commit 03cfe155f46c05e4dda349be2abe467c16789491
Author: Francois-Xavier Coudert <fxcoudert@gmail.com>
Date:   2022-01-25 21:54:03 +0100

    Fortran: fix issignaling() implementation
    
    libgfortran/ChangeLog:
    
            * ieee/issignaling_fallback.h: Fix GCC-specific preprocessor
            macros.

diff --git a/libgfortran/ieee/issignaling_fallback.h b/libgfortran/ieee/issignaling_fallback.h
index 4632bc510f7..fc59481c43b 100644
--- a/libgfortran/ieee/issignaling_fallback.h
+++ b/libgfortran/ieee/issignaling_fallback.h
@@ -103,12 +103,12 @@ typedef union
   long double value;
   struct
   {
-#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
     int sign_exponent:16;
     unsigned int empty:16;
     uint32_t msw;
     uint32_t lsw;
-#elif __FLOAT_WORD_ORDER == __LITTLE_ENDIAN
+#elif __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
     uint32_t lsw;
     uint32_t msw;
     int sign_exponent:16;
@@ -146,10 +146,10 @@ typedef union
   long double value;
   struct
   {
-#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
     uint64_t msw;
     uint64_t lsw;
-#elif __FLOAT_WORD_ORDER == __LITTLE_ENDIAN
+#elif __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
     uint64_t lsw;
     uint64_t msw;
 #endif
@@ -191,10 +191,10 @@ typedef union
   __float128 value;
   struct
   {
-#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
     uint64_t msw;
     uint64_t lsw;
-#elif __FLOAT_WORD_ORDER == __LITTLE_ENDIAN
+#elif __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
     uint64_t lsw;
     uint64_t msw;
 #endif