build: fix clang-cl builds, add CI job

- appveyor: add build-only job for clang-cl.

- cmake: `-pedantic-errors` enables `-Werror,-Wlanguage-extension-token`
automatically, whi

build: fix clang-cl builds, add CI job

- appveyor: add build-only job for clang-cl.

- cmake: `-pedantic-errors` enables `-Werror,-Wlanguage-extension-token`
automatically, which makes `__int64` detection fail.
Explictly disable this compiler warning for clang-cl to make the
feature detection work and to accept `__int64` in the source code.

- cmake: disable `-Wlanguage-extension-token` warning for clang-cl
to fix these when encountering `__int64`:
```
lib/formdata.c(797,29): error : extension used [-Werror,-Wlanguage-extension-token]
lib/warnless.c(117,33): error : extension used [-Werror,-Wlanguage-extension-token]
lib/warnless.c(60,28): message : expanded from macro 'CURL_MASK_SCOFFT'
lib/warnless.c(59,38): message : expanded from macro 'CURL_MASK_UCOFFT'
include\curl/system.h(352,40): message : expanded from macro 'CURL_TYPEOF_CURL_OFF_T'
```

- make `__GNUC__` warning suppressions apply to `__clang__` too.
Necessary for clang-cl, which defines the latter, but not the former.
(Regular clang defines both.)

- examples: fix clang-cl compiler warning in `http2-upload.c`.
```
docs\examples\http2-upload.c(56,5): error : no previous prototype for function 'my_gettimeofday' [-Werror,-Wmissing-prototypes]
docs\examples\http2-upload.c(56,1): message : declare 'static' if the function is not intended to be used outside of this translation unit
```

- unit2604: add missing `#pragma GCC diagnostic pop`.
Follow-up to e53523fef07894991c69d907a7c7794c7ada4ff4 #14859

- unit1652: limit compiler warning suppression to GCC.
They do not affect clang builds.
Follow-up to 71cf0d1fca9e1f53524e1545ef0c08d174458d80 #14772

Closes #15449

show more ...

appveyor: fix job names, tidy-up

- add 'Shared' to job names where missing.
- dedupe setting the default `HTTP_ONLY` env.
- fix typo in job name.

Cherry-picked from #15414

appveyor: fix job names, tidy-up

- add 'Shared' to job names where missing.
- dedupe setting the default `HTTP_ONLY` env.
- fix typo in job name.

Cherry-picked from #15414
Closes #15422

show more ...

appveyor: bump to OpenSSL 3.3

Closes #15085

appveyor: delete unused WebSockets option remains [ci skip]

tests: speed up builds with single-binary test bundles

Add support for single-block binaries that contain all libtests and
unit tests respectively.

Enable with:
- autotools:

tests: speed up builds with single-binary test bundles

Add support for single-block binaries that contain all libtests and
unit tests respectively.

Enable with:
- autotools: `--enable-test-bundles`
- cmake: `-DCURL_TEST_BUNDLES=ON`

(They are compatible with `--enable-unity` and `-DCMAKE_UNITY_BUILD=ON`
options, for further speed-up.)

Makes libtests and unit tests build _fast_, needing little disk space
even in static mode. Similar to CMake unity mode, but with a custom
script, also supporting autotools builds.

The price is having to deal with symbols/macros colliding between
`lib*.c` and `unit*.c` sources. Maybe with naming conventions or other
solutions this can be improved gradually and reduce the need for manual
intervention by `mk-bundle.mk`. I've included a script that does the bulk
of detecting name collisions.

