Support the -std=<standard> command-line option #456
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Activation and deactivation of a given warning, plus set-as-error and remove-as-error.
…rg>` Also: use `int_of_string_opt` instead of `int_of_string` for slightly cleaner code.
bschommer
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Sep 21, 2022
It has two effects:
- With a GNU toolchain, it's passed down to the preprocessor.
This influences the contents of standard includes.
- It determines the default effect of the "C11 feature" warning:
-std=c99: warn on the use of C11 features
-std=c11 or -std=c18: don't warn
For backward compatiblity, the default, if no `-std` option is given,
is to not warn, but to pass `-std=c99` to the preprocessor.
Co-authored-by: Bernhard Schommer <bschommer@users.noreply.github.com>
The correct -std option is now added by ccomp itself.
Just like in the other test/ directories.
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It has two effects:
- With a GNU toolchain, it's passed down to the preprocessor.
This influences the contents of standard includes.
- It determines the default effect of the "C11 feature" warning:
-std=c99: warn on the use of C11 features
-std=c11 or -std=c18: don't warn
For backward compatiblity, the default, if no `-std` option is given,
is to not warn, but to pass `-std=c99` to the preprocessor.
Co-authored-by: Bernhard Schommer <bschommer@users.noreply.github.com>
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This PR adds a
-stdcommand-line option similar to those of GCC and Clang.Currently three values are supported:
-std=c99,-std=c11and-std=c18.The option has two effects:
-std=c99, CompCert warns on the use of C11 features; with-std=c11or-std=c18, no warnings are emitted.For backward compatibility with CompCert's current behavior, if no
-stdoption is given, the default is to not warn, but-std=c99is passed to the preprocessor. This may change in the future, when C11 will become the default instead of C99.