Unable to resolve configuration for cygwin64

[franneck94]

Since the latest update i recieve the error/warning about the compiler path for gcc on cygwin64.

[4.2.2021, 08:25:46] Unable to resolve configuration with compilerPath "C:/cygwin64/bin/gcc.exe"

The compiler is correctly installed and works as expected.

Settings:

{
    "configurations": [
        {
            "name": "Win32",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [
                "_DEBUG",
                "UNICODE",
                "_UNICODE"
            ],
            "compilerPath": "C:/cygwin64/bin/gcc.exe",
            "intelliSenseMode": "windows-gcc-x64"
        }
    ],
    "version": 4
}

When i downgrade the extension back to 1.1.3 everything works again.

Software versions:

[Colengms]

Hi Jan Schaffranek (@franneck94) . Could you enable logging with "C_Cpp.loggingLevel": "Debug"? The extension should log what command line it's using te query the compiler (for system includes and system defines). Then, could you run that same command line and provide it's output here?

I'm not able to repro this issue with my own installation of cygwin locally, so I suspect our versions differ.

[franneck94]

Output in C/C++ Config Warnings

[4.2.2021, 20:41:55] Unable to resolve configuration with compilerPath "C:/cygwin64/bin/gcc.exe". Using "C:\cygwin64\bin\gcc.exe" instead.
[4.2.2021, 20:41:55] Unable to resolve configuration with compilerPath "C:/cygwin64/bin/gcc.exe". Using "C:\cygwin64\bin\gcc.exe" instead.

Output in C/C++

cpptools/didChangeCppProperties
Attempting to get defaults from C compiler in "compilerPath" property: 'C:/cygwin64/bin/gcc.exe'
Querying compiler for default C++ language standard using command line: "C:/cygwin64/bin/gcc.exe" -x c++ -E -dM nul
Querying compiler for default C language standard using command line: "C:/cygwin64/bin/gcc.exe" -x c -E -dM nul
Querying compiler's default target using command line: "C:/cygwin64/bin/gcc.exe" -dumpmachine
Compiler returned default target value: x86_64-pc-cygwin

Attempting to get defaults from compiler found on the machine: 'C:\cygwin64\bin\gcc.exe'
Querying compiler for default C++ language standard using command line: "C:\cygwin64\bin\gcc.exe" -x c++ -E -dM nul
Querying compiler for default C language standard using command line: "C:\cygwin64\bin\gcc.exe" -x c -E -dM nul
Querying compiler's default target using command line: "C:\cygwin64\bin\gcc.exe" -dumpmachine
Compiler returned default target value: x86_64-pc-cygwin

No suitable compiler found. Please set the "compilerPath" in c_cpp_properties.json.
Code browsing service initialized
Attempting to get defaults from C++ compiler in "compilerPath" property: 'C:/cygwin64/bin/gcc.exe'
Attempting to get defaults from compiler found on the machine: 'C:\cygwin64\bin\gcc.exe'
No suitable compiler found. Please set the "compilerPath" in c_cpp_properties.json.
Folder: C:/USERS/JAN/DESKTOP/C/ will be indexed
textDocument/didOpen: file:///c%3A/Users/Jan/Desktop/C/main.c
Populate include completion cache.
Discovering files...
cpptools/activeDocumentChange: file:///c%3A/Users/Jan/Desktop/C/main.c
cpptools/textEditorSelectionChange
cpptools/getCodeActions: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 2)
Processing folder (recursive): C:/USERS/JAN/DESKTOP/C/
Discovering files: 3 file(s) processed
0 file(s) removed from database
Done discovering files.
Parsing remaining files...
Parsing: 0 files(s) processed
Done parsing remaining files.
cpptools/getFoldingRanges: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 3)
sending compilation args for C:\USERS\JAN\DESKTOP\C\MAIN.C
include: C:\Users\Jan\Desktop\C
define: _DEBUG
define: UNICODE
define: _UNICODE
other: --gcc
other: --gnu_version=100000
stdver: c99
intelliSenseMode: windows-gcc-x64
Checking for syntax errors: file:///c%3A/Users/Jan/Desktop/C/main.c
Queueing IntelliSense update for files in translation unit of: C:\USERS\JAN\DESKTOP\C\MAIN.C
cpptools/getSemanticTokens: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 4)
cpptools/getCodeActions: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 5)
cpptools/finishUpdateSquiggles
Error squiggle count: 12
Error squiggles will be disabled in: file:///c%3A/Users/Jan/Desktop/C/main.c
Update IntelliSense time (sec): 0.398
cpptools/getFoldingRanges: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 6)
cpptools/getCodeActions: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 7)
cpptools/getCodeActions: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 8)
cpptools/getDocumentSymbols: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 9)
cpptools/getDocumentSymbols
idle loop: reparsing the active document
Checking for syntax errors: file:///c%3A/Users/Jan/Desktop/C/main.c
Queueing IntelliSense update for files in translation unit of: C:\USERS\JAN\DESKTOP\C\MAIN.C
cpptools/finishUpdateSquiggles
Error squiggle count: 12
Update IntelliSense time (sec): 0.252
cpptools/getSemanticTokens: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 10)
cpptools/getFoldingRanges: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 11)
cpptools/getCodeActions: file:///c%3A/Users/Jan/Desktop/C/main.c (id: 12)
cpptools/activeDocumentChange: file:///c%3A/Users/Jan/Desktop/C/main.c
cpptools/textEditorSelectionChange

