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Error while using steam_api.h on Linux/OSX


Whenever i try to include the steam_api.h on Linux(or OSX) i get this error that:

ARRAY_COUNT is already defined in UnrealTemplate.h

Any workaround or fix for this issue?I Need to use the steam_api header file to use SteamTypes.


Product Version: UE 4.13 Preview
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asked Aug 22 '16 at 10:51 AM in C++ Programming

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avatar image TX_Alpha Aug 30 '16 at 02:24 PM

Do you have

 #pragma once

above your #includes?

avatar image iSpakkio Aug 31 '16 at 11:51 AM

Yes i do, do you think removing it would fix the issue?

(ATM i have no Linux installation on my PC)

avatar image TX_Alpha Aug 31 '16 at 01:50 PM

Definitely do NOT remove it.

I've done no work on Unix platforms, so I've got no other advice at the moment, but am interested in a response myself.

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1 answer: sort voted first

Here's a workaround : NOTE : you will need the full engine source code

1 - go into \Engine\Source\Programs\UnrealBuildTool and then Linux/LinuxToolChain.cs

in line 303 remove the flag -Werror (this will not treat warnings as errors)

2 - for OSX go into the Mac folder and then MacToolChain.cs

line 123 do the same thing (remove -Werror flag)

now instead of an error i get a warning which should at least make the code compile warning:

 steamtypes.h(98,9): warning : 'ARRAY_COUNT' macro redefined [-Wmacro-redefined]
 3>  #define ARRAY_COUNT(COUNTER) CLANG_ATTR( "array_count:" #COUNTER ";" )
 3>          ^
 3>  Runtime/Core/Public/Templates\UnrealTemplate.h(98,9) :  note: previous definition is here
 3>  #define ARRAY_COUNT( array ) (sizeof(ArrayCountHelper(array))+0)
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answered Sep 04 '16 at 08:04 AM

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avatar image VSZ Mar 29 '17 at 03:25 PM

Thanks a lot for sharing this. Not sure how many hours I would have spent tracking this down, you've really saved me some time :)

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