[ITP] mingw-w64
Charles Wilson
cygwin@cwilson.fastmail.fm
Wed Jun 30 16:36:00 GMT 2010
On 6/29/2010 1:13 PM, JonY wrote:
> On 6/30/2010 00:10, Charles Wilson wrote:
>> Now, I thought you wanted to use the w64 prefix as a "project origin"
>> indicator, and assumed that "-mingw64-" would be the "target bitdepth"
>> indicator. However, given "w64-mingw64-pthreads-devel32" and
>> "w32-mingw64-pthreads-headers32" I'm not sure that's the case. It seems
>> NOW that you want to use 'mingw64' as the "project origin" indicator,
>> and "w64"/"w32" as the target bit depth (and I'm sure the trailing '32'
>> in these two anomalies is unnecessary).
>>
>> So, I think I'd put the project origin first, followed by the bit depth.
>>
>
> Yes, I was using w64/w32 as bitness indicator, as with some releases
> made with the buildbot on sf, mingw64 to differentiate it from mingw.org.
Ah. Well, in that case I would think that the origin should come first,
rather than the bitdepth. Our existing mingw-runtime package is from
(effectively) mingw.org, after all (*).
More below.
(*) Well, both mingw.org mingwrt and cygwin's mingw-runtime come from a
common repository: the winsup/mingw directory on sourceware's CVS
server. [note that the "mingwrt" and "w32api" parts of "mingw.org" are
hosted by sourceware; all the rest of "mingw.org" including other source
code repos are hosted by sourceFORGE. The reason for the split is
historical.]
I don't know much about sf's buildbot; I assume that if you can get a
cygport to DTRT on your home PC without human intervention except for
kicking off the build, then you can convince the buildbot to do it for you?
> The trailing 32/64 is to indicate which toolchain the pthreads implibs
> are for, it is too possible to setup a 32bit default multilib setup, the
> current toolchain is defaulting to 64bit. So w64*devel32 means 64bit
> implib for 32bit default toolchain that has yet to bet setup.
>
> For the current multilib toolchain example, users would want w32*devel64
> and w64*devel64 pthreads packages, 32bit and 64bit implib for 64bit
> default toolchain (the tarballs have the same installation path to the
> 64bit libdir).
Hmm. So, big picture, we have possibly three different mingw-ish
compilers, and you're currently attempting to shepherd the first one,
while being mindful of future issues related to simultaneous
installation of both of the first two:
(1) mingw64-derived, multilib, default 64bit
(2) mingw64-derived, multilib, default 32bit
(3) mingw.org-derived, non-multilib, only 32bit
In the first two cases, they each must deliver some components in both
32 and 64 bit form, while some components (within a single case 1 or 2)
are shared. However, NO components are shared BETWEEN any of the three
cases, not even between (1) and (2). (**)
(**) except for a possible sharing of target runtime DLLs with the same
target bitdepth, but that's a small matter, discussed at the end of this
email.
Correct so far?
Now, SOME of the components that cannot be shared between (1) and (2)
will be IDENTICAL in content, EXCEPT that they get installed into
different locations. This would include, for instance, the runtime DLLs
for, say, 32bit libgcc1 (UNLESS the 'share the target runtimes between
(1) and (2)' approach is taken, but assume for the moment that we do
not; wait until the end of this email for that discussion).
So, we need a naming scheme that accounts for:
1) origin
2) default bit depth of the tool chain
3) bit depth of the target
I think I would drop 'w64' since that's abiguous. "windows 64? is that
tool chain default, so I've got to use -m32 if I want 32bit, or is that
the actual bit depth of the contents, like "import libraries for linking
64bit target executables?" (Aside: I pity the organizational nightmare
that you have to deal with over at mingw64.org, because you've got yet
another set of 32/64 bifurcations: what is the bit depth of the
toolchain EXE's themselves: is ld.exe a 32bit or 64bit executable...at
least cygwin is just...cygwin.)
In fact, for complete clarity, I think I'd use:
-tc64- or -tc32- == toolchain default bitdepth 64 or 32
-m64- or -m32- == bit depth 64 or 32(use "m" as a mnemonic
for which "-mNN" option it corresponds to)
(And, returning to the aside, that 'frees up' the 'w64'/'w32' tag for
use in distinguishing the bit depth of native windows ld.exe/gcc.exe:
w64-gcc4 contains a binary gcc4.exe that runs as a 64bit native windows
application. Not that you guys need or want to use an elaborate package
naming scheme like it appears we need here. You don't have setup.exe to
worry about.)
