[Bug fortran/104220] [12 Regression] Build fail: libgfortran/ieee/issignaling_fallback.h:140:21: error: token "=" is not valid in preprocessor expressions

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104220

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Testing now:

--- a/libgfortran/ieee/issignaling_fallback.h
+++ b/libgfortran/ieee/issignaling_fallback.h
@@ -140 +140 @@ __issignalingl (long double x)
-#elif (__LDBL_DIG__ = 33) && __LDBL_IS_IEC_60559__
+#elif (__LDBL_DIG__ == 33) && __LDBL_IS_IEC_60559__