Preprocessor: Add debug dump options #745
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Adds support for GCC's -dD, -dM, -dN flags which enable dumping macro names and/or definitions along with or instead of preprocessor output.
src/aro/Driver.zig
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| m: bool = false, | ||
| n: bool = false, | ||
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| /// Specifying letters whose behavior conflicts is undefined. |
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This could specify that we match clang's behavior.
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Does it actually match clang as it is now? I just chose the current order because it was alphabetical.
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Ok just did a quick check - clang doesn't support -dN; and -dM wins over -dD (it always does -dM regardless of order if -dD and -dM are provided). I'll update it to match that.
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@Vexu Once this is merged, would you be able to sync aro to the main zig repo? I'd like to try updating https://github.com/ziglang/zig/blob/master/tools/generate_linux_syscalls.zig to use aro instead of Is there a technical reason why Zig can't use aro as a |
Sure!
I don't think so as long as bootstrapping doesn't depend on it. I'd ask @andrewrk before trying to get that to work since he tends to have opinions on stuff like that. |
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On second thought - let me see if I can make some progress on #732 before the sync. |
Adds support for GCC's -dD, -dM, -dN flags which enable dumping macro names and/or definitions along with or instead of preprocessor output.
Added a
CHECK_PARTIAL_MATCHoption for preprocessor testing, because the output contains things like__TIME__which is difficult to fit into our existing preprocessor test framework.-dMis also difficult to test extensively with the existing framework because it dumps the output in arbitrary order (just iterates overpp.defines) which seems to match the observed behavior of clang