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GeezerVison is showing github.com — add sensible constraints for using __MINGW_PRINTF_FORMAT in include/C… by Keith-H-Utron · Pull Request #1896 · cpputest/cpputest

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@Keith-H-Utron

@Keith-H-Utron Keith-H-Utron commented Sep 9, 2026

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…ppUTest/CppUTestConfig.h to silence warnings when building for UCRT64 with autotools

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@Keith-H-Utron
add sensible constraints for using __MINGW_PRINTF_FORMAT in include/C…
bb8b696 
…ppUTest/CppUTestConfig.h to silence warnings when building for UCRT64 with autotools
@Keith-H-Utron Keith-H-Utron mentioned this pull request Sep 9, 2026
Unable to install CppUTest on Windows 11 #1832
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@thetic thetic mentioned this pull request Sep 10, 2026
Only use __MINGW_PRINTF_FORMAT under MinGW ANSI stdio thetic/mu.tiny#104
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thetic added a commit to thetic/mu.tiny that referenced this pull request Sep 10, 2026
@thetic
Only use __MINGW_PRINTF_FORMAT under MinGW ANSI stdio
d056032 
On UCRT-based MinGW builds, __USE_MINGW_ANSI_STDIO defaults to 0,
so __MINGW_PRINTF_FORMAT no longer matches the CRT's printf and
trips format-checking warnings. Restrict it to the classic MinGW
runtime and fall back to plain printf otherwise, matching cpputest/cpputest#1896.

Add a UCRT64 leg to the MSYS CI matrix so this path is covered.

Claude-Session: https://claude.ai/code/session_01AK4HQuuasGpAUvZtortGkH
@Keith-H-Utron

Keith-H-Utron commented Sep 10, 2026

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After more testing, this isn't the right solution. More light was found by reading & testing out the code in Martin Licht's article, The long double trouble with MinGW and Windows, which shows that one has two options for mitigating the problem, and the one I chose here is half-baked. Sorry for that. Closing this PR.
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@Keith-H-Utron Keith-H-Utron closed this Sep 10, 2026
@Keith-H-Utron
Keith-H-Utron deleted the 1832-fix-ucrt64-autotools-warning-__MINGW_PRINTF_FORMAT-is-an-unrecognized-format-function-type branch September 10, 2026 18:03
@basvodde

basvodde commented Sep 10, 2026

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no problem, thanks for contributing anyways!
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@Keith-H-Utron @basvodde
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