Compiler

[Joshua-Jurgensmeier]

I just started getting this same error today, except with clang not gcc. After looking into it for a little while, it seems that the problem is with passing "nul" as the input to the compiler. The workaround in #2863 doesn't work for me, as my Null service is running. Jan Schaffranek (@franneck94) Do you get this same output when running these commands in cmd?

`C:\WINDOWS\system32>"C:/cygwin64/bin/gcc.exe" -x c++ -E -dM nul
gcc: error: nul: No such file or directory
gcc: fatal error: no input files
compilation terminated.

C:\WINDOWS\system32>"C:/cygwin64/bin/clang-8.exe" -x c++ -E -dM nul
clang-8: error: no such file or directory: 'nul'
clang-8: error: no input files

C:\WINDOWS\system32>echo hi > in.txt

C:\WINDOWS\system32>"C:/cygwin64/bin/clang-8.exe" -x c++ -E -dM in.txt
#define _GNU_SOURCE 1
#define _LP64 1
#define __ATOMIC_ACQUIRE 2
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_CONSUME 1
#define __ATOMIC_RELAXED 0
#define __ATOMIC_RELEASE 3
#define __ATOMIC_SEQ_CST 5
#define BIGGEST_ALIGNMENT 16
#define BYTE_ORDER ORDER_LITTLE_ENDIAN
#define CHAR16_TYPE unsigned short
#define CHAR32_TYPE unsigned int
#define CHAR_BIT 8
#define __CLANG_ATOMIC_BOOL_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR_LOCK_FREE 2
#define __CLANG_ATOMIC_INT_LOCK_FREE 2
#define __CLANG_ATOMIC_LLONG_LOCK_FREE 2
#define __CLANG_ATOMIC_LONG_LOCK_FREE 2
#define __CLANG_ATOMIC_POINTER_LOCK_FREE 2
#define __CLANG_ATOMIC_SHORT_LOCK_FREE 2
#define __CLANG_ATOMIC_WCHAR_T_LOCK_FREE 2
#define CONSTANT_CFSTRINGS 1
#define CYGWIN64 1
#define CYGWIN 1
#define DBL_DECIMAL_DIG 17
#define DBL_DENORM_MIN 4.9406564584124654e-324
#define DBL_DIG 15
#define DBL_EPSILON 2.2204460492503131e-16
#define DBL_HAS_DENORM 1
#define DBL_HAS_INFINITY 1
#define DBL_HAS_QUIET_NAN 1
#define DBL_MANT_DIG 53
#define DBL_MAX_10_EXP 308
#define DBL_MAX_EXP 1024
#define DBL_MAX 1.7976931348623157e+308
#define DBL_MIN_10_EXP (-307)
#define DBL_MIN_EXP (-1021)
#define DBL_MIN 2.2250738585072014e-308
#define DECIMAL_DIG LDBL_DECIMAL_DIG
#define __DEPRECATED 1
#define __EXCEPTIONS 1
#define FINITE_MATH_ONLY 0
#define FLT16_DECIMAL_DIG 5
#define FLT16_DENORM_MIN 5.9604644775390625e-8F16
#define FLT16_DIG 3
#define FLT16_EPSILON 9.765625e-4F16
#define FLT16_HAS_DENORM 1
#define FLT16_HAS_INFINITY 1
#define FLT16_HAS_QUIET_NAN 1
#define FLT16_MANT_DIG 11
#define FLT16_MAX_10_EXP 4
#define FLT16_MAX_EXP 15
#define FLT16_MAX 6.5504e+4F16
#define FLT16_MIN_10_EXP (-13)
#define FLT16_MIN_EXP (-14)
#define FLT16_MIN 6.103515625e-5F16
