freestanding_module_import_2 assembly failure on ARM64

[davidebeatrici]

Describe the bug

DEBUG:  FAIL  [2210/2214] C:  3191.9 ms, R: 58072.836 ms vlib/v/gen/c/coutput_test.v
DEBUG: > testing whether .out files match:
DEBUG: OK   C:  2812ms, R:35ms v run vlib/v/gen/c/testdata/volatile.vv == vlib/v/gen/c/testdata/volatile.out 
DEBUG: OK   C:  4176ms, R:29ms v -d ddd1=true -d ddd2=false run vlib/v/gen/c/testdata/use_flag_comptime_with_if.vv == vlib/v/gen/c/testdata/use_flag_comptime_with_if.out 
DEBUG: OK   C:  4834ms, R:19ms v -d my_f64=2.0 -d my_i64=3 -d my_string="a four" -d my_bool -d my_char=g -d my_size=8 -d field_fsa_size=16 run vlib/v/gen/c/testdata/use_flag_comptime_values.vv == vlib/v/gen/c/testdata/use_flag_comptime_values.out 
DEBUG: OK   C:  4229ms, R:35ms v run vlib/v/gen/c/testdata/translated_module.vv == vlib/v/gen/c/testdata/translated_module.out 
DEBUG: OK   C:  2464ms, R:19ms v -translated run vlib/v/gen/c/testdata/translated_const_fixed_array.vv == vlib/v/gen/c/testdata/translated_const_fixed_array.out 
DEBUG: OK   C:  1980ms, R:38ms v run vlib/v/gen/c/testdata/sumtype_struct_depend_order.vv == vlib/v/gen/c/testdata/sumtype_struct_depend_order.out 
DEBUG: OK   C:  3118ms, R:12ms v run vlib/v/gen/c/testdata/sumtype_pass_by_reference.vv == vlib/v/gen/c/testdata/sumtype_pass_by_reference.out 
DEBUG: OK   C:  2375ms, R:21ms v run vlib/v/gen/c/testdata/struct_fn_member_print.vv == vlib/v/gen/c/testdata/struct_fn_member_print.out 
DEBUG: OK   C:  2850ms, R:12ms v run vlib/v/gen/c/testdata/struct_field_free.vv == vlib/v/gen/c/testdata/struct_field_free.out 
DEBUG: OK   C:  1963ms, R:16ms v run vlib/v/gen/c/testdata/strlit_len_optimization.vv == vlib/v/gen/c/testdata/strlit_len_optimization.out 
DEBUG: > skipping vlib/v/gen/c/testdata/spawn_stack_windows.vv on !windows
DEBUG: OK   C:  2112ms, R:32ms v run vlib/v/gen/c/testdata/spawn_stack_nix.vv == vlib/v/gen/c/testdata/spawn_stack_nix.out 
DEBUG: OK   C:  1832ms, R:59ms v run vlib/v/gen/c/testdata/spawn_call_fn_struct_field.vv == vlib/v/gen/c/testdata/spawn_call_fn_struct_field.out 
DEBUG: OK   C: 11312ms, R: 8ms v -prod -skip-unused run vlib/v/gen/c/testdata/self_printer_with_prod.vv == vlib/v/gen/c/testdata/self_printer_with_prod.out 
DEBUG: OK   C:   982ms, R: 7ms v run vlib/v/gen/c/testdata/ref_sumtype_map_as_struct_field.vv == vlib/v/gen/c/testdata/ref_sumtype_map_as_struct_field.out 
DEBUG: OK   C:   871ms, R: 6ms v run vlib/v/gen/c/testdata/preinclude_example_changed_order.vv == vlib/v/gen/c/testdata/preinclude_example_changed_order.out 
DEBUG: OK   C:  1306ms, R: 7ms v run vlib/v/gen/c/testdata/preinclude_example.vv == vlib/v/gen/c/testdata/preinclude_example.out 
DEBUG: OK   C:  1403ms, R: 7ms v run vlib/v/gen/c/testdata/platform_wrapper_non_emscripten.vv == vlib/v/gen/c/testdata/platform_wrapper_non_emscripten.out 
DEBUG: OK   C:   710ms, R: 6ms v run vlib/v/gen/c/testdata/none_literal_str.vv == vlib/v/gen/c/testdata/none_literal_str.out 
DEBUG: OK   C:   751ms, R: 7ms v run vlib/v/gen/c/testdata/mutable_receiver_type_mapping.vv == vlib/v/gen/c/testdata/mutable_receiver_type_mapping.out 
DEBUG: OK   C:   740ms, R: 6ms v run vlib/v/gen/c/testdata/multi_return_ignored_if_guard.vv == vlib/v/gen/c/testdata/multi_return_ignored_if_guard.out 
DEBUG: OK   C:   648ms, R: 6ms v -d not_defined run vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.vv == vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.out 