Also:
- CI: enable test bundles.
- CI: build tests in more jobs.
- lib2305: fix FILE handle leak.
- unit1661: fix memleak found by torture test by releasing the `bufref`
structure in `unit_stop()` that was allocated in `unit_setup()`.
```
test 1661...[bufref unit tests]
Leak detected: memory still allocated: 13 bytes
allocated by /home/runner/work/curl/curl/tests/unit/unit1661.c:70
1661: torture FAILED: function number 1 in test.
```
Ref: https://github.com/curl/curl/actions/runs/10967279334/job/30456745290?pr=14772#step:8:41

Similar test suite builds with autotools default and cmake+bundle+unity:
- GHA/Linux: 33s vs 7s
https://github.com/curl/curl/actions/runs/10705668823/job/29681617374
- GHA/macOS 34s vs 2s
https://github.com/curl/curl/actions/runs/10705668813/job/29681632885
- GHA/FreeBSD: 15m25 vs 6m21 (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10705668811/job/29681607915
- GHA/Cygwin: 9m52 vs 32s
https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 3m52 vs 14s
https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 5m45 vs 30s
https://github.com/curl/curl/actions/runs/10705668808/job/29681628787

Autotools test suite builds compared between master -> `--enable-test-bundles`:
- GHA/Linux: 33s -> 9s (run tests: 22m23 -> 20m44)
https://github.com/curl/curl/actions/runs/10710030193/job/29695932185
https://github.com/curl/curl/actions/runs/10967831456/job/30458220344
- GHA/macOS: 25s -> 4s (run tests: 2m58 -> 2m24)
https://github.com/curl/curl/actions/runs/10710030195/job/29695938444
https://github.com/curl/curl/actions/runs/10967831452/job/30458225762
- GHA/non-native (FreeBSD): 4m8 -> 3m12 (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10710030198/job/29695928401
https://github.com/curl/curl/actions/runs/10967831458/job/30458212692
- GHA/Cygwin: 9m25 -> 1m9 (run tests: 9m19 -> 3m28)
https://github.com/curl/curl/actions/runs/10710030212/job/29695928213
https://github.com/curl/curl/actions/runs/10967831453/job/30458213268
- GHA/MSYS2: 3m54 -> 32s (run tests: 6m3 -> 3m59)
https://github.com/curl/curl/actions/runs/10710030190/job/29704850591
https://github.com/curl/curl/actions/runs/10967831449/job/30459280005
- GHA/mingw-w64: 5m42 -> 1m5 (run tests: 7m41 -> 5m36)
https://github.com/curl/curl/actions/runs/10710030190/job/29704852058
https://github.com/curl/curl/actions/runs/10967831449/job/30459280862
- Azure MSYS2 mingw64 openssl: 38m55 -> 11m58
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
- Azure Ubuntu default: 2m15 -> 55s (all build)
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7

Cmake test suite builds compared between master -> `-DCURL_TEST_BUNDLES=ON` + unity:
- GHA/Linux: 29s -> 7s (run tests: 4m50 -> 4m57, 20m43 -> 20m45)
https://github.com/curl/curl/actions/runs/10710030193/job/29695941814
https://github.com/curl/curl/actions/runs/10705668823/job/29681622201
- GHA/Linux old: 44s -> 13s (bundle+no unity) (run tests: 5m5 -> 5m6)
https://github.com/curl/curl/actions/runs/10718264094/job/29719794727
https://github.com/curl/curl/actions/runs/10718653175/job/29721009613
- GHA/macOS: 32s -> 2s (run tests: 2m43 -> 2m40)
https://github.com/curl/curl/actions/runs/10710030195/job/29695931956
https://github.com/curl/curl/actions/runs/10705668813/job/29681638937
- GHA/non-native (*BSD): inconclusive (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10710030198
https://github.com/curl/curl/actions/runs/10705668811
- GHA/Cygwin: 3m9 -> 32s
https://github.com/curl/curl/actions/runs/10710030212/job/29695929075
https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 2m24 -> 14s
https://github.com/curl/curl/actions/runs/10710030190/job/29704850996
https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 3m56 -> 30s (run tests: 4m2 -> 3m52)
https://github.com/curl/curl/actions/runs/10710030190/job/29704852219
https://github.com/curl/curl/actions/runs/10705668808/job/29681631393
- GHA/mingw-w64-old: 7m19 -> 1m44 (run tests: 3m30 -> 2m53)
https://github.com/curl/curl/actions/runs/10710030190/job/29704849763
https://github.com/curl/curl/actions/runs/10705668808/job/29681622329
- GHA/MSVC: 3m22 -> 13s (run tests: 9m43 -> 4m22)
https://github.com/curl/curl/actions/runs/10710030190/job/29704850411
https://github.com/curl/curl/actions/runs/10705668808/job/29681623313
- AppVeyor CI MSVC 2008: 4m3 -> 45s (full build)
- AppVeyor CI MSVC 2010: 2m56 -> 1m8 (full build)
- AppVeyor CI MSVC 2022: 10m19 -> 2m23 (full build)
https://ci.appveyor.com/project/curlorg/curl/builds/50538455
https://ci.appveyor.com/project/curlorg/curl/builds/50536558
- AppVeyor CI total build time: 10m30 (master) -> 6m48 (unity) -> 4m5 (bundle) -> 3m24 (bundle+unity) -> 5m7 (bundle+unity+all jobs building tests)

