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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2018-02-28 20:17:36 +0100 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-03-05 23:48:25 +0900 |
| commit | 5b8ad96d1a4421ffe417e647a65064aad1e84fb4 (patch) | |
| tree | 23aff2c1cc0a91d53ca8f15ee7b1dffba3217b9a /scripts/basic | |
| parent | 14a596a7e6fd9c5baa6b2cfc57962e2c3bda6c69 (diff) | |
| download | lwn-5b8ad96d1a4421ffe417e647a65064aad1e84fb4.tar.gz lwn-5b8ad96d1a4421ffe417e647a65064aad1e84fb4.zip | |
fixdep: remove some false CONFIG_ matches
The string CONFIG_ quite often appears after other alphanumerics,
meaning that that instance cannot be referencing a Kconfig
symbol. Omitting these means make has fewer files to stat() when
deciding what needs to be rebuilt - for a defconfig build, this seems to
remove about 2% of the (wildcard ...) lines from the .o.cmd files.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/basic')
| -rw-r--r-- | scripts/basic/fixdep.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c index d7fbe545dd5d..1b21870d6e7f 100644 --- a/scripts/basic/fixdep.c +++ b/scripts/basic/fixdep.c @@ -225,8 +225,13 @@ static int str_ends_with(const char *s, int slen, const char *sub) static void parse_config_file(const char *p) { const char *q, *r; + const char *start = p; while ((p = strstr(p, "CONFIG_"))) { + if (p > start && (isalnum(p[-1]) || p[-1] == '_')) { + p += 7; + continue; + } p += 7; q = p; while (*q && (isalnum(*q) || *q == '_')) |