DEBUG: OK   C:   658ms, R: 6ms v -d init_on run vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.vv == vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.out 
DEBUG: OK   C:   710ms, R: 6ms v run vlib/v/gen/c/testdata/if_else_return.vv == vlib/v/gen/c/testdata/if_else_return.out 
DEBUG: OK   C:   668ms, R: 6ms v -d some_define run vlib/v/gen/c/testdata/if_define_check_set.vv == vlib/v/gen/c/testdata/if_define_check_set.out 
DEBUG: OK   C:   658ms, R: 6ms v -d some_define= run vlib/v/gen/c/testdata/if_define_check_not_set.vv == vlib/v/gen/c/testdata/if_define_check_not_set.out 
DEBUG: OK   C:   706ms, R: 6ms v run vlib/v/gen/c/testdata/gen_expr_to_string_with_call_and_return_ref.vv == vlib/v/gen/c/testdata/gen_expr_to_string_with_call_and_return_ref.out 
DEBUG: V panic: compilation failed: ================== C compilation error (from gcc): ==============
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c: In function ‘sys_call1’:
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c:6826:9: error: impossible constraint in ‘asm’
DEBUG: cc:  6826 |         __asm__ (
DEBUG: cc:       |         ^~~~~~~
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c: In function ‘sys_call2’:
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c:6836:9: warning: ‘asm’ operand 3 probably does not match constraints
DEBUG: cc:  6836 |         __asm__ (
DEBUG: cc:       |         ^~~~~~~
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c: In function ‘sys_call3’:
DEBUG: cc: /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/freestanding_module_import_2.exe.01JGQMFTHXFKW4ZQ759Z70Y9NV.tmp.c:6847:9: warning: ‘asm’ operand 3 probably does not match constraints
DEBUG: cc:  6847 |         __asm__ (
DEBUG: cc:       |         ^~~~~~~
DEBUG: ... (the original output was 24 lines long, and was truncated to 12 lines)
DEBUG: =================================================================
DEBUG: (You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
DEBUG: builder error: 
DEBUG: ==================
DEBUG: C error found. It should never happen, when compiling pure V code.
DEBUG: This is a V compiler bug, please report it using `v bug file.v`,
DEBUG: or goto https://github.com/vlang/v/issues/new/choose .
DEBUG: You can also use #help on Discord: https://discord.gg/vlang .
DEBUG: v hash: 3953445
DEBUG:                                                         | 0xaaaad4b7a5c4 | /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/511_11/coutput_test(+0x3a5c4) 
DEBUG:                                                         | 0xaaaad4b790c0 | /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/511_11/coutput_test(+0x390c0) 
DEBUG:                                                         | 0xaaaad4b7c2dc | /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/511_11/coutput_test(+0x3c2dc) 
DEBUG:                                                         | 0xffff8dcd0a94 | /lib64/libc.so.6(+0x30a94) 
DEBUG:                                                         | 0xffff8dcd0b78 | /lib64/libc.so.6(__libc_start_main+0x98) 
DEBUG:                                                         | 0xaaaad4b59030 | /tmp/v_192/tsession_ffff89a50020_01JGQMDK9D7GBF09KXZVM9C32W/511_11/coutput_test(+0x19030)

Reproduction Steps

v vlib/v/gen/c/coutput_test.v

Expected Behavior

The test to succeed.

