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-rw-r--r--asm/labels.c21
1 files changed, 15 insertions, 6 deletions
diff --git a/asm/labels.c b/asm/labels.c
index ead1f34b..7d87503d 100644
--- a/asm/labels.c
+++ b/asm/labels.c
@@ -505,6 +505,12 @@ void define_label(const char *label, int32_t segment,
nasm_nonfatal("label `%s' inconsistently redefined", lptr->defn.label);
noteflags = ERR_NOTE|ERR_HERE;
} else {
+ /*!
+ *!label-redef [off] label redefined to an identical value
+ *! warns if a label is defined more than once, but the
+ *! value is identical. It is an unconditional error to
+ *! define the same label more than once to \e{different} values.
+ */
nasm_warnf(WARN_LABEL_REDEF|ERR_PASS2,
"label `%s' redefined to an identical value", lptr->defn.label);
noteflags = ERR_NOTE|ERR_HERE|WARN_LABEL_REDEF|ERR_PASS2;
@@ -516,13 +522,16 @@ void define_label(const char *label, int32_t segment,
lptr->defn.label);
src_set(saved_line, saved_fname);
} else if (changed && pass0 > 1 && lptr->defn.type != LBL_SPECIAL) {
- /*
- * WARN_LABEL_REDEF_LATE defaults to an error, as this should never actually happen.
- * Just in case this is a backwards compatibility problem, still make it a
- * warning so that the user can suppress or demote it.
+ /*!
+ *!label-redef-late [err] label (re)defined during code generation
+ *! the value of a label changed during the final, code-generation
+ *! pass. This may be the result of strange use of the
+ *! preprocessor. This is very likely to produce incorrect code and
+ *! may end up being an unconditional error in a future
+ *! version of NASM.
*
- * As a special case, LBL_SPECIAL symbols are allowed to be changed
- * even during the last pass.
+ * Note: As a special case, LBL_SPECIAL symbols are allowed
+ * to be changed even during the last pass.
*/
nasm_warnf(WARN_LABEL_REDEF_LATE,
"label `%s' %s during code generation",