Print compile/link logs to stderr #4138
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Currently, the glslang check is run every time ninja is invoked, even with an up-to-date build directory when GLSL shaders haven't been modified. This is due to glslang not creating any output file: the _check file never exists so ninja keeps trying to generate it by running the command. Unfortunately Meson doesn't support running commands with no outputs [1]. Create an empty output file to fix this by setting `capture: true`. This doesn't work out-of-the-box, because glslang prints messages to stdout, and provides no way to change this [2]. As a result, shader errors are not surfaced back to the user - they end up in the _check file. Workaround this with a thin wrapper which redirects stdout to stderr when invoking glslang. [1]: mesonbuild/meson#11506 [2]: KhronosGroup/glslang#4138
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This may be confusing tests expecting output on stdout, though. They will need to be adapted. I think you may find failures in the testsuite with this.
When glslang is integrated into a build system (like Meson), stdout is stored in an output file and stderr is printed to the user. This hides error messages from the user. See: mesonbuild/meson#11506 stderr is the standard stream errors should get printed to, always use that.
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Ah, I attempted a fix but it only fixed a few tests. Tried a more general fix in the last push. |
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When glslang is integrated into a build system (like Meson), stdout is stored in an output file and stderr is printed to the user. This hides error messages from the user. See: mesonbuild/meson#11506
stderr is the standard stream errors should get printed to, always use that.