput rmso 2>/dev/null)
+
+# Utility functions for 'find'
+# findfileclauses(filelist) => -name 'X' -o -name 'Y'
+findfileclauses = $(call notfirstword,$(patsubst %,-o -name '%',$(1)))
+# finddirclauses(base, dirlist) => -path 'base/dirX' -o -path 'base/dirY'
+finddirclauses = $(call notfirstword,$(patsubst %,-o -path '$(1)/%',$(2)))
+
+# Miscellaneous utility functions
+# notfirstword(wordlist): returns all but the first word in wordlist
+notfirstword = $(wordlist 2,$(words $(1)),$(1))
+
+# Needed for the foreach loops to loop over the list of hooks, so that
+# each hook call is properly separated by a newline.
+define sep
+
+
+endef
+
+PERCENT = %
+QUOTE = '
+# ' # Meh... syntax-highlighting
+
+# This macro properly escapes a command string, then prints it with printf:
+#
+# - first, backslash '\' are self-escaped, so that they do not escape
+# the following char and so that printf properly outputs a backslash;
+#
+# - next, single quotes are escaped by closing an existing one, adding
+# an escaped one, and re-openning a new one (see below for the reason);
+#
+# - then '%' signs are self-escaped so that the printf does not interpret
+# them as a format specifier, in case the variable contains an actual
+# printf with a format;
+#
+# - finally, $(sep) is replaced with the literal '\n' so that make does
+# not break on the so-expanded variable, but so that the printf does
+# correctly output an LF.
+#
+# Note: this must be escaped in this order to avoid over-escaping the
+# previously escaped elements.
+#
+# Once everything has been escaped, it is passed between single quotes
+# (that's why the single-quotes are escaped they way they are, above,
+# and why the dollar sign is not escaped) to printf(1). A trailing
+# newline is apended, too.
+#
+# Note: leading or trailing spaces are *not* stripped.
+#
+define PRINTF
+ printf '$(subst $(sep),\n,\
+ $(subst $(PERCENT),$(PERCENT)$(PERCENT),\
+ $(subst $(QUOTE),$(QUOTE)\$(QUOTE)$(QUOTE),\
+ $(subst \,\\,$(1)))))\n'
+endef