Add mingw64 support

Hi,

Using the attached patch to the blead source (as of a few hours ago), I can
build perl with the following OS/compiler/make combos.

On 32-bit XP:
MSVC++ 7.0 / dmake (uses win32/makefile.mk)
MSVC++ 7.0 / nmake (uses win32/Makefile)
Borland C++ 5.5.1 / dmake
mingw.org's gcc-4.3.0 / dmake
mingw.org's gcc-3.4.5 / dmake
mingw-w64.sf's 32-bit gcc-4.4.3 / dmake

(There's a bug with that last compiler on XP.
The perl it builds on XP hangs on XP, but runs ok if copied across to Vista.
I think this is unrelated to the patches - probably even unrelated to perl.
Without these patches perl will not even build using that last compiler.)

On 64-bit Vista:
32-bit MSVC++ 7.0 / nmake (uses win32/Makefile)
32-bit MSVC++ 7.0 / dmake (uses win32/makfile.mk)
32-bit Borland C++ 5.5.1 / dmake
mingw.org's 32-bit gcc-4.4.0 / dmake
mingw.org's 32-bit gcc-3.4.5 / dmake
mingw-w64.sf's 32-bit gcc-4.4.3 / dmake
mingw-w64.sf's 64-bit gcc-4.4.3 / dmake
mingw-w64.sf's 64-bit x86_64-w64-mingw32-gcc-4.4.3 / dmake
64-bit MicrosoftPlatform SDK for Windows Server 2003 R2 / dmake (uses
win32/makefile.mk)
64-bit MicrosoftPlatform SDK for Windows Server 2003 R2 / nmake (uses
win32/Makefile)

Not all of those builds pass all tests - but where the removal of the
patches still permits perl to build, the same tests still fail. That is,
*nothing* is lost by including these patches - but there are significant
gains.

Each of the above builds was done according to the normal win32
configuration parameters - ie multi-threaded, non debug. No unusual config
settings were applied. (I did build one debug perl on Vista using
mingw-w64.sf's 32-bit gcc-4.4.3 and it built fine.)

Please feel free to apply these patches (with or without modification) -
and, yes, you're more than welcome to blame me if they cause any breakages
;-)

Of course, some of those compilers (Borland, Microsoft, and the compilers
from mingw.org) already build perl *without* having to apply any patches.
It's just the other compilers that need the patches. The purpose of testing
with Borland, Microsoft, and the mingw.org compilers is just to check that
these patches don't break them.

As a final check, I've done a build on my aging linux (mandrake-9.1) box,
gcc-3.2.2. I built with '-des -Duselongdouble -Duse64bitint -Dusedevel'. No
problem with that, either.

If there's additional testing requirements please let me know, and I'll try
to oblige.

I believe the patch applied successfully for me - see below my sig for the
output.

Cheers,
Rob

Rob@desktop2 ~/GIT/blead
$ patch -p0 <blead_diff.diff
patching file dist/threads/threads.xs
patching file handy.h
patching file cpan/ExtUtils-MakeMaker/lib/ExtUtils/MM_Win32.pm
patching file op.c
Hunk #1 succeeded at 5774 (offset 47 lines).
patching file pp_pack.c
patching file util.c
Hunk #1 succeeded at 5366 (offset -28 lines).
patching file win32/makefile.mk
patching file win32/perlhost.h
patching file win32/win32.c
patching file win32/win32.h
patching file README.win32
patching file XSUB.h