If something is common to BOTH, then just drop that element. E.g. both
the -m32 and -m64 mingw headers are provided by the same package, so
that package would have only "mingw64-tc64-". OTOH, if you split the
mingw import libs for the defaults-to-64bit toolchain between the
"normal" ones (for that toolchain, e.g. 64bit) and the lib32/ ones, then
you'd have "mingw64-tc64-m64" and "mingw64-tc64-m32"
And, I'd put all that categorization up front, so that the actual
package content name is right next to the version (e.g.
"gcc4-g++-VERSION-REL". So, for the toolchain derived from mingw64,
which is compiled to support 64 bit targets by default but is multilib,
you'd have:
mingw64 default-to-64bit toolchain
==================================
core components
---------------
mingw64-tc64-binutils-2.20.51-1
mingw64-tc64-gcc4-4.6.20100619-1
mingw64-tc64-gcc4-g++-4.6.20100619-1
mingw64-tc64-headers-20100628-1
mingw64-tc64-m64-crt-20100628-1
mingw64-tc64-m32-crt-20100628-1
runtime libs
---------------
mingw64-tc64-m64-libgcc1 [1a]
mingw64-tc64-m64-libstdc++6 [2a]
mingw64-tc64-m64-libgfortran3 etc
mingw64-tc64-m64-libgomp1 etc
mingw64-tc64-m64-libssp0 etc
mingw64-tc64-m32-libgcc1 [3a]
mingw64-tc64-m32-libstdc++6 [4a]
mingw64-tc64-m32-libgfortran3 etc
mingw64-tc64-m32-libgomp1 etc
mingw64-tc64-m32-libssp0 etc
runtime devel
---------------
mingw64-tc64-m64-libstdc++-devel
mingw64-tc64-m64-libgfortran-devel
mingw64-tc64-m64-libgomp-devel
mingw64-tc64-m64-libssp-devel
mingw64-tc64-m32-libstdc++-devel
mingw64-tc64-m32-libgfortran-devel
mingw64-tc64-m32-libgomp-devel
mingw64-tc64-m32-libssp-devel
pthread devel
---------------
mingw64-tc64-m32-pthreads-devel (was w64-mingw64-pthreads-devel32)
mingw64-tc64-m64-pthreads-devel (was w64-mingw64-pthreads-devel64)
mingw64-tc64-pthreads-headers (was w64-mingw64-pthreads-headers64)
(note: headers shared between both -m32 and -m64, for this
toolchain?)
pthread runtime
---------------
not sure yet...but you probably get the idea of the pattern.
mingw64 default-to-32bit toolchain
==================================
core components
---------------
mingw64-tc32-binutils-2.20.51-1
mingw64-tc32-gcc4-4.6.20100619-1
mingw64-tc32-gcc4-g++-4.6.20100619-1
mingw64-tc32-headers-20100628-1
mingw64-tc32-m64-crt-20100628-1
mingw64-tc32-m32-crt-20100628-1
runtime libs
---------------
mingw64-tc32-m64-libgcc1 [1b]
mingw64-tc32-m64-libstdc++6 [2b]
mingw64-tc32-m64-libgfortran3 etc
mingw64-tc32-m64-libgomp1 etc
mingw64-tc32-m64-libssp0 etc
mingw64-tc32-m32-libgcc1 [3b]
mingw64-tc32-m32-libstdc++6 [4b]
mingw64-tc32-m32-libgfortran3 etc
mingw64-tc32-m32-libgomp1 etc
mingw64-tc32-m32-libssp0 etc
runtime devel
---------------
mingw64-tc32-m64-libstdc++-devel
mingw64-tc32-m64-libgfortran-devel
mingw64-tc32-m64-libgomp-devel
mingw64-tc32-m64-libssp-devel
mingw64-tc32-m32-libstdc++-devel
mingw64-tc32-m32-libgfortran-devel
mingw64-tc32-m32-libgomp-devel
mingw64-tc32-m32-libssp-devel
pthread devel
---------------
mingw64-tc32-m32-pthreads-devel (was w32-mingw64-pthreads-devel32)
mingw64-tc32-m64-pthreads-devel (was w32-mingw64-pthreads-devel64)
mingw64-tc32-pthreads-devel (was w32-mingw64-pthreads-headers32)
(note: headers shared between both -m32 and -m64, for this
toolchain?)
pthread runtime
---------------
not sure yet...but you probably get the idea of the pattern.
The, obviously, the mingw.org compiler -- if cygwin ever got one --
would prefix all of its elements with "mingw-" and no "toolchain
bitdepth" or "target bitdepth" because, right now, it supports only
32bits. So everything would be -tc32-m32- which is rather silly.
