can't open /dev/null.su for writing: Permission denied

[fuzhen011]

Information

VIM version

VIM - Vi IMproved 8.2 (2019 Dec 12, compiled May 26 2020 06:16:44)

MacOS Catalina 10.15.5

What went wrong

When I use vim to open some source or header files in the project, it shows me "can't open /dev/null.su for writing: Permission denied" error on the first line of the file.

:ALEInfo

Current Filetype: c
Available Linters: ['ccls', 'clang', 'clangd', 'clangtidy', 'cppcheck', 'cquery', 'flawfinder', 'gcc']
Enabled Linters: ['clangd', 'gcc']
Suggested Fixers:
'clang-format' - Fix C/C++ and cuda files with clang-format.
'clangtidy' - Fix C/C++ and ObjectiveC files with clang-tidy.
'remove_trailing_lines' - Remove all blank lines at the end of a file.
'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
'uncrustify' - Fix C, C++, C#, ObjectiveC, ObjectiveC++, D, Java, Pawn, and VALA files with uncrustify.
Linter Variables:

let g:ale_c_build_dir = ''
let g:ale_c_build_dir_names = ['build', 'GNU ARM v7.2.1 - Default']
let g:ale_c_clangd_executable = 'clangd'
let g:ale_c_clangd_options = ''
let g:ale_c_gcc_executable = 'arm-none-eabi-gcc'
let g:ale_c_gcc_options = '-mcpu=cortex-m3 -std=gnu11 -g3 -DUSE_HAL_DRIVER -DSTM32F103xB -DDEBUG -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/CMSIS/Device/ST/STM32F1xx/Include -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/CMSIS/Include -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Core/Inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/STM32F1xx_HAL_Driver/Inc/Legacy -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/STM32F1xx_HAL_Driver/Inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/src -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/src/log_module -Wall --specs=nano.specs -mfloat-abi=soft -mthumb'
let g:ale_c_parse_compile_commands = 1
let g:ale_c_parse_makefile = 0
let g:ale_c_uncrustify_options = '-c ~/.uncrustify.cfg -l C --replace'
Global Variables:

let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = 0
let g:ale_command_wrapper = ''
let g:ale_completion_delay = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = '%code: %%s'
let g:ale_echo_msg_info_str = 'Info'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 0
let g:ale_fixers = {'vim': ['trim_whitespace'], 'cmake': ['cmakeformat', 'trim_whitespace'], 'c': ['uncrustify', 'trim_whitespace'], 'xml': ['xmllint', 'trim_whitespace'], 'json': ['prettier', 'trim_whitespace'], 'sh': ['shfmt', 'trim_whitespace'], '*': ['remove_trailing_lines'], 'cpp': ['uncrustify', 'trim_whitespace'], 'markdown': ['prettier'], 'python': ['autopep8', 'isort', 'trim_whitespace']}
let g:ale_history_enabled = 1
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_insert_leave = 1
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 1
let g:ale_linter_aliases = {}
let g:ale_linters = {'c': ['gcc', 'clangd'], 'cpp': ['gcc', 'clangd'], 'python': ['pylint']}
let g:ale_linters_explicit = 0
let g:ale_list_vertical = 0
let g:ale_list_window_size = 10
let g:ale_loclist_msg_format = '%code: %%s'
let g:ale_lsp_root = {}
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = -1
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 0
let g:ale_pattern_options = v:null
let g:ale_pattern_options_enabled = v:null
let g:ale_set_balloons = 0
let g:ale_set_highlights = 0
let g:ale_set_loclist = 1
let g:ale_set_quickfix = 0
let g:ale_set_signs = 1
let g:ale_sign_column_always = 1
let g:ale_sign_error = 'E'
let g:ale_sign_info = 'W'
let g:ale_sign_offset = 1000000
let g:ale_sign_style_error = 'E'
let g:ale_sign_style_warning = 'W'
let g:ale_sign_warning = 'W'
let g:ale_sign_highlight_linenrs = 0
let g:ale_statusline_format = ['✗ %d', '⚡ %d', '✔ OK']
let g:ale_type_map = {}
let g:ale_use_global_executables = v:null
let g:ale_virtualtext_cursor = 0
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1
Command History:

(executable check - failure) clangd
(finished - exit code 1) ['/bin/zsh', '-c', '''arm-none-eabi-gcc'' -S -x c -o /dev/null -iquote ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/src'' -mcpu=cortex-m3 -std=gnu11 -DSTM32F10X_MD -DUSE_HAL_DRIVER -DSTM32F103xB -DDEBUG -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../inc'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../src/log_module'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../Drivers/CMSIS/Device/ST/STM32F1xx/Include'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../Drivers/CMSIS/Include'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../Core/Inc'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../Drivers/STM32F1xx_HAL_Driver/Inc/Legacy'' -I ''/Users/zhfu/STM32CubeIDE/workspace_1.3.0/version_second/Debug/../Drivers/STM32F1xx_HAL_Driver/Inc'' -O0 -ffunction-sections -fdata-sections -Wall -fstack-usage -mfloat-abi=soft -mthumb -mcpu=cortex-m3 -std=gnu11 -g3 -DUSE_HAL_DRIVER -DSTM32F103xB -DDEBUG -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/CMSIS/Device/ST/STM32F1xx/Include -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/CMSIS/Include -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Core/Inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/STM32F1xx_HAL_Driver/Inc/Legacy -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/Drivers/STM32F1xx_HAL_Driver/Inc -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/src -I$HOME/STM32CubeIDE/workspace_1.3.0/versoin_second/src/log_module -Wall --specs=nano.specs -mfloat-abi=soft -mthumb - < ''/var/folders/99/0wv0ssm1261890_flt8mq35x543lc3/T/vkdbLYS/3/store.c''']

<<>>
:1:0: fatal error: can't open /dev/null.su for writing: Permission denied
compilation terminated.
<<>>

[fuzhen011]

Digging it a little bit and found this is caused by the command option "-fstack-usage", in GCC document page, we can see below description to the option.

Makes the compiler output stack usage information for the program, on a per-function basis. The filename for the dump is made by appending .su to the auxname. auxname is generated from the name of the output file, if explicitly specified and it is not an executable, otherwise it is the basename of the source file.

[w0rp]

Almost all C/C++ issues with flags should now be discussed in #3276, so a comprehensive solution can be found for most people, for automatically detecting flags.

[w0rp]

@fuzhen011 I've pushed a fix for this issue now. -fstack-usage is now removed from parsed C flags.