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129a1319c0
Adds the new option -fdiagnostics-plain-output, which is an alias for
several others:
-fno-diagnostics-show-caret
-fno-diagnostics-show-line-numbers
-fdiagnostics-color=never
-fdiagnostics-urls=never
The idea is that in the future, if the default behavior of diagnostics is
changed to add some fancy feature or other, then the
-fdiagnostics-plain-output option will also be changed accordingly so that
the old behavior is preserved in the presence of this option. This allows
us to use -fdiagnostics-plain-output in in the testsuite, such that the
testsuite (specifically the setting of TEST_ALWAYS_FLAGS in prune.exp)
does not need to be touched whenever diagnostics get a new look. This also
removes the need to add workarounds to compat.exp for every new option
that may be needed in a newer version of the compiler, but is not
supported in older versions.
gcc/ChangeLog:
* common.opt: Add new option -fdiagnostics-plain-output.
* doc/invoke.texi: Document it.
* opts-common.c (decode_cmdline_options_to_array): Implement it.
(decode_cmdline_option): Add missing const qualifier to argv.
libstdc++-v3/ChangeLog:
* testsuite/lib/libstdc++.exp: Use the new option
-fdiagnostics-plain-output.
gcc/testsuite/ChangeLog:
* lib/prune.exp: Change TEST_ALWAYS_FLAGS to use -fdiagnostics-plain-output.
* lib/c-compat.exp: Adapt to the prune.exp change.
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