#define FLT_DECIMAL_DIG 9
#define FLT_DENORM_MIN 1.40129846e-45F
#define FLT_DIG 6
#define FLT_EPSILON 1.19209290e-7F
#define FLT_EVAL_METHOD 0
#define FLT_HAS_DENORM 1
#define FLT_HAS_INFINITY 1
#define FLT_HAS_QUIET_NAN 1
#define FLT_MANT_DIG 24
#define FLT_MAX_10_EXP 38
#define FLT_MAX_EXP 128
#define FLT_MAX 3.40282347e+38F
#define FLT_MIN_10_EXP (-37)
#define FLT_MIN_EXP (-125)
#define FLT_MIN 1.17549435e-38F
#define FLT_RADIX 2
#define FXSR 1
#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
#define __GCC_ATOMIC_INT_LOCK_FREE 2
#define __GCC_ATOMIC_LLONG_LOCK_FREE 2
#define __GCC_ATOMIC_LONG_LOCK_FREE 2
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GLIBCXX_BITSIZE_INT_N_0 128
#define __GLIBCXX_TYPE_INT_N_0 __int128
#define GNUC_GNU_INLINE 1
#define GNUC_MINOR 2
#define GNUC_PATCHLEVEL 1
#define GNUC 4
#define GNUG 4
#define __GXX_ABI_VERSION 1002
#define GXX_EXPERIMENTAL_CXX0X 1
#define __GXX_RTTI 1
#define GXX_WEAK 1
#define INT16_C_SUFFIX
#define INT16_FMTd "hd"
#define INT16_FMTi "hi"
#define INT16_MAX 32767
#define INT16_TYPE short
#define INT32_C_SUFFIX
#define INT32_FMTd "d"
#define INT32_FMTi "i"
#define INT32_MAX 2147483647
#define INT32_TYPE int
#define INT64_C_SUFFIX L
#define INT64_FMTd "ld"
#define INT64_FMTi "li"
#define INT64_MAX 9223372036854775807L
#define INT64_TYPE long int
#define INT8_C_SUFFIX
#define INT8_FMTd "hhd"
#define INT8_FMTi "hhi"
#define INT8_MAX 127
#define INT8_TYPE signed char
#define INTMAX_C_SUFFIX L
#define INTMAX_FMTd "ld"
#define INTMAX_FMTi "li"
#define INTMAX_MAX 9223372036854775807L
#define INTMAX_TYPE long int
#define INTMAX_WIDTH 64
#define INTPTR_FMTd "ld"
#define INTPTR_FMTi "li"
#define INTPTR_MAX 9223372036854775807L
#define INTPTR_TYPE long int
#define INTPTR_WIDTH 64
#define INT_FAST16_FMTd "hd"
#define INT_FAST16_FMTi "hi"
#define INT_FAST16_MAX 32767
#define INT_FAST16_TYPE short
#define INT_FAST32_FMTd "d"
#define INT_FAST32_FMTi "i"
#define INT_FAST32_MAX 2147483647
#define INT_FAST32_TYPE int
#define INT_FAST64_FMTd "ld"
#define INT_FAST64_FMTi "li"
#define INT_FAST64_MAX 9223372036854775807L
#define INT_FAST64_TYPE long int
#define INT_FAST8_FMTd "hhd"
#define INT_FAST8_FMTi "hhi"
#define INT_FAST8_MAX 127
#define INT_FAST8_TYPE signed char
#define INT_LEAST16_FMTd "hd"
#define INT_LEAST16_FMTi "hi"
#define INT_LEAST16_MAX 32767
#define INT_LEAST16_TYPE short
#define INT_LEAST32_FMTd "d"
#define INT_LEAST32_FMTi "i"
#define INT_LEAST32_MAX 2147483647
#define INT_LEAST32_TYPE int
#define INT_LEAST64_FMTd "ld"
#define INT_LEAST64_FMTi "li"