12 files changed, 142 insertions, 26 deletions

diff --git a/README.win32 b/README.win32
index 231252a9e5..2a3a5b4afd 100644
--- a/README.win32
+++ b/README.win32
@@ -44,9 +44,18 @@ following compilers on the Intel x86 architecture:
       Borland C++           version 5.02 or later
       Microsoft Visual C++  version 2.0 or later
       MinGW with gcc        gcc version 2.95.2 or later
-
-The last of these is a high quality freeware compiler.  Use version
-3.2.x or later for the best results with this compiler.
+      Gcc by mingw.org        gcc version 2.95.2 or later
+      Gcc by mingw-w64.sf.net gcc version 4.4.3 or later
+
+Note that the last two of these are actually competing projects both
+delivering complete gcc toolchain for MS Windows:
+- http://mingw.org - delivers gcc toolchain targeting 32-bit Windows
+  platform.
+  Use version 3.2.x or later for the best results with this compiler.
+- http://mingw-w64.sf.net - delivers gcc toolchain targeting both 64-bit
+  Windows and 32-bit Windows platforms (despite the project name "mingw-w64"
+  they are not only 64-bit oriented). They deliver the native gcc compilers
+  + cross-compilers that are also supported by perl's makefile.
 
 The Borland C++ and Microsoft Visual C++ compilers are also now being given
 away free.  The Borland compiler is available as "Borland C++ Compiler Free
@@ -57,11 +66,19 @@ as part of the ".NET Framework SDK") and is the same compiler that ships with
 "Visual C++ .NET 2003 Professional" or "Visual C++ 2005/2008 Professional"
 respectively.
 
-This port can also be built on the Intel IA64 using:
+This port can also be built on IA64/AMD64 using:
 
       Microsoft Platform SDK	Nov 2001 (64-bit compiler and tools)
+      MinGW64 compiler (gcc version 4.4.3 or later)
 
 The MS Platform SDK can be downloaded from http://www.microsoft.com/.
+The MinGW64 compiler is available at http://sourceforge.net/projects/mingw-w64.
+The latter is actually a cross-compiler targeting Win64. There's also a trimmed
+down compiler (no java, or gfortran) suitable for building perl available at:
+http://svn.ali.as/cpan/users/kmx/strawberry_gcc-toolchain/
+
+NOTE: If you're using a 32-bit compiler to build perl on a 64-bit Windows
+operating system, then you should set the WIN64 environment variable to "undef".
 
 This port fully supports MakeMaker (the set of modules that
 is used to build extensions to perl).  Therefore, you should be
@@ -330,6 +347,9 @@ gcc-3.2.3.  It can be downloaded here:
 Perl also compiles with earlier releases of gcc (2.95.2 and up).  See below
 for notes about using earlier versions of MinGW/gcc.
 
+And perl also compiles with gcc-4.3.0 and up, and perhaps even some of the
+earlier 4.x.x versions.
+
 You also need dmake.  See L</"Make"> above on how to get it.
 
 =item MinGW release 1 with gcc
@@ -396,7 +416,16 @@ may end up building against the installed perl's lib/CORE directory rather
 than the one being tested.
 
 You will have to make sure that CCTYPE is set correctly and that
-CCHOME points to wherever you installed your compiler.
+CCHOME points to wherever you installed your compiler. If building with
+gcc-4.x.x, you'll also need to uncomment the assignment to GCC_4XX and
+uncomment the assignment to the appropriate GCCHELPERDLL in the makefile.mk.
+
+If building with the cross-compiler provided by
+mingw-w64.sourceforge.net you'll need to uncomment the line that sets
+GCCCROSS in the makefile.mk. Do this only if it's the cross-compiler - ie
+only if the bin folder doesn't contain a gcc.exe. (The cross-compiler
+does not provide a gcc.exe, g++.exe, ar.exe, etc. Instead, all of these
+executables are prefixed with 'x86_64-w64-mingw32-'.)
 
