Re: [qemu-web PATCH] Fix link to Windows page in Wiki

[Mark Cave-Ayland]

On 11/09/2021 09:43, Howard Spoelstra wrote:

> On Sat, Sep 11, 2021 at 8:29 AM Helge Konetzka <hk@zapateado.de 
> <mailto:hk@zapateado.de>> wrote:
>
>     Am 10.09.21 um 17:44 schrieb Paolo Bonzini:
>      > On 25/08/21 18:43, Helge Konetzka wrote:
>      >> Furthermore I would like to propose to change the instructions for
>      >> Native builds with MSYS2 on Wiki Windows page.
>      >>
>      >> Please remove the section which copies system binaries to match the
>      >> expected file names!
>      >>
>      >> Instead define variables for configure (gcc-ar and gcc-ranlib are
>      >> existing copies of x86_64-w64-mingw32-gcc-ar and
>      >> x86_64-w64-mingw32-gcc-ranlib) and add strip to enable make install:
>      >>
>      >> AR=gcc-ar NM=nm OBJCOPY=objcopy RANLIB=gcc-ranlib WINDRES=windres
>      >> STRIP=strip \
>      >> ./configure --cross-prefix=x86_64-w64-mingw32- --enable-gtk --enable-sdl
>      >
>      > Do you even need anything but "./configure"? (possibly AR=gcc-ar NM=nm
>      > at the beginning)?
>
>     Sorry for being indistinct!
>
>     My intention was to put "AR=gcc-ar NM=nm OBJCOPY=objcopy
>     RANLIB=gcc-ranlib WINDRES=windres STRIP=strip" in front of "./configure"
>     (see the '\' after STRIP=strip) instead of copying binaries:
>
>     diff -Naur qemu.org.orig/Hosts/W32 qemu.org/Hosts/W32 
> <http://qemu.org/Hosts/W32>
>     --- qemu.org.orig/Hosts/W32     2021-09-11 08:27:01.198715675 +0200
>     +++ qemu.org/Hosts/W32 <http://qemu.org/Hosts/W32>  2021-09-11 
> 08:28:15.853605118
>     +0200
>     @@ -232,14 +232,6 @@
>            Close the MSYS2 console.
>            Start mingw64.exe.
>
>     -cd /mingw64/bin
>     -cp x86_64-w64-mingw32-gcc-ar.exe x86_64-w64-mingw32-ar.exe
>     -cp x86_64-w64-mingw32-gcc-ranlib.exe x86_64-w64-mingw32-ranlib.exe
>     -cp windres.exe x86_64-w64-mingw32-windres.exe
>     -cp nm.exe x86_64-w64-mingw32-nm.exe
>     -cp objcopy.exe x86_64-w64-mingw32-objcopy.exe
>     -cd ~
>     -
>            Download the QEMU source code:
>
>        git clone https://www.github.com/qemu/qemu 
> <https://www.github.com/qemu/qemu>
>     @@ -247,6 +239,7 @@
>            Finally build QEMU with:
>
>        cd qemu
>     +AR=gcc-ar NM=nm OBJCOPY=objcopy RANLIB=gcc-ranlib WINDRES=windres
>     STRIP=strip \
>        ./configure --cross-prefix=x86_64-w64-mingw32- --enable-gtk --enable-sdl
>        make
>
> Hi,
>
> I wrote those instructions as I obviously could not find a better way to get Qemu to 
> cross-compile using MSYS2 in Windows.
> When you look at configure, you see that only adding the cross-prefix will not find 
> the MSYS equivalents of some tools:
>
> ar="${AR-${cross_prefix}ar}"
> looks for x86_64-w64-mingw32-ar.exe and not (as it is named in MSYS2) 
> x86_64-w64-mingw32-gcc-ar.exe
>
> Perhaps it would be better to fix configure for the MSYS2 case so the flags or the 
> renaming are not required?

FWIW it was me that added the MSYS2 section to the wiki since I had a requirement to 
do some bespoke Windows builds (see 
https://wiki.qemu.org/index.php?title=Hosts/W32&diff=6803&oldid=5723).

As you can see at that point in time there was no need to copy binaries with 
different names, or pass --cross-prefix into configure.

So the question is: what has changed? I find it hard to believe that MSYS2/MingW64 is 
configured out-of-the-box to break a standard "./configure && make" build incantation.


ATB,

Mark.