kc3-lang/libffi

diff --git a/.pc/msvc/README b/.pc/msvc/README
new file mode 100644
index 0000000..8a03bf9
--- /dev/null
+++ b/.pc/msvc/README
@@ -0,0 +1,312 @@
+Status
+======
+
+libffi-3.0.10 was released on XXXXXXXXXX, 2010. 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.
+For specific configuration details and testing status, please
+refer to the wiki page here:
+
+ http://www.moxielogic.org/wiki/index.php?title=Libffi_3.0.10
+
+At the time of release, the following basic configurations have been
+tested:
+
+|--------------+------------------|
+| Architecture | Operating System |
+|--------------+------------------|
+| Alpha        | Linux            |
+| Alpha        | Tru64            |
+| 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          |
+| X86-64       | Windows/MingW    |
+|--------------+------------------|
+
+Please send additional platform test results to
+libffi-discuss@sourceware.org and feel free to update the wiki page
+above.
+
+Installing libffi
+=================
+
+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".
+
+
+History
+=======
+
+See the ChangeLog files for details.
+
+3.0.10 ???-??-??
+        Fix the N64 build on mips-sgi-irix6.5.
+	Testsuite fixes for Tru64 Unix.
+
+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)
+
+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.
diff --git a/.pc/msvc/msvcc.sh b/.pc/msvc/msvcc.sh
new file mode 100644
index 0000000..8301839
--- /dev/null
+++ b/.pc/msvc/msvcc.sh
@@ -0,0 +1,185 @@
+#!/bin/sh
+
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is the MSVC wrappificator.
+#
+# The Initial Developer of the Original Code is
+# Timothy Wall <twalljava@dev.java.net>.
+# Portions created by the Initial Developer are Copyright (C) 2009
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Daniel Witte <dwitte@mozilla.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+#
+# GCC-compatible wrapper for cl.exe and ml.exe. Arguments are given in GCC
+# format and translated into something sensible for cl or ml.
+#
+
+# Disable specific warnings, and enable warnings-as-errors so we catch any
+# mistranslated args.
+nowarn="-wd4127 -wd4820 -wd4706 -wd4100 -wd4255 -wd4668 -wd4053 -wd4324"
+args="-nologo -W3 -WX $nowarn"
+md=-MD
+cl="cl"
+ml="ml"
+output=
+
+while [ $# -gt 0 ]
+do
+  case $1
+  in
+    -fexceptions)
+      # Don't enable exceptions for now.
+      #args="$args -EHac"
+      shift 1
+    ;;
+    -m32)
+      shift 1
+    ;;
+    -m64)
+      cl="cl"   # "$MSVC/x86_amd64/cl"
+      ml="ml64" # "$MSVC/x86_amd64/ml64"
+      shift 1
+    ;;
+    -O*)
+      args="$args $1"
+      shift 1
+    ;;
+    -g)
+      # Can't specify -RTC1 or -Zi in opt. -Gy is ok. Use -OPT:REF?
+      args="$args -D_DEBUG -RTC1 -Zi"
+      md=-MDd
+      shift 1
+    ;;
+    -c)
+      args="$args -c"
+      args="$(echo $args | sed 's%/Fe%/Fo%g')"
+      single="-c"
+      shift 1
+    ;;
+    -D*=*)
+      name="$(echo $1|sed 's/-D\([^=][^=]*\)=.*/\1/g')"
+      value="$(echo $1|sed 's/-D[^=][^=]*=//g')"
+      args="$args -D${name}='$value'"
+      defines="$defines -D${name}='$value'"
+      shift 1
+    ;;
+    -D*)
+      args="$args $1"
+      defines="$defines $1"
+      shift 1
+    ;;
+    -I)
+      args="$args -I$2"
+      includes="$includes -I$2"
+      shift 2
+    ;;
+    -I*)
+      args="$args $1"
+      includes="$includes $1"
+      shift 1
+    ;;
+    -W|-Wextra)
+      # TODO map extra warnings
+      shift 1
+    ;;
+    -Wall)
+      args="$args -Wall"
+      shift 1
+    ;;
+    -Werror)
+      args="$args -WX"
+      shift 1
+    ;;
+    -W*)
+      # TODO map specific warnings
+      shift 1
+    ;;
+    -S)
+      args="$args -FAs"
+      shift 1
+    ;;
+    -o)
+      outdir="$(dirname $2)"
+      base="$(basename $2|sed 's/\.[^.]*//g')"
+      if [ -n "$single" ]; then 
+        output="-Fo$2"
+      else
+        output="-Fe$2"
+      fi
+      if [ -n "$assembly" ]; then
+        args="$args $output"
+      else
+        args="$args $output -Fd$outdir/$base -Fp$outdir/$base -Fa$outdir/$base"
+      fi
+      shift 2
+    ;;
+    *.S)
+      src=$1
+      assembly="true"
+      shift 1
+    ;;
+    *.c)
+      args="$args $1"
+      shift 1
+    ;;
+    *)
+      # Assume it's an MSVC argument, and pass it through.