Current Behavior

The test fails to build.

Possible Solution

No response

Additional Information/Context

Full log: https://file-store.openmandriva.org/api/v1/file_stores/32f80acbbdb28ac8e2d5eea7943d7efb4fcce010.log?show=true

V version

0.4.9

Environment details (OS name and version, etc.)

OpenMandriva on ARM64.

Note

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[JalonSolov]

I see this

$ v vlib/v/gen/c/coutput_test.v
> testing whether .out files match:
OK   C:    85ms, R: 1ms v run vlib/v/gen/c/testdata/mutable_receiver_type_mapping.vv == vlib/v/gen/c/testdata/mutable_receiver_type_mapping.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/c_varargs.vv == vlib/v/gen/c/testdata/c_varargs.out 
> skipping vlib/v/gen/c/testdata/spawn_stack_windows.vv on !windows
OK   C:    83ms, R: 1ms v -autofree run vlib/v/gen/c/testdata/assigning_and_printing_struct_with_optional_field.vv == vlib/v/gen/c/testdata/assigning_and_printing_struct_with_optional_field.out 
OK   C:    85ms, R: 1ms v run vlib/v/gen/c/testdata/preinclude_example_changed_order.vv == vlib/v/gen/c/testdata/preinclude_example_changed_order.out 
OK   C:  2213ms, R: 1ms v -prod -skip-unused run vlib/v/gen/c/testdata/self_printer_with_prod.vv == vlib/v/gen/c/testdata/self_printer_with_prod.out 
OK   C:    82ms, R: 1ms v -d some_define= run vlib/v/gen/c/testdata/if_define_check_not_set.vv == vlib/v/gen/c/testdata/if_define_check_not_set.out 
OK   C:  2506ms, R: 1ms v -prod -no-skip-unused run vlib/v/gen/c/testdata/embed_with_prod.vv == vlib/v/gen/c/testdata/embed_with_prod.out 
OK   C:    87ms, R: 1ms v -d my_f64=2.0 -d my_i64=3 -d my_string="a four" -d my_bool -d my_char=g -d my_size=8 -d field_fsa_size=16 run vlib/v/gen/c/testdata/use_flag_comptime_values.vv == vlib/v/gen/c/testdata/use_flag_comptime_values.out 
OK   C:    83ms, R: 1ms v -d some_define run vlib/v/gen/c/testdata/if_define_check_set.vv == vlib/v/gen/c/testdata/if_define_check_set.out 
OK   C:    86ms, R: 1ms v run vlib/v/gen/c/testdata/comptime_interface_field.vv == vlib/v/gen/c/testdata/comptime_interface_field.out 
OK   C:    89ms, R: 1ms v run vlib/v/gen/c/testdata/if_else_return.vv == vlib/v/gen/c/testdata/if_else_return.out 
OK   C:   315ms, R: 1ms v -cc gcc run vlib/v/gen/c/testdata/freestanding_module_import_1.vv == vlib/v/gen/c/testdata/freestanding_module_import_1.out 
OK   C:    81ms, R: 1ms v run vlib/v/gen/c/testdata/enum_switch_case.vv == vlib/v/gen/c/testdata/enum_switch_case.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/addr_from_range.vv == vlib/v/gen/c/testdata/addr_from_range.out 
> skipping vlib/v/gen/c/testdata/aligned_attr_gcc_windows.vv on !windows
OK   C:    84ms, R: 1ms v run vlib/v/gen/c/testdata/addition.vv == vlib/v/gen/c/testdata/addition.out 
OK   C:    88ms, R: 1ms v run vlib/v/gen/c/testdata/multi_return_ignored_if_guard.vv == vlib/v/gen/c/testdata/multi_return_ignored_if_guard.out 
OK   C:    91ms, R: 1ms v -d ddd1=true -d ddd2=false run vlib/v/gen/c/testdata/use_flag_comptime_with_if.vv == vlib/v/gen/c/testdata/use_flag_comptime_with_if.out 
OK   C:    89ms, R: 1ms v -g run vlib/v/gen/c/testdata/comptime_if_cond.vv == vlib/v/gen/c/testdata/comptime_if_cond.out 
