Re: Macintosh / Intel

Re: Macintosh / Intel

[Darren Foltinek]

I got GSL to compile by hacking the ieee-utils functionality.

1) Added ieee-utils/fp-darwin-x86.c with no support for runtime 
defining of FP precision, rounding or exceptions (just an empty 
gsl_ieee_set_mode function returning GSL_SUCCESS), suggested by 
Richard Mather. 
2) Modified ieee-utils/fp.c to include fp-darwin-x86.c, switched 
by...
3) the HAVE_DARWNX86_IEEE_INTERFACE that I added to config.h

It was beyond my hacking skills to get configure to generate the 
config.h file with the new DARWINX86 flag.

Certainly not a proper solution, but it works for now...  :-)

Tried yesterday to build a universal library - no success.  Very 
complex.  :-(

- Darren



From: Brian Gough <bjg@network-theory.co.uk>
Date: Thursday, March 2, 2006 12:23 pm
Subject: Re: Macintosh / Intel

> Darren Foltinek writes:
> > We are using the GSL library on Mac/PPC machines, and 
recently 
> > got one of the new Intel-based Macs.
> > 
> > Trying to compile GSL on the Intel Mac, it does not use the 
> correct 
> > ieee-utils/fp-* code and so the compile fails.
> > 
> > This machine has, in it's /usr/include/architecture directory 
> BOTH 
> > a "ppc" subdirectory and an "i386" subdirectory.
> > 
> > The config.guess script correctly identifies the machine as 
> "i386-
> > apple-darwin8.4.1".
> 
> Hello,
> 
> If you change the line
> 
>  #include <architecture/ppc/fp_regs.h> 
> 
> in ieee-utils/fp-darwin.c to
> 
>  #include <architecture/i386/fp_regs.h> 
> 
> does it work?
> 
> -- 
> Brian Gough
> 
> Network Theory Ltd,
> Publishing the GSL Manual --- http://www.network-
> theory.co.uk/gsl/manual/

Re: Macintosh / Intel

[Erik Schnetter]

[-- Attachment #1: Type: text/plain, Size: 275 bytes --]

My original patch was unfortunately wrong.  This one actually works.   
Sorry.

-erik

-- 
Erik Schnetter <schnetter@cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.




[-- Attachment #2: gsl.diff --]
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diff -ruN old/gsl-1.7/config.h.in new/gsl-1.7/config.h.in
--- old/gsl-1.7/config.h.in	2005-09-13 05:18:05.000000000 -0500
+++ new/gsl-1.7/config.h.in	2006-03-28 16:17:44.000000000 -0600
@@ -188,6 +188,7 @@
 #undef HAVE_NETBSD_IEEE_INTERFACE
 #undef HAVE_OPENBSD_IEEE_INTERFACE
 #undef HAVE_DARWIN_IEEE_INTERFACE
+#undef HAVE_DARWIN86_IEEE_INTERFACE
 
 /* Define this is IEEE comparisons work correctly (e.g. NaN != NaN) */
 #undef HAVE_IEEE_COMPARISONS
diff -ruN old/gsl-1.7/configure.ac new/gsl-1.7/configure.ac
--- old/gsl-1.7/configure.ac	2005-09-13 04:45:03.000000000 -0500
+++ new/gsl-1.7/configure.ac	2006-03-28 16:20:49.000000000 -0600
@@ -233,9 +233,12 @@
     *-*-irix*) 
         ac_cv_c_ieee_interface=irix
         ;;
-    *-*-*darwin*) 
+    powerpc-*-*darwin*) 
         ac_cv_c_ieee_interface=darwin
         ;;
+    *86-*-*darwin*) 
+        ac_cv_c_ieee_interface=darwin86
+        ;;
     *-*-*netbsd*) 
         ac_cv_c_ieee_interface=netbsd
         ;;
@@ -285,6 +288,7 @@
 AC_SUBST(HAVE_NETBSD_IEEE_INTERFACE)
 AC_SUBST(HAVE_OPENBSD_IEEE_INTERFACE)
 AC_SUBST(HAVE_DARWIN_IEEE_INTERFACE)
+AC_SUBST(HAVE_DARWIN86_IEEE_INTERFACE)
 
