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VS Code c_cpp_properties.json example for arm-none-eabi toochain
Raw
c_cpp_properties_for_arm_toolchain.md

VS Code c_cpp_properties.json example for arm-none-eabi toochain

If you installed C/C++ extension for Visual Studio Code but using GNU Arm Embedded Toolchain for ARM Cortex M series MCU target, VS Code will keep prompt "Configuring includePath for better IntelliSense results". You wil need a special c_cpp_properties.json for the ARM toolchain.

This works on both Linux and Windows.

  1. For arm-none-eabi-gcc users, its compiler include path should be included first. It differes in each system. Use the verbose arm-none-eabi-gcc -v flag to see include list. change "includePath" and "browse"."path" for your system.

  2. VS Code currently don't detect internal GCC definitions. We need to manually include them. This is why OP's problem occurs. To see the GCC's definitions use (for ARM Coretex M4 with hard FP):

arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -E -dM - < /dev/null | sort

Then you need to add all definitions printed to "defines". Note that you also need to convert #define DEFINE VALUE to DEFINE=VALUE format. The definitions list is very long but it should be quite easy to convert the format using VS Code!

Reference discussions: 1, 2

Raw
c_cpp_properties_my_example.json
{
"configurations": [
{
"name": "Linux",
"includePath": [
"/usr/lib/gcc/arm-none-eabi/7.3.0/include",
"/usr/lib/gcc/arm-none-eabi/7.3.0/include-fixed",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0/arm-none-eabi/armv7e-m/fpu",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0/backward"
],
"browse": {
"path": [
"/usr/lib/gcc/arm-none-eabi/7.3.0/include",
"/usr/lib/gcc/arm-none-eabi/7.3.0/include-fixed",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0/arm-none-eabi/armv7e-m/fpu",
"/usr/lib/gcc/arm-none-eabi/7.3.0/../../../../arm-none-eabi/include/c++/7.3.0/backward"
],
"limitSymbolsToIncludedHeaders": true,
"databaseFilename": ""
},
"defines": [
"USE_HAL_DRIVER",
"STM32F446xx",
"__ACCUM_EPSILON__=0x1P-15K",
"__ACCUM_FBIT__=15",
"__ACCUM_IBIT__=16",
"__ACCUM_MAX__=0X7FFFFFFFP-15K",
"__ACCUM_MIN__=(-0X1P15K-0X1P15K)",
"__APCS_32__=1",
"__arm__=1",
"__ARM_32BIT_STATE=1",
"__ARM_ARCH=7",
"__ARM_ARCH_7EM__=1",
"__ARM_ARCH_EXT_IDIV__=1",
"__ARM_ARCH_ISA_THUMB=2",
"__ARM_ARCH_PROFILE=77",
"__ARM_ASM_SYNTAX_UNIFIED__=1",
"__ARM_EABI__=1",
"__ARMEL__=1",
"__ARM_FEATURE_CLZ=1",
"__ARM_FEATURE_DSP=1",
"__ARM_FEATURE_IDIV=1",
"__ARM_FEATURE_LDREX=7",
"__ARM_FEATURE_QBIT=1",
"__ARM_FEATURE_SAT=1",
"__ARM_FEATURE_SIMD32=1",
"__ARM_FEATURE_UNALIGNED=1",
"__ARM_FP=12",
"__ARM_PCS_VFP=1",
"__ARM_SIZEOF_MINIMAL_ENUM=1",
"__ARM_SIZEOF_WCHAR_T=4",
"__ATOMIC_ACQ_REL=4",
"__ATOMIC_ACQUIRE=2",
"__ATOMIC_CONSUME=1",
"__ATOMIC_RELAXED=0",
"__ATOMIC_RELEASE=3",
"__ATOMIC_SEQ_CST=5",
"__BIGGEST_ALIGNMENT__=8",
"__BYTE_ORDER__=__ORDER_LITTLE_ENDIAN__",
"__CHAR16_TYPE__=short unsigned int",
"__CHAR32_TYPE__=long unsigned int",
"__CHAR_BIT__=8",
"__CHAR_UNSIGNED__=1",
"__DA_FBIT__=31",
"__DA_IBIT__=32",
"__DBL_DECIMAL_DIG__=17",
"__DBL_DENORM_MIN__=((double)4.9406564584124654e-324L)",
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"__DBL_MAX_EXP__=1024",
"__DBL_MIN_10_EXP__=(-307)",
