Commit graph

793 commits

Author SHA1 Message Date
Viktor Szakats
cdfc8dc7ad
build: tidy up and simplify setmode() detection and use
- move macro to `curl_setup.h` (from curlx), and rename.
  It's required by src, test servers, libtests. Also used by unit/tunit,
  (which is fixable but this patch doesn't touch it.)
- special-case it for Windows/Cygwin/MS-DOS.
- build: drop `setmode()`/`_setmode()` detection.
  This also avoids detecting the different `setmode()` on BSDs,
  and a lot of complexity and overhead.
- use `CURL_O_BINARY`.

Follow-up to 250d613763 #15787
Follow-up to 5e70566094 #15169

Closes #20539
2026-02-08 15:47:47 +01:00
Viktor Szakats
f659b82c2a
build: make HTTP_ONLY build options also disable websockets
Closes #20525
2026-02-05 13:12:10 +01:00
Viktor Szakats
4fb5c916fd
cmake: use list(APPEND ...) where missing
Cherry-picked from #20407

Closes #20522
2026-02-05 13:12:10 +01:00
Viktor Szakats
0590753a3c
build: require POSIX strdup()
Stop detecting this function and drop the local fallback.

Let us know if this update is causing an issue.

Notes:
- on Windows `_strdup()` is required instead.
- `strdup()/_strdup()` were required before this patch to build one of
  the examples: `block_ip`.
- `strdup()/_strdup()` were required in 8.18.0 and earlier to build
  tests.

Closes #20505
2026-02-03 17:50:18 +01:00
Viktor Szakats
31a4f415af
build: tidy up and dedupe strdup functions
- de-dupe lib/src strdup/memdup functions into curlx.
- introduce `CURLX_STRDUP_LOW()` for mapping `strdup()`, and to do it at
  one place within the code, in `curl_setup.h`.
- tests/server: use `curlx_strdup()`. (Also to fix building without
  a system `strdup()`.)
- curlx/curlx.h: shorten and tidy up.
- adjust Windows build path to not need `HAVE_STRDUP`.
- build: stop detecting `HAVE_STRDUP` on Windows.

Closes #20497
2026-02-03 14:02:30 +01:00
Viktor Szakats
4f1646ef8a
cmake: skip binutils ld hack if zlib/openssl target is not IMPORTED
The binutils ld hack requires reading the targets' `LOCATION` property.
This property exists in `IMPORTED` targets. `ZLIB::ZLIB` and
`OpenSSL::Crypto` are normally `IMPORTED` targets defined by CMake's
built-in Find modules. However, in some cases (e.g. in "superbuilds"),
they may be regular targets, defined manually, without a `LOCATION`
property. To avoid a CMake warning in such case, verify if the target is
`IMPORTED` before reading this property.

This also mean that in such case the binutils/ld/gcc hack is not
enabled, and libcurl may fail linking in static mode.

https://cmake.org/cmake/help/v4.2/prop_tgt/IMPORTED.html
https://cmake.org/cmake/help/v4.2/prop_tgt/LOCATION.html

Reported-by: Tomáš Malý
Fixes #20419
Follow-up to 3e841630ec #20427
Follow-up to 16f073ef49 #16973

Closes #20486
2026-02-02 12:28:12 +01:00
Viktor Szakats
3003c32cb2
tidy-up: miscellaneous
- INSTALL-CMAKE.md: add missing periods, text fixes.
- md4, md5: sync variables names.
- curl_trc: sync an argument type.
- docs/examples: sync debug/trace function copies, constify, tidy-ups.
- replace commented code with `#if 0`.
- drop redundant parenthesis (macro values, `return`, around single
  variables, function calls).
- fix indentation, apply clang-format in places.

Closes #20481
2026-02-01 00:54:23 +01:00
Viktor Szakats
feb52be197
build: assume stdint.h
curl requires `stdint.h` from C99, and no longer builds without it since
v8.18.0 (after dropping VS2008 support). Assume it's available, drop
feature checks.

Also:
- drop duplicate `stdint.h` includes.
- introduce internal `HAVE_UINTPTR_T`, enabled by default.
- OS400: disable `HAVE_UINTPTR_T`.
- build: keep cmake pre-fill and `cmp-config.pl` exception because cmake
  and autotools both detect `stdint.h` implicitly.

Co-authored-by: Dan Fandrich
Ref: #20405
Ref: #20384
Follow-up to 2e1a045d89 #17931

Closes #20406
2026-01-28 12:05:20 +01:00
Viktor Szakats
67ad0b0d79
cmake: initialize internal CURL_INCLUDES variable
Closes #20451
2026-01-27 15:24:29 +01:00
Viktor Szakats
3aa4fbf2d4
cmake: add CURL_BUILD_EVERYTHING option
To build all targets in a single go, meaning curl and libcurl as normal,
and tests and examples in addition. To build-test everything without
running multiple cmake commands.

