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13 lines
724 B
13 lines
724 B
6 years ago
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## (C) Preprocessor flag handling
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Meson previously stored `CPPFLAGS` and per-language compilation flags
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separately. (That latter would come from `CFLAGS`, `CXXFLAGS`, etc., along with
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`<lang>_args` options whether specified no the command-line interface (`-D..`),
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`meson.build` (`default_options`), or cross file (`[properties]`).) This was
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mostly unobservable, except for certain preprocessor-only checks like
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`check_header` would only use the preprocessor flags, leading to confusion if
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some `-isystem` was in `CFLAGS` but not `CPPFLAGS`. Now, they are lumped
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together, and `CPPFLAGS`, for the languages which are deemed to care to about,
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is just another source of compilation flags along with the others already
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listed.
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