Closes #14772

show more ...

cmake: separate target for examples, optimize CI, fix fallouts

- Move `docs/examples` builds under a separate target.

- Make `BUILD_EXAMPLES` default to `ON`. It means to generate t

cmake: separate target for examples, optimize CI, fix fallouts

- Move `docs/examples` builds under a separate target.

- Make `BUILD_EXAMPLES` default to `ON`. It means to generate the rules
for `docs/examples` by default, but not build them. To build them,
an explicit `make curl-examples` (or ninja, etc) command is necessary.
This syncs behaviour with autotools, and also how both cmake and
autotools are building tests.

- GHA: update cmake jobs to use the new way of building examples.

- GHA: move examples build step at the end of the job, after building
and running tests. This allows to have build and test run results
faster, and leave the seldom-changing examples build to the end.
Building examples is the slowest build step with no practical way to
make them fast.

- appveyor: enable building examples in two old-MSVC jobs.

- examples: fix examples to build cleanly with old MSVC versions.

- GHA/non-native: move example build log under a GHA foldable section.

- GHA/windows: move building examples into separate step for Linux cross
jobs.

Follow-up to dfdd978f7c60224dffe2aac25b436dc0a5cd0186 #13491
Closes #14906

show more ...

CI: move Azure jobs to GHA, fix fallouts, sshserver, runtests tweaks

CI:

- GHA/windows: enable OpenSSH server, SysInternals `handle`, `impacket`.
Skip `impacket` on MSYS2 due

CI: move Azure jobs to GHA, fix fallouts, sshserver, runtests tweaks

CI:

- GHA/windows: enable OpenSSH server, SysInternals `handle`, `impacket`.
Skip `impacket` on MSYS2 due to install failure.
Skip OpenSSH server for old/standalone mingw-w64 (building curl
without SSH there.)
- GHA/windows: make test tool installs a separate step.
- GHA/cygwin: enable OpenSSH server.
Skip `impacket`: it's compiling for 7 minutes then breaks.
Skip `stunnel` due to sluggish test run performance.
(This update is unrelated to Azure jobs.)
- GHA/linux: migrate Linux jobs from Azure CI.
- GHA/linux: migrate scanbuild job from Azure CI.
- GHA/linux: enable libssh2 in a job. Also enable valgrind.
- CI/windows: enable SSPI in two jobs.
- CI/windows: disable zlib in one more job.
- CI/windows: improve `if` condition checking GnuTLS.
- CI/windows: ignore SFTP/SCP tests as necessary.
- universally ignore SCP tests, they fail everywhere.
- ignore test 612.
- ignore test 613 616 618 with MSYS2 mingw-w64.
- ignore test 614 with libssh.
- ignore all SFTP with MSYS2 native.
- ignore all SFTP with vcpkg with `libssh2[core,zlib]`.
- ignore a couple of SFTP tests with MSYS2 mingw-w64.
(This matches settings on Azure CI.)
- GHA/windows: ignore failing 1451 'Basic SMB request' test for
old mingw-w64 7.3.0 (but not for 9.5.0!):
```
2024-09-11 21:45:59,738 ERROR smbComNegotiate: b'NT LM 0.12\x00' is not in list
[...]
curl: (7) Could not connect to server
[...]
FAIL 1451: 'Basic SMB request' SMB
```
Ref: https://github.com/curl/curl/actions/runs/10816280746/job/30007130770#step:13:3546
- CI/Azure: delete, now moved to GHA.