OK   C:    83ms, R: 1ms v run vlib/v/gen/c/testdata/alias_c_parent_type_decl.vv == vlib/v/gen/c/testdata/alias_c_parent_type_decl.out 
OK   C:    88ms, R: 1ms v run vlib/v/gen/c/testdata/alias_of_array_method_call.vv == vlib/v/gen/c/testdata/alias_of_array_method_call.out 
OK   C:    90ms, R: 1ms v run vlib/v/gen/c/testdata/comptime_option_call.vv == vlib/v/gen/c/testdata/comptime_option_call.out 
OK   C:    83ms, R: 1ms v -d init_on run vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.vv == vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.out 
OK   C:    84ms, R: 1ms v -d not_defined run vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.vv == vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/struct_fn_member_print.vv == vlib/v/gen/c/testdata/struct_fn_member_print.out 
OK   C:    89ms, R: 2ms v run vlib/v/gen/c/testdata/spawn_stack_nix.vv == vlib/v/gen/c/testdata/spawn_stack_nix.out 
OK   C:    90ms, R: 1ms v run vlib/v/gen/c/testdata/attr_string_quotes_escape.vv == vlib/v/gen/c/testdata/attr_string_quotes_escape.out 
> skipping vlib/v/gen/c/testdata/aligned_attr_msvc_windows.vv on !windows
OK   C:   287ms, R: 0ms v -cc gcc -freestanding run vlib/v/gen/c/testdata/freestanding_module_import_2.vv == vlib/v/gen/c/testdata/freestanding_module_import_2.out 
OK   C:    90ms, R: 1ms v run vlib/v/gen/c/testdata/alias_interface_method_call.vv == vlib/v/gen/c/testdata/alias_interface_method_call.out 
OK   C:    88ms, R: 1ms v run vlib/v/gen/c/testdata/struct_field_free.vv == vlib/v/gen/c/testdata/struct_field_free.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/translated_module.vv == vlib/v/gen/c/testdata/translated_module.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/none_literal_str.vv == vlib/v/gen/c/testdata/none_literal_str.out 
OK   C:    82ms, R: 1ms v -translated run vlib/v/gen/c/testdata/translated_const_fixed_array.vv == vlib/v/gen/c/testdata/translated_const_fixed_array.out 
OK   C:    85ms, R: 1ms v run vlib/v/gen/c/testdata/sumtype_pass_by_reference.vv == vlib/v/gen/c/testdata/sumtype_pass_by_reference.out 
OK   C:    89ms, R: 1ms v run vlib/v/gen/c/testdata/preinclude_example.vv == vlib/v/gen/c/testdata/preinclude_example.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/assert_fncalls.vv == vlib/v/gen/c/testdata/assert_fncalls.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/for_in_side_effect.vv == vlib/v/gen/c/testdata/for_in_side_effect.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/array_init_no_error.vv == vlib/v/gen/c/testdata/array_init_no_error.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/strlit_len_optimization.vv == vlib/v/gen/c/testdata/strlit_len_optimization.out 
OK   C:    91ms, R: 1ms v run vlib/v/gen/c/testdata/export_and_weak.vv == vlib/v/gen/c/testdata/export_and_weak.out 
OK   C:    90ms, R: 1ms v run vlib/v/gen/c/testdata/ref_sumtype_map_as_struct_field.vv == vlib/v/gen/c/testdata/ref_sumtype_map_as_struct_field.out 
OK   C:    91ms, R: 1ms v run vlib/v/gen/c/testdata/building_multiple_c_sources.vv == vlib/v/gen/c/testdata/building_multiple_c_sources.out 
