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diff --git a/.svn/text-base/README.svn-base b/.svn/text-base/README.svn-base deleted file mode 100644 index f102612..0000000 --- a/.svn/text-base/README.svn-base +++ /dev/null @@ -1,340 +0,0 @@ -This directory contains the libffi package, which is not part of GCC but -shipped with GCC as convenience. - -Status -====== - -libffi-3.0.8 was released on December 19, 2008. Check the libffi web -page for updates: <URL:http://sourceware.org/libffi/>. - - -What is libffi? -=============== - -Compilers for high level languages generate code that follow certain -conventions. These conventions are necessary, in part, for separate -compilation to work. One such convention is the "calling -convention". The "calling convention" is essentially a set of -assumptions made by the compiler about where function arguments will -be found on entry to a function. A "calling convention" also specifies -where the return value for a function is found. - -Some programs may not know at the time of compilation what arguments -are to be passed to a function. For instance, an interpreter may be -told at run-time about the number and types of arguments used to call -a given function. Libffi can be used in such programs to provide a -bridge from the interpreter program to compiled code. - -The libffi library provides a portable, high level programming -interface to various calling conventions. This allows a programmer to -call any function specified by a call interface description at run -time. - -FFI stands for Foreign Function Interface. A foreign function -interface is the popular name for the interface that allows code -written in one language to call code written in another language. The -libffi library really only provides the lowest, machine dependent -layer of a fully featured foreign function interface. A layer must -exist above libffi that handles type conversions for values passed -between the two languages. - - -Supported Platforms -=================== - -Libffi has been ported to many different platforms, although this -release was only tested on: - - 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. - -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 -distribution. - -You may want to tell configure where to install the libffi library and -header files. To do that, use the --prefix configure switch. Libffi -will install under /usr/local by default. - -If you want to enable extra run-time debugging checks use the the ---enable-debug configure switch. This is useful when your program dies -mysteriously while using libffi. - -Another useful configure switch is --enable-purify-safety. Using this -will add some extra code which will suppress certain warnings when you -are using Purify with libffi. Only use this switch when using -Purify, as it will slow down the library. - -Configure has many other options. Use "configure --help" to see them all. - -Once configure has finished, type "make". Note that you must be using -GNU make. You can ftp GNU make from prep.ai.mit.edu:/pub/gnu. - -To ensure that libffi is working as advertised, type "make check". -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 -======= - -3.0.7 Nov-11-08 - Fix for ppc FreeBSD. - (thanks to Andreas Tobler) - -3.0.6 Jul-17-08 - Fix for closures on sh. - Mark the sh/sh64 stack as non-executable. - (both thanks to Kaz Kojima) - -3.0.5 Apr-3-08 - Fix libffi.pc file. - Fix #define ARM for IcedTea users. - Fix x86 closure bug. - -3.0.4 Feb-24-08 - Fix x86 OpenBSD configury. - -3.0.3 Feb-22-08 - Enable x86 OpenBSD thanks to Thomas Heller, and - x86-64 FreeBSD thanks to Björn König and Andreas Tobler. - Clean up test instruction in README. - -3.0.2 Feb-21-08 - Improved x86 FreeBSD support. - Thanks to Björn König. - -3.0.1 Feb-15-08 - Fix instruction cache flushing bug on MIPS. - Thanks to David Daney. - -3.0.0 Feb-15-08 - Many changes, mostly