sshserver:

- sshserver: fix permissions for SSH host key on Windows, allowing sshd
to launch.
- sshserver: fix initializing config paths with Cygwin/MSYS2 sshd.
- sshserver: fix initializing config paths in parallel builds.
- sshserver: delete redundant `DenyUsers`. This also opens the way
to allow multiple usernames.
- sshserver: fix `AllowUsers` for GHA/windows, by allowing the
domainless username again.
Follow-up to 3ee7c676ec8ef32e3a9cb4d0fb2929a8335d58db #5721
- sshserver: fix `Deprecated option` warnings in `sshd_config`:
```
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 7: Deprecated option AuthorizedKeysFile2
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 25: Deprecated option KeyRegenerationInterval
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 35: Deprecated option RhostsRSAAuthentication
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 36: Deprecated option RSAAuthentication
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 37: Deprecated option ServerKeyBits
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 41: Deprecated option UseLogin
```
- sshserver: fix `Deprecated option` warnings in `ssh_config` with
Cygwin/MSYS2.
- sshserver: fix dumping config files due to the filenames missing their
full paths.
- sshserver: add workaround to make `logmsg` messages visible.
Before this patch they only went to a file and never shown.

runtests:

- runtests: log details when these Windows commands are called:
`handle`, `taskkill`, `tasklist`.
- runtests: add documentation links to Windows tools:
`handle`, `taskkill`, `tasklist`, `icacls`.
- runtests: add `-t` (kill whole tree) option to `taskkill` in
`servers.pm`, syncing it with the other `taskkill` call.
Follow-up to bc72a78a11764558639131d51fa8e7c81ee1e113 #14488
- runtests: show warning if Sysinternals `handle` tool is missing.
- runtests: drop Windows XP Home compatibility `tskill` call.
The call was made on all Windows versions. It's possibly overkill to
do this, because XP Home is probably rarely used for running curl
tests these days. In case it's needed, it'd be better to put it under
an explicit option.
- runtests: show Perl version and path.

Fix/silence fallouts:

- unit2603: fix building with disabled HTTP support.
- unit2604: silence `-Woverlength-strings` warnings in C89 mode.
- test437, test1614: fix to pass with no-IPv6 builds.

Closes #14859

show more ...

CI: update names of jobs that are now building tests [ci skip]

Follow-up to d620ec67913b2c4be25e7d72f1933f0a8a3e0a2e #14700

CI: add test timeouts, more cmake build tests, fix VS2010 C warning

- GHA/macos: set timeout for test runs.
Double the value for autotools to fit torture tests.
- GHA/cygwin: reduc

CI: add test timeouts, more cmake build tests, fix VS2010 C warning

- GHA/macos: set timeout for test runs.
Double the value for autotools to fit torture tests.
- GHA/cygwin: reduce test run timeout for autotools.
- GHA/cygwin: enable building tests with cmake.
- GHA/windows: enable building tests with MSYS cmake.
- GHA/windows: enable building tests with MSVC UWP.
- appveyor: enable building tests with VS2008 x86 and VS2010 x64.
- tests: add workaround compiler warnings when building with VS2010:
```
tests\server\util.c(482): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(486): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(490): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(720): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(726): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(732): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(781): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(785): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(789): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/50485633/job/4ujlwxod3cexmn2q#L1535

With this, tests are built in all GHA cygwin/windows jobs.

Timeouts avoid long runs with runaway issues, example:
https://github.com/curl/curl/actions/runs/10575522173

Closes #14700

show more ...

appveyor: drop uploading artifacts

Uploading artifacts sometimes results in this error:
```
Uploading artifacts...
[1/1] _bld\src\curl.exe (2,022,912 bytes)...100%
Error uplo