 The default value for CCHOME in the makefiles for Visual C++
 may not be correct for some versions.  Make sure the default exists
diff --git a/XSUB.h b/XSUB.h
index 5334cfc4f2..f23df37399 100644
--- a/XSUB.h
+++ b/XSUB.h
@@ -478,6 +478,12 @@ Rethrows a previously caught exception.  See L<perlguts/"Exception Handling">.
 #	undef setservent
 #endif	/* NETWARE */
 
+/* to avoid warnings: "xyz" redefined */
+#ifdef WIN32
+#    undef  popen
+#    undef  pclose
+#endif /* WIN32 */
+
 #    undef  socketpair
 
 #    define mkdir		PerlDir_mkdir
diff --git a/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MM_Win32.pm b/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MM_Win32.pm
index d3a5a4d507..15d4b3d19d 100644
--- a/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MM_Win32.pm
+++ b/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MM_Win32.pm
@@ -32,7 +32,8 @@ our $VERSION = '6.55_02';
 $ENV{EMXSHELL} = 'sh'; # to run `commands`
 
 my $BORLAND = $Config{'cc'} =~ /^bcc/i ? 1 : 0;
-my $GCC     = $Config{'cc'} =~ /^gcc/i ? 1 : 0;
+my $GCC     = $Config{'cc'} =~ /\bgcc$/i ? 1 : 0;
+my $DLLTOOL = $Config{'dlltool'} || 'dlltool';
 
