- `ASM_MARMASM` [Microsoft ARM Assembler](https://learn.microsoft.com/en-us/cpp/assembler/arm/arm-assembler-command-line-reference)
- `ASM-ATT`
- `Java` (undocumented)
- `RC` (undocumented)
After a language is enabled, adding sources files with the corresponding extension to your target will automatically use the appropriate compiler/assembler for it.
_Note_: It is generally discouraged to disable the `C` language, unless you are absolutely sure it is not used. Sometimes projects added with `fetch-content` implicitly require it and the error messages can be extremely confusing.
## Conditions
You can specify your own conditions and use them in any `condition` field:
This will make the `arch64` and `arch32` conditions available with their respective CMake expressions.
This will make the `arch64` and `arch32` conditions available with their respective CMake expressions.
You can also prefix most keys with `condition.` to represent a conditional:
@ -72,8 +98,10 @@ unix = "UNIX"
bsd = "CMAKE_SYSTEM_NAME MATCHES \"BSD\""
linux = "CMAKE_SYSTEM_NAME MATCHES \"Linux\""
gcc = "CMAKE_CXX_COMPILER_ID STREQUAL \"GNU\" OR CMAKE_C_COMPILER_ID STREQUAL \"GNU\""
clang = "CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" OR CMAKE_C_COMPILER_ID MATCHES \"Clang\""
msvc = "MSVC"
clang = "(CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\") OR (CMAKE_C_COMPILER_ID MATCHES \"Clang\" AND NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\")"
clang-cl = "(CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\") OR (CMAKE_C_COMPILER_ID MATCHES \"Clang\" AND CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\")"
clang-any = "CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" OR CMAKE_C_COMPILER_ID MATCHES \"Clang\""
MYPROJECT_SPECIAL_OPTION = { value = true, help = "Docstring for this option." }
MYPROJECT_BUILD_EXAMPLES = "root"
```
Options correspond to [CMake cache variables](https://cmake.org/cmake/help/book/mastering-cmake/chapter/CMake%20Cache.html) that can be used to customize your project at configure-time. You can configure with `cmake -DMYPROJECT_BUILD_TESTS=ON` to enable the option. Every option automatically gets a corresponding [condition](#conditions).
The special value `root` can be used to set the option to `true` if the project is compiled as the root project (it will be `false` if someone is including your project via `[fetch-content]` or `[subdir]`).
To avoid repeating yourself you can create your own target type and use it in your targets:
```toml
[template.example]
condition = "MYPROJECT_BUILD_EXAMPLES"
type = "executable"
link-libraries = ["myproject::mylib"]
add-function = ""
pass-sources = false
# Properties from the template are merged with the ones here
[target.myexample]
type = "example"
sources = ["src/myexample.cpp"]
```
The properties declared on a `template` are the same as the ones you use for targets. The only exceptions are:
- `add-function`: Specifies a custom add function. Projects like [pybind11](https://pybind11.readthedocs.io/en/stable/cmake/index.html#new-findpython-mode) have their own `add_xxx` function, which you can specify here.
- `pass-sources`: Pass sources directly to the add function instead of using `target_sources`.
## Tests and installation (unfinished)
**Note**: The `[[test]]` and `[[install]]` are unfinished features and will likely change in a future release.
# Automatically generated from tests/compile-options/cmake.toml - DO NOT EDIT
layout: default
title: Compiler flags
permalink: /examples/compile-options
parent: Examples
nav_order: 9
---
# Compiler flags
Example project that sets compiler/linker flags for various platforms.
```toml
[project]
name = "compile-options"
description = "Compiler flags"
[target.hello]
type = "executable"
sources = ["src/main.cpp"]
msvc.compile-options = ["/W2"]
gcc.compile-options = ["-Wall"]
clang.compile-options = ["-Wall"]
```
The `hello` target uses [conditions](/cmake-toml#conditions) to set different compiler flags depending on the platform. See the [targets](/cmake-toml/#targets) documentation for other things you can set.
_Note_: In general you only want to specify flags _required_ to compile your code without errors.
<sup><sub>This page was automatically generated from [tests/compile-options/cmake.toml](https://github.com/build-cpp/cmkr/tree/main/tests/compile-options/cmake.toml).</sub></sup>
conditions["gcc"]=R"cmake(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "GNU")cmake";
conditions["clang"]=R"cmake(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "Clang")cmake";
conditions["msvc"]=R"cmake(MSVC)cmake";
conditions["clang"]=
R"cmake((CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$") OR (CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$"))cmake";
conditions["clang-cl"]=
R"cmake((CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$") OR (CMAKE_C_COMPILER_ID MATCHES "Clang" AND CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$"))cmake";
conditions["clang-any"]=R"cmake(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "Clang")cmake";
# Declares an executable target called `basic` with `src/basic.cpp` as a source file. Equivalent to CMake's [add_executable](https://cmake.org/cmake/help/latest/command/add_executable.html)`(basic src/basic.cpp)`.
# Declares an executable target called `basic` with `src/basic.cpp` as a source file. Equivalent to CMake's [add_executable](https://cmake.org/cmake/help/latest/command/add_executable.html)`(basic src/basic.cpp)`.
# Example project that sets compiler/linker flags for various platforms.
[project]
name="compile-options"
description="Compiler flags"
[target.hello]
type="executable"
sources=["src/main.cpp"]
msvc.compile-options=["/W2"]
gcc.compile-options=["-Wall"]
clang.compile-options=["-Wall"]
# The `hello` target uses [conditions](/cmake-toml#conditions) to set different compiler flags depending on the platform. See the [targets](/cmake-toml/#targets) documentation for other things you can set.
# _Note_: In general you only want to specify flags _required_ to compile your code without errors.
# Require a C++11 compiler for the target `example`.
[project]
name="cxx-standard"
description="Changing C++ standard"
[target.example]
type="executable"
sources=["src/main.cpp"]
compile-features=["cxx_std_11"]
# This is equivalent to CMake's [target_compile_features](https://cmake.org/cmake/help/latest/command/target_compile_features.html)`(example PRIVATE cxx_std_11)`. For more information on available C/C++ standards and features see [cmake-compile-features(7)](https://cmake.org/cmake/help/latest/manual/cmake-compile-features.7.html).
# Require a C++11 compiler for the target `example`.
[project]
name="cxx-standard"
description="Changing C++ standard"
[target.example]
type="executable"
sources=["src/main.cpp"]
compile-features=["cxx_std_11"]
# This is equivalent to CMake's [target_compile_features](https://cmake.org/cmake/help/latest/command/target_compile_features.html)`(example PRIVATE cxx_std_11)`. For more information on available C/C++ standards and features see [cmake-compile-features(7)](https://cmake.org/cmake/help/latest/manual/cmake-compile-features.7.html).
# As you can see in the example above you can use `**.ext` to glob recursively and `*.ext` to glob non-recursively. This **does not** generate `file(GLOB ...)` commands, but instead globs when cmkr is run. Files are sorted to give deterministic results regardless of the platform used.
[project]
name="globbing"
description="Globbing sources"
# Recursively glob in the mylib/ folder
[target.mylib]
type="static"
alias="mylib::mylib"
sources=["mylib/**.hpp","mylib/**.cpp"]
include-directories=["mylib/include"]
# Single-folder glob in example/src/
[target.example]
type="executable"
sources=["example/src/*.cpp"]
link-libraries=["mylib::mylib"]
# As you can see in the example above you can use `**.ext` to glob recursively and `*.ext` to glob non-recursively. This **does not** generate `file(GLOB ...)` commands, but instead globs when cmkr is run. Files are sorted to give deterministic results regardless of the platform used.
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