[gcc r14-9862] libquadmath: Provide __BYTE_ORDER, __LITTLE_ENDIAN and __BIG_ENDIAN definitions

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:21c9fd9688d9de9562b3cb491e4ab50ce09e663a

commit r14-9862-g21c9fd9688d9de9562b3cb491e4ab50ce09e663a
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Apr 9 09:40:45 2024 +0200

    libquadmath: Provide __BYTE_ORDER, __LITTLE_ENDIAN and __BIG_ENDIAN definitions
    
    My earlier libquadmath change apparently broke mingw32 build, while on Linux
    <bits/endian.h> is included and defines these, on Mingw apparently that isn't
    the case, while soft-fp wants a guarantee that sfp-machine.h defines these.
    
    2024-04-09  Jakub Jelinek  <jakub@redhat.com>
    
            * sfp-machine.h (__LITTLE_ENDIAN, __BIG_ENDIAN, __BYTE_ORDER): Define
            if __BYTE_ORDER isn't defined.

Diff:
---
 libquadmath/sfp-machine.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libquadmath/sfp-machine.h b/libquadmath/sfp-machine.h
index e37d5b3c656..906a09e7139 100644
--- a/libquadmath/sfp-machine.h
+++ b/libquadmath/sfp-machine.h
@@ -18,6 +18,11 @@
 #define _FP_NANSIGN_Q 1
 #define _FP_KEEPNANFRACP 1
 #define _FP_TININESS_AFTER_ROUNDING 0
+#ifndef __BYTE_ORDER
+#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
+#define __BYTE_ORDER __BYTE_ORDER__
+#endif
 #define _FP_DECL_EX \
   unsigned int fp_roundmode __attribute__ ((unused)) = FP_RND_NEAREST;
 #define FP_ROUNDMODE fp_roundmode