thanks to the GCC project. - Cygnus Solutions is now Red Hat. - - [10 years go by...] - -1.20 Oct-5-98 - Raffaele Sena produces ARM port. - -1.19 Oct-5-98 - Fixed x86 long double and long long return support. - m68k bug fixes from Andreas Schwab. - Patch for DU assembler compatibility for the Alpha from Richard - Henderson. - -1.18 Apr-17-98 - Bug fixes and MIPS configuration changes. - -1.17 Feb-24-98 - Bug fixes and m68k port from Andreas Schwab. PowerPC port from - Geoffrey Keating. Various bug x86, Sparc and MIPS bug fixes. - -1.16 Feb-11-98 - Richard Henderson produces Alpha port. - -1.15 Dec-4-97 - Fixed an n32 ABI bug. New libtool, auto* support. - -1.14 May-13-97 - libtool is now used to generate shared and static libraries. - Fixed a minor portability problem reported by Russ McManus - <mcmanr@eq.gs.com>. - -1.13 Dec-2-96 - Added --enable-purify-safety to keep Purify from complaining - about certain low level code. - Sparc fix for calling functions with < 6 args. - Linux x86 a.out fix. - -1.12 Nov-22-96 - Added missing ffi_type_void, needed for supporting void return - types. Fixed test case for non MIPS machines. Cygnus Support - is now Cygnus Solutions. - -1.11 Oct-30-96 - Added notes about GNU make. - -1.10 Oct-29-96 - Added configuration fix for non GNU compilers. - -1.09 Oct-29-96 - Added --enable-debug configure switch. Clean-ups based on LCLint - feedback. ffi_mips.h is always installed. Many configuration - fixes. Fixed ffitest.c for sparc builds. - -1.08 Oct-15-96 - Fixed n32 problem. Many clean-ups. - -1.07 Oct-14-96 - Gordon Irlam rewrites v8.S again. Bug fixes. - -1.06 Oct-14-96 - Gordon Irlam improved the sparc port. - -1.05 Oct-14-96 - Interface changes based on feedback. - -1.04 Oct-11-96 - Sparc port complete (modulo struct passing bug). - -1.03 Oct-10-96 - Passing struct args, and returning struct values works for - all architectures/calling conventions. Expanded tests. - -1.02 Oct-9-96 - Added SGI n32 support. Fixed bugs in both o32 and Linux support. - Added "make test". - -1.01 Oct-8-96 - Fixed float passing bug in mips version. Restructured some - of the code. Builds cleanly with SGI tools. - -1.00 Oct-7-96 - First release. No public announcement. - - -Authors & Credits -================= - -libffi was originally written by Anthony Green <green@redhat.com>. - -The developers of the GNU Compiler Collection project have made -innumerable valuable contributions. See the ChangeLog file for -details. - -Some of the ideas behind libffi were inspired by Gianni Mariani's free -gencall library for Silicon Graphics machines. - -The closure mechanism was designed and implemented by Kresten Krab -Thorup. - -Major processor architecture ports were contributed by the following -developers: - -alpha Richard Henderson -arm Raffaele Sena -cris Simon Posnjak, Hans-Peter Nilsson -frv Anthony Green -ia64 Hans Boehm -m32r Kazuhiro Inaoka -m68k Andreas Schwab -mips Anthony Green, Casey Marshall -mips64 David Daney -pa Randolph Chung, Dave Anglin, Andreas Tobler -powerpc Geoffrey Keating, Andreas Tobler, - David Edelsohn, John Hornkvist -powerpc64 Jakub Jelinek -s390 Gerhard Tonn, Ulrich Weigand -sh Kaz Kojima -sh64 Kaz Kojima -sparc Anthony Green, Gordon Irlam -x86 Anthony Green, Jon Beniston -x86-64 Bo Thorsen - -Jesper Skov and Andrew Haley both did more than their fair share of -stepping through the code and tracking down bugs. - -Thanks also to Tom Tromey for bug fixes, documentation and -configuration help. - -Thanks to Jim Blandy, who provided some useful feedback on the libffi -interface. - -Andreas Tobler has done a tremendous amount of work on the testsuite. - -Alex Oliva solved the executable page problem for SElinux. - -The list above is almost certainly incomplete and inaccurate. I'm -happy to make corrections or additions upon request. - -If you have a problem, or have found a bug, please send a note to -green@redhat.com. |