Build fails on GCC 10

[player-03]

GCC 10 contains a breaking change: it defaults to -fno-common, which requires globals to be declared in exactly one C file, and referenced elsewhere with extern. [...] This could be fixed by declaring globals in exactly one place as noted above, or by explicitly passing -fcommon to gcc.

-Issue description on openal-soft

In Lime, this produces an error message when running lime rubuild:

/usr/bin/ld: obj/linux64/0fd0c071_panning.o:(.rodata+0x13a0): multiple definition of `FuMa2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xea0): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_panning.o:(.rodata+0x13e0): multiple definition of `SN3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xee0): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_panning.o:(.rodata+0x1420): multiple definition of `N3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xf20): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_ALu.o:(.rodata+0x3bfa0): multiple definition of `FuMa2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xea0): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_ALu.o:(.rodata+0x3bfe0): multiple definition of `SN3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xee0): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_ALu.o:(.rodata+0x3c020): multiple definition of `N3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xf20): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_bformatdec.o:(.rodata+0x300): multiple definition of `SN3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xee0): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_bformatdec.o:(.rodata+0x340): multiple definition of `N3D2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xf20): first defined here
/usr/bin/ld: obj/linux64/0fd0c071_bformatdec.o:(.rodata+0x2c0): multiple definition of `FuMa2N3DScale'; obj/linux64/0fd0c071_ALc.o:(.rodata+0xea0): first defined here
collect2: error: ld returned 1 exit status

Oddly, passing -fcommon to the linker doesn't work, and that's a backwards solution anyway. Instead, we should use openal-soft's fix, as implemented in 20f5e7c.

[player-03]

Update: you aren't supposed to pass -fcommon to the linker. You need to pass it when compiling the .o files. I've submitted the workaround, but updating is still preferable in the long run.

[ccpplinux]

Thanks for giving me hint. After adding -fcommon flag when I executed then command lime rebuild linux -64 -release -clean then it executed successfully. However when I executed the command lime rebuild tools then following error messages were displayed:

../src/lime/math/ColorMatrix.hx:117: characters 12-17 : lime.math.ColorMatrix should be Null<lime.utils.ArrayBufferView>
../src/lime/math/ColorMatrix.hx:117: characters 12-17 : ... For optional function argument 'view'
../src/lime/_internal/backend/native/NativeWindow.hx:143: characters 5-23 : lime._internal.backend.native.NativeOpenGLRenderContext should be lime.graphics.OpenGLES2RenderContext
../src/lime/_internal/backend/native/NativeWindow.hx:144: characters 5-23 : lime._internal.backend.native.NativeOpenGLRenderContext should be lime.graphics.WebGLRenderContext
../src/lime/_internal/backend/native/NativeWindow.hx:150: characters 6-24 : lime._internal.backend.native.NativeOpenGLRenderContext should be lime.graphics.OpenGLES3RenderContext
../src/lime/_internal/backend/native/NativeWindow.hx:151: characters 6-25 : lime._internal.backend.native.NativeOpenGLRenderContext should be lime.graphics.WebGL2RenderContext
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1810: characters 22-28 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1810: characters 22-28 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1815: characters 22-28 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1815: characters 22-28 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1831: characters 24-30 : lime.utils.UInt32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1831: characters 24-30 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1836: characters 24-30 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1836: characters 24-30 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1841: characters 24-30 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:1841: characters 24-30 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:2313: characters 36-42 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:2313: characters 36-42 : ... For function argument 'params'
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:2319: characters 36-42 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/_internal/backend/native/NativeOpenGLRenderContext.hx:2319: characters 36-42 : ... For function argument 'params'
../src/lime/graphics/WebGL2RenderContext.hx:4617: characters 63-64 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4617: characters 63-64 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4631: characters 64-65 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4631: characters 64-65 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4639: characters 66-67 : lime.utils.UInt32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4639: characters 66-67 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4655: characters 70-71 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4655: characters 70-71 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4669: characters 71-72 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4669: characters 71-72 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4678: characters 73-74 : lime.utils.UInt32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4678: characters 73-74 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4696: characters 80-81 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4696: characters 80-81 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4712: characters 81-82 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4712: characters 81-82 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4721: characters 83-84 : lime.utils.UInt32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4721: characters 83-84 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4740: characters 74-75 : lime.utils.Float32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4740: characters 74-75 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4757: characters 75-76 : lime.utils.Int32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4757: characters 75-76 : ... For function argument 'v'
../src/lime/graphics/WebGL2RenderContext.hx:4767: characters 77-78 : lime.utils.UInt32Array should be lime.utils.DataPointer
../src/lime/graphics/WebGL2RenderContext.hx:4767: characters 77-78 : ... For function argument 'v'
../src/lime/media/openal/AL.hx:1307: characters 3-11 : Int should be lime.media.openal.ALBuffer
../src/lime/media/OpenALAudioContext.hx:573: characters 3-40 : lime.media.openal.ALBuffer should be Int
platforms/AndroidPlatform.hx:500: characters 19-51 : You can't iterate on a Dynamic value, please specify Iterator or Iterable

Can you please specify a solution for it?

[player-03]

Turns out the workaround was accepted on November 13 (see 9b3a80d). Closing this, but we can continue the discussion in openfl/lime#1493.

Edit: actually no, the opening post still describes a problem that needs solving. Let's leave it open.