OK   C:    89ms, R: 1ms v run vlib/v/gen/c/testdata/const_references.vv == vlib/v/gen/c/testdata/const_references.out 
OK   C:    90ms, R: 2ms v run vlib/v/gen/c/testdata/spawn_call_fn_struct_field.vv == vlib/v/gen/c/testdata/spawn_call_fn_struct_field.out 
OK   C:  3036ms, R: 1ms v -prod -no-skip-unused run vlib/v/gen/c/testdata/embed_with_prod_zlib.vv == vlib/v/gen/c/testdata/embed_with_prod_zlib.out 
OK   C:    84ms, R: 1ms v run vlib/v/gen/c/testdata/sumtype_struct_depend_order.vv == vlib/v/gen/c/testdata/sumtype_struct_depend_order.out 
OK   C:    83ms, R: 1ms v run vlib/v/gen/c/testdata/aligned_attr_nix.vv == vlib/v/gen/c/testdata/aligned_attr_nix.out 
OK   C:    87ms, R: 1ms v run vlib/v/gen/c/testdata/literal_c_variadic_arg.vv == vlib/v/gen/c/testdata/literal_c_variadic_arg.out 
OK   C:    88ms, R: 1ms v run vlib/v/gen/c/testdata/platform_wrapper_non_emscripten.vv == vlib/v/gen/c/testdata/platform_wrapper_non_emscripten.out 
OK   C:    90ms, R: 1ms v run vlib/v/gen/c/testdata/gen_expr_to_string_with_call_and_return_ref.vv == vlib/v/gen/c/testdata/gen_expr_to_string_with_call_and_return_ref.out 
OK   C:    88ms, R: 1ms v run vlib/v/gen/c/testdata/for_in.vv == vlib/v/gen/c/testdata/for_in.out 
OK   C:    86ms, R: 1ms v run vlib/v/gen/c/testdata/volatile.vv == vlib/v/gen/c/testdata/volatile.out 
OK   C:   147ms, R: 1ms v -d callstack run vlib/v/gen/c/testdata/callstack.vv == vlib/v/gen/c/testdata/callstack.out 
OK   C:  2645ms, R: 1ms v -prod run vlib/v/gen/c/testdata/embed_with_prod_and_several_decoders.vv == vlib/v/gen/c/testdata/embed_with_prod_and_several_decoders.out 
OK   C:    84ms, R: 1ms v run vlib/v/gen/c/testdata/array_as_interface.vv == vlib/v/gen/c/testdata/array_as_interface.out 
> testing whether all line patterns in `.c.must_have` files match:
OK   C:   81ms v -o - -enable-globals -no-skip-unused vlib/v/gen/c/testdata/global_initializer_nix.vv matches vlib/v/gen/c/testdata/global_initializer_nix.c.must_have 
OK   C:  107ms v -o - -no-skip-unused vlib/v/gen/c/testdata/embed.vv matches vlib/v/gen/c/testdata/embed.c.must_have 
> skipping vlib/v/gen/c/testdata/aligned_attr_msvc_windows.vv on !windows
OK   C:  106ms v -o - -prod -no-skip-unused vlib/v/gen/c/testdata/embed_with_prod_zlib.vv matches vlib/v/gen/c/testdata/embed_with_prod_zlib.c.must_have 
OK   C:   72ms v -o - -autofree vlib/v/gen/c/testdata/interface_auto_free.vv matches vlib/v/gen/c/testdata/interface_auto_free.c.must_have 
OK   C:   74ms v -o -  vlib/v/gen/c/testdata/compare_structs.vv matches vlib/v/gen/c/testdata/compare_structs.c.must_have 
OK   C:   76ms v -o - -os windows vlib/v/gen/c/testdata/console_windows_program.vv matches vlib/v/gen/c/testdata/console_windows_program.c.must_have 
OK   C:   75ms v -o -  vlib/v/gen/c/testdata/addition.vv matches vlib/v/gen/c/testdata/addition.c.must_have 
OK   C:   83ms v -o -  vlib/v/gen/c/testdata/translated_module.vv matches vlib/v/gen/c/testdata/translated_module.c.must_have 
OK   C:   85ms v -o - -shared vlib/v/gen/c/testdata/closure_shared_lib.vv matches vlib/v/gen/c/testdata/closure_shared_lib.c.must_have 
> skipping vlib/v/gen/c/testdata/waiter_fns_gen_windows.vv on !windows