+      args="$args $1"
+      shift 1
+    ;;
+  esac
+done
+
+if [ -n "$assembly" ]; then
+    if [ -z "$outdir" ]; then
+      outdir="."
+    fi
+    ppsrc="$outdir/$(basename $src|sed 's/.S$/.asm/g')"
+    echo "$cl -nologo -EP $includes $defines $src > $ppsrc"
+    "$cl" -nologo -EP $includes $defines $src > $ppsrc || exit $?
+    output="$(echo $output | sed 's%/F[dpa][^ ]*%%g')"
+    args="-nologo -safeseh $single $output $ppsrc"
+
+    echo "$ml $args"
+    eval "\"$ml\" $args"
+    result=$?
+
+    # required to fix ml64 broken output?
+    #mv *.obj $outdir
+else
+    args="$md $args"
+    echo "$cl $args"
+    eval "\"$cl\" $args"
+    result=$?
+fi
+
+exit $result
+
diff --git a/ChangeLog.libffi b/ChangeLog.libffi
index b3c333c..5272f33 100644
--- a/ChangeLog.libffi
+++ b/ChangeLog.libffi
@@ -1,5 +1,11 @@
+2010-01-15  Anthony Green  <green@redhat.com>
+
+	* README: Add notes on building with Microsoft Visual C++.
+
 2010-01-15  Daniel Witte  <dwitte@mozilla.com>
 
+	* msvcc.sh: New file.
+
 	* src/x86/win32.S: Port assembly routines to MSVC and #ifdef.
 	* src/x86/ffi.c: Tweak function declaration and remove excess
 	parens.
diff --git a/README b/README
index 8a03bf9..7be8356 100644
--- a/README
+++ b/README
@@ -109,6 +109,14 @@ 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.
 
+It's also possible to build libffi on Windows platforms with
+Microsoft's Visual C++ compiler.  In this case, use the msvcc.sh
+wrapper script during configuration like so:
+
+path/to/configure --enable-shared --enable-static \
+	CC=path/to/msvcc.sh LD=link \
+	CPP=\"cl -nologo -EP\"
+
 Configure has many other options. Use "configure --help" to see them all.
 
 Once configure has finished, type "make". Note that you must be using
diff --git a/msvcc.sh b/msvcc.sh
new file mode 100755
index 0000000..8301839
--- /dev/null
+++ b/msvcc.sh
@@ -0,0 +1,185 @@
+#!/bin/sh
+
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is the MSVC wrappificator.
+#
+# The Initial Developer of the Original Code is
+# Timothy Wall <twalljava@dev.java.net>.
+# Portions created by the Initial Developer are Copyright (C) 2009
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Daniel Witte <dwitte@mozilla.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+#
+# GCC-compatible wrapper for cl.exe and ml.exe. Arguments are given in GCC
+# format and translated into something sensible for cl or ml.
+#
+
+# Disable specific warnings, and enable warnings-as-errors so we catch any
+# mistranslated args.
+nowarn="-wd4127 -wd4820 -wd4706 -wd4100 -wd4255 -wd4668 -wd4053 -wd4324"
+args="-nologo -W3 -WX $nowarn"
+md=-MD
+cl="cl"
+ml="ml"
+output=
+
+while [ $# -gt 0 ]
+do
+  case $1
+  in
+    -fexceptions)
+      # Don't enable exceptions for now.
+      #args="$args -EHac"
+      shift 1
+    ;;
+    -m32)
+      shift 1
+    ;;
+    -m64)
+      cl="cl"   # "$MSVC/x86_amd64/cl"
+      ml="ml64" # "$MSVC/x86_amd64/ml64"
+      shift 1
+    ;;
+    -O*)
+      args="$args $1"
+      shift 1
+    ;;
+    -g)
+      # Can't specify -RTC1 or -Zi in opt. -Gy is ok. Use -OPT:REF?