[1] These two packages [1a] and [1b] contain a DLL that is identical,
but "lives" in a different location buried under the compiler's private
lib area:
mingw64-tc64-m64-libgcc1 : */lib/gcc/x86_64-w64-mingw32/4.6.0/
mingw64-tc32-m64-libgcc1 : */lib/gcc/i686-w64-mingw32/4.6.0/64/
If we had a /opt/mingw64/bin64 and /opt/mingw64/bin32/ "standard" then
maybe the DLLs would go there, and you'd consolidate these two DLL
packages into a single common package that just installs one copy of
this specific DLL into
/opt/mingw64/bin64/
But we don't yet, so for now "buried" -- e.g. two separate identical
copies in separate non-conflicting locations -- is good.
[2] Ditto
mingw64-tc64-m64-libstdc++6 :
*/lib/gcc/x86_64-w64-mingw32/4.6.0/libstdc++-6.dll
mingw64-tc32-m64-libstdc++6 :
*/lib/gcc/i686-w64-mingw32/4.6.0/64/libstdc++-6.dll
vs.
/opt/mingw64/bin64/
[3] Ditto, /opt/mingw64/bin32/
mingw64-tc64-m32-libgcc1 : */lib/gcc/x86_64-w64-mingw32/4.6.0/32/
mingw64-tc32-m32-libgcc1 : */lib/gcc/i686-w64-mingw32/4.6.0/
vs.
/opt/mingw64/bin32/
[4] Ditto
mingw64-tc64-m32-libstdc++6 :
*/lib/gcc/x86_64-w64-mingw32/4.6.0/32/libstdc++-6.dll
mingw64-tc32-m32-libstdc++6 :
*/lib/gcc/i686-w64-mingw32/4.6.0/libstdc++-6.dll
vs.
/opt/mingw64/bin32/
> The pthreads naming is a bit confusing (to myself as well). I should
> change it to something easier. Ideas welcome.
Well, if the ideas above make sense, then it should be pretty
straightforward to extend them to libpthread2.
>> Except that in this case, the linker and compiler executables themselves
>> are ACTUALLY i686-pc-cygwin, so...
>>
>
> No, it isn't meant to signify host. It is a workaround for GCC insisting
> on using "/mingw" for all mingw* targets, hence there is a "mingw"
> symlink to point to "x86_64-w64-mingw32". I'm sure we don't want a
> /usr/mingw clashing around if we do ever want another mingw cross
> compiler in Cygwin.
I see. That's an *interesting* consequence of the "Default to /mingw"
behavior of non-cross-compiler versions of mingw-gcc; which ends up as
'C:\MinGW\' when the exe is built without posix (cygwin) support.
>> Which leads to...use a different prefix as the only viable choice, I
>> think (I'd go with /opt/mingw64/). Or asking to use a non-standard
>> --datarootdir -- and HOPE that the only conflicts we ever discover are
>> these /usr/share ones.
>>
>>
>
> I'm also not too sure how to proceed, --datarootdir sounds good.
Well, putting everything from mingw64 into /opt/mingw64 would also work.
So the exe's (for both the default-to-64bit toolchain and the
default-to-32bit toolchain) would go in
/opt/mingw64/bin/
as well as the typical "cross-compiler" copies of those exe's in
/opt/mingw64/x86_64-w64-mingw32/bin/ and
/opt/mingw64/i686-w64-mingw32/bin/
As cygwin apps, these would likely depend, themselves, on DLLs in
/usr/bin -- but that just means that /usr/bin/ must be in $PATH when
launching these tools. But that's ALWAYS true for cygwin apps.
BUT, you'd have the added freedom of establishing also
/opt/mingw64/bin32/ and
/opt/mingw64/bin64/
specifically for the target DLLs (libgcc1_sjlj.dll, libstdc++6.dll,
libpthread2.dll, etc) for the two separate bitdepths. This would allow
you to consolidate the duplicate DLL packages [1a] == [1b], [2a] ==
[2b], [3a] == [3b], [4a] == [4b], etc, above.
As for the rest of your reply...
OK, ignore my silly comments about extra symlinks.
>> LIBGCC RUNTIME DLL
>> ===================================
>> w64-mingw64-gcc4-libgcc1-4.6.20100619-1.tar.bz2
>>
>> (First, no need to include 'gcc4' in the library package name).
>>
>
> I'm not sure how to do this with cygport. Any ideas?
