[BUG] Make fails to build on CachyOS (clang) #363
Description
Problem Description
Self build from github, make fails to build.
Both lenovolegionlinux and lenovolegionlinux-git package fails to build the actual module silently.
Paru fails to build the actual module silently.
Model and Debug Info
Installation type: github, cachyos package. aur git package.
Distribution: CachyOS (Latest as of now)
Model name: Lenovo Legion 5 Pro 16IAH7H
CPU model: 12th Gen Intel(R) Core(TM) i7-12700H (20) @ 4.70 z
GPU model: NVIDIA GeForce RTX 3070 Mobile / Max-Q [Discrete]
GPU model: Intel Iris Xe Graphics @ 1.40 GHz [Integrated]
Keyboard backlight: I don't care
Light in lid or logo: Yes
Light at IO-Ports at back: Yes
This is the log for manual build from github (because the package fails silently):
~/LenovoLegionLinux/kernel_module heads/main
❯ make
make -C /lib/modules/6.17.6-2-cachyos/build M=/home/username/LenovoLegionLinux/kernel_module modules
make[1]: Entering directory '/usr/lib/modules/6.17.6-2-cachyos/build'
make[2]: Entering directory '/home/username/LenovoLegionLinux/kernel_module'
warning: the compiler differs from the one used to build the kernel
The kernel was built by: clang version 21.1.4
You are using: gcc (GCC) 15.2.1 20250813
CC [M] legion-laptop.o
gcc: error: unrecognized command-line option ‘-mretpoline-external-thunk’
gcc: error: unrecognized command-line option ‘-fsplit-lto-unit’
make[4]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/scripts/Makefile.build:287: legion-laptop.o] Error 1
make[3]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/Makefile:2016: .] Error 2
make[2]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/Makefile:248: __sub-make] Error 2
make[2]: Leaving directory '/home/username/LenovoLegionLinux/kernel_module'
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/usr/lib/modules/6.17.6-2-cachyos/build'
make: *** [Makefile:13: all] Error 2
Tried forcing clang
~/LenovoLegionLinux/kernel_module heads/main
❯ make CC=clang
make -C /lib/modules/6.17.6-2-cachyos/build M=/home/username/LenovoLegionLinux/kernel_module modules
make[1]: Entering directory '/usr/lib/modules/6.17.6-2-cachyos/build'
make[2]: Entering directory '/home/username/LenovoLegionLinux/kernel_module'
CC [M] legion-laptop.o
legion-laptop.c:5047:6: warning: unused variable 'err' [-Wunused-variable]
5047 | int err;
| ^~~
legion-laptop.c:5926:6: warning: variable 'err' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
5926 | if (!priv->adev) {
| ^~~~~~~~~~~
legion-laptop.c:5952:9: note: uninitialized use occurs here
5952 | return err;
| ^~~
legion-laptop.c:5926:2: note: remove the 'if' if its condition is always false
5926 | if (!priv->adev) {
| ^~~~~~~~~~~~~~~~~~
5927 | dev_info(dev, "Could not get ACPI handle\n");
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5928 | goto err_acpi_init;
| ~~~~~~~~~~~~~~~~~~~
5929 | }
| ~
legion-laptop.c:5920:9: note: initialize the variable 'err' to silence this warning
5920 | int err;
| ^
| = 0
legion-laptop.c:1856:16: warning: unused function 'ecram_memoryio_write' [-Wunused-function]
1856 | static ssize_t ecram_memoryio_write(const struct ecram_memoryio *ec_memoryio,
| ^~~~~~~~~~~~~~~~~~~~
3 warnings generated.
ld: unrecognised emulation mode: llvm
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu i386pep i386pe elf64bpf
make[4]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/scripts/Makefile.build:287: legion-laptop.o] Error 1
make[4]: *** Deleting file 'legion-laptop.o'
make[3]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/Makefile:2016: .] Error 2
make[2]: *** [/usr/lib/modules/6.17.6-2-cachyos/build/Makefile:248: __sub-make] Error 2
make[2]: Leaving directory '/home/username/LenovoLegionLinux/kernel_module'
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/usr/lib/modules/6.17.6-2-cachyos/build'
make: *** [Makefile:13: all] Error 2