#14345: Warning when linking with C++ code -------------------------------------+------------------------------------- Reporter: crockeea | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by crockeea: Old description:
When linking with a C++ file, GHC 8.2.1.20170928 produces a warning because it runs gcc with 'std=gnu99', even when I pass 'std=c++11' to cc- options (when using stack, I see that the command is something like 'gcc std=gnu99 ... std=c++11', so it isn't *ignoring* my input, just appending it.) I believe this warning is new as of 8.2.
The attached example demonstrates the problem:
{{{
cabal configure cabal build cc1plus: warning: command line option ‘-std=gnu99’ is valid for C/ObjC but not for C++ cc1plus: warning: command line option ‘-std=gnu99’ is valid for C/ObjC but not for C++ }}}
New description: When linking with a C++ file, GHC 8.2.1.20170928 produces a warning because it runs gcc with 'std=gnu99', even when I pass 'std=c++11' to cc- options (when using stack with `-v3`, I see that the command is something like `gcc std=gnu99 ... std=c++11`, so it isn't *ignoring* my input, just appending it.) I believe this warning is new as of 8.2. The attached example demonstrates the problem: {{{
cabal configure cabal build cc1plus: warning: command line option ‘-std=gnu99’ is valid for C/ObjC but not for C++ cc1plus: warning: command line option ‘-std=gnu99’ is valid for C/ObjC but not for C++ }}}
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