settings.yml

The input settings for packages in Conan are predefined in ~/.conan/settings.yml file, so only a few like os or compiler are possible. These are the default values, but it is possible to customize them, see Customizing settings.

# Only for cross building, 'os_build/arch_build' is the system that runs Conan
os_build: [Windows, WindowsStore, Linux, Macos, FreeBSD, SunOS, AIX]
arch_build: [x86, x86_64, ppc32be, ppc32, ppc64le, ppc64, armv5el, armv5hf, armv6, armv7, armv7hf, armv7s, armv7k, armv8, armv8_32, armv8.3, sparc, sparcv9, mips, mips64, avr, s390, s390x, sh4le, e2k-v2, e2k-v3, e2k-v4, e2k-v5, e2k-v6, e2k-v7]

# Only for building cross compilation tools, 'os_target/arch_target' is the system for
# which the tools generate code
os_target: [Windows, Linux, Macos, Android, iOS, watchOS, tvOS, FreeBSD, SunOS, AIX, Arduino, Neutrino]
arch_target: [x86, x86_64, ppc32be, ppc32, ppc64le, ppc64, armv5el, armv5hf, armv6, armv7, armv7hf, armv7s, armv7k, armv8, armv8_32, armv8.3, sparc, sparcv9, mips, mips64, avr, s390, s390x, asm.js, wasm, sh4le, e2k-v2, e2k-v3, e2k-v4, e2k-v5, e2k-v6, e2k-v7]

