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Date: Wed, 22 Dec 2010 18:03:03 +0100
Message-ID: <AANLkTimCp63K6WTO1tAjvyUfahVgQpYB2U9DAv=FjxE+@mail.gmail.com>
Subject: Re: mingw-targeted cross-compiler question
From: Kai Tietz <ktietz70 AT googlemail DOT com>
To: cygwin AT cygwin DOT com
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2010/12/22  <lemkemch AT t-online DOT de>:
> On Wed, 22 Dec 2010 15:36:01 +0100, Kai Tietz <ktietz70 AT googlemail DOT com>
> wrote:
>
>> 2010/12/22 =A0<lemkemch AT t-online DOT de>:
>>>
>>> On Wed, 22 Dec 2010 15:11:18 +0100, Kai Tietz <ktietz70 AT googlemail DOT com>
>>> wrote:
>>>
>>>> 2010/12/22 =A0<lemkemch AT t-online DOT de>:
>>>>>
>>>>> On Wed, 22 Dec 2010 14:13:15 +0100, Fr=E9d=E9ric Bron
>>>>> <frederic DOT bron AT m4x DOT org>
>>>>> wrote:
>>>>>
>>>>>>>>> I checked the Make file, it used this flag:
>>>>>>>>> gcc -mno-cygwin -g -Wl,--add-stdcall-alias -Wl,--export-all-symbo=
ls
>>>>>>>>> ...
>>>>>>>>
>>>>>>>> replace gcc by gcc-3
>>>>>>>> gcc 4 is now the default on cygwin but the cross compiler is not
>>>>>>>> supported for that version.
>>>>>>>> Fr=E9d=E9ric
>>>>>>>
>>>>>
>>>>> Well, I don't know but I'd really like to know what is the replacement
>>>>> these days for
>>>>>
>>>>> gcc -mno-cygwin -mwindows x.c
>>>>>
>>>>> I tried
>>>>>
>>>>> i686-w64-mingw32-gcc -mwindows =A0-m32 x.c
>>>>>
>>>>> but get
>>>>>
>>>>> x.c:35:13: error: expected '=3D', ',', ';', 'asm' or '__attribute__'
>>>>> before
>>>>> 'WinMain'
>>>>>
>>>>> and that also for all other option combinations that made sense to me.
>>>>>
>>>>> Thanks,
>>>>> Michael
>>>>
>>>> Btw the -m32 is superflous for the i686-w64-mingw32 cross-compiler, as
>>>> it just produces 32-bit and has no 64-bit capabilities builtin.
>>>> Could you show please your x.c file, as the message you get is a
>>>> compiler error already. I would assume that you missed to include some
>>>> header, or you were defining something which cause here the harm.
>>>
>>> Well, the program compiles just fine with the old gcc-3 -mno-cygwin but
>>> anyway, here's a stripped down version:
>>>
>>>
>>> #define WINVER 0x0500
>>> #include <windows.h>
>>>
>>> int STDCALL WinMain (HINSTANCE hInst, HINSTANCE hPrev, LPSTR lpCmd, int
>>> nShow) {
>>> =A0return 0;
>>> }
>>>
>>>
>>> =A0orion> i686-w64-mingw32-gcc -mwindows -m32 xx.c
>>> xx.c:4:13: error: expected '=3D', ',', ';', 'asm' or '__attribute__' be=
fore
>>> 'WinMain'
>>> =A0orion> gcc-3 -mno-cygwin -mwindows -m32 xx.c
>>> =A0orion>
>>>
>>>
>>
>> Well, the issue is STDCALL. We don't define this macro. Sorry, can
>> find a single hint on that in msdn. Use here instead the standard
>> WINAPI and it builds on all compilers you are using.
>
> Thanks, that fixed it. =A0Don't know where I got that STDCALL from,
> it certainly wasn't my invention. =A0However, the size of the executable
> for that noop program went up from about 21kb to about 100kb. =A0cygcheck
> lists the same dlls:
>
> =A0orion> gcc-3 -mno-cygwin -mwindows -m32 xx.c
> =A0orion> ls -ls a.exe
> 24 -rwxr-x--- 1 michael None 21347 Dec 22 17:18 a.exe
> =A0orion> cygcheck ./a.exe
> d:\cygwin\home\michael\a.exe
> =A0C:\WINDOWS\system32\msvcrt.dll
> =A0 =A0C:\WINDOWS\system32\KERNEL32.dll
> =A0 =A0 =A0C:\WINDOWS\system32\ntdll.dll
> =A0orion> i686-w64-mingw32-gcc -mwindows -m32 xx.c
> =A0orion> ls -ls a.exe
> 100 -rwxr-x--- 1 michael None 100582 Dec 22 17:21 a.exe
> =A0orion> cygcheck ./a.exe
> d:\cygwin\home\michael\a.exe
> =A0C:\WINDOWS\system32\KERNEL32.dll
> =A0 =A0C:\WINDOWS\system32\ntdll.dll
> =A0C:\WINDOWS\system32\msvcrt.dll
>
> Why would that be?
>
> Michael
>
>
> --
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>
>

This is caused by debugging information. Simply strip executable and
it should shrink.

Kai

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