 
 
diff -ruN old/gsl-1.7/ieee-utils/Makefile.am new/gsl-1.7/ieee-utils/Makefile.am
--- old/gsl-1.7/ieee-utils/Makefile.am	2004-09-11 08:45:47.000000000 -0500
+++ new/gsl-1.7/ieee-utils/Makefile.am	2006-03-28 16:34:31.000000000 -0600
@@ -4,7 +4,7 @@
 
 libgslieeeutils_la_SOURCES =  print.c make_rep.c gsl_ieee_utils.h env.c fp.c read.c
 
-noinst_HEADERS = fp-aix.c fp-darwin.c fp-hpux.c fp-hpux11.c fp-irix.c fp-gnum68k.c fp-gnuppc.c fp-solaris.c fp-gnusparc.c fp-sunos4.c fp-tru64.c fp-unknown.c fp-gnux86.c fp-freebsd.c fp-os2emx.c fp-netbsd.c fp-openbsd.c fp-gnuc99.c endian.c standardize.c
+noinst_HEADERS = fp-aix.c fp-darwin.c fp-darwin86.c fp-hpux.c fp-hpux11.c fp-irix.c fp-gnum68k.c fp-gnuppc.c fp-solaris.c fp-gnusparc.c fp-sunos4.c fp-tru64.c fp-unknown.c fp-gnux86.c fp-freebsd.c fp-os2emx.c fp-netbsd.c fp-openbsd.c fp-gnuc99.c endian.c standardize.c
 
 INCLUDES= -I$(top_builddir)
 