"__DBL_MIN__=((double)2.2250738585072014e-308L)",
"__DBL_MIN_EXP__=(-1021)",
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"__FLT_MIN__=1.1754943508222875e-38F",
"__FLT_MIN_EXP__=(-125)",
"__FLT_RADIX__=2",
"__FRACT_EPSILON__=0x1P-15R",
"__FRACT_FBIT__=15",
"__FRACT_IBIT__=0",
"__FRACT_MAX__=0X7FFFP-15R",
"__FRACT_MIN__=(-0.5R-0.5R)",
"__GCC_ATOMIC_BOOL_LOCK_FREE=2",
"__GCC_ATOMIC_CHAR16_T_LOCK_FREE=2",
"__GCC_ATOMIC_CHAR32_T_LOCK_FREE=2",
"__GCC_ATOMIC_CHAR_LOCK_FREE=2",
"__GCC_ATOMIC_INT_LOCK_FREE=2",
"__GCC_ATOMIC_LLONG_LOCK_FREE=1",
"__GCC_ATOMIC_LONG_LOCK_FREE=2",
"__GCC_ATOMIC_POINTER_LOCK_FREE=2",
"__GCC_ATOMIC_SHORT_LOCK_FREE=2",
"__GCC_ATOMIC_TEST_AND_SET_TRUEVAL=1",
"__GCC_ATOMIC_WCHAR_T_LOCK_FREE=2",
"__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1=1",
"__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2=1",
"__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4=1",
"__GCC_IEC_559=2",
"__GCC_IEC_559_COMPLEX=2",
"__GNUC__=7",
"__GNUC_MINOR__=3",
"__GNUC_PATCHLEVEL__=0",
"__GNUC_STDC_INLINE__=1",
"__GXX_ABI_VERSION=1011",
"__GXX_TYPEINFO_EQUALITY_INLINE=0",
"__HA_FBIT__=7",
"__HA_IBIT__=8",
"__has_include_next=STR) __has_include_next__(STR)",
"__has_include=STR) __has_include__(STR)",
"__HQ_FBIT__=15",
"__HQ_IBIT__=0",
"__INT16_C=c) c",
"__INT16_MAX__=0x7fff",
"__INT16_TYPE__=short int",
"__INT32_C=c) c ## L",
"__INT32_MAX__=0x7fffffffL",
"__INT32_TYPE__=long int",
"__INT64_C=c) c ## LL",
"__INT64_MAX__=0x7fffffffffffffffLL",
"__INT64_TYPE__=long long int",
"__INT8_C=c) c",
"__INT8_MAX__=0x7f",
"__INT8_TYPE__=signed char",
"__INT_FAST16_MAX__=0x7fffffff",
"__INT_FAST16_TYPE__=int",
"__INT_FAST16_WIDTH__=32",
"__INT_FAST32_MAX__=0x7fffffff",
"__INT_FAST32_TYPE__=int",
"__INT_FAST32_WIDTH__=32",
"__INT_FAST64_MAX__=0x7fffffffffffffffLL",
"__INT_FAST64_TYPE__=long long int",
"__INT_FAST64_WIDTH__=64",
"__INT_FAST8_MAX__=0x7fffffff",
"__INT_FAST8_TYPE__=int",
"__INT_FAST8_WIDTH__=32",
"__INT_LEAST16_MAX__=0x7fff",
"__INT_LEAST16_TYPE__=short int",
"__INT_LEAST16_WIDTH__=16",
"__INT_LEAST32_MAX__=0x7fffffffL",
"__INT_LEAST32_TYPE__=long int",
"__INT_LEAST32_WIDTH__=32",
"__INT_LEAST64_MAX__=0x7fffffffffffffffLL",
"__INT_LEAST64_TYPE__=long long int",
"__INT_LEAST64_WIDTH__=64",
"__INT_LEAST8_MAX__=0x7f",
"__INT_LEAST8_TYPE__=signed char",
"__INT_LEAST8_WIDTH__=8",
"__INT_MAX__=0x7fffffff",
"__INTMAX_C=c) c ## LL",
"__INTMAX_MAX__=0x7fffffffffffffffLL",
"__INTMAX_TYPE__=long long int",
"__INTMAX_WIDTH__=64",
"__INTPTR_MAX__=0x7fffffff",
"__INTPTR_TYPE__=int",
"__INTPTR_WIDTH__=32",
"__INT_WIDTH__=32",
"__LACCUM_EPSILON__=0x1P-31LK",
"__LACCUM_FBIT__=31",
"__LACCUM_IBIT__=32",
"__LACCUM_MAX__=0X7FFFFFFFFFFFFFFFP-31LK",
"__LACCUM_MIN__=(-0X1P31LK-0X1P31LK)",
"__LDBL_DECIMAL_DIG__=17",
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"__LDBL_MIN_10_EXP__=(-307)",
"__LDBL_MIN__=2.2250738585072014e-308L",
"__LDBL_MIN_EXP__=(-1021)",
"__LFRACT_EPSILON__=0x1P-31LR",
"__LFRACT_FBIT__=31",
"__LFRACT_IBIT__=0",
"__LFRACT_MAX__=0X7FFFFFFFP-31LR",
"__LFRACT_MIN__=(-0.5LR-0.5LR)",
"__LLACCUM_EPSILON__=0x1P-31LLK",
"__LLACCUM_FBIT__=31",
"__LLACCUM_IBIT__=32",
"__LLACCUM_MAX__=0X7FFFFFFFFFFFFFFFP-31LLK",
"__LLACCUM_MIN__=(-0X1P31LLK-0X1P31LLK)",
"__LLFRACT_EPSILON__=0x1P-63LLR",
"__LLFRACT_FBIT__=63",