#define INT_LEAST64_MAX 9223372036854775807L
#define INT_LEAST64_TYPE long int
#define INT_LEAST8_FMTd "hhd"
#define INT_LEAST8_FMTi "hhi"
#define INT_LEAST8_MAX 127
#define INT_LEAST8_TYPE signed char
#define INT_MAX 2147483647
#define LDBL_DECIMAL_DIG 21
#define LDBL_DENORM_MIN 3.64519953188247460253e-4951L
#define LDBL_DIG 18
#define LDBL_EPSILON 1.08420217248550443401e-19L
#define LDBL_HAS_DENORM 1
#define LDBL_HAS_INFINITY 1
#define LDBL_HAS_QUIET_NAN 1
#define LDBL_MANT_DIG 64
#define LDBL_MAX_10_EXP 4932
#define LDBL_MAX_EXP 16384
#define LDBL_MAX 1.18973149535723176502e+4932L
#define LDBL_MIN_10_EXP (-4931)
#define LDBL_MIN_EXP (-16381)
#define LDBL_MIN 3.36210314311209350626e-4932L
#define LITTLE_ENDIAN 1
#define LONG_LONG_MAX 9223372036854775807LL
#define LONG_MAX 9223372036854775807L
#define LP64 1
#define MMX 1
#define NO_INLINE 1
#define __NO_MATH_INLINES 1
#define __OBJC_BOOL_IS_BOOL 0
#define __OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES 3
#define __OPENCL_MEMORY_SCOPE_DEVICE 2
#define __OPENCL_MEMORY_SCOPE_SUB_GROUP 4
#define __OPENCL_MEMORY_SCOPE_WORK_GROUP 1
#define __OPENCL_MEMORY_SCOPE_WORK_ITEM 0
#define ORDER_BIG_ENDIAN 4321
#define ORDER_LITTLE_ENDIAN 1234
#define ORDER_PDP_ENDIAN 3412
#define PIC 2
#define POINTER_WIDTH 64
#define __PRAGMA_REDEFINE_EXTNAME 1
#define PTRDIFF_FMTd "ld"
#define PTRDIFF_FMTi "li"
#define PTRDIFF_MAX 9223372036854775807L
#define PTRDIFF_TYPE long int
#define PTRDIFF_WIDTH 64
#define REGISTER_PREFIX
#define SCHAR_MAX 127
#define SEH 1
#define SHRT_MAX 32767
#define SIG_ATOMIC_MAX 2147483647
#define SIG_ATOMIC_WIDTH 32
#define SIZEOF_DOUBLE 8
#define SIZEOF_FLOAT 4
#define SIZEOF_INT128 16
#define SIZEOF_INT 4
#define SIZEOF_LONG_DOUBLE 16
#define SIZEOF_LONG_LONG 8
#define SIZEOF_LONG 8
#define SIZEOF_POINTER 8
#define SIZEOF_PTRDIFF_T 8
#define SIZEOF_SHORT 2
#define SIZEOF_SIZE_T 8
#define SIZEOF_WCHAR_T 2
#define SIZEOF_WINT_T 4
#define SIZE_FMTX "lX"
#define SIZE_FMTo "lo"
#define SIZE_FMTu "lu"
#define SIZE_FMTx "lx"
#define SIZE_MAX 18446744073709551615UL
#define SIZE_TYPE long unsigned int
#define SIZE_WIDTH 64
#define SSE2_MATH 1
#define SSE2 1
#define SSE_MATH 1
#define SSE 1
#define STDCPP_DEFAULT_NEW_ALIGNMENT 16UL
#define STDC_HOSTED 1
#define STDC_UTF_16 1
#define STDC_UTF_32 1
#define STDC 1
#define UINT16_C_SUFFIX
#define UINT16_FMTX "hX"
#define UINT16_FMTo "ho"
#define UINT16_FMTu "hu"
#define UINT16_FMTx "hx"
#define UINT16_MAX 65535
#define UINT16_TYPE unsigned short
#define UINT32_C_SUFFIX U
#define UINT32_FMTX "X"
#define UINT32_FMTo "o"
#define UINT32_FMTu "u"
