Including project in CMakeLists.txt

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Автор snorkel, история, 6 лет назад, По-английски

How can I include a header file without writing #include "header.h" for example using cmakelists.txt?

For example without writing #define DEFINE I defined it from cmakelists with the command add_definitions(-DDEFINE)

Can I do the similar thing?

snorkel
6 лет назад
7

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yeputons

6 лет назад, скрыть # |

← Rev. 2 →

Depends on the compiler. E.g. GCC has -include header.h key, see docs.

You can use it in CMakeLists.txt via add_compile_options, e.g. add_compile_options(-include header.h). Note that this will include header.h in each translation unit ("source file") for all targets.

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snorkel

6 лет назад, скрыть # ^ |

This does not work for me. I tried both Cygwin and MinGW.

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yeputons

6 лет назад, скрыть # ^ |

Make sure add_compile_options is specified before add_executable, like this.

Alternatively, use target_compile_options(main PRIVATE -include pre-main.inc.cpp) after add_executable(main main.cpp).

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snorkel

6 лет назад, скрыть # ^ |

← Rev. 3 →

If I write it before add_executable it says header.h: No such file or directory. My Cmake looks like this:

"untitled1" is the project name.

cmake

cmake_minimum_required(VERSION 3.17)
project(untitled1)

set(CMAKE_CXX_STANDARD 17)

if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    add_compile_options(-include header.h)
else()
    error("Only GCC is supported")
endif()

add_executable(untitled1 main.cpp)
target_compile_options(untitled1 PRIVATE -include header.h) #I tried with this line removed too

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purplesyringa

6 лет назад, скрыть # ^ |

So did you try to think why it says 'No such file or directory' if the file exists? Maybe it doesn't know where to find the file? Try specifying the absolute path.

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