# Rest of the settings are "host" settings:
# - For native building/cross building: Where the library/program will run.
# - For building cross compilation tools: Where the cross compiler will run.
os:
    Windows:
        subsystem: [None, cygwin, msys, msys2, wsl]
    WindowsStore:
        version: ["8.1", "10.0"]
    WindowsCE:
        platform: ANY
        version: ["5.0", "6.0", "7.0", "8.0"]
    Linux:
    Macos:
        version: [None, "10.6", "10.7", "10.8", "10.9", "10.10", "10.11", "10.12", "10.13", "10.14", "10.15", "11.0"]
        sdk: [None, "macosx"]
        subsystem: [None, catalyst]
    Android:
        api_level: ANY
    iOS:
        version: ["7.0", "7.1", "8.0", "8.1", "8.2", "8.3", "9.0", "9.1", "9.2", "9.3", "10.0", "10.1", "10.2", "10.3", "11.0", "11.1", "11.2", "11.3", "11.4", "12.0", "12.1", "12.2", "12.3", "12.4", "13.0", "13.1", "13.2", "13.3", "13.4", "13.5", "13.6"]
        sdk: [None, "iphoneos", "iphonesimulator"]
    watchOS:
        version: ["4.0", "4.1", "4.2", "4.3", "5.0", "5.1", "5.2", "5.3", "6.0", "6.1"]
        sdk: [None, "watchos", "watchsimulator"]
    tvOS:
        version: ["11.0", "11.1", "11.2", "11.3", "11.4", "12.0", "12.1", "12.2", "12.3", "12.4", "13.0"]
        sdk: [None, "appletvos", "appletvsimulator"]
    FreeBSD:
    SunOS:
    AIX:
    Arduino:
        board: ANY
    Emscripten:
    Neutrino:
        version: ["6.4", "6.5", "6.6", "7.0"]
    baremetal:
arch: [x86, x86_64, ppc32be, ppc32, ppc64le, ppc64, armv4, armv4i, armv5el, armv5hf, armv6, armv7, armv7hf, armv7s, armv7k, armv8, armv8_32, armv8.3, sparc, sparcv9, mips, mips64, avr, s390, s390x, asm.js, wasm, sh4le, e2k-v2, e2k-v3, e2k-v4, e2k-v5, e2k-v6, e2k-v7]
compiler:
    sun-cc:
        version: ["5.10", "5.11", "5.12", "5.13", "5.14"]
        threads: [None, posix]
        libcxx: [libCstd, libstdcxx, libstlport, libstdc++]
    gcc: &gcc
        version: ["4.1", "4.4", "4.5", "4.6", "4.7", "4.8", "4.9",
                  "5", "5.1", "5.2", "5.3", "5.4", "5.5",
                  "6", "6.1", "6.2", "6.3", "6.4", "6.5",
                  "7", "7.1", "7.2", "7.3", "7.4", "7.5",
                  "8", "8.1", "8.2", "8.3", "8.4",
                  "9", "9.1", "9.2", "9.3",
                  "10", "10.1"]
        libcxx: [libstdc++, libstdc++11]
        threads: [None, posix, win32] #  Windows MinGW
        exception: [None, dwarf2, sjlj, seh] # Windows MinGW
        cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20]
    Visual Studio: &visual_studio
        runtime: [MD, MT, MTd, MDd]
        version: ["8", "9", "10", "11", "12", "14", "15", "16"]
        toolset: [None, v90, v100, v110, v110_xp, v120, v120_xp,
                  v140, v140_xp, v140_clang_c2, LLVM-vs2012, LLVM-vs2012_xp,
                  LLVM-vs2013, LLVM-vs2013_xp, LLVM-vs2014, LLVM-vs2014_xp,
                  LLVM-vs2017, LLVM-vs2017_xp, v141, v141_xp, v141_clang_c2, v142,
                  llvm, ClangCL]
        cppstd: [None, 14, 17, 20]
     msvc:
        version: [190, 191, 192, 193]
        update: [None, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
        runtime: [static, dynamic]
        runtime_type: [Debug, Release]
        cppstd: [14, 17, 20, 23]
    clang:
        version: ["3.3", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "4.0",
                  "5.0", "6.0", "7.0", "7.1",
                  "8", "9", "10", "11", "12", "13"]
        libcxx: [None, libstdc++, libstdc++11, libc++, c++_shared, c++_static]
        cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20]
        runtime: [None, MD, MT, MTd, MDd]
    apple-clang: &apple_clang
        version: ["5.0", "5.1", "6.0", "6.1", "7.0", "7.3", "8.0", "8.1", "9.0", "9.1", "10.0", "11.0", "12.0"]
        libcxx: [libstdc++, libc++]
        cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20]
    intel:
        version: ["11", "12", "13", "14", "15", "16", "17", "18", "19"]
        update: [None, ANY]
        base:
            gcc:
                <<: *gcc
                threads: [None]
                exception: [None]
            Visual Studio:
                <<: *visual_studio
            apple-clang:
                <<: *apple_clang
    intel-cc:
        version: ["2021.1", "2021.2", "2021.3"]
        update: [None, ANY]
        mode: ["icx", "classic", "dpcpp"]
        libcxx: [None, libstdc++, libstdc++11, libc++]
        cppstd: [None, 98, gnu98, 03, gnu03, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20, 23, gnu23]
        runtime: [None, static, dynamic]
        runtime_type: [None, Debug, Release]
    qcc:
        version: ["4.4", "5.4"]
        libcxx: [cxx, gpp, cpp, cpp-ne, accp, acpp-ne, ecpp, ecpp-ne]
    mcst-lcc:
        version: ["1.19", "1.20", "1.21", "1.22", "1.23", "1.24", "1.25"]
        base:
            gcc:
                <<: *gcc
                threads: [None]
                exceptions: [None]

build_type: [None, Debug, Release, RelWithDebInfo, MinSizeRel]
cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20]  # Deprecated, use compiler.cppstd

As you can see, the possible values settings can take are restricted in the same file. This is done to ensure matching naming and spelling as well as defining a common settings model among users and the OSS community. If a setting is allowed to be set to any value, you can use ANY. If a setting is allowed to be set to any value or it can also be unset, you can use [None, ANY].

