configure: set classic mingw minimum OS version to XP #7581
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- If the user has not specified a minimum OS version (via WINVER or _WIN32_WINNT macros) then set it to Windows XP. Prior to this change classic MinGW defaulted the minimum OS version to Windows NT 4.0 which is way too old. At least Windows XP is needed for getaddrinfo (which resolves hostnames to IPv6 addresses). Ref: curl#7483 (comment) Closes #xxxx
MarcelRaad
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Aug 17, 2021
vszakats
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to vszakats/curl
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Aug 26, 2024
Originall added in 37f1c21 curl#7581 for classic mingw. curl no longer supports building with classic mingw. Ref: curl#12684 Ref: curl#12606 (comment)
vszakats
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Aug 27, 2024
1. GHA/windows: enable WinIDN in Linux cross-builds.
(to reveal the issue in CI.)
2. fix compiler warning when building with mingw-w64 supporting
WinIDN, while targeting pre-Vista Windows, with a `WINVER` set to
target Vista or newer. (Such was Ubuntu's mingw-w64 with the
classic-mingw-specific trick in point 3 of this PR.)
```
../../lib/idn.c:154:23: error: redundant redeclaration of ‘IdnToAscii’ [-Werror=redundant-decls]
154 | WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
| ^~~~~~~~~~
In file included from /usr/share/mingw-w64/include/windows.h:73,
from /usr/share/mingw-w64/include/winsock2.h:23,
from ../../lib/setup-win32.h:91,
from ../../lib/curl_setup.h:308,
from ../../lib/idn.c:29:
/usr/share/mingw-w64/include/winnls.h:1075:30: note: previous declaration of ‘IdnToAscii’ was here
1075 | WINNORMALIZEAPI int WINAPI IdnToAscii (DWORD dwFlags, LPCWSTR lpUnicodeCharStr, int cchUnicodeChar, LPWSTR lpASCIICharStr, int cchASCIIChar);
| ^~~~~~~~~~
[...same for IdnToUnicode...]
```
Ref: https://github.com/curl/curl/actions/runs/10542832783/job/29210098553#step:7:89
3. drop `WINVER` override for classic-mingw. curl no longer supports
building with classic-mingw.
Reverts 37f1c21 #7581
4. sync `if IdnToUnicode can be linked` detection snippet with the live
code in `lib/idn.c`. It fixes detection for the scenario in point 2.
5. delete unused `WINIDN_DIR` variable.
Bug: #12606 (comment)
Previous abandoned attempt: #12684
Reviewed-by: Jay Satiro
Closes #14680
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_WIN32_WINNT macros) then set it to Windows XP.
Prior to this change classic MinGW defaulted the minimum OS version
to Windows NT 4.0 which is way too old. At least Windows XP is needed
for getaddrinfo (which resolves hostnames to IPv6 addresses).
Ref: #7483 (comment)
Closes #xxxx
/cc @mback2k