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Update README for libffi 3.0.9.

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libffi/ChangeLog
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@ -1,3 +1,7 @@
2009-12-31 Anthony Green <green@redhat.com>
* README: Update for libffi 3.0.9.
2009-12-27 Matthias Klose <doko@ubuntu.com>
* configure.ac (HAVE_LONG_DOUBLE): Define for mips when

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libffi/README
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@ -4,7 +4,7 @@ shipped with GCC as convenience.
Status
======
libffi-3.0.8 was released on December 19, 2008. Check the libffi web
libffi-3.0.9 was released on December 31, 2009. Check the libffi web
page for updates: <URL:http://sourceware.org/libffi/>.
@ -42,41 +42,56 @@ between the two languages.
Supported Platforms
===================
Libffi has been ported to many different platforms, although this
release was only tested on:
Libffi has been ported to many different platforms.
For specific configuration details and testing status, please
refer to the wiki page here:
http://www.moxielogic.org/wiki/index.php?title=Libffi_3.0.9
At the time of release, the following basic configurations have been
tested:
|--------------+------------------|
| Architecture | Operating System |
|--------------+------------------|
| Alpha | Linux |
| ARM | Linux |
| AVR32 | Linux |
| HPPA | HPUX |
| IA-64 | Linux |
| MIPS | IRIX |
| MIPS | Linux |
| MIPS64 | Linux |
| PowerPC | Linux |
| PowerPC | Mac OSX |
| PowerPC | FreeBSD |
| PowerPC64 | Linux |
| S390 | Linux |
| S390X | Linux |
| SPARC | Linux |
| SPARC | Solaris |
| SPARC64 | Linux |
| SPARC64 | FreeBSD |
| X86 | FreeBSD |
| X86 | kFreeBSD |
| X86 | Linux |
| X86 | Mac OSX |
| X86 | OpenBSD |
| X86 | Solaris |
| X86 | Windows/Cygwin |
| X86 | Windows/MingW |
| X86-64 | FreeBSD |
| X86-64 | Linux |
| X86-64 | OpenBSD |
|--------------+------------------|
arm oabi linux
arm eabi linux
hppa linux
mips o32 linux (little endian)
powerpc darwin
powerpc freebsd
powerpc64 linux
sparc solaris
sparc64 freebsd
sparc64 solaris
x86 cygwin
x86 darwin
x86 freebsd
x86 linux
x86 openbsd
x86 solaris
x86-64 mingw
x86-64 darwin
x86-64 linux
x86-64 OS X
x86-64 freebsd
x86-64 solaris
Please send additional platform test results to
libffi-discuss@sourceware.org.
libffi-discuss@sourceware.org and feel free to update the wiki page
above.
Installing libffi
=================
[Note: before actually performing any of these installation steps,
you may wish to read the "Platform Specific Notes" below.]
First you must configure the distribution for your particular
system. Go to the directory you wish to build libffi in and run the
"configure" program found in the root directory of the libffi source
@ -106,66 +121,20 @@ This will require that you have DejaGNU installed.
To install the library and header files, type "make install".
Platform Specific Notes
=======================
MIPS - Irix 5.3 & 6.x
---------------------
Irix 6.2 and better supports three different calling conventions: o32,
n32 and n64. Currently, libffi only supports both o32 and n32 under
Irix 6.x, but only o32 under Irix 5.3. Libffi will automatically be
configured for whichever calling convention it was built for.
By default, the configure script will try to build libffi with the GNU
development tools. To build libffi with the SGI development tools, set
the environment variable CC to either "cc -32" or "cc -n32" before
running configure under Irix 6.x (depending on whether you want an o32
or n32 library), or just "cc" for Irix 5.3.
With the n32 calling convention, when returning structures smaller
than 16 bytes, be sure to provide an RVALUE that is 8 byte aligned.
Here's one way of forcing this:
double struct_storage[2];
my_small_struct *s = (my_small_struct *) struct_storage;
/* Use s for RVALUE */
If you don't do this you are liable to get spurious bus errors.
"long long" values are not supported yet.
You must use GNU Make to build libffi on SGI platforms.
PowerPC System V ABI
--------------------
There are two `System V ABI's which libffi implements for PowerPC.
They differ only in how small structures are returned from functions.
In the FFI_SYSV version, structures that are 8 bytes or smaller are
returned in registers. This is what GCC does when it is configured
for solaris, and is what the System V ABI I have (dated September
1995) says.
In the FFI_GCC_SYSV version, all structures are returned the same way:
by passing a pointer as the first argument to the function. This is
what GCC does when it is configured for linux or a generic sysv
target.
EGCS 1.0.1 (and probably other versions of EGCS/GCC) also has a
inconsistency with the SysV ABI: When a procedure is called with many
floating-point arguments, some of them get put on the stack. They are
all supposed to be stored in double-precision format, even if they are
only single-precision, but EGCS stores single-precision arguments as
single-precision anyway. This causes one test to fail (the `many
arguments' test).
History
=======
See the ChangeLog files for details.
3.0.9 Dec-31-09
Add AVR32 and win64 ports. Add ARM softfp support.
Many fixes for AIX, Solaris, HP-UX, *BSD.
Several PowerPC and x86-64 bug fixes.
Build DLL for windows.
3.0.8 Dec-19-08
Add *BSD, BeOS, and PA-Linux support.
3.0.7 Nov-11-08
Fix for ppc FreeBSD.
(thanks to Andreas Tobler)