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Disable -Wreturn-type-c-linkage under clang-cl

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clang-cl defines both __clang__ and _MSC_VER, yet uses `#pragma GCC` to disable certain diagnostics.

At the time `-Wreturn-type-c-linkage` was reported by clang-cl.
This PR fixes this behavior by reordering defines.
This commit is contained in:
Yuriy Chernyshov 2022-01-24 11:23:34 +03:00 committed by Yuriy Chernyshov
parent 3f2377017c
commit d1b533d399
1 changed files with 8 additions and 5 deletions
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13
modules/core/include/opencv2/core/core_c.h
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@ -48,16 +48,19 @@
#include "opencv2/core/types_c.h"
#ifdef __cplusplus
# ifdef _MSC_VER
/* disable warning C4190: 'function' has C-linkage specified, but returns UDT 'typename'
which is incompatible with C
/* disable MSVC warning C4190 / clang-cl -Wreturn-type-c-linkage:
'function' has C-linkage specified, but returns UDT 'typename'
which is incompatible with C
It is OK to disable it because we only extend few plain structures with
C++ constructors for simpler interoperability with C++ API of the library
*/
# pragma warning(disable:4190)
# elif defined __clang__ && __clang_major__ >= 3
# if defined(__clang__)
// handle clang on Linux and clang-cl (i. e. clang on Windows) first
# pragma GCC diagnostic ignored "-Wreturn-type-c-linkage"
# elif defined(_MSC_VER)
// then handle MSVC
# pragma warning(disable:4190)
# endif
#endif