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

.github/workflows/cygwin.yml

@@ -51,7 +51,7 @@ jobs:
       matrix:
         include:
           - { build: 'automake', platform: 'x86_64', tflags: ''       , config: '--enable-debug --disable-threaded-resolver', name: 'openssl' }
-          - { build: 'cmake'   , platform: 'x86_64', tflags: 'skipall', config: '-DCURL_USE_OPENSSL=ON', name: 'openssl R' }
+          - { build: 'cmake'   , platform: 'x86_64', tflags: 'skiprun', config: '-DCURL_USE_OPENSSL=ON', name: 'openssl R' }
       fail-fast: false
     steps:
       - run: git config --global core.autocrlf input
@@ -118,7 +118,7 @@ jobs:
 
       - name: 'autotools run tests'
         if: ${{ matrix.build == 'automake' && matrix.tflags != 'skipall' && matrix.tflags != 'skiprun' }}
-        timeout-minutes: 40
+        timeout-minutes: 15
         run: |
           export TFLAGS='-j8 ${{ matrix.tflags }}'
           if [ -x "$(cygpath "${SYSTEMROOT}/System32/curl.exe")" ]; then

.github/workflows/macos.yml

@@ -253,6 +253,7 @@ jobs:
         run: make -C bld V=1 -C tests
 
       - name: 'run tests'
+        timeout-minutes: 20
         run: |
           export TFLAGS='${{ matrix.tflags }} -j10'
           TFLAGS+=' ~2037 ~2041'  # flaky
@@ -385,6 +386,7 @@ jobs:
         run: make -C bld testdeps
 
       - name: 'cmake run tests'
+        timeout-minutes: 10
         run: |
           export TFLAGS='${{ matrix.build.tflags }} -j10'
           TFLAGS+=' ~2037 ~2041'  # flaky

.github/workflows/windows.yml

@@ -50,7 +50,7 @@ jobs:
         include:
           - { build: 'autotools', sys: 'msys'   , env: 'x86_64'      , tflags: '!19                !1233', config: '--enable-debug --disable-threaded-resolver --disable-proxy', name: '!proxy' }
           - { build: 'autotools', sys: 'msys'   , env: 'x86_64'      , tflags: '!19 !504 !704 !705 !1233', config: '--enable-debug --disable-threaded-resolver', name: 'default' }
-          - { build: 'cmake'    , sys: 'msys'   , env: 'x86_64'      , tflags: 'skipall'                 , config: '-DENABLE_DEBUG=ON -DENABLE_THREADED_RESOLVER=OFF', name: 'default' }
+          - { build: 'cmake'    , sys: 'msys'   , env: 'x86_64'      , tflags: 'skiprun'                 , config: '-DENABLE_DEBUG=ON -DENABLE_THREADED_RESOLVER=OFF', name: 'default' }
           - { build: 'autotools', sys: 'msys'   , env: 'x86_64'      , tflags: '!19 !504 !704 !705 !1233', config: '', name: 'default R' }
           - { build: 'autotools', sys: 'mingw64', env: 'x86_64'      , tflags: 'skiprun'                 , config: '--enable-debug --disable-threaded-resolver --disable-curldebug --enable-static=no', name: 'default' }
           - { build: 'autotools', sys: 'mingw64', env: 'x86_64'      , tflags: '~472 ~1299 ~1613'        , config: '--enable-debug --with-windows-unicode --enable-ares', name: 'c-ares U' }
@@ -438,7 +438,7 @@ jobs:
             arch: 'x64'
             plat: 'uwp'
             type: 'Debug'
-            tflags: 'skipall'
+            tflags: 'skiprun'
             config: '-DENABLE_DEBUG=ON -DENABLE_UNICODE=OFF -DCURL_USE_SCHANNEL=OFF -DCURL_BROTLI=ON -DCURL_ZSTD=ON -DBUILD_SHARED_LIBS=OFF -DCURL_USE_LIBSSH2=ON -DCURL_USE_OPENSSL=ON -DUSE_OPENSSL_QUIC=ON -DCURL_USE_LIBPSL=OFF'
           - name: 'libressl'
             install: 'brotli zlib zstd libpsl nghttp2 libressl libssh2[core,zlib]'

appveyor.yml

@@ -59,6 +59,7 @@ environment:
       ENABLE_UNICODE: 'OFF'
       HTTP_ONLY: 'OFF'
       SHARED: 'ON'
+      TFLAGS: 'skiprun'
     - job_name: 'CMake, VS2022, Release, x64, OpenSSL 3.2, WebSockets, Build-only'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
       BUILD_SYSTEM: CMake
@@ -91,6 +92,7 @@ environment:
       SCHANNEL: 'ON'
       ENABLE_UNICODE: 'OFF'
       HTTP_ONLY: 'OFF'
+      TFLAGS: 'skiprun'
     - job_name: 'CMake, VS2022, Debug, x64, Schannel, Static, Unicode, Build-only'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
       BUILD_SYSTEM: CMake

tests/server/util.c

@@ -466,6 +466,13 @@ long timediff(struct timeval newer, struct timeval older)
 
 typedef void (*SIGHANDLER_T)(int);
 
+#if defined(_MSC_VER) && _MSC_VER == 1600
+/* Workaround for warning C4306:
+   'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' */
+#undef SIG_ERR
+#define SIG_ERR  ((SIGHANDLER_T)(size_t)-1)
+#endif
+
 #ifdef SIGHUP
 static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
 #endif