warnings for make LLVM=1 allyesconfig kselftest

kselftest-allyesconfig-with-LLVM=1

Package alsa was not found in the pkg-config search path.
Perhaps you should add the directory containing `alsa.pc'
to the PKG_CONFIG_PATH environment variable
Package 'alsa', required by 'virtual:world', not found
In file included from progs/hid.c:6:
progs/hid_bpf_helpers.h:9:38: error: declaration of 'struct hid_bpf_ctx' will not be visible outside of this function [-Werror,-Wvisibility]
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                      ^
progs/hid_bpf_helpers.h:18:15: error: declaration of 'enum hid_report_type' will not be visible outside of this function [-Werror,-Wvisibility]
   18 |                               enum hid_report_type type,
      |                                    ^
progs/hid_bpf_helpers.h:19:15: error: declaration of 'enum hid_class_request' will not be visible outside of this function [-Werror,-Wvisibility]
   19 |                               enum hid_class_request reqtype) __ksym;
      |                                    ^
progs/hid.c:23:35: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
   23 |         __u8 *rw_data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 3 /* size */);
      |                                          ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:32:16: error: incomplete definition of type 'struct hid_bpf_ctx'
   32 |         return hid_ctx->size;
      |                ~~~~~~~^
progs/hid_bpf_helpers.h:13:15: note: forward declaration of 'struct hid_bpf_ctx'
   13 | extern struct hid_bpf_ctx *hid_bpf_allocate_context(unsigned int hid_id) __ksym;
      |               ^
progs/hid.c:38:35: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
   38 |         __u8 *rw_data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */);
      |                                          ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:45:16: error: incomplete definition of type 'struct hid_bpf_ctx'
   45 |         return hid_ctx->size;
      |                ~~~~~~~^
progs/hid_bpf_helpers.h:13:15: note: forward declaration of 'struct hid_bpf_ctx'
   13 | extern struct hid_bpf_ctx *hid_bpf_allocate_context(unsigned int hid_id) __ksym;
      |               ^
progs/hid.c:51:35: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
   51 |         __u8 *rw_data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 3 /* size */);
      |                                          ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:66:27: error: use of undeclared identifier 'HID_BPF_FLAG_INSERT_HEAD'
   66 |                                           ctx->insert_head ? HID_BPF_FLAG_INSERT_HEAD :
      |                                                              ^
progs/hid.c:67:13: error: use of undeclared identifier 'HID_BPF_FLAG_NONE'
   67 |                                                              HID_BPF_FLAG_NONE);
      |                                                              ^
progs/hid.c:77:23: error: field has incomplete type 'enum hid_report_type'
   77 |         enum hid_report_type type;
      |                              ^
progs/hid.c:77:7: note: forward declaration of 'enum hid_report_type'
   77 |         enum hid_report_type type;
      |              ^
progs/hid.c:144:32: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
  144 |         __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4096 /* size */);
      |                                       ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:163:32: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
  163 |         __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */);
      |                                       ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:180:32: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
  180 |         __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */);
      |                                       ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
progs/hid.c:197:32: error: incompatible pointer types passing 'struct hid_bpf_ctx *' to parameter of type 'struct hid_bpf_ctx *' [-Werror,-Wincompatible-pointer-types]
  197 |         __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */);
      |                                       ^~~~~~~
progs/hid_bpf_helpers.h:9:51: note: passing argument to parameter 'ctx' here
    9 | extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
      |                                                   ^
15 errors generated.
make[1]: *** [Makefile:227: /usr/local/google/home/justinstitt/playground/learning-to-build/linux/builds/kselftest-000/kselftest/hid/hid.bpf.o] Error 1
x86_64/amx_test.c:224:6: warning: variable 'stage' set but not used [-Wunused-but-set-variable]
  224 |         int stage, ret;
      |             ^
1 warning generated.
Makefile:14: warning: overriding recipe for target 'clean'
../lib.mk:160: warning: ignoring old recipe for target 'clean'

Note: I manually removed the following warning which appeared 60+ times:
../lib.mk:25: *** Specify CROSS_COMPILE or add '--target=' option to lib.mk. Stop.