[android-common:android15-6.6 13711/13775] Makefile:1012: *** "Enabling Rust and CFI silently changes the KMI.". Stop.

[android-common:android15-6.6 13711/13775] Makefile:1012: *** "Enabling Rust and CFI silently changes the KMI.". Stop.

[kernel test robot]

:::::: 
:::::: Manual check reason: "only Makefile file changed"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: cros-kernel-buildreports@googlegroups.com

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   c7b8a41d0f4f3bcecca0ce69965792c0fad27835
commit: 691810c3b9c0c8567ce2f409048b5db2d8890af5 [13711/13775] ANDROID: Makefile: Fail the build if RUST and CFI are both enabled
:::::: branch date: 7 hours ago
:::::: commit date: 7 days ago
config: x86_64-randconfig-123-20240710 (https://download.01.org/0day-ci/archive/20240710/202407101315.jpMVTUp9-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240710/202407101315.jpMVTUp9-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202407101315.jpMVTUp9-lkp@intel.com/

All errors (new ones prefixed by >>):

>> Makefile:1012: *** "Enabling Rust and CFI silently changes the KMI.".  Stop.
   make[1]: *** [Makefile:252: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:252: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for DRM_MIPI_DSI
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK
   Depends on [n]: SOUND [=y] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_VMASTER
   Depends on [n]: SOUND [=y] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for CAN_RX_OFFLOAD
   Depends on [n]: NETDEVICES [=y] && CAN_DEV [=n] && CAN_NETLINK [=n]
   Selected by [y]:
   - GKI_HIDDEN_MCP251XFD_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_IEC958
   Depends on [n]: SOUND [=y] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_SOC_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK_INPUT_DEV
   Depends on [n]: SOUND [=y] && SND [=n] && SND_JACK [=y]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_ELD
   Depends on [n]: SOUND [=y] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_INTEL_NHLT
   Depends on [n]: SOUND [=y] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y] && ACPI [=y]


vim +1012 Makefile

dc5723b02e523b Sami Tolvanen  2020-12-11  1003  
cf68fffb66d60d Sami Tolvanen  2021-04-08  1004  ifdef CONFIG_CFI_CLANG
89245600941e4e Sami Tolvanen  2022-09-08  1005  CC_FLAGS_CFI   := -fsanitize=kcfi
37e90c8aef834f Matthew Maurer 2023-09-15  1006  ifdef CONFIG_RUST
37e90c8aef834f Matthew Maurer 2023-09-15  1007  # If Rust is enabled, this flag is required to support cross-language
37e90c8aef834f Matthew Maurer 2023-09-15  1008  # integer types.
37e90c8aef834f Matthew Maurer 2023-09-15  1009  # This addresses the problem that on e.g. i686, int != long, and Rust
37e90c8aef834f Matthew Maurer 2023-09-15  1010  # maps both to i32.
37e90c8aef834f Matthew Maurer 2023-09-15  1011  # See https://rcvalle.com/docs/rust-cfi-design-doc.pdf for details.
691810c3b9c0c8 Will Deacon    2024-07-03 @1012  $(error "Enabling Rust and CFI silently changes the KMI.")
37e90c8aef834f Matthew Maurer 2023-09-15  1013  CC_FLAGS_CFI   += -fsanitize-cfi-icall-experimental-normalize-integers
37e90c8aef834f Matthew Maurer 2023-09-15  1014  RS_FLAGS_CFI   := -Zsanitizer=kcfi -Zsanitizer-cfi-normalize-integers
37e90c8aef834f Matthew Maurer 2023-09-15  1015  KBUILD_RUSTFLAGS += $(RS_FLAGS_CFI)
37e90c8aef834f Matthew Maurer 2023-09-15  1016  export RS_FLAGS_CFI
37e90c8aef834f Matthew Maurer 2023-09-15  1017  endif
cf68fffb66d60d Sami Tolvanen  2021-04-08  1018  KBUILD_CFLAGS  += $(CC_FLAGS_CFI)
cf68fffb66d60d Sami Tolvanen  2021-04-08  1019  export CC_FLAGS_CFI
cf68fffb66d60d Sami Tolvanen  2021-04-08  1020  endif
cf68fffb66d60d Sami Tolvanen  2021-04-08  1021  

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