It appears that you're using the wrong glslangValidator syntax. DXVK does not compile.

Error:

FAILED: src/dxvk/dxvk@sta/dxvk_clear_image2d_u.h
'/usr/bin/glslangValidator' '-V' '--vn' '@BASENAME@' '../../dxvk-legacy/src/dxvk/shaders/dxvk_clear_image2d_u.comp' '-o' 'src/dxvk/dxvk@sta/dxvk_clear_image2d_u.h'

Usage: glslangValidator [option]... [file]...

Where: each 'file' ends in ., where is one of
.conf to provide an optional config file that replaces the default configuration

(see -c option below for generating a template)
.vert   for a vertex shader
.tesc   for a tessellation control shader
.tese   for a tessellation evaluation shader
.geom   for a geometry shader
.frag   for a fragment shader
.comp   for a compute shader

Compilation warnings and errors will be printed to stdout.

To get other information, use one of the following options:
Each option must be specified separately.
-V create SPIR-V binary, under Vulkan semantics; turns on -l;
default file name is .spv (-o overrides this)
(unless -o is specified, which overrides the default file name)
-G create SPIR-V binary, under OpenGL semantics; turns on -l;
default file name is .spv (-o overrides this)
-H print human readable form of SPIR-V; turns on -V
-E print pre-processed GLSL; cannot be used with -l;
errors will appear on stderr.
-c configuration dump;
creates the default configuration file (redirect to a .conf file)
-d default to desktop (#version 110) when there is no shader #version
(default is ES version 100)
-D input is HLSL
-e specify entry-point name
-h print this usage message
-i intermediate tree (glslang AST) is printed out
-l link all input files together to form a single module
-m memory leak mode
-o save binary into , requires a binary option (e.g., -V)
-q dump reflection query database
-r relaxed semantic error-checking mode
-s silent mode
-t multi-threaded mode
-v print version strings
-w suppress warnings (except as required by #extension : warn)