diff -ruN old/gsl-1.7/ieee-utils/fp-darwin86.c new/gsl-1.7/ieee-utils/fp-darwin86.c
--- old/gsl-1.7/ieee-utils/fp-darwin86.c	1969-12-31 18:00:00.000000000 -0600
+++ new/gsl-1.7/ieee-utils/fp-darwin86.c	2006-03-28 16:36:29.000000000 -0600
@@ -0,0 +1,204 @@
+/* ieee-utils/fp-darwin86.c
+ * 
+ * Copyright (C) 2006 Erik Schnetter
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <gsl/gsl_ieee_utils.h>
+#include <gsl/gsl_errno.h>
+
+/* Here is the dirty part. Set up your 387 through the control word
+ * (cw) register.
+ *
+ *     15-13    12  11-10  9-8     7-6     5    4    3    2    1    0
+ * | reserved | IC | RC  | PC | reserved | PM | UM | OM | ZM | DM | IM
+ *
+ * IM: Invalid operation mask
+ * DM: Denormalized operand mask
+ * ZM: Zero-divide mask
+ * OM: Overflow mask
+ * UM: Underflow mask
+ * PM: Precision (inexact result) mask
+ *
+ * Mask bit is 1 means no interrupt.
+ *
+ * PC: Precision control
+ * 11 - round to extended precision
+ * 10 - round to double precision
+ * 00 - round to single precision
+ *
+ * RC: Rounding control
+ * 00 - rounding to nearest
+ * 01 - rounding down (toward - infinity)
+ * 10 - rounding up (toward + infinity)
+ * 11 - rounding toward zero
+ *
+ * IC: Infinity control
+ * That is for 8087 and 80287 only.
+ *
+ * The hardware default is 0x037f which we use.
+ */
+
+/* masking of interrupts */
+#define _FPU_MASK_IM  0x01
+#define _FPU_MASK_DM  0x02
+#define _FPU_MASK_ZM  0x04
+#define _FPU_MASK_OM  0x08
+#define _FPU_MASK_UM  0x10
+#define _FPU_MASK_PM  0x20
+
+/* precision control */
+#define _FPU_EXTENDED 0x300	/* libm requires double extended precision.  */
+#define _FPU_DOUBLE   0x200
+#define _FPU_SINGLE   0x0
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x0    /* RECOMMENDED */
+#define _FPU_RC_DOWN    0x400
+#define _FPU_RC_UP      0x800
+#define _FPU_RC_ZERO    0xC00
+
+#define _FPU_RESERVED 0xF0C0  /* Reserved bits in cw */
+
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+   and no interrupts for exceptions, rounding to nearest.  */
+
+#define _FPU_DEFAULT  0x037f
+
+/* IEEE:  same as above.  */
+#define _FPU_IEEE     0x037f
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
+
+/* Macros for accessing the hardware control word.
+
+   Note that the use of these macros is no sufficient anymore with
+   recent hardware.  Some floating point operations are executed in
+   the SSE/SSE2 engines which have their own control and status register.  */
+#define _FPU_GETCW(cw) __asm__ __volatile__ ("fnstcw %0" : "=m" (*&cw))
+#define _FPU_SETCW(cw) __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw))
+
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+
+
+
+#define _FPU_GETMXCSR(cw_sse) asm volatile ("stmxcsr %0" : "=m" (cw_sse))
+#define _FPU_SETMXCSR(cw_sse) asm volatile ("ldmxcsr %0" : : "m" (cw_sse))
+
+
+
+int
+gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
+{
+  fpu_control_t mode, mode_sse;
+
+  _FPU_GETCW (mode) ;
+  mode &= _FPU_RESERVED ;
+
+  switch (precision)
+    {
+    case GSL_IEEE_SINGLE_PRECISION:
+      mode |= _FPU_SINGLE ;
+      break ;
+    case GSL_IEEE_DOUBLE_PRECISION:
+      mode |= _FPU_DOUBLE ;
+      break ;
+    case GSL_IEEE_EXTENDED_PRECISION:
+      mode |= _FPU_EXTENDED ;
+      break ;
+    default:
+      mode |= _FPU_EXTENDED ;
+    }
+
+  switch (rounding)
+    {
+    case GSL_IEEE_ROUND_TO_NEAREST:
+      mode |= _FPU_RC_NEAREST ;
+      break ;
+    case GSL_IEEE_ROUND_DOWN:
+      mode |= _FPU_RC_DOWN ;
+      break ;
+    case GSL_IEEE_ROUND_UP:
+      mode |= _FPU_RC_UP ;
+      break ;
+    case GSL_IEEE_ROUND_TO_ZERO:
+      mode |= _FPU_RC_ZERO ;
+      break ;
+    default:
+      mode |= _FPU_RC_NEAREST ;
+    }
+
+  if (exception_mask & GSL_IEEE_MASK_INVALID)
+    mode |= _FPU_MASK_IM ;
+
+  if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
+    mode |= _FPU_MASK_DM ;
+
+  if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
+    mode |= _FPU_MASK_ZM ;
+
+  if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
+    mode |= _FPU_MASK_OM ;
+
+  if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
+    mode |= _FPU_MASK_UM ;
+
+  if (exception_mask & GSL_IEEE_TRAP_INEXACT)
+    {
+      mode &= ~ _FPU_MASK_PM ;
+    }
+  else
+    {
+      mode |= _FPU_MASK_PM ;
+    }
+
+  _FPU_SETCW (mode) ;
+
+  _FPU_GETMXCSR (mode_sse) ;
+  mode_sse &= 0xFFFF0000 ;
+
+  if (exception_mask & GSL_IEEE_MASK_INVALID)
+    mode_sse |= _FPU_MASK_IM << 7 ;
+
+  if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
+    mode_sse |= _FPU_MASK_DM << 7 ;
+
+  if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
+    mode_sse |= _FPU_MASK_ZM << 7 ;
+
+  if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
+    mode_sse |= _FPU_MASK_OM << 7 ;
+
+  if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
+    mode_sse |= _FPU_MASK_UM << 7 ;
+
+  if (exception_mask & GSL_IEEE_TRAP_INEXACT)
+    {
+      mode_sse &= ~ _FPU_MASK_PM << 7 ;
+    }
+  else
+    {
+      mode_sse |= _FPU_MASK_PM << 7 ;
+    }
+
+  _FPU_SETMXCSR (mode_sse) ;
+
+  return GSL_SUCCESS ;
+}
diff -ruN old/gsl-1.7/ieee-utils/fp.c new/gsl-1.7/ieee-utils/fp.c
--- old/gsl-1.7/ieee-utils/fp.c	2003-07-25 10:18:11.000000000 -0500
+++ new/gsl-1.7/ieee-utils/fp.c	2006-03-28 16:17:28.000000000 -0600
@@ -32,11 +32,10 @@
 #include "fp-openbsd.c"
 #elif HAVE_DARWIN_IEEE_INTERFACE
 #include "fp-darwin.c"
+#elif HAVE_DARWIN86_IEEE_INTERFACE
+#include "fp-darwin86.c"
 #elif HAVE_DECL_FEENABLEEXCEPT || HAVE_DECL_FESETTRAPENABLE
 #include "fp-gnuc99.c"
 #else
 #include "fp-unknown.c" 
 #endif
-
-
-