However, this configuration file can be modified to any needs, including new settings or subsettings and their values. If you want to distribute a unified settings.yml file you can use the conan config install command.

Note

The settings.yml file is not perfect nor definitive and surely incomplete. Please share any suggestion in the Conan issue tracker with any missing settings and values that could make sense for other users.

To force the creation of the settings.yml the command conan config init is available.

Operating systems

baremetal operating system (introduced in Conan 1.43) is a convention meaning that the binaries run directly on the hardware, without a operating system or equivalent layer. This is to differentiate to the None value, which is associated to the “this value is not defined” semantics. The baremetal is a common name convention for embedded microprocessors and microcontrollers code. It is expected that users might customize the space inside the baremetal setting with further subsettings to specify their specific hardware platforms, boards, families, etc. At the moment (Conan 1.43) the os=baremetal value is still not used by Conan builtin toolchains and helpers, but it is expected that they can evolve and start using it.

Compilers

Some notes about different compilers:

msvc

The new msvc compiler is a new, experimental one, that is intended to deprecate the Visual Studio one in Conan 2.0:

  • It uses the compiler version, that is 190 (19.0), 191 (19.1), etc, instead of the Visual Studio IDE (15, 16, etc).

  • It is only used by the new build integrations in conan.tools.cmake and conan.tools.microsoft, but not the previous ones.

  • At the moment it implements a compatible_packages fallback to Visual Studio compiled packages, that is, previous existing binaries compiled with settings.compiler="Visual Studio" can be used for the msvc compiler if no binaries exist for it yet. This behavior can be opted-out with core.package_id:msvc_visual_incompatible global.conf configuration.

When using the msvc compiler, the Visual Studio toolset version (the actual vcvars activation and MSBuild location) will be defined by the default provide of that compiler version:

  • msvc compiler version ‘190’: Visual Studio 14 2015

  • msvc compiler version ‘191’: Visual Studio 15 2017

  • msvc compiler version ‘192’: Visual Studio 16 2019

This can be configured in your profiles with the tools.microsoft.msbuild:vs_version configuration:

[settings]
compiler=msvc
compiler.version=190

[conf]
tools.microsoft.msbuild:vs_version = 16

In this case, the vcvars will activate the Visual Studio 16 installation, but the 190 compiler version will still be used because the necessary toolset=v140 will be set.

The settings define the last digit update: [None, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9], which by default is None, means that Conan assumes binary compatibility for the compiler patches, which works in general for the Microsoft compilers. For cases where finer control is desired, you can just add the update part to your profiles:

[settings]
compiler=msvc
compiler.version=191
compiler.version.update=3

This will be equivalent to the full version 1913 (19.13). If even further details is desired, you could even add your own digits to the update subsetting in settings.yml.

clang

The release 13.0.0 will be released officially on September 21, 2021. However, Conan 1.40 will support it in settings.yml before the final release. It will be considered as experimental in case of incompatibility until the release.

intel-cc

Available since: 1.41.0

This compiler is a new, experimental one, aimed to handle the new Intel oneAPI DPC++/C++/Classic compilers. Instead of having n different compilers, you have 3 different modes of working:

  • icx for Intel oneAPI C++.

  • dpcpp for Intel oneAPI DPC++.

  • classic for Intel C++ Classic ones.

Besides that, Intel releases some versions with revisions numbers so the update field it’s supposed to be any possible minor number for the Intel compiler version used, e.g, compiler.version=2021.1 and compiler.update=311 mean Intel version is 2021.1.311.

For more information, you can check the IntelCC section.

Architectures

Here you can find a brief explanation of each of the architectures defined as arch, arch_build and arch_target settings.

  • x86: The popular 32 bit x86 architecture.

  • x86_64: The popular 64 bit x64 architecture.

  • ppc64le: The PowerPC 64 bit Big Endian architecture.

  • ppc32: The PowerPC 32 bit architecture.

