93e6e4b823
Fix builds with CMake configured to falsely return successful detection when using `check_function_exists()` (and `check_library_exists()`, and anything based on `try_compile()` that's relying on the linker). After such mis-detection the build fails when trying to use the feature that doesn't in fact exist. The mis-detection is caused by this CMake setting: ``` set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY) ``` It is set by default (or on conditions) when using 3rd-party toolchain: https://github.com/leetal/ios-cmake/blob/master/ios.toolchain.cmake After this patch the curl build overrides this setting for the duration of feature tests, and logs a message about it. Also preset and skip feature tests for known mis-detections: - `connect()` in `libsocket` - `getpass_r()` - `eventfd()` (did not cause an issue due to a separate bug) - `sendmmsg()` (did not cause an issue because it's Linux-only) If mis-detections are still seen, the workaround is to force-set the specific feature by passing `-DHAVE_*=OFF` to cmake. Also consider passing `-DENABLE_STRICT_TRY_COMPILE=ON` for `ios.toolchain.cmake` to fix the root cause. Interestingly curl itself uses this setting to speed up compile-only detections: |
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|---|---|---|
| .circleci | ||
| .github | ||
| CMake | ||
| docs | ||
| include | ||
| lib | ||
| LICENSES | ||
| m4 | ||
| packages | ||
| plan9 | ||
| projects | ||
| scripts | ||
| src | ||
| tests | ||
| winbuild | ||
| .dir-locals.el | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| acinclude.m4 | ||
| appveyor.sh | ||
| appveyor.yml | ||
| buildconf | ||
| buildconf.bat | ||
| CHANGES.md | ||
| CMakeLists.txt | ||
| configure.ac | ||
| COPYING | ||
| curl-config.in | ||
| Dockerfile | ||
| GIT-INFO.md | ||
| libcurl.pc.in | ||
| Makefile.am | ||
| Makefile.dist | ||
| README | ||
| README.md | ||
| RELEASE-NOTES | ||
| renovate.json | ||
| REUSE.toml | ||
| SECURITY.md | ||
Curl is a command-line tool for transferring data specified with URL syntax. Learn how to use curl by reading the manpage or everything curl.
Find out how to install curl by reading the INSTALL document.
libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl manpage to learn how.
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