"__LLFRACT_IBIT__=0",
"__LLFRACT_MAX__=0X7FFFFFFFFFFFFFFFP-63LLR",
"__LLFRACT_MIN__=(-0.5LLR-0.5LLR)",
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"__LONG_MAX__=0x7fffffffL",
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"__NO_INLINE__=1",
"__ORDER_BIG_ENDIAN__=4321",
"__ORDER_LITTLE_ENDIAN__=1234",
"__ORDER_PDP_ENDIAN__=3412",
"__PRAGMA_REDEFINE_EXTNAME=1",
"__PTRDIFF_MAX__=0x7fffffff",
"__PTRDIFF_TYPE__=int",
"__PTRDIFF_WIDTH__=32",
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"__QQ_IBIT__=0",
"__REGISTER_PREFIX__",
"__SACCUM_EPSILON__=0x1P-7HK",
"__SACCUM_FBIT__=7",
"__SACCUM_IBIT__=8",
"__SACCUM_MAX__=0X7FFFP-7HK",
"__SACCUM_MIN__=(-0X1P7HK-0X1P7HK)",
"__SA_FBIT__=15",
"__SA_IBIT__=16",
"__SCHAR_MAX__=0x7f",
"__SCHAR_WIDTH__=8",
"__SFRACT_EPSILON__=0x1P-7HR",
"__SFRACT_FBIT__=7",
"__SFRACT_IBIT__=0",
"__SFRACT_MAX__=0X7FP-7HR",
"__SFRACT_MIN__=(-0.5HR-0.5HR)",
"__SHRT_MAX__=0x7fff",
"__SHRT_WIDTH__=16",
"__SIG_ATOMIC_MAX__=0x7fffffff",
"__SIG_ATOMIC_MIN__=(-__SIG_ATOMIC_MAX__ - 1)",
"__SIG_ATOMIC_TYPE__=int",
"__SIG_ATOMIC_WIDTH__=32",
"__SIZE_MAX__=0xffffffffU",
"__SIZEOF_DOUBLE__=8",
"__SIZEOF_FLOAT__=4",
"__SIZEOF_INT__=4",
"__SIZEOF_LONG__=4",
"__SIZEOF_LONG_DOUBLE__=8",
"__SIZEOF_LONG_LONG__=8",
"__SIZEOF_POINTER__=4",
"__SIZEOF_PTRDIFF_T__=4",
"__SIZEOF_SHORT__=2",
"__SIZEOF_SIZE_T__=4",
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"__SIZE_TYPE__=unsigned int",
"__SIZE_WIDTH__=32",
"__SQ_FBIT__=31",
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"__STDC_HOSTED__=1",
"__STDC_UTF_16__=1",
"__STDC_UTF_32__=1",
"__STDC_VERSION__=201112L",
"__TA_FBIT__=63",
"__TA_IBIT__=64",
"__thumb__=1",
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"__THUMBEL__=1",
"__THUMB_INTERWORK__=1",
"__TQ_FBIT__=127",
"__TQ_IBIT__=0",
"__UACCUM_EPSILON__=0x1P-16UK",
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"__UACCUM_IBIT__=16",
"__UACCUM_MAX__=0XFFFFFFFFP-16UK",
"__UACCUM_MIN__=0.0UK",
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"__UFRACT_FBIT__=16",
"__UFRACT_IBIT__=0",
"__UFRACT_MAX__=0XFFFFP-16UR",
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"__UHA_IBIT__=8",
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"__UINT16_C=c) c",
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"__UINT64_TYPE__=long long unsigned int",
"__UINT8_C=c) c",
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"__USACCUM_MAX__=0XFFFFP-8UHK",
"__USACCUM_MIN__=0.0UHK",
"__USA_FBIT__=16",
"__USA_IBIT__=16",
"__USER_LABEL_PREFIX__",
"__USES_INITFINI__=1",
"__USFRACT_EPSILON__=0x1P-8UHR",
"__USFRACT_FBIT__=8",
"__USFRACT_IBIT__=0",
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],
"intelliSenseMode": "clang-x64",
"compilerPath": "arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -mfloat-abi=hard",
"cStandard": "c99",
"cppStandard": "c++11"
},
{
"name": "Win32",
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}
@bobbrow
Copy link

bobbrow commented Oct 14, 2019

There is also "compilerArgs" in c_cpp_properties.json that you can use for the compiler arguments. You should also be able to remove the "browse" section as the extension should be adding the same thing automatically when you don't specify it.

Cheers!

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