Re: Macintosh / Intel

[Erik Schnetter]

[-- Attachment #1.1: Type: text/plain, Size: 564 bytes --]

Darren,

thanks for your initial attempt at making gsl work on Intel Macs.  I  
think I have improved on your patch.  I include my version below.  It  
is a diff starting from gsl 1.7.  I have taken code from libgfortran,  
which is part of gcc and is distributed under the LGPL.

Brian,

the file i386/fp_regs.h to which you refer does not exist (on Darwin  
8.5.2).

-erik

-- 
Erik Schnetter <schnetter@cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
and signing email messages.  Get my PGP key from www.keyserver.net.




[-- Attachment #1.2: gsl.diff --]
[-- Type: application/octet-stream, Size: 5794 bytes --]

diff -ruN old/gsl-1.7/config.h.in new/gsl-1.7/config.h.in
--- old/gsl-1.7/config.h.in	2005-09-13 05:18:05.000000000 -0500
+++ new/gsl-1.7/config.h.in	2006-03-28 16:17:44.000000000 -0600
@@ -188,6 +188,7 @@
 #undef HAVE_NETBSD_IEEE_INTERFACE
 #undef HAVE_OPENBSD_IEEE_INTERFACE
 #undef HAVE_DARWIN_IEEE_INTERFACE
+#undef HAVE_DARWIN86_IEEE_INTERFACE
 
 /* Define this is IEEE comparisons work correctly (e.g. NaN != NaN) */
 #undef HAVE_IEEE_COMPARISONS
diff -ruN old/gsl-1.7/configure.ac new/gsl-1.7/configure.ac
--- old/gsl-1.7/configure.ac	2005-09-13 04:45:03.000000000 -0500
+++ new/gsl-1.7/configure.ac	2006-03-28 16:20:49.000000000 -0600
@@ -233,9 +233,12 @@
     *-*-irix*) 
         ac_cv_c_ieee_interface=irix
         ;;
-    *-*-*darwin*) 
+    powerpc-*-*darwin*) 
         ac_cv_c_ieee_interface=darwin
         ;;
+    *86-*-*darwin*) 
+        ac_cv_c_ieee_interface=darwin86
+        ;;
     *-*-*netbsd*) 
         ac_cv_c_ieee_interface=netbsd
         ;;
@@ -285,6 +288,7 @@
 AC_SUBST(HAVE_NETBSD_IEEE_INTERFACE)
 AC_SUBST(HAVE_OPENBSD_IEEE_INTERFACE)
 AC_SUBST(HAVE_DARWIN_IEEE_INTERFACE)
+AC_SUBST(HAVE_DARWIN86_IEEE_INTERFACE)
 