appveyor: drop uploading artifacts

Uploading artifacts sometimes results in this error:
```
Uploading artifacts...
[1/1] _bld\src\curl.exe (2,022,912 bytes)...100%
Error uploading artifact to the storage: Remote server returned 503: Service Temporarily Unavailable
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/50424126/job/e4envval6xkicv1i#L123

The artifacts are also probably not useful to upload for every run. Also
note that they were missing external DLL dependencies.

Leave the logic there commented, to make it easy to enable as needed for
debugging or testing artifacts locally.

Closes #14581

show more ...

GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI

- run tests via `make test-ci` instead of `make check` with autotools.
- add `x86_64` job for FreeBSD, with test

GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI

- run tests via `make test-ci` instead of `make check` with autotools.
- add `x86_64` job for FreeBSD, with tests.
It matches the existing Cirrus CI job, with these differences:
- finishes 3x faster (thanks to parallel tests enabled).
- librtmp is not enabled because it's slated for removal by FreeBSD.
(already past the removal deadline, thought the package still
installs.)
- DICT and TELNET servers fail to start. Couldn't figure out why.
It means skipping test 1450 and 1452.
- it runs more tests, e.g. websockets and ip6-localhost.
- no `pkg update -f`.
- it misses the `CRYPTOGRAPHY_DONT_BUILD_RUST=1`, `pkg delete curl`,
`chmod 777`, `sudo -u nobody` and `sysctl net.inet.tcp.blackhole`
tricks. The latter is the default in these runners, the others did
not affect results.
- set `-j0` for tests in the NetBSD job. Flaky otherwise.

Closes #14244

show more ...

build: untangle `CURLDEBUG` and `DEBUGBUILD` macros

`CURLDEBUG` is meant to enable memory tracking, but in a bunch of cases,
it was protecting debug features that were supposed to be gua

build: untangle `CURLDEBUG` and `DEBUGBUILD` macros

`CURLDEBUG` is meant to enable memory tracking, but in a bunch of cases,
it was protecting debug features that were supposed to be guarded with
`DEBUGBUILD`.

Replace these uses with `DEBUGBUILD`.

This leaves `CURLDEBUG` uses solely for its intended purpose: to enable
the memory tracking debug feature.

Also:
- autotools: rely on `DEBUGBUILD` to enable `checksrc`.
Instead of `CURLDEBUG`, which worked in most cases because debug
builds enable `CURLDEBUG` by default, but it's not accurate.
- include `lib/easyif.h` instead of keeping a copy of a declaration.
- add CI test jobs for the build issues discovered.

Ref: https://github.com/curl/curl/pull/13694#issuecomment-2120311894
Closes #13718

show more ...

appveyor: fixup job name [ci skip]

Follow-up to fc8e0dee3045658f293452121f5290d81ba3aa1e #13694

build: untangle `UNITTESTS` and `DEBUGBUILD` macros

- fix `DEBUGBUILD` guards that should be `UNITTESTS`, in libcurl code
used by unit tests.
- fix guards for libcurl functions use

build: untangle `UNITTESTS` and `DEBUGBUILD` macros

- fix `DEBUGBUILD` guards that should be `UNITTESTS`, in libcurl code
used by unit tests.
- fix guards for libcurl functions used in unit tests only.
- sync `UNITTEST` attribute between declarations and definitions.
- drop `DEBUGBUILD` guard from test `unit2600`.
- fix guards for libcurl HSTS code used by both a unit test (`unit1660`)
and `test0446`.
- update an existing AppVeyor CI job to test the issues fixed.

This fixes building tests with `CURLDEBUG` enabled but `DEBUGBUILD`
disabled. This can happen when building tests with CMake with
`ENABLE_DEBUG=ON` in Release config, or with `ENABLE_CURLDEBUG=ON`
and _without_ `ENABLE_DEBUG=ON`. Possibly also with autotools
when using `--enable-curldebug` without `--enable-debug`.

Test results:
- before:
https://ci.appveyor.com/project/curlorg/curl/builds/49835609
https://ci.appveyor.com/project/curlorg/curl/builds/49898529/job/k8qpbs8idby70smw
