anv: added proper handling for input argument in intel_clc

That was previously listed on the getopt_long struct but not actually
being used. This makes intel_clc argument processing easier as now
all of its arguments are handled with getopt and anything after the
special argument '--' is passed along to clang to form the final build
command.

Thanks to Dylan Baker for help with changes to the meson file.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19153>

src/intel/compiler/intel_clc.c

@@ -258,13 +258,14 @@ static void
 print_usage(char *exec_name, FILE *f)
 {
    fprintf(f,
-"Usage: %s [options] -- [clang args | input file]\n"
+"Usage: %s [options] -- [clang args]\n"
 "Options:\n"
 "  -h  --help              Print this help.\n"
 "  -e, --entrypoint <name> Specify the entry-point name.\n"
 "  -p, --platform <name>   Specify the target platform name.\n"
 "      --prefix <prefix>   Prefix for variable names in generated C code.\n"
 "  -o, --out <filename>    Specify the output filename.\n"
+"  -i, --in <filename>     Specify one input filename. Accepted multiple times.\n"
 "  -s, --spv <filename>    Specify the output filename for spirv.\n"
 "  -v, --verbose           Print more information during compilation.\n"
    , exec_name);
@@ -319,7 +320,7 @@ int main(int argc, char **argv)
    util_dynarray_init(&spirv_ptr_objs, mem_ctx);
 
    int ch;
-   while ((ch = getopt_long(argc, argv, "he:p:s:o:v", long_options, NULL)) != -1)
+   while ((ch = getopt_long(argc, argv, "he:p:s:i:o:v", long_options, NULL)) != -1)
    {
       switch (ch)
       {
@@ -335,6 +336,9 @@ int main(int argc, char **argv)
       case 'o':
          outfile = optarg;
          break;
+      case 'i':
+         util_dynarray_append(&input_files, char *, optarg);
+	 break;
       case 's':
          spv_outfile = optarg;
          break;
@@ -352,10 +356,7 @@ int main(int argc, char **argv)
    }
 
    for (int i = optind; i < argc; i++) {
-      if (argv[i][0] == '-')
+      util_dynarray_append(&clang_args, char *, argv[i]);
-         util_dynarray_append(&clang_args, char *, argv[i]);
-      else
-         util_dynarray_append(&input_files, char *, argv[i]);
    }
 
    if (util_dynarray_num_elements(&input_files, char *) == 0) {

src/intel/vulkan/grl/meson.build

@@ -122,6 +122,10 @@ foreach t : [['125', 'gfx125', 'dg2']]
         input_args += [ lib_file ]
       endforeach
     endif
+    prepended_input_args = []
+    foreach input_arg : input_args
+      prepended_input_args += ['--in', input_arg]
+    endforeach
     outfile = kernel_prefix + '.h'
     grl_compiled_cl_kernels += custom_target(
       outfile,
@@ -129,12 +133,12 @@ foreach t : [['125', 'gfx125', 'dg2']]
       output : outfile,
       command : [
         prog_intel_clc, '-p', platform, '--prefix', kernel_prefix,
-        '-e', entrypoint, input_args, '-o', '@OUTPUT@', '--',
+        '-e', entrypoint, prepended_input_args, '-o', '@OUTPUT@', '--',
         '-cl-std=cl2.0', '-D__OPENCL_VERSION__=200',
         '-DMAX_HW_SIMD_WIDTH=16', '-DMAX_WORKGROUP_SIZE=16',
         '-I' + join_paths(meson.current_source_dir(), 'gpu'),
         '-I' + join_paths(meson.current_source_dir(), 'include'),
-        '-include' + 'opencl-c.h', # added to bypass build failure from clang15
+        '-include', 'opencl-c.h', # added to bypass build failure from clang15
                                    # without modifying grl source code, remove
                                    # if fixed there
       ],