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Rodriguez" , linux-kernel@vger.kernel.org, Nicholas Piggin , Kees Cook , Emese Revfy , x86@kernel.org, Masahiro Yamada Subject: [PATCH v4 14/31] kconfig: expand lefthand side of assignment statement Date: Thu, 17 May 2018 15:16:53 +0900 Message-Id: <1526537830-22606-15-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526537830-22606-1-git-send-email-yamada.masahiro@socionext.com> References: <1526537830-22606-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make expands the lefthand side of assignment statements. In fact, Kbuild relies on it since kernel makefiles mostly look like follows: obj-$(CONFIG_FOO) += foo.o Do likewise in Kconfig. Signed-off-by: Masahiro Yamada --- Changes in v4: None Changes in v3: None Changes in v2: None scripts/kconfig/zconf.l | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.7.4 diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l index c68ca56b..ae33e9b 100644 --- a/scripts/kconfig/zconf.l +++ b/scripts/kconfig/zconf.l @@ -114,6 +114,13 @@ n [A-Za-z0-9_-] yylval.string = text; return T_VARIABLE; } + ({n}|$)+ { + /* this token includes at least one '$' */ + yylval.string = expand_token(yytext, yyleng); + if (strlen(yylval.string)) + return T_VARIABLE; + free(yylval.string); + } "=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; } ":=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; } "+=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_APPEND; return T_ASSIGN; }