linux-kernel - [PATCH 1/2] kbuild: add stringify helper to quote a string passed to C files

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Date:   Thu, 12 Oct 2017 18:56:03 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Joe Perches <joe@...ches.com>, Tom Rini <trini@...sulko.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        Cao jin <caoj.fnst@...fujitsu.com>,
        Arnd Bergmann <arnd@...db.de>, James Hogan <jhogan@...nel.org>,
        linux-kernel@...r.kernel.org,
        Jan-Simon Möller <dl9pf@....de>,
        Michal Marek <michal.lkml@...kovi.net>,
        Douglas Anderson <dianders@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Charlebois <charlebm@...il.com>
Subject: [PATCH 1/2] kbuild: add stringify helper to quote a string passed to C files

I want to reuse $(squote)$(quote)...$(quote)$(squote) in the next
commit.  Move it to a helper.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/Kbuild.include | 4 ++++
 scripts/Makefile.lib   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index db81df3..0b97354 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -33,6 +33,10 @@ baseprereq = $(basename $(notdir $<))
 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
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 580e605..9bbb019 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -89,7 +89,7 @@ obj-dirs	:= $(addprefix $(obj)/,$(obj-dirs))
 # Note: Files that end up in two or more modules are compiled without the
 #       KBUILD_MODNAME definition. The reason is that any made-up name would
 #       differ in different configs.
-name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
+name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
 modname_flags  = $(if $(filter 1,$(words $(modname))),\
                  -DKBUILD_MODNAME=$(call name-fix,$(modname)))
-- 
2.7.4