[pull] master from curl:master #669
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So that curl_easy_setopt() correctly returns error for those not supported by the backend. Closes #20364
Reduce mentions of libcurl versions like "since 7.xx ..." in option descriptions to reduce clutter and make the texts easier to read. Keep them in, or move them to, the HISTORY or DEPRECATED sections The last version 7 release (7.88.1) shipped on Februrary 20, 2023. Closes #20369
- whitespace, indent, comments, clang-format. - openssl: move feature guards within function blocks. - tunit: drop redundant blocks. Closes #20361
```
lib/rtsp.c:1073:26: error: no previous extern declaration for non-static variable 'Curl_scheme_rtsp' [-Werror,-Wmissing-variable-declarations]
1073 | const struct Curl_scheme Curl_scheme_rtsp = {
| ^
lib/rtsp.c:1073:7: note: declare 'static' if the variable is not intended to be used outside of this translation unit
1073 | const struct Curl_scheme Curl_scheme_rtsp = {
| ^
```
Ref: https://github.com/curl/trurl/actions/runs/21157411659/job/60844860592?pr=425#step:3:3036
Follow-up to 8edc033 #20351
Closes #20365
Extend two existing local suppressions to GCC, and add another
GCC-specific one as a replacement.
Before this patch suppressing this warning was odd with clang, because
after this option, `-Wformat=2` is used, which re-enables it.
Also:
- mprintf: minimize scope of a warning suppression.
- tests/server: suppress this warning for a system `vsnprintf()` call
where it could trigger in C89 builds or with
`CFLAGS=-DCURL_NO_FMT_CHECKS` set. Seen with Apple clang 17:
```
curl/tests/server/util.c:114:37: warning: format string is not a string literal [-Wformat-nonliteral]
114 | vsnprintf(buffer, sizeof(buffer), msg, ap);
| ^~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/secure/_stdio.h:124:69: note: expanded from macro 'vsnprintf'
124 | #define vsnprintf(str, len, ...) __vsnprintf_chk_func (str, len, 0, __VA_ARGS__)
| ^~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/secure/_stdio.h:81:65: note: expanded from macro '__vsnprintf_chk_func'
81 | __builtin___vsnprintf_chk (str, len, flag, __darwin_obsz(str), format, ap)
| ^~~~~~
```
Ref: #20363
Closes #20366
- `stdbool.h` is also included via system headers. Disabling it from curl
does not fix it. Silencing lots of these:
```
curl/lib/curlx/warnless.h:64:1: warning: '_Bool' is a C99 extension [-Wc99-extensions]
64 | bool curlx_sztouz(ssize_t sznum, size_t *puznum);
| ^
/Library/Developer/CommandLineTools/usr/lib/clang/17/include/stdbool.h:24:14: note: expanded from macro 'bool'
24 | #define bool _Bool
| ^
```
- silence `-Wcomma` warnings.
in favor of the global silencing approach, since a couple of more of
these were hit (in vquic, tool1622, unit1309, unit1636), and it seems
silly to update them all.
Revert e8189c4 #20362
Also:
- cmake: include C standard in 'platform flags' log line.
- GHA/macos: switch a job to C89 to verify.
- GHA/linux: show 'C89' in job names.
Ref: https://cmake.org/cmake/help/v3.7/variable/CMAKE_C_STANDARD.html
Closes #20363
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