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List: gnulib-bug
Subject: Re: host-cpu-c-abi: fix detection of MIPS ABI
From: Bruno Haible <bruno () clisp ! org>
Date: 2017-08-19 23:28:14
Message-ID: 2135408.7KayP8nqto () omega
[Download RAW message or body]
On 2017-07-18 I wrote:
> + [# In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined, and
> + # _MIPS_SIM == _ABIN32.
> + # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined, and
> + # _MIPS_SIM == _ABIO32.
> AC_EGREP_CPP([yes],
> - [#if __mips >= 3
> + [#if defined _ABIN32
> yes
> #endif],
> [gl_cv_host_cpu_c_abi=mipsn32],
Well, it turns out it is not a good practice to test 'defined _ABIN32' or
'defined _ABIO32' because once <sgidefs.h> gets included, they are both defined!
It's better to test _MIPS_SIM.
2017-08-19 Bruno Haible <bruno@clisp.org>
host-cpu-c-abi: Improve detection of MIPS ABI.
* m4/host-cpu-c-abi.m4 (gl_HOST_CPU_C_ABI): For MIPS, test the value of
_MIPS_SIM.
diff --git a/m4/host-cpu-c-abi.m4 b/m4/host-cpu-c-abi.m4
index 01c5a66..02f7b8a 100644
--- a/m4/host-cpu-c-abi.m4
+++ b/m4/host-cpu-c-abi.m4
@@ -1,4 +1,4 @@
-# host-cpu-c-abi.m4 serial 6
+# host-cpu-c-abi.m4 serial 7
dnl Copyright (C) 2002-2017 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -157,12 +157,12 @@ changequote([,])dnl
yes
#endif],
[gl_cv_host_cpu_c_abi=mips64],
- [# In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined, and
- # _MIPS_SIM == _ABIN32.
- # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined, and
- # _MIPS_SIM == _ABIO32.
+ [# In the n32 ABI, _ABIN32 is defined, _ABIO32 is not defined (but
+ # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIN32.
+ # In the 32 ABI, _ABIO32 is defined, _ABIN32 is not defined (but
+ # may later get defined by <sgidefs.h>), and _MIPS_SIM == _ABIO32.
AC_EGREP_CPP([yes],
- [#if defined _ABIN32
+ [#if (_MIPS_SIM == _ABIN32)
yes
#endif],
[gl_cv_host_cpu_c_abi=mipsn32],
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