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| author | Roman Zippel <zippel@linux-m68k.org> | 2008-01-14 04:50:54 +0100 |
|---|---|---|
| committer | Sam Ravnborg <sam@ravnborg.org> | 2008-01-28 23:14:39 +0100 |
| commit | 93449082e905ce73d0346d617dd67c4b668b58af (patch) | |
| tree | eba7030f32ce18fa71562224ee2e0d8ddda33421 /scripts/kconfig/util.c | |
| parent | 7a962923359768e04137125bd479fd0dfa6117d3 (diff) | |
| download | linux-stable-93449082e905ce73d0346d617dd67c4b668b58af.tar.gz linux-stable-93449082e905ce73d0346d617dd67c4b668b58af.tar.bz2 linux-stable-93449082e905ce73d0346d617dd67c4b668b58af.zip | |
kconfig: environment symbol support
Add the possibility to import a value from the environment into kconfig
via the option syntax. Beside flexibility this has the advantage
providing proper dependencies.
Documented the options syntax.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/kconfig/util.c')
| -rw-r--r-- | scripts/kconfig/util.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c index e1cad924c0a4..f8e73c039dc8 100644 --- a/scripts/kconfig/util.c +++ b/scripts/kconfig/util.c @@ -29,6 +29,8 @@ struct file *file_lookup(const char *name) /* write a dependency file as used by kbuild to track dependencies */ int file_write_dep(const char *name) { + struct symbol *sym, *env_sym; + struct expr *e; struct file *file; FILE *out; @@ -45,8 +47,25 @@ int file_write_dep(const char *name) fprintf(out, "\t%s\n", file->name); } fprintf(out, "\ninclude/config/auto.conf: \\\n" - "\t$(deps_config)\n\n" - "$(deps_config): ;\n"); + "\t$(deps_config)\n\n"); + + expr_list_for_each_sym(sym_env_list, e, sym) { + struct property *prop; + const char *value; + + prop = sym_get_env_prop(sym); + env_sym = prop_get_symbol(prop); + if (!env_sym) + continue; + value = getenv(env_sym->name); + if (!value) + value = ""; + fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value); + fprintf(out, "include/config/auto.conf: FORCE\n"); + fprintf(out, "endif\n"); + } + + fprintf(out, "\n$(deps_config): ;\n"); fclose(out); rename("..config.tmp", name); return 0; |