#define UINT32_FMTx "x"
#define UINT32_MAX 4294967295U
#define UINT32_TYPE unsigned int
#define UINT64_C_SUFFIX UL
#define UINT64_FMTX "lX"
#define UINT64_FMTo "lo"
#define UINT64_FMTu "lu"
#define UINT64_FMTx "lx"
#define UINT64_MAX 18446744073709551615UL
#define UINT64_TYPE long unsigned int
#define UINT8_C_SUFFIX
#define UINT8_FMTX "hhX"
#define UINT8_FMTo "hho"
#define UINT8_FMTu "hhu"
#define UINT8_FMTx "hhx"
#define UINT8_MAX 255
#define UINT8_TYPE unsigned char
#define UINTMAX_C_SUFFIX UL
#define UINTMAX_FMTX "lX"
#define UINTMAX_FMTo "lo"
#define UINTMAX_FMTu "lu"
#define UINTMAX_FMTx "lx"
#define UINTMAX_MAX 18446744073709551615UL
#define UINTMAX_TYPE long unsigned int
#define UINTMAX_WIDTH 64
#define UINTPTR_FMTX "lX"
#define UINTPTR_FMTo "lo"
#define UINTPTR_FMTu "lu"
#define UINTPTR_FMTx "lx"
#define UINTPTR_MAX 18446744073709551615UL
#define UINTPTR_TYPE long unsigned int
#define UINTPTR_WIDTH 64
#define UINT_FAST16_FMTX "hX"
#define UINT_FAST16_FMTo "ho"
#define UINT_FAST16_FMTu "hu"
#define UINT_FAST16_FMTx "hx"
#define UINT_FAST16_MAX 65535
#define UINT_FAST16_TYPE unsigned short
#define UINT_FAST32_FMTX "X"
#define UINT_FAST32_FMTo "o"
#define UINT_FAST32_FMTu "u"
#define UINT_FAST32_FMTx "x"
#define UINT_FAST32_MAX 4294967295U
#define UINT_FAST32_TYPE unsigned int
#define UINT_FAST64_FMTX "lX"
#define UINT_FAST64_FMTo "lo"
#define UINT_FAST64_FMTu "lu"
#define UINT_FAST64_FMTx "lx"
#define UINT_FAST64_MAX 18446744073709551615UL
#define UINT_FAST64_TYPE long unsigned int
#define UINT_FAST8_FMTX "hhX"
#define UINT_FAST8_FMTo "hho"
#define UINT_FAST8_FMTu "hhu"
#define UINT_FAST8_FMTx "hhx"
#define UINT_FAST8_MAX 255
#define UINT_FAST8_TYPE unsigned char
#define UINT_LEAST16_FMTX "hX"
#define UINT_LEAST16_FMTo "ho"
#define UINT_LEAST16_FMTu "hu"
#define UINT_LEAST16_FMTx "hx"
#define UINT_LEAST16_MAX 65535
#define UINT_LEAST16_TYPE unsigned short
#define UINT_LEAST32_FMTX "X"
#define UINT_LEAST32_FMTo "o"
#define UINT_LEAST32_FMTu "u"
#define UINT_LEAST32_FMTx "x"
#define UINT_LEAST32_MAX 4294967295U
#define UINT_LEAST32_TYPE unsigned int
#define UINT_LEAST64_FMTX "lX"
#define UINT_LEAST64_FMTo "lo"
#define UINT_LEAST64_FMTu "lu"
#define UINT_LEAST64_FMTx "lx"
#define UINT_LEAST64_MAX 18446744073709551615UL
#define UINT_LEAST64_TYPE long unsigned int
#define UINT_LEAST8_FMTX "hhX"
#define UINT_LEAST8_FMTo "hho"
#define UINT_LEAST8_FMTu "hhu"
#define UINT_LEAST8_FMTx "hhx"
#define UINT_LEAST8_MAX 255
#define UINT_LEAST8_TYPE unsigned char
#define USER_LABEL_PREFIX
#define VERSION "4.2.1 Compatible Clang 8.0.1 (tags/RELEASE_801/final)"
