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tests: Fix some compilation errors with optimizing MSVC.

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* tests/signature.h (DISABLE_INTRINSIC): New macro.
(SIGNATURE_CHECK2): Invoke it.
This commit is contained in:
Bruno Haible
2026-10-17 20:09:38 +02:00
parent 9bce8e202e
commit e0b61efe46
2 changed files with 23 additions and 0 deletions
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ChangeLog
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@@ -1,3 +1,9 @@
2026-10-17 Bruno Haible <bruno@clisp.org>
tests: Fix some compilation errors with optimizing MSVC.
* tests/signature.h (DISABLE_INTRINSIC): New macro.
(SIGNATURE_CHECK2): Invoke it.
2026-10-17 Bruno Haible <bruno@clisp.org>
Fix AC_CHECK_FUNC results with optimizing MSVC.

17
tests/signature.h
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@@ -43,6 +43,23 @@
# define SIGNATURE_CHECK1(fn, ret, args, id) \
SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */
# define SIGNATURE_CHECK2(fn, ret, args, id) \
DISABLE_INTRINSIC (fn) \
_GL_UNUSED static ret (*signature_check ## id) args = fn
# if defined _MSC_VER
/* With MSVC, when intrinsics are enabled (e.g. through option '-O2' without
option '-Oi-'), use of an intrinsic function as an initializer produces an
"error C2099: initializer is not a constant". To avoid this error, disable
this particular intrinsic function.
Documentation:
<https://learn.microsoft.com/en-us/cpp/intrinsics/compiler-intrinsics>
<https://learn.microsoft.com/en-us/cpp/preprocessor/function-c-cpp>
<https://learn.microsoft.com/en-us/cpp/preprocessor/warning>
<https://learn.microsoft.com/en-us/cpp/preprocessor/pragma-directives-and-the-pragma-keyword> */
# define DISABLE_INTRINSIC(fn) \
__pragma (warning (suppress : 4163)) \
__pragma (function (fn))
# else
# define DISABLE_INTRINSIC(fn)
# endif
#endif /* SIGNATURE_CHECK */