OK   C:   79ms v -o - -d customflag -no-skip-unused vlib/v/gen/c/testdata/comptime_if_attribute_in_test2.vv matches vlib/v/gen/c/testdata/comptime_if_attribute_in_test2.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/const_references.vv matches vlib/v/gen/c/testdata/const_references.c.must_have 
OK   C:   76ms v -o -  vlib/v/gen/c/testdata/alias_c_parent_type_decl.vv matches vlib/v/gen/c/testdata/alias_c_parent_type_decl.c.must_have 
OK   C:  109ms v -o - -prod -no-skip-unused vlib/v/gen/c/testdata/embed_with_prod.vv matches vlib/v/gen/c/testdata/embed_with_prod.c.must_have 
OK   C:   79ms v -o -  vlib/v/gen/c/testdata/c_extern_on_C_fn_declarations.vv matches vlib/v/gen/c/testdata/c_extern_on_C_fn_declarations.c.must_have 
> skipping vlib/v/gen/c/testdata/aligned_attr_gcc_windows.vv on !windows
OK   C:   77ms v -o - -d not_defined vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.vv matches vlib/v/gen/c/testdata/init_fn_with_if_attr_not_defined.c.must_have 
OK   C:   74ms v -o -  vlib/v/gen/c/testdata/check_combination_of_alias_and_sumtype.vv matches vlib/v/gen/c/testdata/check_combination_of_alias_and_sumtype.c.must_have 
OK   C:   81ms v -o - -os windows vlib/v/gen/c/testdata/gui_windows_program_with_console_tag.vv matches vlib/v/gen/c/testdata/gui_windows_program_with_console_tag.c.must_have 
OK   C:   80ms v -o -  vlib/v/gen/c/testdata/unused_result_err.vv matches vlib/v/gen/c/testdata/unused_result_err.c.must_have 
> skipping vlib/v/gen/c/testdata/spawn_stack_windows.vv on !windows
OK   C:   78ms v -o -  vlib/v/gen/c/testdata/assert_fncalls.vv matches vlib/v/gen/c/testdata/assert_fncalls.c.must_have 
OK   C:   75ms v -o - -enable-globals vlib/v/gen/c/testdata/global_export_nix.vv matches vlib/v/gen/c/testdata/global_export_nix.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/export_and_weak.vv matches vlib/v/gen/c/testdata/export_and_weak.c.must_have 
OK   C:   78ms v -o -  vlib/v/gen/c/testdata/fixed_arr_compare.vv matches vlib/v/gen/c/testdata/fixed_arr_compare.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/spawn_stack_nix.vv matches vlib/v/gen/c/testdata/spawn_stack_nix.c.must_have 
OK   C:   79ms v -o - -autofree vlib/v/gen/c/testdata/autofree_json_encode.vv matches vlib/v/gen/c/testdata/autofree_json_encode.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/if_else_return.vv matches vlib/v/gen/c/testdata/if_else_return.c.must_have 
OK   C:   93ms v -o - -no-skip-unused vlib/v/gen/c/testdata/unused_import_aliased_as_underscore.vv matches vlib/v/gen/c/testdata/unused_import_aliased_as_underscore.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/strlit_len_optimization.vv matches vlib/v/gen/c/testdata/strlit_len_optimization.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/for_in.vv matches vlib/v/gen/c/testdata/for_in.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/c_varargs.vv matches vlib/v/gen/c/testdata/c_varargs.c.must_have 
OK   C:   78ms v -o - -no-skip-unused vlib/v/gen/c/testdata/alias_char_ptr_to_ptr.vv matches vlib/v/gen/c/testdata/alias_char_ptr_to_ptr.c.must_have 