#define WCHAR_MAX 65535
#define WCHAR_TYPE unsigned short
#define WCHAR_UNSIGNED 1
#define WCHAR_WIDTH 16
#define WINT_MAX 2147483647
#define WINT_TYPE int
#define WINT_WIDTH 32
#define __amd64 1
#define amd64 1
#define __cdecl attribute((cdecl))
#define clang 1
#define clang_major 8
#define clang_minor 0
#define clang_patchlevel 1
#define clang_version "8.0.1 (tags/RELEASE_801/final)"
#define _code_model_small 1
#define __cplusplus 201402L
#define __cpp_aggregate_nsdmi 201304L
#define __cpp_alias_templates 200704L
#define __cpp_attributes 200809L
#define __cpp_binary_literals 201304L
#define __cpp_constexpr 201304L
#define __cpp_decltype 200707L
#define __cpp_decltype_auto 201304L
#define __cpp_delegating_constructors 200604L
#define __cpp_digit_separators 201309L
#define __cpp_exceptions 199711L
#define __cpp_generic_lambdas 201304L
#define __cpp_impl_destroying_delete 201806L
#define __cpp_inheriting_constructors 201511L
#define __cpp_init_captures 201304L
#define __cpp_initializer_lists 200806L
#define __cpp_lambdas 200907L
#define __cpp_nsdmi 200809L
#define __cpp_range_based_for 200907
#define __cpp_raw_strings 200710L
#define __cpp_ref_qualifiers 200710L
#define __cpp_return_type_deduction 201304L
#define __cpp_rtti 199711L
#define __cpp_rvalue_references 200610L
#define __cpp_static_assert 200410
#define __cpp_threadsafe_static_init 200806L
#define __cpp_unicode_characters 200704L
#define __cpp_unicode_literals 200710L
#define __cpp_user_defined_literals 200809L
#define __cpp_variable_templates 201304L
#define __cpp_variadic_templates 200704L
#define __declspec(a) attribute((a))
#define __fastcall attribute((fastcall))
#define __k8 1
#define k8 1
#define llvm 1
#define __pascal attribute((pascal))
#define pic 2
#define private_extern extern
#define __stdcall attribute((stdcall))
#define __thiscall attribute((thiscall))
#define tune_k8 1
#define __unix 1
#define unix 1
#define __x86_64 1
#define x86_64 1
#define _cdecl attribute((cdecl))
#define _fastcall attribute((fastcall))
#define _pascal attribute((pascal))
#define _stdcall attribute((stdcall))
#define _thiscall attribute((thiscall))
#define unix 1

C:\WINDOWS\system32>`

[Colengms]

Thanks Jan Schaffranek (@franneck94) and Joshua Jurgensmeier (@Joshua-Jurgensmeier) . Indeed, the issue is due to a bug in the fallback logic to try "/dev/null" instead of "nul". We have a fix in the works, and are looking at releasing 1.2.1 early next week.

[sean-mcmanus]

Fixed with https://github.com/microsoft/vscode-cpptools/releases/tag/1.2.1