 
 =head2 Overridden methods
@@ -309,9 +310,9 @@ $(INST_DYNAMIC): $(OBJECT) $(MYEXTLIB) $(BOOTSTRAP) $(INST_ARCHAUTODIR)$(DFSEP).
 ');
     if ($GCC) {
       push(@m,  
-       q{	dlltool --def $(EXPORT_LIST) --output-exp dll.exp
+       q{	}.$DLLTOOL.q{ --def $(EXPORT_LIST) --output-exp dll.exp
 	$(LD) -o $@ -Wl,--base-file -Wl,dll.base $(LDDLFLAGS) }.$ldfrom.q{ $(OTHERLDFLAGS) $(MYEXTLIB) $(PERL_ARCHIVE) $(LDLOADLIBS) dll.exp
-	dlltool --def $(EXPORT_LIST) --base-file dll.base --output-exp dll.exp
+	}.$DLLTOOL.q{ --def $(EXPORT_LIST) --base-file dll.base --output-exp dll.exp
 	$(LD) -o $@ $(LDDLFLAGS) }.$ldfrom.q{ $(OTHERLDFLAGS) $(MYEXTLIB) $(PERL_ARCHIVE) $(LDLOADLIBS) dll.exp });
     } elsif ($BORLAND) {
       push(@m,
diff --git a/dist/threads/threads.xs b/dist/threads/threads.xs
index 7d0ad23c31..5d98a59f2d 100755
--- a/dist/threads/threads.xs
+++ b/dist/threads/threads.xs
@@ -1,11 +1,17 @@
 #define PERL_NO_GET_CONTEXT
+/* Workaround for mingw 32-bit compiler by mingw-w64.sf.net - has to come before any #include.
+ * It also defines USE_NO_MINGW_SETJMP_TWO_ARGS for the mingw.org 32-bit compilers ... but
+ * that's ok as that compiler makes no use of that symbol anyway */
+#if defined(WIN32) && defined(__MINGW32__) && !defined(__MINGW64__)
+#  define USE_NO_MINGW_SETJMP_TWO_ARGS 1
+#endif
 #include "EXTERN.h"
 #include "perl.h"
 #include "XSUB.h"
 /* Workaround for XSUB.h bug under WIN32 */
 #ifdef WIN32
 #  undef setjmp
-#  if !defined(__BORLANDC__)
+#  if defined(USE_NO_MINGW_SETJMP_TWO_ARGS) || (!defined(__BORLANDC__) && !defined(__MINGW64__))
 #    define setjmp(x) _setjmp(x)
 #  endif
 #endif
diff --git a/handy.h b/handy.h
index d291eb6814..9ec64e0a09 100644
--- a/handy.h
+++ b/handy.h
@@ -190,8 +190,13 @@ typedef U64TYPE U64;
 #               define INT64_C(c)	CAT2(c,L)
 #               define UINT64_C(c)	CAT2(c,UL)
 #           else
-#               define INT64_C(c)	((I64TYPE)(c))
-#               define UINT64_C(c)	((U64TYPE)(c))
+#               if defined(_WIN64) && defined(_MSC_VER)
+#                   define INT64_C(c)	CAT2(c,I64)
+#                   define UINT64_C(c)	CAT2(c,UI64)
+#               else
+#                   define INT64_C(c)	((I64TYPE)(c))
+#                   define UINT64_C(c)	((U64TYPE)(c))
+#               endif
 #           endif
 #       endif
 #   endif
diff --git a/op.c b/op.c
index 8293fabd7c..bd783d7b47 100644
--- a/op.c
+++ b/op.c
@@ -5774,7 +5774,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
 	    if (PL_madskills) {
 		if (strEQ(name, "import")) {
 		    PL_formfeed = MUTABLE_SV(cv);
-		    Perl_warner(aTHX_ packWARN(WARN_VOID), "%lx\n", (long)cv);
+		    Perl_warner(aTHX_ packWARN(WARN_VOID), UVxf"\n", (UV)cv);
 		}
 	    }
 	    GvCVGEN(gv) = 0;
diff --git a/pp_pack.c b/pp_pack.c
index 18f17f7f56..03eaf7f886 100644
--- a/pp_pack.c
+++ b/pp_pack.c
@@ -321,10 +321,17 @@ S_mul128(pTHX_ SV *sv, U8 m)
 #  define DO_BO_UNPACK_PC(var)	DO_BO_UNPACK_PTR(var, i, int, char)
 #  define DO_BO_PACK_PC(var)	DO_BO_PACK_PTR(var, i, int, char)
 # elif PTRSIZE == LONGSIZE
-#  define DO_BO_UNPACK_P(var)	DO_BO_UNPACK_PTR(var, l, long, void)
-#  define DO_BO_PACK_P(var)	DO_BO_PACK_PTR(var, l, long, void)
-#  define DO_BO_UNPACK_PC(var)	DO_BO_UNPACK_PTR(var, l, long, char)
-#  define DO_BO_PACK_PC(var)	DO_BO_PACK_PTR(var, l, long, char)
+#  if LONGSIZE < IVSIZE && IVSIZE == 8
+#   define DO_BO_UNPACK_P(var)	DO_BO_UNPACK_PTR(var, 64, IV, void)
+#   define DO_BO_PACK_P(var)	DO_BO_PACK_PTR(var, 64, IV, void)
+#   define DO_BO_UNPACK_PC(var)	DO_BO_UNPACK_PTR(var, 64, IV, char)
+#   define DO_BO_PACK_PC(var)	DO_BO_PACK_PTR(var, 64, IV, char)
+#  else
+#   define DO_BO_UNPACK_P(var)	DO_BO_UNPACK_PTR(var, l, IV, void)
+#   define DO_BO_PACK_P(var)	DO_BO_PACK_PTR(var, l, IV, void)
+#   define DO_BO_UNPACK_PC(var)	DO_BO_UNPACK_PTR(var, l, IV, char)
+#   define DO_BO_PACK_PC(var)	DO_BO_PACK_PTR(var, l, IV, char)
+#  endif
 # elif PTRSIZE == IVSIZE
 #  define DO_BO_UNPACK_P(var)	DO_BO_UNPACK_PTR(var, l, IV, void)
 #  define DO_BO_PACK_P(var)	DO_BO_PACK_PTR(var, l, IV, void)
diff --git a/util.c b/util.c
index 5e5758dadd..0aab7868db 100644
--- a/util.c
+++ b/util.c
@@ -5366,7 +5366,7 @@ Perl_get_hash_seed(pTHX)
 	   * help.  Sum in another random number that will
 	   * fill in the low bits. */
 	  myseed +=
-	       (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
+	       (UV)(Drand01() * (NV)((((UV)1) << ((UVSIZE * 8 - RANDBITS))) - 1));
 #endif /* RANDBITS < (UVSIZE * 8) */
 	  if (myseed == 0) { /* Superparanoia. */
 	      myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
diff --git a/win32/makefile.mk b/win32/makefile.mk
index d46db1b2c3..a3924729d1 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -112,7 +112,7 @@ USE_LARGE_FILES	*= define
 #CCTYPE		*= MSVC90
 # Borland 5.02 or later
 #CCTYPE		*= BORLAND
-# MinGW with gcc-2.95.2 or later
+# MinGW or mingw-w64 with gcc-2.95.2 or later
 CCTYPE		*= GCC
 
