From: Ulrich Mueller <ulm@gentoo.org>
To: Dan Nicolaescu <dann@ics.uci.edu>
Cc: sh@gentoo.org, emacs@gentoo.org,
Stefan Monnier <monnier@iro.umontreal.ca>,
emacs-devel@gnu.org
Subject: Re: SuperH port
Date: Fri, 17 Oct 2008 22:26:43 +0200 [thread overview]
Message-ID: <18680.62723.402555.845019@a1ihome1.kph.uni-mainz.de> (raw)
In-Reply-To: <200810170604.m9H6405l013839@mothra.ics.uci.edu>
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>>>>> On Thu, 16 Oct 2008, Dan Nicolaescu wrote:
> On all the machines that I am aware off that support both big and
> little endian the compiler predefines a symbol to distinguish
> between them.
It turns out that gcc defines __LITTLE_ENDIAN__ and __BIG_ENDIAN__,
respectively:
$ echo | sh4-gentoo-linux-uclibc-gcc -nostdinc -dM -E - | grep ENDIAN
__LITTLE_ENDIAN__
(To add some confusion, endian.h then also defines _all_ four of
__LITTLE_ENDIAN, LITTLE_ENDIAN, __BIG_ENDIAN, and BIG_ENDIAN,
regardless of the machine's byte sex. Go figure.)
> I'll install this when the endianess issue gets resolved.
I still think that my previous approach (include sys/param.h and
test for __BYTE_ORDER) was cleaner. But if you absolutely want a
compiler-defined symbol, an updated patch is included below.
Ulrich
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emacs/ChangeLog entry:
2008-10-16 Ulrich Mueller <ulm@gentoo.org>
* configure.in: Add support for GNU/Linux on SuperH.
emacs/etc/ChangeLog entry:
2008-10-16 Ulrich Mueller <ulm@gentoo.org>
* MACHINES: Add section for SuperH.
emacs/src/ChangeLog entry:
2008-10-16 Ulrich Mueller <ulm@gentoo.org>
* m/sh3.h: New file, machine description for SuperH.
--- emacs-orig/configure.in 2008-08-28 22:31:27.000000000 +0200
+++ emacs/configure.in 2008-10-16 17:27:37.000000000 +0200
@@ -540,6 +540,11 @@
machine=xtensa opsys=gnu-linux
;;
+ ## SuperH Linux-based GNU system
+ sh[34]*-*-linux-gnu* )
+ machine=sh3 opsys=gnu-linux
+ ;;
+
* )
unported=yes
;;
--- emacs-orig/etc/MACHINES 2008-08-01 23:44:40.000000000 +0200
+++ emacs/etc/MACHINES 2008-10-16 17:27:37.000000000 +0200
@@ -426,6 +426,12 @@
(now remapped as part of the text). These are never
swapped in.
+SuperH (sh[34]*-*-linux-gnu)
+
+ Emacs 23.0.60 was reported to work on GNU/Linux (October 2008).
+ Tested on a little-endian sh4 system (cpu type SH7751R) running
+ Gentoo Linux 2008.0.
+
Tadpole 68K (m68k-tadpole-sysv)
Changes merged in 19.1.
--- emacs-orig/src/m/sh3.h 1970-01-01 01:00:00.000000000 +0100
+++ emacs/src/m/sh3.h 2008-10-16 17:27:37.000000000 +0200
@@ -0,0 +1,20 @@
+/* Machine description file for SuperH. */
+
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
+ is the most significant byte. */
+
+#if defined (__LITTLE_ENDIAN__) && !defined (__BIG_ENDIAN__)
+# undef WORDS_BIG_ENDIAN
+#elif defined (__BIG_ENDIAN__) && !defined (__LITTLE_ENDIAN__)
+# define WORDS_BIG_ENDIAN
+#else
+# error "cannot determine byte sex"
+#endif
+
+/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
+ group of arguments and treat it as an array of the arguments. */
+
+#define NO_ARG_ARRAY
+
+/* arch-tag: c997297c-9b92-11dd-b25e-0012f098dd76
+ (do not change this comment) */
next prev parent reply other threads:[~2008-10-17 20:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-08 9:17 SuperH port Ulrich Mueller
2008-10-08 10:37 ` Ulrich Mueller
2008-10-08 14:31 ` Dan Nicolaescu
2008-10-08 18:22 ` Ulrich Mueller
2008-10-08 18:47 ` Stefan Monnier
2008-10-15 21:16 ` Ulrich Mueller
2008-10-15 21:36 ` Dan Nicolaescu
2008-10-16 16:04 ` Ulrich Mueller
2008-10-17 6:04 ` Dan Nicolaescu
2008-10-17 20:26 ` Ulrich Mueller [this message]
2008-10-17 22:25 ` Andreas Schwab
2008-10-17 22:56 ` Ulrich Mueller
2008-10-18 8:39 ` Ulrich Mueller
2008-10-18 8:12 ` Dan Nicolaescu
2008-12-11 7:20 ` Ulrich Mueller
2008-12-11 7:58 ` Dan Nicolaescu
2008-10-09 10:24 ` Ulrich Mueller
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