Enable with:
- `-DCURL_BUILD_EVERYTHING=ON`
  Special values: `QUICK` to build examples quickly for build test,
  `NOEXAMPLES` to not build examples.

A well-equipped build takes 2.8s of configure time, and 1.7s to build
everything (shared, unity, ninja, prefill), 1.4s with `QUICK`. Without
this option it takes <1s to build curl/libcurl.

Also: streamline `CURL_LINT` internal logic.

Closes #20429
2026-01-26 02:08:02 +01:00
Viktor Szakats
795433b923
cmake: enable binutils ld workaround for all toolchains at build-time
To make it available for GCC if used when consuming libcurl.

Also add comment to `curl-config.cmake` explaining why these odd targets
are defined there.

Bug: https://github.com/curl/curl/pull/20382#discussion_r2716660108
Follow-up to 3e841630ec #20427
Follow-up to ef3101d181 #20382
Follow-up to 16f073ef49 #16973

Closes #20434
2026-01-25 22:37:56 +01:00
Viktor Szakats
3e841630ec
cmake: fix logic for openssl/zlib binutils ld workaround
While working #16973, the binutils ld lib order workaround logic
regressed so that it modified the wrong target, writing into the system
`ZLIB::ZLIB` and `OpenSSL::Crypto` ones a `INTERFACE_LINK_LIBRARIES`
property, instead of creating CURL-namespaced targets. Oddly enough,
this also fixed the binutils ld lib ordering issue. It seems this
property makes CMake insert each referenced library in two more
positions (not at the very end though), which allows ld to resolve all
symbols in the cases tested in CI.

Fix by creating the indented namespaced targets, and also creating
these in `curl-config.cmake` to be available when consuming libcurl.

Note that the logic continues doing `get_target_property()` on the two
system targets above. If these targets are defined manually and miss
the `LOCATION` propery, or are defined as aliases, this command may
fail. curl expects these targets be created by CMake's `FindZLIB` and
`FindOpenSSL` built-in Find modules (or ones compatible). Ref: #20419

The binutils ld issue is reproduced by these CI jobs:
 - Linux gcc glibc (amd64, arm64)
- Windows gcc zlib-classic (x64)

Currently using this curl-for-win revision:
7d12669daf
Examples:
https://github.com/curl/curl/actions/runs/21332437230/job/61399234023?pr=20427
https://github.com/curl/curl/actions/runs/21332437230/job/61399234033?pr=20427

Comparison of lib orders, as passed by CMake to the linker:

without workaround (possibly breaking binutils `ld`):
```diff
 -framework [...]
 libssl.dylib
 libcrypto.dylib
 libz.tbd
 -lssh2 -lidn2
 libldap.tbd
 liblber.tbd
 -lbrotlidec -lbrotlicommon -lzstd -lnghttp2 -lpsl -lrtmp
 -lz
 -lssl
 -lcrypto
```

before this patch:
```diff
 -framework [...]
 libssl.dylib
 libcrypto.dylib
 libz.tbd
+libcrypto.dylib <== inserted via `INTERFACE_LINK_LIBRARIES`
+libz.tbd        <== inserted via `INTERFACE_LINK_LIBRARIES`
 -lssh2 -lidn2
 libldap.tbd
 liblber.tbd
+libcrypto.dylib <== inserted via `INTERFACE_LINK_LIBRARIES`
+ibz.tbd         <== inserted via `INTERFACE_LINK_LIBRARIES`
 -lbrotlidec -lbrotlicommon -lzstd -lnghttp2 -lpsl -lrtmp
 -lz
 -lssl
 -lcrypto
```

after this patch:
```diff
 -framework [...]
 libssl.dylib
 libcrypto.dylib
 libz.tbd
 -lssh2 -lidn2
 libldap.tbd
 liblber.tbd
 -lbrotlidec -lbrotlicommon -lzstd -lnghttp2 -lpsl -lrtmp
 -lz
 -lssl
 -lcrypto
+libcrypto.dylib <== inserted via `CURL::OpenSSL_Crypto`
+libz.tbd        <== inserted via `CURL::ZLIB`
```

Bug: https://github.com/curl/curl/pull/20382#discussion_r2716660108
Reverts: 615c43eae8
Follow-up to 16f073ef49 #16973

Closes #20427
2026-01-25 20:49:04 +01:00
Viktor Szakats
66ad54e46b
cmake: add CURL_DROP_UNUSED option to reduce binary sizes
To enable known linker options dropping unused, dead, code and data from
the executables built.

