Commit Graph

7 Commits

Author SHA1 Message Date
Fangrui Song 83ea47acd7 [test] Make tests pass regardless of gnu++14/gnu++17 default
GCC from 11 onwards defaults to -std=gnu++17 for C++ source files. We want to do the same
(https://discourse.llvm.org/t/c-objc-switch-to-gnu-17-as-the-default-dialect/64360).
Split RUN lines, adjust `-verify`, or add `__cplusplus < 201703L` or `-Wno-dynamic-exception-spec`,
so that tests will pass regardless of gnu++14/gnu++17 default.

We have a desire to mark a test compatible with multiple language standards.
There are ongoing discussions how to add markers in the long term:

* https://discourse.llvm.org/t/iterating-lit-run-lines/62596
* https://discourse.llvm.org/t/lit-run-a-run-line-multiple-times-with-different-replacements/64932

As a workaround in the short term, add lit substitutions `%std_cxx98-`,
`%std_cxx11-14`, etc. They can be used for tests which work across multiple
language standards. If a range has `n` standards, run lit multiple times, with
`LIT_CLANG_STD_GROUP=0`, `LIT_CLANG_STD_GROUP=1`, etc to cover all `n` standards.

Reviewed By: #clang-language-wg, aaron.ballman

Differential Revision: https://reviews.llvm.org/D131464
2022-09-04 05:29:32 +00:00
Charles Li 85dec55989 [Lit Test] Updated 20 Lit tests to be C++11 compatible.
This is the 5th Lit test patch.
Expanded expected diagnostics to vary by C++ dialect.
Expanded RUN line to: default, C++98/03 and C++11.

llvm-svn: 255196
2015-12-10 01:07:17 +00:00
Richard Smith e334c01773 Move the C++11 ExtWarn for converting a string literal to 'char*' out of
-Wc++11-compat-deprecated-writable-strings. It's neither a C++11 compatibility
warning nor a deprecated feature, it's just ill-formed.

In passing, add that warning to -Wdeprecated, where it belongs.

llvm-svn: 206833
2014-04-22 01:11:06 +00:00
Richard Smith d3d5c3300e Add -Wdeprecated-writable-string in C++ to -Wc++11-compat, since it's ill-formed in C++11.
llvm-svn: 194736
2013-11-14 22:22:31 +00:00
Chandler Carruth 153329dad7 GCC overloads -Wwrite-strings just to make it extra confusing. While it
changes language semantics in C and ObjC (which Clang has supported for
a while), in C++ it's the name used for Clang's
-Wdeprecated-writable-strings.

Clang's name is at least less overloaded if still confusing (the string
isn't writable, we just allow converting to a non-const pointer without
warning), so I've left it in place and made the GCC name an alias for
compatibility.

With this I've implemented all the aspects of GCC's -Wwrite-strings I've
encountered which didn't work with Clang.

llvm-svn: 130052
2011-04-23 06:54:44 +00:00
Douglas Gregor e981bb0e5c -fwritable-strings should silence warnings about the deprecated string
-literal to char* conversion. Make it so.

llvm-svn: 127586
2011-03-14 16:13:32 +00:00
Fariborz Jahanian b5b7e9088b Put warning about makeing a string writable into
its own deprecated diagnostics group so it can be
turned off selectively. // rdar://8827606

llvm-svn: 122967
2011-01-06 18:45:19 +00:00