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digitalmars.D.learn - Error: undefined symbol: _WinMain 16 When try compile no console

reply Marcone <marcone email.com> writes:
Using -L/SUBSYSTEM:windows user32.lib

Error:

lld-link: error: undefined symbol: _WinMain 16

 referenced by 
 msvcrt120.lib(msvcrt_stub2.obj):(_WinMainCRTStartup)






Error: linker exited with status 1
May 19 2022
parent reply Adam D Ruppe <destructionator gmail.com> writes:
On Thursday, 19 May 2022 at 19:29:25 UTC, Marcone wrote:

 Using -L/SUBSYSTEM:windows user32.lib


you using a main() function right?

Please note when compiling on Win64, you need to explicitly list 
-Lgdi32.lib -Luser32.lib on the build command. If you want the 
Windows subsystem too, use -L/subsystem:windows 
-L/entry:mainCRTStartup.

If using ldc instead of dmd, use -L/entry:wmainCRTStartup instead 
of mainCRTStartup; note the "w".


see some deets i wrote here

http://arsd-official.dpldocs.info/arsd.simpledisplay.html#installation-instructions
May 19 2022
parent reply Marcone <marcone email.com> writes:
On Thursday, 19 May 2022 at 19:35:20 UTC, Adam D Ruppe wrote:

 On Thursday, 19 May 2022 at 19:29:25 UTC, Marcone wrote:

 Using -L/SUBSYSTEM:windows user32.lib


 you using a main() function right?

 Please note when compiling on Win64, you need to explicitly 
 list -Lgdi32.lib -Luser32.lib on the build command. If you want 
 the Windows subsystem too, use -L/subsystem:windows 
 -L/entry:mainCRTStartup.

 If using ldc instead of dmd, use -L/entry:wmainCRTStartup 
 instead of mainCRTStartup; note the "w".


 see some deets i wrote here

 http://arsd-official.dpldocs.info/arsd.simpledisplay.html#installation-instructions


I am using a main() function.
I am compiling on Windows x86 32 bits.
I am using DMD 2.100.0
This error is only in version 2.100.0 of DMD.
May 19 2022
next sibling parent reply Adam D Ruppe <destructionator gmail.com> writes:
On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:

 I am using a main() function.
 I am compiling on Windows x86 32 bits.
 I am using DMD 2.100.0
 This error is only in version 2.100.0 of DMD.


Are you using the `-L/entry:mainCRTStartup` or the 
`L/entry:wmainCRTStartup` ?
May 19 2022
parent reply Marcone <marcone email.com> writes:
On Thursday, 19 May 2022 at 20:33:34 UTC, Adam D Ruppe wrote:

 On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:

 I am using a main() function.
 I am compiling on Windows x86 32 bits.
 I am using DMD 2.100.0
 This error is only in version 2.100.0 of DMD.


 Are you using the `-L/entry:mainCRTStartup` or the 
 `L/entry:wmainCRTStartup` ?


-L/entry:mainCRTStartup
May 19 2022
parent reply Adam Ruppe <destructionator gmail.com> writes:
On Thursday, 19 May 2022 at 21:41:50 UTC, Marcone wrote:

 Are you using the `-L/entry:mainCRTStartup` or the 
 `L/entry:wmainCRTStartup` ?


 -L/entry:mainCRTStartup


try the w one too. both doing the same result?
May 19 2022
parent Marcone <marcone email.com> writes:
On Thursday, 19 May 2022 at 22:13:06 UTC, Adam Ruppe wrote:

 On Thursday, 19 May 2022 at 21:41:50 UTC, Marcone wrote:

 Are you using the `-L/entry:mainCRTStartup` or the 
 `L/entry:wmainCRTStartup` ?


 -L/entry:mainCRTStartup


 try the w one too. both doing the same result?


Both is doing the same result.
May 19 2022
prev sibling parent reply frame <frame86 live.com> writes:
On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:


 I am using a main() function.
 I am compiling on Windows x86 32 bits.
 I am using DMD 2.100.0
 This error is only in version 2.100.0 of DMD.


Did you try 2.099 too? Because the default build mode for 32bit 
was changed to MS-COFF and it smells a litte bit that you have 
used OMF before. MS-COFF format inserts the reference to the 
C-runtime library automatically.

Try the -m32omf switch.
May 20 2022
next sibling parent Marcone <marcone email.com> writes:
On Friday, 20 May 2022 at 13:16:00 UTC, frame wrote:

 On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:


 I am using a main() function.
 I am compiling on Windows x86 32 bits.
 I am using DMD 2.100.0
 This error is only in version 2.100.0 of DMD.


 Did you try 2.099 too? Because the default build mode for 32bit 
 was changed to MS-COFF and it smells a litte bit that you have 
 used OMF before. MS-COFF format inserts the reference to the 
 C-runtime library automatically.

 Try the -m32omf switch.


Now work fine! Thank you.
May 20 2022
prev sibling parent reply Marcone <marcone email.com> writes:
On Friday, 20 May 2022 at 13:16:00 UTC, frame wrote:

 On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:


 I am using a main() function.
 I am compiling on Windows x86 32 bits.
 I am using DMD 2.100.0
 This error is only in version 2.100.0 of DMD.


 Did you try 2.099 too? Because the default build mode for 32bit 
 was changed to MS-COFF and it smells a litte bit that you have 
 used OMF before. MS-COFF format inserts the reference to the 
 C-runtime library automatically.

 Try the -m32omf switch.


I tried compiling now on x64 without console using 
-L/SUBSYSTEM:windows user32.lib -L/entry:mainCRTStartup -m64 and 
it doesn't work. It compiles, but the program does not run 
afterwards. I also tried to add -m32omf But in this case the 
compilation error. How to solve this?
May 26 2022
parent frame <frame86 live.com> writes:
On Thursday, 26 May 2022 at 16:56:49 UTC, Marcone wrote:

 On Friday, 20 May 2022 at 13:16:00 UTC, frame wrote:

 On Thursday, 19 May 2022 at 20:20:49 UTC, Marcone wrote:





 I tried compiling now on x64 without console using 
 -L/SUBSYSTEM:windows user32.lib -L/entry:mainCRTStartup -m64 
 and it doesn't work. It compiles, but the program does not run 
 afterwards. I also tried to add -m32omf But in this case the 
 compilation error. How to solve this?


There is no support for OMF for x64, 64bit build is always 
MS-COFF.

If you specify -m64 you will generate x64 MS-COFF files.
If you specify -m32mscoff you will generate x86 32bit MS-COFF 
files.
If you specify -m32omf you will generate x86 32bit OMF files.

Maybe you need to clear your object files (if any) for a clean 
build.

If you tell the linker to entry on `mainCRTStartup`, it is 
expected to use that function from a C-runtime linked. As the 
compiler is free to select a library, this is the possible error 
source. Try different options for `-mscrtlib=libname` switch.

What do you mean by not running? Does it return an error code? 
(please start it in some debugger)
May 26 2022