OK   C:   75ms v -o -  vlib/v/gen/c/testdata/aligned_attr_nix.vv matches vlib/v/gen/c/testdata/aligned_attr_nix.c.must_have 
OK   C:   77ms v -o -  vlib/v/gen/c/testdata/linker_section_nix.vv matches vlib/v/gen/c/testdata/linker_section_nix.c.must_have 
OK   C:  114ms v -o - -prod vlib/v/gen/c/testdata/embed_with_prod_and_several_decoders.vv matches vlib/v/gen/c/testdata/embed_with_prod_and_several_decoders.c.must_have 
OK   C:   74ms v -o - -d init_on vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.vv matches vlib/v/gen/c/testdata/init_fn_with_if_attr_defined.c.must_have 
OK   C:   79ms v -o -  vlib/v/gen/c/testdata/waiter_fns_gen_nix.vv matches vlib/v/gen/c/testdata/waiter_fns_gen_nix.c.must_have 
OK   C:   75ms v -o -  vlib/v/gen/c/testdata/enum_switch_case.vv matches vlib/v/gen/c/testdata/enum_switch_case.c.must_have 
OK   C:   78ms v -o -  vlib/v/gen/c/testdata/volatile.vv matches vlib/v/gen/c/testdata/volatile.c.must_have 
OK   C:   80ms v -o -  vlib/v/gen/c/testdata/addr.vv matches vlib/v/gen/c/testdata/addr.c.must_have 
OK   C:   80ms v -o - -enable-globals vlib/v/gen/c/testdata/globals_with_weak_tag.vv matches vlib/v/gen/c/testdata/globals_with_weak_tag.c.must_have 
OK   C:   76ms v -o - -os wasm32_emscripten vlib/v/gen/c/testdata/platform_wrapper_emscripten.vv matches vlib/v/gen/c/testdata/platform_wrapper_emscripten.c.must_have 
OK   C:   76ms v -o -  vlib/v/gen/c/testdata/comp_if_unknown.vv matches vlib/v/gen/c/testdata/comp_if_unknown.c.must_have 
OK   C:   83ms v -o - -shared vlib/v/gen/c/testdata/func_type_dependency.vv matches vlib/v/gen/c/testdata/func_type_dependency.c.must_have 
OK   C:   80ms v -o -  vlib/v/gen/c/testdata/addr_from_range.vv matches vlib/v/gen/c/testdata/addr_from_range.c.must_have 
OK   C:   78ms v -o -  vlib/v/gen/c/testdata/struct_fn_member_print.vv matches vlib/v/gen/c/testdata/struct_fn_member_print.c.must_have 
OK   C:   79ms v -o - -os windows vlib/v/gen/c/testdata/gui_windows_program.vv matches vlib/v/gen/c/testdata/gui_windows_program.c.must_have 
OK   C:   79ms v -o -  vlib/v/gen/c/testdata/c_ident_for_ptr_arg.vv matches vlib/v/gen/c/testdata/c_ident_for_ptr_arg.c.must_have 
$

[davidebeatrici]

What distribution and compiler are you using?

[JalonSolov]

Manjaro on x64, tcc compiler.

[davidebeatrici]

Alright, could you try with GCC, please?

[JalonSolov]

Same successful output. Command was v -cc gcc vlib/v/gen/c/coutput_test.v. Also worked with v -cc clang vlib/v/gen/c/coutput_test.v.

[kbkpbot]

This is because vlib/builtin/linux_bare/linux_syscalls.v has only amd64 implementation, no arm64.

fn sys_call0(scn u64) u64 {
        mut res := u64(0)
        asm amd64 {
                syscall
                ; =a (res)
                ; a (scn)
        }
        return res
}

fn sys_call1(scn u64, arg1 u64) u64 {
        mut res := u64(0)
        asm amd64 {
                syscall
                ; =a (res)
                ; a (scn)
                  D (arg1)
        }
        return res
}
...

[JalonSolov]

That could, indeed, explain what's happening.

[davidebeatrici]

Oh, sorry, I just realized you mentioned building on x64. The test indeed succeeds on that architecture.