  • ppc64le: The PowerPC 64 bit Little Endian architecture.

  • ppc64: The PowerPC 64 bit Big Endian architecture.

  • armv5el: The ARM 32 bit version 5 architecture, soft-float.

  • armv5hf: The ARM 32 bit version 5 architecture, hard-float.

  • armv6: The ARM 32 bit version 6 architecture.

  • armv7: The ARM 32 bit version 7 architecture.

  • armv7hf: The ARM 32 bit version 7 hard-float architecture.

  • armv7s: The ARM 32 bit version 7 swift architecture mostly used in Apple’s A6 and A6X chips on iPhone 5, iPhone 5C and iPad 4.

  • armv7k: The ARM 32 bit version 7 k architecture mostly used in Apple’s WatchOS.

  • armv8: The ARM 64 bit and 32 bit compatible version 8 architecture. It covers only the aarch64 instruction set.

  • armv8_32: The ARM 32 bit version 8 architecture. It covers only the aarch32 instruction set (a.k.a. ILP32).

  • armv8.3: The ARM 64 bit and 32 bit compatible version 8.3 architecture. Also known as arm64e, it is used on the A12 chipset added in the latest iPhone models (XS/XS Max/XR).

  • sparc: The SPARC (Scalable Processor Architecture) originally developed by Sun Microsystems.

  • sparcv9: The SPARC version 9 architecture.

  • mips: The 32 bit MIPS (Microprocessor without Interlocked Pipelined Stages) developed by MIPS Technologies (formerly MIPS Computer Systems).

  • mips64: The 64 bit MIPS (Microprocessor without Interlocked Pipelined Stages) developed by MIPS Technologies (formerly MIPS Computer Systems).

  • avr: The 8 bit AVR microcontroller architecture developed by Atmel (Microchip Technology).

  • s390: The 32 bit address Enterprise Systems Architecture 390 from IBM.

  • s390x: The 64 bit address Enterprise Systems Architecture 390 from IBM.

  • asm.js: The subset of JavaScript that can be used as low-level target for compilers, not really a processor architecture, it’s produced by Emscripten. Conan treats it as an architecture to align with build systems design (e.g. GNU auto tools and CMake).

  • wasm: The Web Assembly, not really a processor architecture, but byte-code format for Web, it’s produced by Emscripten. Conan treats it as an architecture to align with build systems design (e.g. GNU auto tools and CMake).

  • sh4le: The Hitachi SH-4 SuperH architecture.

  • e2k-v2: The Elbrus 2000 v2 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 2CM, Elbrus 2C+ CPUs) originally developed by MCST (Moscow Center of SPARC Technologies).

  • e2k-v3: The Elbrus 2000 v3 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 2S, aka Elbrus 4C, CPU) originally developed by MCST (Moscow Center of SPARC Technologies).

  • e2k-v4: The Elbrus 2000 v4 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 8C, Elbrus 8C1, Elbrus 1C+ and Elbrus 1CK CPUs) originally developed by MCST (Moscow Center of SPARC Technologies).

  • e2k-v5: The Elbrus 2000 v5 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 8C2 ,aka Elbrus 8CB, CPU) originally developed by MCST (Moscow Center of SPARC Technologies).

  • e2k-v6: The Elbrus 2000 v6 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 2C3, Elbrus 12C and Elbrus 16C CPUs) originally developed by MCST (Moscow Center of SPARC Technologies).

  • e2k-v7: The Elbrus 2000 v7 512 bit VLIW (Very Long Instruction Word) architecture (Elbrus 32C CPU) originally developed by MCST (Moscow Center of SPARC Technologies).

C++ standard libraries (aka compiler.libcxx)

compiler.libcxx sub-setting defines C++ standard libraries implementation to be used. The sub-setting applies only to certain compilers, e.g. it applies to clang, apple-clang and gcc, but doesn’t apply to Visual Studio.