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authorRoman Zippel <zippel@linux-m68k.org>2008-01-14 06:50:54 +0300
committerSam Ravnborg <sam@ravnborg.org>2008-01-29 01:14:39 +0300
commit93449082e905ce73d0346d617dd67c4b668b58af (patch)
treeeba7030f32ce18fa71562224ee2e0d8ddda33421 /scripts/kconfig/util.c
parent7a962923359768e04137125bd479fd0dfa6117d3 (diff)
downloadlinux-93449082e905ce73d0346d617dd67c4b668b58af.tar.xz
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.c23
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;