 #
@@ -220,6 +220,29 @@ CCINCDIR	*= $(CCHOME)\include
 CCLIBDIR	*= $(CCHOME)\lib
 
 #
+# If building with gcc-4.x.x (or x86_64-w64-mingw32-gcc-4.x.x), then
+# uncomment  the following assignment to GCC_4XX, make sure that CCHOME
+# has been set correctly above, and uncomment the appropriate
+# GCCHELPERDLL line.
+# The name of the dll can change, depending upon which vendor has supplied
+# your 4.x.x compiler, and upon the values of "x".
+# (The dll will be in your mingw/bin folder, so check there if you're
+# unsure about the correct name.)
+# Without these corrections, the op/taint.t test script will fail.
+#
+#GCC_4XX		*= define
+#GCCHELPERDLL	*= $(CCHOME)\bin\libgcc_s_sjlj-1.dll
+#GCCHELPERDLL	*= $(CCHOME)\bin\libgcc_s_dw2-1.dll
+#GCCHELPERDLL	*= $(CCHOME)\bin\libgcc_s_1.dll
+
+#
+# uncomment this if you are using x86_64-w64-mingw32 cross-compiler
+# ie if your gcc executable is called 'x86_64-w64-mingw32-gcc'
+# instead of the usual 'gcc'.
+#
+#GCCCROSS	*= define
+
+#
 # Additional compiler flags can be specified here.
 #
 BUILDOPT	*= $(BUILDOPTEXTRA)
@@ -475,11 +498,15 @@ LINK_FLAGS	+= -L"$(CCLIBDIR)\Release"
 
 .ELIF "$(CCTYPE)" == "GCC"
 
-CC		= gcc
-LINK32		= g++
-LIB32		= ar rc
-IMPLIB		= dlltool
-RSC		= windres
+.IF "$(GCCCROSS)" == "define"
+ARCHPREFIX      = x86_64-w64-mingw32-
+.ENDIF
+
+CC		= $(ARCHPREFIX)gcc
+LINK32		= $(ARCHPREFIX)g++
+LIB32		= $(ARCHPREFIX)ar rc
+IMPLIB		= $(ARCHPREFIX)dlltool
+RSC		= $(ARCHPREFIX)windres
 
 i = .i
 o = .o
@@ -491,6 +518,9 @@ a = .a
 
 INCLUDES	= -I.\include -I. -I.. -I$(COREDIR)
 DEFINES		= -DWIN32 $(CRYPT_FLAG)
+.IF "$(WIN64)" == "define"
+DEFINES		+= -DWIN64 -DCONSERVATIVE
+.ENDIF
 LOCDEFS		= -DPERLDLL -DPERL_CORE
 SUBSYS		= console
 CXX_FLAG	= -xc++
@@ -783,8 +813,18 @@ CFGH_TMPL	= config_H.bc
 
 .ELIF "$(CCTYPE)" == "GCC"
 
+.IF "$(WIN64)" == "define"
+.IF "$(GCCCROSS)" == "define"
+CFGSH_TMPL	= config.gc64
+CFGH_TMPL	= config_H.gc64
+.ELSE
+CFGSH_TMPL	= config.gc64nox
+CFGH_TMPL	= config_H.gc64nox
+.ENDIF
+.ELSE
 CFGSH_TMPL	= config.gc
 CFGH_TMPL	= config_H.gc
+.ENDIF
 PERLIMPLIB	= ..\libperl511$(a)
 PERLSTATICLIB	= ..\libperl511s$(a)
 