https://github.com/curl/curl/actions/runs/9259078835/job/25470318167?pr=13798#step:13:821
- after: https://ci.appveyor.com/project/curlorg/curl/builds/49839255
(the two failures are unrelated, subject to PR #13705)

Ref: #13592 (issue discovery)
Ref: #13689 (CI testing this PR with `DEBUGBUILD`/`CURLDEBUG` combinations)
Closes #13694

show more ...

CI: tidy up skipping tests build/run in Windows jobs

Simplify controlling whether to build and/run tests in a CI job.

Apply the TFLAGS='skipall' (do not build nor run tests) or

CI: tidy up skipping tests build/run in Windows jobs

Simplify controlling whether to build and/run tests in a CI job.

Apply the TFLAGS='skipall' (do not build nor run tests) or
'skiprun' (build, but do not run) method already used with old-mingw-w64
and msvc jobs to existing Windows jobs in GHA and AppVeyor.

Also:
- add Cygwin/cmake test build and run steps while here.
- replace `DISABLED_TESTS` with `TFLAGS` in AppVeyor.

Closes #13796

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cmake: `ENABLE_DEBUG=ON` to always set `-DDEBUGBUILD`

Before this patch `ENABLE_DEBUG=ON` always enabled the TrackMemory
(aka `ENABLE_CURLDEBUG=ON`) feature, but required the `Debug` CMa

cmake: `ENABLE_DEBUG=ON` to always set `-DDEBUGBUILD`

Before this patch `ENABLE_DEBUG=ON` always enabled the TrackMemory
(aka `ENABLE_CURLDEBUG=ON`) feature, but required the `Debug` CMake
configration to actually enable curl debug features
(aka `-DDEBUGBUILD`).

Curl debug features do not require compiling with C debug options. This
also made enabling debug features unintuitive and complicated to use.
Due to other issues (subject to PR #13694) it also caused an error in
default (and `Release`/`MinSizeRel`/`RelWithDebInfo`) configs, when
building the `testdeps` target:
```
ld: CMakeFiles/unit1395.dir/unit1395.c.o: in function `test':
unit1395.c:(.text+0x1a0): undefined reference to `dedotdotify'
```
Ref: https://github.com/curl/curl/actions/runs/9037287098/job/24835990826#step:3:2483

Fix it by always defining `DEBUGBUILD` when setting `ENABLE_DEBUG=ON`.
Decoupling this option from the selected CMake configuration.

Note that after this patch `ENABLE_DEBUG=ON` unconditionally enables
curl debug features. These features are insecure and unsuited for
production. Make sure to omit this option when building for production
in default, `Release` (and other not-`Debug`) modes.

Also delete a workaround no longer necessary in GHA CI jobs.

Ref: 1a62b6e68c08c7e471ff22dd92932aba7e026817 (2015-03-03)
Ref: #13583
Closes #13592

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GHA: add three MSVC jobs

Continuing the theme, add 3 MSVC jobs with tests, matching
configurations used on AppVeyor. MSVC versions are identical:
19.39.33523.0 + Windows SDK 10.0.226

GHA: add three MSVC jobs

Continuing the theme, add 3 MSVC jobs with tests, matching
configurations used on AppVeyor. MSVC versions are identical:
19.39.33523.0 + Windows SDK 10.0.22621.0.

Also enable websockets, and build examples. Tests are run in parallel
(`-j14`), with improved performance.

Job performance:
```
AppVeyor GHA
w/examples
-------- ----------
CMake, VS2022, Debug, x64, Schannel, Static, Unicode 38m 4s 11m57s
CMake, VS2022, Debug, x64, no SSL, Static 35m15s 12m 6s
CMake, VS2022, Debug, x64, no SSL, Static, HTTP only 25m25s 10m36s
```
Based on these runs:
https://ci.appveyor.com/project/curlorg/curl/builds/49884748
https://github.com/curl/curl/actions/runs/9229448468

This is the first time examples are built in CI with MSVC: Fix all
warnings and errors that came up via
d4b85890555388bec212b75f47a5c1a48705b156 #13771.

Closes #13766

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GHA: add three old (gcc 6, 7, 9) mingw-w64 jobs

Re-implement old mingw-w64 jobs in GHA. This allows to use the latest
Windows runners, replacing Windows Server 2012 R2 (gcc 6) and Window

GHA: add three old (gcc 6, 7, 9) mingw-w64 jobs

Re-implement old mingw-w64 jobs in GHA. This allows to use the latest