In the cygport file, you can specify exactly the name of all
sub-packages. Here's the relevant bit from gettext's cygport
PKG_NAMES="${PN} ${PN}-devel libgettextpo0 libasprintf0 libintl8"
PKG_HINTS="${PN} ${PN}-devel libgettextpo0 libasprintf0 libintl8"
The contents of the different packages in this case are controlled by
the following files, created by the .cygwin.patch:
gettext-0.17/CYGWIN-PATCHES/gettext-devel.list | 36 ++
gettext-0.17/CYGWIN-PATCHES/gettext.list | 33 ++
gettext-0.17/CYGWIN-PATCHES/libasprintf0.list | 1
gettext-0.17/CYGWIN-PATCHES/libgettextpo0.list | 3
gettext-0.17/CYGWIN-PATCHES/libintl8.list | 1
as long as the *.list name matches the value in PKG_NAMES, it will be
use. A more common approach is (from ncurses cygport):
PKG_NAMES="${PN} lib${PN}${NCURSES_ABI} lib${PN}-devel ${PN}-demo terminfo"
PKG_HINTS="${PN} lib${PN}${NCURSES_ABI} lib${PN}-devel ${PN}-demo terminfo"
PKG_CONTENTS[0]="--exclude=usr/bin/*.dll --exclude=usr/bin/*-config
usr/bin usr/share/doc/${PN} usr/share/doc/Cygwin usr/share/man/man1
usr/share/man/man5 usr/share/man/man7"
PKG_CONTENTS[1]='usr/bin/*.dll'
PKG_CONTENTS[2]='--exclude=usr/lib/ncurses etc usr/bin/*-config usr/lib
usr/include usr/share/man/man3'
PKG_CONTENTS[3]='usr/lib/ncurses'
PKG_CONTENTS[4]='usr/share/terminfo usr/share/tabset'
Where the element of the PKG_CONTENTS array is used when creating the
tarball for the corresponding PKG_NAME.
>
> Ok, right now, I should make all the dlls package common to 32bit and
> 64bit defaulting toolchain, but I'm not too sure how to do it with
> cygport. Any ideas?
Well, I *assume* that you build the default-to-64bit gcc *completely*
separately from the default-to-32bit? That is, there's a
something-something-gcc-VER-REL-src.tar.bz2 for the default-to-32bit
toolchain, and a something-something-gcc-VER-REL-src.tar.bz2 for the
default-to-64bit one? And each -src tarball contains a separate
something-something-gcc-VER-REL.cygport?
IF you wanted to ship only a single copy of the appropriate runtime DLL,
to be used by both toolchains, FIRST you need to decide where it should
go. If it's to be shared, then it can't go under
*/x86_64-w64-mingw32/* anywhere, nor
*/i686-w64-mingw32/*
because then they wouldn't be "sharing". One toolchain would have to
"know" about the other somehow. Ick.
However, you can't simply stick them in /usr/bin (or /opt/mingw64/bin,
whatever), because the true 64bit version and the 32bit version both
have the same name. Also Ick.
That's why I suggest a "top-level" */bin32 and */bin64 specifically for
these target DLLs, so that they can be shared by both the default-to-64
and default-to-32 toolchains. However, cygwin package standards don't
allow additional top-level dirs under / or /usr. So... /bin32 and
/usr/bin32 are out.
Hence, the advantages of you putting everything under /opt/mingw64/.
You'd OWN that directory tree. Do whatever you like under there.
Once you make your decision about WHERE the target DLLs should go,
ensuring you only have one version is easy: both cygports will build and
create all the appropriate packages.
The default-to-64 cygport would create (for example) under the "rules" above
mingw64-tc64-m64-libgcc1-VER-REL.tar.bz2
containing
/opt/mingw64/bin64/libgcc1_sjlj.dll
while the default-to-32 cygport would create (for example)
mingw64-tc32-m64-libgcc1-VER-REL.tar.bz2
ALSO containing
/opt/mingw64/bin64/libgcc1_sjlj.dll
Ideally, these two DLLs would be identical. Assuming that is the case,
then you rename one of those two tarballs
mingw64-m64-libgcc1-VER-REL.tar.bz2
(e.g. drop the -tc64-). Ditto for
mingw64-m32-libgcc1-VER-REL.tar.bz2
and all the other toolchain runtime libs (incl. libpthread2 ?)
As a final shortcut, you tweak both cygports to create
non-tc*-differentiated tarballs for the target runtime dlls to begin
with, so in the end, both cygports create
mingw64-m64-libgcc1-VER-REL.tar.bz2 <<< gen by -tc64- cygport
mingw64-m32-libgcc1-VER-REL.tar.bz2 <<< gen by -tc64- cygport
mingw64-m64-libgcc1-VER-REL.tar.bz2 <<< gen by -tc32- cygport
mingw64-m32-libgcc1-VER-REL.tar.bz2 <<< gen by -tc32- cygport
rather than
mingw64-tc64-m64-libgcc1-VER-REL.tar.bz2 <<< gen by -tc64- cygport
mingw64-tc64-m32-libgcc1-VER-REL.tar.bz2 <<< gen by -tc64- cygport
mingw64-tc32-m64-libgcc1-VER-REL.tar.bz2 <<< gen by -tc32- cygport
mingw64-tc32-m32-libgcc1-VER-REL.tar.bz2 <<< gen by -tc32- cygport
and you simply upload only one of each pair.
--
Chuck
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