 
 
diff -ruN old/gsl-1.7/ieee-utils/Makefile.am new/gsl-1.7/ieee-utils/Makefile.am
--- old/gsl-1.7/ieee-utils/Makefile.am	2004-09-11 08:45:47.000000000 -0500
+++ new/gsl-1.7/ieee-utils/Makefile.am	2006-03-28 16:34:31.000000000 -0600
@@ -4,7 +4,7 @@
 
 libgslieeeutils_la_SOURCES =  print.c make_rep.c gsl_ieee_utils.h env.c fp.c read.c
 
-noinst_HEADERS = fp-aix.c fp-darwin.c fp-hpux.c fp-hpux11.c fp-irix.c fp-gnum68k.c fp-gnuppc.c fp-solaris.c fp-gnusparc.c fp-sunos4.c fp-tru64.c fp-unknown.c fp-gnux86.c fp-freebsd.c fp-os2emx.c fp-netbsd.c fp-openbsd.c fp-gnuc99.c endian.c standardize.c
+noinst_HEADERS = fp-aix.c fp-darwin.c fp-darwin86.c fp-hpux.c fp-hpux11.c fp-irix.c fp-gnum68k.c fp-gnuppc.c fp-solaris.c fp-gnusparc.c fp-sunos4.c fp-tru64.c fp-unknown.c fp-gnux86.c fp-freebsd.c fp-os2emx.c fp-netbsd.c fp-openbsd.c fp-gnuc99.c endian.c standardize.c
 
 INCLUDES= -I$(top_builddir)
 
diff -ruN old/gsl-1.7/ieee-utils/fp-darwin86.c new/gsl-1.7/ieee-utils/fp-darwin86.c
--- old/gsl-1.7/ieee-utils/fp-darwin86.c	1969-12-31 18:00:00.000000000 -0600
+++ new/gsl-1.7/ieee-utils/fp-darwin86.c	2006-03-28 16:36:29.000000000 -0600
@@ -0,0 +1,113 @@
+/* ieee-utils/fp-darwin86.c
+ * 
+ * Copyright (C) 2006 Erik Schnetter
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <gsl/gsl_ieee_utils.h>
+#include <gsl/gsl_errno.h>
+
+#define _FPU_MASK_IM  0x01
+#define _FPU_MASK_DM  0x02
+#define _FPU_MASK_ZM  0x04
+#define _FPU_MASK_OM  0x08
+#define _FPU_MASK_UM  0x10
+#define _FPU_MASK_PM  0x20
+
+#define _FPU_GETCW(cw) asm volatile ("fnstcw %0" : "=m" (cw))
+#define _FPU_SETCW(cw) asm volatile ("fldcw %0" : : "m" (cw))
+#define _FPU_GETMXCSR(cw_sse) asm volatile ("stmxcsr %0" : "=m" (cw_sse))
+#define _FPU_SETMXCSR(cw_sse) asm volatile ("ldmxcsr %0" : : "m" (cw_sse))
+
+
+
+int
+gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
+{
+  unsigned short mode ;
+  unsigned short cw;
+  unsigned int cw_sse;
+
+  switch (precision)
+    {
+    case GSL_IEEE_SINGLE_PRECISION:
+      mode |= _FPU_SINGLE ;
+      break ;
+    case GSL_IEEE_DOUBLE_PRECISION:
+      mode |= _FPU_DOUBLE ;
+      break ;
+    case GSL_IEEE_EXTENDED_PRECISION:
+      mode |= _FPU_EXTENDED ;
+      break ;
+    default:
+      mode |= _FPU_EXTENDED ;
+    }
+
+  switch (rounding)
+    {
+    case GSL_IEEE_ROUND_TO_NEAREST:
+      mode |= _FPU_RC_NEAREST ;
+      break ;
+    case GSL_IEEE_ROUND_DOWN:
+      mode |= _FPU_RC_DOWN ;
+      break ;
+    case GSL_IEEE_ROUND_UP:
+      mode |= _FPU_RC_UP ;
+      break ;
+    case GSL_IEEE_ROUND_TO_ZERO:
+      mode |= _FPU_RC_ZERO ;
+      break ;
+    default:
+      mode |= _FPU_RC_NEAREST ;
+    }
+
+  if (exception_mask & GSL_IEEE_MASK_INVALID)
+    mode |= _FPU_MASK_IM ;
+
+  if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
+    mode |= _FPU_MASK_DM ;
+
+  if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
+    mode |= _FPU_MASK_ZM ;
+
+  if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
+    mode |= _FPU_MASK_OM ;
+
+  if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
+    mode |= _FPU_MASK_UM ;
+
+  if (exception_mask & GSL_IEEE_TRAP_INEXACT)
+    {
+      mode &= ~ _FPU_MASK_PM ;
+    }
+  else
+    {
+      mode |= _FPU_MASK_PM ;
+    }
+
+  _FPU_GETCW (cw) ;
+  cw &= 0x0000 ;
+  cw |= mode ;
+  _FPU_SETCW (cw) ;
+
+  _FPU_GETMXCSR (cw_sse) ;
+  cw_sse &= 0xFFFF0000;
+  cw_sse |= mode << 7;
+  _FPU_SETMXCSR (cw_sse) ;
+
+  return GSL_SUCCESS ;
+}
diff -ruN old/gsl-1.7/ieee-utils/fp.c new/gsl-1.7/ieee-utils/fp.c
--- old/gsl-1.7/ieee-utils/fp.c	2003-07-25 10:18:11.000000000 -0500
+++ new/gsl-1.7/ieee-utils/fp.c	2006-03-28 16:17:28.000000000 -0600
@@ -32,11 +32,10 @@
 #include "fp-openbsd.c"
 #elif HAVE_DARWIN_IEEE_INTERFACE
 #include "fp-darwin.c"
+#elif HAVE_DARWIN86_IEEE_INTERFACE
+#include "fp-darwin86.c"
 #elif HAVE_DECL_FEENABLEEXCEPT || HAVE_DECL_FESETTRAPENABLE
 #include "fp-gnuc99.c"
 #else
 #include "fp-unknown.c" 
 #endif
-
-
-

