For Find modules where `<Modulename>` is not fully uppercase.
`<Modulename>` is case-exact name used in the Find modules filename:
`CMake/Find<Moduleame>.cmake`.
`find_package_handle_standard_args()` sets both `<MODULENAME>_FOUND` and
`<Modulename>_FOUND` when detecting the dependency. Some CMake code
relies on this and 3rd-party code may rely on it too. Make sure to set
the latter variant when detecting the dependency via `pkg-config`, where
we don't call `find_package_handle_standard_args()`.
CMake sets these variable to `TRUE` (not `ON` or `1`). Replicate this
for compatibility.
Closes#16153
- add `iphlpapi` library for c-ares.
Ref: 082d98ba6b
- fix to not add system libs if the dependency was not found.
librtmp, Rustls, wolfSSL
Follow-up to 421e592db2#15832
Follow-up to 7bab201abe#15193Closes#16089
via `DL_LIBRARY`, `MATH_LIBRARY`, `PTHREAD_LIBRARY` variables.
They are used in Rustls, wolfSSL Find modules.
Also:
- always use `NAMES` keyword in `find_library()` calls.
- respect `find_library()` results for `dl`, `m`, `pthread`.
- formatting.
Closes#15892
Make the Find modules set and return their respective `pkg-config`
module name(s) to the CMake build process, which then adds those
to the `Requires:` list.
Before this patch, `pkg-config` module names were maintainted in two
separate places. After this patch, they are maintained in the Find
modules for dependencies that have one (most do).
Re-align existing modules with this change: msh3, mbedtls, rustls.
These modules return their `pkg-config` module name only when
detected via `pkg-config`.
Follow-up to d511ec8b0a#15573Closes#15800
The idea of linking dependencies found to `libcurl.pc` turns out not
to work in practice in some cases.
Specifically: gss, ldap, mbedtls, libmsh3, rustls
A `.pc` may not work or be missing for a couple of reasons:
- not all build methods generate it: mbedTLS, Rustls
- generated file is broken: msh3
Ref: https://github.com/nibanks/msh3/pull/225
- installed package flavour isn't shipping with one:
FreeBSD GSS, OmniOS LDAP, macOS LDAP
The effect of such issues shall be subtle in theory, because
`libcurl.pc` normally lists these dependencies in the `Requires.private`
section meant for static linking. But, e.g. `pkg-config --exists`
requires these to be present, and builds sometimes use this check
regardless of build type. This bug is not present in `pkgconf`; it only
checks for them when `--static` is also passed.
Fix these by adding affected `.pc` references to `libcurl.pc` only when
we detected the dependency via `pkg-config`.
There are a few side-effects of this solution:
- references are never added for dependencies where curl doesn't
implement `pkg-config` detection. These are:
- autotools: ldap, mbedtls, msh3
- cmake: ldap (pending #15273)
- generated `libcurl.pc` depends on the build-time environment.
- generated `libcurl.pc` depends on curl build tool (cmake, autotools).
- generated `libcurl.pc` depends on curl build implementation details.
Make an exception for GNU GSS, where I blindly guess that `gss.pc` is
always available, as no issues were reported.
Other, not mentioned, dependencies continue to be added regardless
of the detection method.
Reported-by: Harmen Stoppels, Thomas, Daniel Engberg, Andy Fiddaman
Fixes#15469Fixes#15507Fixes#15535
Fixes https://github.com/curl/curl/pull/15163#issuecomment-2473358444Closes#15573
Extend `INSTALL-CMAKE` document with the list of available options,
a short description and default values.
The list may not be 100% complete.
There are no component boundaries in CMake, so the line is blurry
between curl options, CMake options, CMake Find modules options.
I included certain CMake options that seemed useful, and/or have
dedicated use withing curl's CMake source. But, all CMake built-in
options are usable, as documented upstream in CMake.
The naming of the options has a heritage and the inconsistencies with
it, including a lack of clear namespace. This may be subject to future
updates, also after figuring out which name has special meaning within
CMake and/or CMake projects out of unwritten convention or something
more tangible.
CMake allows to initialize any internal variable via `-D`. This may be
useful to pre-initialize/override feature check results. The list
doesn't contain these, and they remain officially undocumented.
Also:
- make adjustments to keep the spellchecker happy.
- retrofit description changes to the cmake sources.
- stop documenting deprecated `Find*` variables.
Reported-by: Daniel Stenberg
Fixes https://github.com/curl/curl/discussions/14885Closes#15388
Also:
- detect and add required system libraries for Rustls on macOS and
non-Windows.
- add Linux CMake jobs for the touched dependencies.
Caveats:
- MSH3 generates a broken `libmsh3.pc`, so needs manual config.
Upstream PR: https://github.com/nibanks/msh3/pull/225
- Rustls `.pc` file missing, so needs manual config.
An internal change worthy of mention is that we are using the lib path
and name information returned by `pkg-config` as-is. Meaning the libname
doesn't include the full path, like it's usual with native cmake
detection. The path comes separately and needs to be rolled separately.
For this we add it to targets via `link_directories()`. We also keep tab
of them in `CURL_LIBDIRS` and use that in `libcurl.pc`. Feature checks
also need to receive these paths. CMake doesn't offer
a `CMAKE_REQUIRED_*` variable for this purpose, only
a `CMAKE_REQUIRED_LINK_OPTIONS` accepting raw linker flags. Add a macro
to convert a list of paths to linker options to solve it. wolfSSL
requires this for now.
Closes#15193
- `FindCARES` -> `FindCares`
- `FindLibPSL` -> `FindLibpsl`
- `FindLibSSH2` -> `FindLibssh2`
- `FindQUICHE` -> `FindQuiche`
- `Findrustls` -> `FindRustls`
Our convention for naming Find modules (the part after the `Find`
prefix, also called as 'package name') is:
Always start with uppercase. Follow with lowercase, unless there is
a clear preference for a stylized name. E.g. the project itself uses it
that way with a matching `<Name>Config.cmake` file, or we use it that
way elsewhere, or the name is an acronym.
Ref: #14580Closes#14601
