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| author | Emil Melnikov <emilmelnikov@users.noreply.github.com> | 2024-05-29 16:04:44 +0200 |
|---|---|---|
| committer | Eli Schwartz <eschwartz93@gmail.com> | 2024-05-31 08:35:28 -0400 |
| commit | 8603bb491925d9cb74f63725e02fab2a0c6fafe1 (patch) | |
| tree | b4a4c30e4c7af13246605d4bde1d8369bcb72ed2 | |
| parent | d9e3a3f09ff82fafab85f1d8631c9e8689850510 (diff) | |
| download | meson-8603bb491925d9cb74f63725e02fab2a0c6fafe1.zip meson-8603bb491925d9cb74f63725e02fab2a0c6fafe1.tar.gz meson-8603bb491925d9cb74f63725e02fab2a0c6fafe1.tar.bz2 | |
Explain how to add preprocessor defines in FAQ.md
See https://github.com/mesonbuild/meson/issues/6269 for the discussion.
Co-authored-by: Eli Schwartz <eschwartz93@gmail.com>
| -rw-r--r-- | docs/markdown/FAQ.md | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/markdown/FAQ.md b/docs/markdown/FAQ.md index ffc9e17..810e9da 100644 --- a/docs/markdown/FAQ.md +++ b/docs/markdown/FAQ.md @@ -695,3 +695,16 @@ directory. It glob ignores ```"*"```, since all generated files should not be checked into git. Users of older versions of Meson may need to set up ignore files themselves. + +## How to add preprocessor defines to a target? + +Just add `-DFOO` to `c_args` or `cpp_args`. This works for all known compilers. + +```meson +mylib = library('mylib', 'mysource.c', c_args: ['-DFOO']) +``` + +Even though [MSVC documentation](https://learn.microsoft.com/en-us/cpp/build/reference/d-preprocessor-definitions) +uses `/D` for preprocessor defines, its [command-line syntax](https://learn.microsoft.com/en-us/cpp/build/reference/compiler-command-line-syntax) +accepts `-` instead of `/`. +It's not necessary to treat preprocessor defines specially in Meson ([GH-6269](https://github.com/mesonbuild/meson/issues/6269#issuecomment-560003922)). |