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Re: Macintosh / Intel

[Brian Gough]

Darren Foltinek writes:
 > We are using the GSL library on Mac/PPC machines, and recently 
 > got one of the new Intel-based Macs.
 > 
 > Trying to compile GSL on the Intel Mac, it does not use the correct 
 > ieee-utils/fp-* code and so the compile fails.
 > 
 > This machine has, in it's /usr/include/architecture directory BOTH 
 > a "ppc" subdirectory and an "i386" subdirectory.
 > 
 > The config.guess script correctly identifies the machine as "i386-
 > apple-darwin8.4.1".

Hello,

If you change the line

  #include <architecture/ppc/fp_regs.h> 

in ieee-utils/fp-darwin.c to

  #include <architecture/i386/fp_regs.h> 

does it work?

-- 
Brian Gough

Network Theory Ltd,
Publishing the GSL Manual --- http://www.network-theory.co.uk/gsl/manual/

Macintosh / Intel

[Darren Foltinek]

Hi all,

We are using the GSL library on Mac/PPC machines, and recently 
got one of the new Intel-based Macs.

Trying to compile GSL on the Intel Mac, it does not use the correct 
ieee-utils/fp-* code and so the compile fails.

From my poking around in the code, the floating point architecture 
code seems to be switched by the HAVE_****_IEEE_INTERFACE 
#define in config.h.  I tried changing it from 
"HAVE_DARWIN_IEEE_INTERFACE" to 
"HAVE_GNUX86_IEEE_INTERFACE" but that did not work, resulting 
in  an error of: 

fp-gnux86.c:21:25: error: fpu_control.h: No such file or directory

This machine has, in it's /usr/include/architecture directory BOTH 
a "ppc" subdirectory and an "i386" subdirectory.

The config.guess script correctly identifies the machine as "i386-
apple-darwin8.4.1".

I'm willing to put some time in to get this going, if somebody could 
help point me in the right direction that would be much 
appreciated!

Thanks,
- Darren