How to build a DLL without cygwin DLL dependencies

How to build a DLL without cygwin DLL dependencies

[Jose Isaias Cabrera]

Greetings!

I am trying to build the latest sqlite windows DLL, and I am succeeding, but I am getting an error that cygwin1.dll is missing, when I am trying to use the DLL from outside cygwin in the Windows environment.  I am using,

gcc -shared sqlite3.c -o sqlite3.dll

to build it, but this command creates a dependency for cygwin1.dll.  Is there any way to build the dll as a standalone DLL with no dependency?  Thanks.

josé

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Re: How to build a DLL without cygwin DLL dependencies

[Tony Kelman]

> I am trying to build the latest sqlite windows DLL, and I am
> succeeding, but I am getting an error that cygwin1.dll is missing,
> when I am trying to use the DLL from outside cygwin in the Windows
> environment.  I am using,
>
> gcc -shared sqlite3.c -o sqlite3.dll
>
> to build it, but this command creates a dependency for cygwin1.dll.
> Is there any way to build the dll as a standalone DLL with no
> dependency?  Thanks.

Yep, you want the mingw-w64 cross compiler, x86_64-w64-mingw32-gcc
(or i686-w64-mingw32-gcc for 32 bit). There's a cross-compiled sqlite
package already available under mingw64-x86_64-sqlite3 in setup - or
http://mirrors.kernel.org/sourceware/cygwin/noarch/release/mingw64-x86_64-sqlite3/mingw64-x86_64-sqlite3-3.19.3-1.tar.xz
if you're okay with that particular release.

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Re: How to build a DLL without cygwin DLL dependencies

[Jose Isaias Cabrera]

Tony Kelman, on Wednesday, May 29, 2019 01:55 PM, wrote...
>>
>> gcc -shared sqlite3.c -o sqlite3.dll
>>
>> to build it, but this command creates a dependency for cygwin1.dll.
>> Is there any way to build the dll as a standalone DLL with no
>> dependency?  Thanks.
>
>Yep, you want the mingw-w64 cross compiler, x86_64-w64-mingw32-gcc
>(or i686-w64-mingw32-gcc for 32 bit).

Thanks for the prompt reply, Tony.

So, I downloaded "i686-w64-mingw32-gcc" from the setup packages and ran,

i686-w64-mingw32-gcc -shared sqlite3.c -o sqlite3.dll,

but it still wants me to add other DLLs.  I just want to drop the sqlite3.dll just created in another spot and run a tool using that without need of any other DLL. I know I can do it with MinGW, but I don't want to install two systems on my computer.  I know I am missing something because I know other folks have done it before.  I duckduckgo'ed some answers, but have not found anything but "use MinGW".  Is this even possible with cygwin and its packages?  Thanks for the support.

josé



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Re: How to build a DLL without cygwin DLL dependencies

[Tony Kelman]

> So, I downloaded "i686-w64-mingw32-gcc" from the setup packages and ran,
> i686-w64-mingw32-gcc -shared sqlite3.c -o sqlite3.dll,
> but it still wants me to add other DLLs.  I just want to drop the
> sqlite3.dll just created in another spot and run a tool using that
> without need of any other DLL. I know I can do it with MinGW, but I
> don't want to install two systems on my computer.  I know I am missing
> something because I know other folks have done it before.
> I duckduckgo'ed some answers, but have not found anything but
> "use MinGW".  Is this even possible with cygwin and its packages?

You just did "use MinGW with cygwin and its packages." MinGW is the
compiler triple you just used via a cross compiler. The end user
system won't need cygwin, and it won't need a compiler. Would be good
if you were more specific about what "it" you're referring to and which
"other DLLs" you mean. I just tried what you described:

curl -L https://www.sqlite.org/2019/sqlite-autoconf-3280000.tar.gz | tar -xz
cd sqlite-autoconf-3280000
i686-w64-mingw32-gcc -shared sqlite3.c -o sqlite3.dll

and dependency walker is telling me there are a few dependencies on
libgcc_s_sjlj-1.dll for __divdi3 etc. That's a compiler runtime dll
and you can avoid the issue by building a 64 bit dll, or in 32 bit via

i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll

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Re: How to build a DLL without cygwin DLL dependencies

[Jose Isaias Cabrera]

Tony Kelman, on Wednesday, May 29, 2019 04:18 PM, wrote...
>and you can avoid the issue by building a 64 bit dll, or in 32 bit via
>
>i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll
>

This is what I needed above. The command I was using,

i686-w64-mingw32-gcc -shared sqlite3.c -o sqlite3.dll

will create a DLL, but it will have dependencies on some cygwin libs.  This command,

i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll

creates a DLL with no dependencies.  So, the option -static-libgcc is what I needed.  Thanks.

To summarize, when creating SQLite3 DLL or building any SQLite3 tools with cygwin,
1. Download the i686-w65-mingw32-gcc compiler with the setup tools (the 64 bit)
2. Get the source from sqlite.org
3. untar source
4. cd to the source directory
5. run this command:
i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll

Thanks,

josé

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Re: How to build a DLL without cygwin DLL dependencies

[Tatsuro MATSUOKA]

--- jicma wrote:
> 
> Tony Kelman, on Wednesday, May 29, 2019 04:18 PM, wrote...
> >and you can avoid the issue by building a 64 bit dll, or in 32 bit via
> >
> >i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll
> >
> 
> This is what I needed above. The command I was using,
> 
> i686-w64-mingw32-gcc -shared sqlite3.c -o sqlite3.dll
> 
> will create a DLL, but it will have dependencies on some cygwin libs.  This command,
> 
> i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll
> 
> creates a DLL with no dependencies.  So, the option -static-libgcc is what I needed.  Thanks.
> 
> To summarize, when creating SQLite3 DLL or building any SQLite3 tools with cygwin,
> 1. Download the i686-w65-mingw32-gcc compiler with the setup tools (the 64 bit)
> 2. Get the source from sqlite.org
> 3. untar source
> 4. cd to the source directory
> 5. run this command:
> i686-w64-mingw32-gcc -shared -static-libgcc sqlite3.c -o sqlite3.dll
> 
> Thanks,
> 
> josé
> 
If you will have another opportunity to build natitve windows exe or dll, please consider to use msys2.

Tatsuro


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Re: How to build a DLL without cygwin DLL dependencies

[Jose Isaias Cabrera]

Tatsuro MATSUOKA, on Friday, May 31, 2019 01:01 PM, wrote...
> If you will have another opportunity to build natitve windows exe or dll, please consider to use msys2.

I tried, but the installation doesn't even come with gcc.  So, being behind a firewall, I couldn't use
pacman to get stuff installed.  So, I aborted the idea.  Thanks.

josé


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Re: How to build a DLL without cygwin DLL dependencies

[Brian Inglis]

On 2019-05-31 11:14, Jose Isaias Cabrera wrote:
> Tatsuro MATSUOKA, on Friday, May 31, 2019 01:01 PM, wrote...
>> If you will have another opportunity to build natitve windows exe or dll, 
>> please consider to use msys2.
> I tried, but the installation doesn't even come with gcc. So, being behind a 
> firewall, I couldn't use pacman to get stuff installed. So, I aborted the 
> idea.
Could you install WSL Debian/Ubuntu or use a Linux system to cross-build MSYS2
and sqlite3 as in https://arrayfire.com/cross-compile-to-windows-from-linux/

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