Compiling on 32-bit GNU/Linux chokes on asm

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stdh
Posts: 4
Joined: Mon May 22, 2017 1:47 pm

Compiling on 32-bit GNU/Linux chokes on asm

Post by stdh »

As I posted in the 3.0.1 release thread, but it happens with 3.1.0 as well: if I try to compile on my old i386 laptop with Debian testing, with GCC 6.3.0 (SVN 20170425), I get the following error:

Code: Select all

gzdoom-g3.1.0/build$ cmake .. -DCMAKE_BUILD_TYPE=Release
 [snip]
gzdoom-g3.1.0/build$ make
 [snip]
[ 67%] Building CXX object src/CMakeFiles/zdoom.dir/g_statusbar/sbar_mugshot.cpp.o
[ 67%] Building CXX object src/CMakeFiles/zdoom.dir/g_statusbar/shared_sbar.cpp.o
In file included from gzdoom-g3.1.0/src/./m_bbox.h:32:0,
                 from gzdoom-g3.1.0/src/./r_defs.h:35,
                 from gzdoom-g3.1.0/src/./v_collection.h:38,
                 from gzdoom-g3.1.0/src/g_statusbar/sbar.h:39,
                 from gzdoom-g3.1.0/src/g_statusbar/shared_sbar.cpp:39:
gzdoom-g3.1.0/src/./m_fixed.h: In function ‘void DBaseStatusBar::DrawCrosshair()’:
gzdoom-g3.1.0/src/./m_fixed.h:29:5: error: ‘asm’ operand has impossible constraints
    );
     ^
src/CMakeFiles/zdoom.dir/build.make:5268: recipe for target 'src/CMakeFiles/zdoom.dir/g_statusbar/shared_sbar.cpp.o' failed
make[2]: *** [src/CMakeFiles/zdoom.dir/g_statusbar/shared_sbar.cpp.o] Error 1
CMakeFiles/Makefile2:788: recipe for target 'src/CMakeFiles/zdoom.dir/all' failed
make[1]: *** [src/CMakeFiles/zdoom.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
Since I read someplace that such asm errors may be related to optimization, I tried a Debug build and that just works.
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_mental_
 
 
Posts: 3812
Joined: Sun Aug 07, 2011 4:32 am

Re: Compiling on 32-bit GNU/Linux chokes on asm

Post by _mental_ »

Could you please try to change line 28 of src/m_fixed.h from : "cc" to : "%cc", i.e. to add a percent character?
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stdh
Posts: 4
Joined: Mon May 22, 2017 1:47 pm

Re: Compiling on 32-bit GNU/Linux chokes on asm

Post by stdh »

Hi _mental_, unfortunately that doesn't solve it, I get the exact same error. Not sure if it's got anything to do with this, but I noticed some fails in cmake's output. Note that ccache is not the culprit, I tried without it in a clean build directory and the results were the same.
Spoiler: cmake output
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_mental_
 
 
Posts: 3812
Joined: Sun Aug 07, 2011 4:32 am

Re: Compiling on 32-bit GNU/Linux chokes on asm

Post by _mental_ »

Unfortunately there is nothing I can do with this. It seems to be a bug within GCC 6 from Debian Testing.

I checked with the following versions of GCC 6 from Debian Stretch RC4, Ubuntu 17.04 and Mint 18.1 (all 32-bit):

Code: Select all

g++ (Debian 6.3.0-18) 6.3.0 20170516
g++ (Ubuntu 6.3.0-12ubuntu2) 6.3.0 20170406
g++-6 (Ubuntu/Linaro 6.3.0-18ubuntu2~16.04) 6.3.0 20170519
Only Debian's GCC 6 has the mentioned compilation problem.
Moreover, GCC 4.9, 5.4 and 7.1 on the same Debian built Release configuration successfully.

I suggest to install other version of GCC or use Clang to build GZDoom.
Alternatively you can comment or remove these lines to be able to build with GCC 6.
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