@@ -1220,7 +1260,7 @@ $(PERLDLL): perldll.def $(PERLDLL_OBJ) $(PERLDLL_RES) Extensions_static
 	    $(mktmp $(LKPRE) $(PERLDLL_OBJ) \
 		$(shell @type Extensions_static) \
 		$(LIBFILES) $(LKPOST))
-	dlltool --output-lib $(PERLIMPLIB) \
+	$(IMPLIB) --output-lib $(PERLIMPLIB) \
 		--dllname $(PERLDLL:b).dll \
 		--def perldll.def \
 		--base-file perl.base \
@@ -1582,6 +1622,11 @@ test-prep : all utils
 .ELSE
 	$(XCOPY) $(GLOBEXE) ..\t\$(NULL)
 .ENDIF
+.IF "$(CCTYPE)" == "GCC"
+.IF "$(GCC_4XX)" == "define"
+	$(XCOPY) $(GCCHELPERDLL) ..\t\$(NULL)
+.ENDIF
+.ENDIF
 
 test : $(RIGHTMAKE) test-prep
 	cd ..\t && $(PERLEXE) -I..\lib harness $(TEST_SWITCHES) $(TEST_FILES)
diff --git a/win32/perlhost.h b/win32/perlhost.h
index c2473c93f7..d486246234 100644
--- a/win32/perlhost.h
+++ b/win32/perlhost.h
@@ -1747,7 +1747,7 @@ win32_start_child(LPVOID arg)
     parent_message_hwnd = w32_message_hwnd;
     w32_message_hwnd = win32_create_message_window();
     if (parent_message_hwnd != NULL)
-        PostMessage(parent_message_hwnd, WM_USER_MESSAGE, w32_pseudo_id, (LONG)w32_message_hwnd);
+        PostMessage(parent_message_hwnd, WM_USER_MESSAGE, w32_pseudo_id, (LPARAM)w32_message_hwnd);
 
     /* push a zero on the stack (we are the child) */
     {
diff --git a/win32/win32.c b/win32/win32.c
index 41fae60b66..e6674e1101 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -2014,7 +2014,7 @@ win32_uname(struct utsname *name)
 	GetSystemInfo(&info);
 
 #if (defined(__BORLANDC__)&&(__BORLANDC__<=0x520)) \
- || (defined(__MINGW32__) && !defined(_ANONYMOUS_UNION))
+ || (defined(__MINGW32__) && !defined(_ANONYMOUS_UNION) && !defined(__MINGW_EXTENSION))
 	procarch = info.u.s.wProcessorArchitecture;
 #else
 	procarch = info.wProcessorArchitecture;
diff --git a/win32/win32.h b/win32/win32.h
index c14367a4c5..3916b2e1f6 100644
--- a/win32/win32.h
+++ b/win32/win32.h
@@ -58,6 +58,23 @@
 #define  WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
+/*
+ * Bug in winbase.h in mingw-w64 4.4.0-1 at least... they
+ * do #define GetEnvironmentStringsA GetEnvironmentStrings and fail
+ * to declare GetEnvironmentStringsA.
+ */
+#if defined(__MINGW64__) && defined(GetEnvironmentStringsA) && !defined(UNICODE)
+#ifdef __cplusplus
+extern "C" {
+#endif
+#undef GetEnvironmentStringsA
+WINBASEAPI LPCH WINAPI GetEnvironmentStringsA(VOID);
+#define GetEnvironmentStrings GetEnvironmentStringsA
+#ifdef __cplusplus
+}
+#endif
+#endif
+
 #ifdef   WIN32_LEAN_AND_MEAN		/* C file is NOT a Perl5 original. */
 #define  CONTEXT	PERL_CONTEXT	/* Avoid conflict of CONTEXT defs. */
 #endif /*WIN32_LEAN_AND_MEAN */