+      args="$args -D_DEBUG -RTC1 -Zi"
+      md=-MDd
+      shift 1
+    ;;
+    -c)
+      args="$args -c"
+      args="$(echo $args | sed 's%/Fe%/Fo%g')"
+      single="-c"
+      shift 1
+    ;;
+    -D*=*)
+      name="$(echo $1|sed 's/-D\([^=][^=]*\)=.*/\1/g')"
+      value="$(echo $1|sed 's/-D[^=][^=]*=//g')"
+      args="$args -D${name}='$value'"
+      defines="$defines -D${name}='$value'"
+      shift 1
+    ;;
+    -D*)
+      args="$args $1"
+      defines="$defines $1"
+      shift 1
+    ;;
+    -I)
+      args="$args -I$2"
+      includes="$includes -I$2"
+      shift 2
+    ;;
+    -I*)
+      args="$args $1"
+      includes="$includes $1"
+      shift 1
+    ;;
+    -W|-Wextra)
+      # TODO map extra warnings
+      shift 1
+    ;;
+    -Wall)
+      args="$args -Wall"
+      shift 1
+    ;;
+    -Werror)
+      args="$args -WX"
+      shift 1
+    ;;
+    -W*)
+      # TODO map specific warnings
+      shift 1
+    ;;
+    -S)
+      args="$args -FAs"
+      shift 1
+    ;;
+    -o)
+      outdir="$(dirname $2)"
+      base="$(basename $2|sed 's/\.[^.]*//g')"
+      if [ -n "$single" ]; then 
+        output="-Fo$2"
+      else
+        output="-Fe$2"
+      fi
+      if [ -n "$assembly" ]; then
+        args="$args $output"
+      else
+        args="$args $output -Fd$outdir/$base -Fp$outdir/$base -Fa$outdir/$base"
+      fi
+      shift 2
+    ;;
+    *.S)
+      src=$1
+      assembly="true"
+      shift 1
+    ;;
+    *.c)
+      args="$args $1"
+      shift 1
+    ;;
+    *)
+      # Assume it's an MSVC argument, and pass it through.
+      args="$args $1"
+      shift 1
+    ;;
+  esac
+done
+
+if [ -n "$assembly" ]; then
+    if [ -z "$outdir" ]; then
+      outdir="."
+    fi
+    ppsrc="$outdir/$(basename $src|sed 's/.S$/.asm/g')"
+    echo "$cl -nologo -EP $includes $defines $src > $ppsrc"
+    "$cl" -nologo -EP $includes $defines $src > $ppsrc || exit $?
+    output="$(echo $output | sed 's%/F[dpa][^ ]*%%g')"
+    args="-nologo -safeseh $single $output $ppsrc"
+
+    echo "$ml $args"
+    eval "\"$ml\" $args"
+    result=$?
+
+    # required to fix ml64 broken output?
+    #mv *.obj $outdir
+else
+    args="$md $args"
+    echo "$cl $args"
+    eval "\"$cl\" $args"
+    result=$?
+fi
+
+exit $result
+
diff --git a/patches/msvc b/patches/msvc
index 1856fd5..1a5c031 100644
--- a/patches/msvc
+++ b/patches/msvc
@@ -2,9 +2,15 @@ Index: libffi/ChangeLog.libffi
 ===================================================================
 --- libffi.orig/ChangeLog.libffi
 +++ libffi/ChangeLog.libffi
-@@ -1,3 +1,20 @@
+@@ -1,3 +1,26 @@
++2010-01-15  Anthony Green  <green@redhat.com>
++
++	* README: Add notes on building with Microsoft Visual C++.
++
 +2010-01-15  Daniel Witte  <dwitte@mozilla.com>
 +
++	* msvcc.sh: New file.
++
 +	* src/x86/win32.S: Port assembly routines to MSVC and #ifdef.
 +	* src/x86/ffi.c: Tweak function declaration and remove excess
 +	parens.
@@ -918,3 +924,22 @@ Index: libffi/src/x86/win32.S
 +
 +#endif /* !_MSC_VER */
 +
+Index: libffi/README
+===================================================================
+--- libffi.orig/README
++++ libffi/README
+@@ -109,6 +109,14 @@ will add some extra code which will supp
+ are using Purify with libffi. Only use this switch when using 
+ Purify, as it will slow down the library.
+ 
++It's also possible to build libffi on Windows platforms with
++Microsoft's Visual C++ compiler.  In this case, use the msvcc.sh
++wrapper script during configuration like so:
++
++path/to/configure --enable-shared --enable-static \
++	CC=path/to/msvcc.sh LD=link \
++	CPP=\"cl -nologo -EP\"
++
+ Configure has many other options. Use "configure --help" to see them all.
+ 
+ Once configure has finished, type "make". Note that you must be using