Windows runners, replacing Windows Server 2012 R2 (gcc 6) and Windows
Server 2016 (gcc 7, 9) with Windows Server 2022.

GHA runners are also significantly faster, and allow running tests in
parallel (`-j14`). It also offloads 3 more long-running jobs from
AppVeyor CI.

These jobs download (then cache) the mingw-w64 packages from their
original location, which allows flexibility in choosing which versions
and flavours (win32/POSIX, SEH/DWARF, 64/32-bit) we want to test in CI.
The new jobs use these distros:
- https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/ (for gcc 7, same as on AppVeyor)
- https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/ (for gcc 6, same as on AppVeyor)
- https://winlibs.com/ (for gcc 9)

I matched existing AppVeyor job configs, with these differences:
- gcc 6.4.0 instead of 6.3.0.
(same distro as on AppVeyor, but the latest bugfix release)
- gcc 9.5.0 instead of 9.1.0 and a different (but compatible) binary distro.
(in AppVeyor this relies on an old MSYS2 pre-installed on the runner)
- using win32 builds instead of posix for gcc 6.4.0 and 7.3.0.
- websockets enabled.
- always build examples.
- always build tests (this wasn't done for 6.4.0 with AppVeyor CI).

I did not replicate existing test exclusions, and oddly enough the few
failures (so far) were different from MSYS2 jobs and also from their
AppVeyor CI counterparts.

Also:
- delete redundant (default) `-u` option from `cygpath` calls.
- allow matrix options to override default ones in CMake.
- detect and use Windows-supplied curl for `TFLAGS` `-ac` option.
(it's available in modern runners.)
- delete the 3 AppVeyor CI jobs now replicated in GHA.
- appveyor: prefer `SYSTEMROOT` over `WINDIR`.
- tidy-up quotes.

Job performance:
```
AppVeyor GHA
w/examples
w/tests
-------- ----------
CMake, mingw-w64, gcc 6, Debug, x86, Schannel, Static, no-unity 1m25s 8m50s
CMake, mingw-w64, gcc 7, Debug, x64, Schannel, Static, Unicode 31m45s 9m39s
CMake, mingw-w64, gcc 9, Debug, x64, Schannel, Static 28m25s 13m38s
```
Based on these runs:
https://ci.appveyor.com/project/curlorg/curl/builds/49880799
https://github.com/curl/curl/actions/runs/9218292508

Notice that building examples and tests is time consuming.

We can tweak any build parameter as necessary to make them more useful
and/or without clogging the job queue or introducing flakiness.

Closes #13759

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GHA: add MSYS, mingw-w64, Cygwin jobs

- re-implement autotools MSYS and Cygwin AppVeyor jobs in GHA.
Now build with SSL and PSL to improve test coverage.
- re-implement MSYS2 mingw

GHA: add MSYS, mingw-w64, Cygwin jobs

- re-implement autotools MSYS and Cygwin AppVeyor jobs in GHA.
Now build with SSL and PSL to improve test coverage.
- re-implement MSYS2 mingw-w64 gcc 13 AppVeyor job in GHA.
`CMake, mingw-w64, gcc 13, Debug, x64, Schannel, Static, Unicode`
- add new cmake Cygwin job (build-only).
- enable `-j14` parallelism when running tests.
- delete the 5 migrated jobs from AppVeyor CI.
- add 2 build-only mingw-w64 builds, gcc Release and clang OpenSSL.
- also enable brotli, libssh2, nghttp2 for more test coverage.

These jobs offer better performance, more flexibility and
parallelization compared to the AppVeyor ones they replace. It also
offloads AppVeyor, allowing to iterate faster. They also appear more
reliable than e.g. Azure Windows jobs, where runners are prone to fail
[1].

Closes #13599

[1]:
`Exit code 143 returned from process: file name 'C:\Windows\system32\docker.EXE',
arguments 'exec -i 6b13a669c6dfe7fb9f59414369872fd64d61c7182f880c3d39c135cb4c115c8f
C:\__a\externals\node\bin\node.exe C:\__w\_temp\containerHandlerInvoker.js'.`

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appveyor: guard against crash-build with VS2008

The combination of `-DDEBUGBUILD`, a shared `curl.exe`, and the VS2008
compiler creates a `curl.exe` segfaulting on startup:

```

appveyor: guard against crash-build with VS2008

The combination of `-DDEBUGBUILD`, a shared `curl.exe`, and the VS2008
compiler creates a `curl.exe` segfaulting on startup:

```
+ _bld/src/curl.exe --version
./appveyor.sh: line 122: 793 Segmentation fault "${curl}" --version
Command exited with code 139
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/49817266/job/651iy6qn1e238pqj#L191

Add job that triggers the issue and add the necessary logic to skip
running the affected `curl.exe`.

Ref: #13592
Closes #13654

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appveyor: tidy-ups

- delete a duplicate line.
- simplify a `make` call.
- merge two `if` branches.
- reorder autotools options for clarity.
- add `--enable-warnings` where mi

appveyor: tidy-ups

- delete a duplicate line.
- simplify a `make` call.
- merge two `if` branches.
- reorder autotools options for clarity.
- add `--enable-warnings` where missing (it's also the default.)
- add empty lines to YAML for readability.
- use lowercase install prefix/directory.

Closes #13598

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CI: ignore test 286 on Appveyor gcc 7 build

Disabled earlier for gcc 9 builds. gcc 7 uses the same runner and
prone to similar intermittent failures.

Follow-up to f1e05a6e6e7225

CI: ignore test 286 on Appveyor gcc 7 build

Disabled earlier for gcc 9 builds. gcc 7 uses the same runner and
prone to similar intermittent failures.

Follow-up to f1e05a6e6e7225fa09952abb2c935ae1abe44f45 #12106 #12040
Closes #13575

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appveyor: make gcc 6 mingw64 job build-only

This job has proven to be the flakiest of all, and it's also the oldest
Windows runner we had tests running on: 'Visual Studio 2015', that is

appveyor: make gcc 6 mingw64 job build-only

This job has proven to be the flakiest of all, and it's also the oldest
Windows runner we had tests running on: 'Visual Studio 2015', that is
running on Windows Server 2012 R2:
https://www.appveyor.com/docs/windows-images-software/

Turn off tests on this job to help stabilizing CI runs.

This was also one of the slowest running job amongst the AppVeyor CI ones.

Flakiness data:
https://testclutch.curl.se/static/reports/summary.html
Entries:
Appveyor / CMake, mingw-w64, gcc 6, Debug, x86, Schannel, Static, no-unity (curl) [current]
Appveyor / CMake, mingw-w64, gcc 6, Debug, x86, Schannel, Static (curl) [former]

Closes #13566

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appveyor: make VS2010 job build-only, enable Schannel, fix compiler warnings

Tests were consistently flaky for a while.

Also fix compiler warnings in `CertOpenStore()` calls for old

appveyor: make VS2010 job build-only, enable Schannel, fix compiler warnings

Tests were consistently flaky for a while.

Also fix compiler warnings in `CertOpenStore()` calls for old MSVC compilers:
```
C:/projects/curl/lib/vtls/schannel.c(688):
warning C4306: 'type cast' : conversion from 'int' to 'LPCSTR' of greater size
C:/projects/curl/lib/vtls/schannel_verify.c(642):
warning C4306: 'type cast' : conversion from 'int' to 'LPCSTR' of greater size
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/49580310/job/ywu2y44kymgc0nif#L106

Closes #13330

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projects: drop MSVC project files for recent versions

We encourage users to generate visual studio project files using CMake.

We keep project files in git for ancient visual studio

projects: drop MSVC project files for recent versions

We encourage users to generate visual studio project files using CMake.

We keep project files in git for ancient visual studio versions that
cmake cannot generate files for, but we no longer ship the project files
in the tarballs.

appveyor: switch VisualStudioSolution job to VC12 (Visual Studio 2013)

Co-Authored-by: Viktor Szakats
Co-Authored-by: Jay Satiro

Closes #13311

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