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Formerly expand.c.~9~

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This commit is contained in:
Roland McGrath 1993-06-25 19:20:36 +00:00
parent 4ac6d66244
commit ae112a5cb5
1 changed files with 27 additions and 1 deletions
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28
expand.c
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@ -104,7 +104,28 @@ recursively_expand (v)
return value;
}
/* Expand a simple reference to variable NAME, which LENGTH chars long. */
/* Warn that NAME is an undefined variable. */
#ifdef __GNUC__
__inline
#endif
static void
warn_undefined (name, length)
char *name;
unsigned int length;
{
if (warn_undefined_variables_flag)
{
static const char warnmsg[] = "warning: undefined variable `%.*s'";
if (reading_filename != 0)
makefile_error (reading_filename, *reading_lineno_ptr,
warnmsg, length, name);
else
error (warnmsg, length, name);
}
}
/* Expand a simple reference to variable NAME, which is LENGTH chars long. */
#ifdef __GNUC__
__inline
@ -117,6 +138,9 @@ reference_variable (o, name, length)
{
register struct variable *v = lookup_variable (name, length);
if (v == 0)
warn_undefined (name, length);
if (v != 0 && *v->value != '\0')
{
char *value = (v->recursive ? recursively_expand (v) : v->value);
@ -254,6 +278,8 @@ variable_expand (line)
char *subst_beg, *subst_end, *replace_beg, *replace_end;
v = lookup_variable (beg, colon - beg);
if (v == 0)
warn_undefined (beg, colon - beg);
subst_beg = colon + 1;
count = 0;