Useful to reduce binary sizes for curl, libcurl shared lib and apps
linking static libcurl. It's effective on both "unity" and non-unity
builds. Aligning "unity" build sizes with default, non-unity ones.

Supported platforms: Apple, MSVC, llvm/clang and GCC on all tested
platforms: Linux, BSDs, Windows, MSYS2/Cygwin, Android, MS-DOS.

Notes:
- Static libraries grow 20-30% with non-Apple toolchains.
  This effect is controlled by separate, optional compiler flags on
  non-Apple. This patch enables them automatically for public binaries
  (libcurl and curl tool), and leaves them off for internal/test ones.
- MSVC enables this option by default for 'Release' configurations.
  The curl build option has no effect on it.
- Observed effect on VS2010 is negligible. VS2012+ is recommended.
- Works with LTO, Fil-C.
- No observed/conclusive effect on build speed.
- On Windows with clang/gcc (mingw-w64/MSYS2/Cygwin) it also enables
  `-fno-asynchronous-unwind-tables` as a workaround to make
  the toolchain options actually work.
  Ref: https://sourceware.org/bugzilla/show_bug.cgi?id=11539
  Thanks-to: Andarwinux

Also:
- GHA: enable in Linux and MinGW jobs to test it. Size changes:

  - linux aws-lc H3:
    curl: 2000000 -> 1937152, libcurl.a: 2065724 -> 2716532 bytes
  - macos clang HTTP-only:
    curl: 1364376 -> 128799 bytes, libcurl.a: unchanged
  - macos llvm MultiSSL:
    curl: 410056 -> 405720, libcurl.dylib: 1350336 -> 1348480 bytes
  - mingw schannel c-ares U:
    curl: 1588736 -> 1507328, libcurl-d.a: 3322040 -> 3884746 bytes
    bld: 34 -> 35MB

- GHA: enable in MSVC and Apple jobs to reduce disk footprint, with no
  obvious downside. Size changes:

  - AppVeyor CI VS2019:
    curl: 2339840 -> 1295872, libcurl-d.dll: 3155968 -> 1900544 bytes
    bld: 161 -> 97MB
  - AppVeyor CI VS2022 clang-cl:
    curl: 2933248 -> 2332160, libcurl-d.lib: 4762688 -> 5511330 bytes
    bld: 133 -> 121MB
  - AppVeyor CI VS2022 HTTP-only:
    curl: 3514368 -> 2177024, libcurl-d.lib: 2538420 -> 3151740 bytes
    bld: 137 -> 83MB
  - GHA intel:
    curl: 2629120 -> 2023424, libcurl-d.lib: 4366652 -> 5350670 bytes
    bld: 86 -> 69MB
  - GHA arm64:
    curl: 2832896 -> 2063872, libcurl-d.lib: 4690616 -> 5597250 bytes
    bld: 82 -> 66MB

Refs:
https://maskray.me/blog/2021-02-28-linker-garbage-collection
https://web.archive.org/web/20110811230637/msdn.microsoft.com/en-us/library/bxwfs976.aspx (VS2010)
https://learn.microsoft.com/cpp/build/reference/opt-optimizations
https://learn.microsoft.com/cpp/build/reference/gy-enable-function-level-linking

Closes #20357
2026-01-22 17:08:20 +01:00
Viktor Szakats
e50aa46fb2
build: update to not need _CRT_NONSTDC_NO_DEPRECATE with MSVC
Use non-deprecated CRT function variants on Windows.

- introduce `curlx_fdopen()`, `curlx_close()` and use them. Map them to
  non-deprecated, underscored, CRT functions on Windows.

- replace `close()` uses with either `sclose()` (for sockets) or
  `curlx_close()` (for files).

- map `fileno`, `unlink`, `isatty` to their non-deprecated, underscored,
  versions on Windows.

- tool_dirhie: map `mkdir` to `_mkdir` on Windows.

- easy: use `_strdup()` on Windows, regardless of how `HAVE_STRDUP` is
  set.

- cmake: assume `HAVE_STRDUP` on Windows. To allow dropping a detection
  hack using `_CRT_NONSTDC_NO_DEPRECATE` with MSVC. Windows always has
  `_strdup()` which the code uses, but also needs `HAVE_STRDUP` defined
  to disable curl's own `strdup()` implementation.

- curl_setup.h: drop `_CRT_NONSTDC_NO_DEPRECATE` as no longer necessary.

Closes #20212
2026-01-20 23:19:54 +01:00
Viktor Szakats
09c9afdd71
cmake: silence silly Apple clang warnings in C89 mode, test in CI
- `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 e8189c4420 #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
2026-01-20 13:05:01 +01:00
Viktor Szakats
2d5a063121
build: merge TrackMemory (CURLDEBUG) into debug-enabled option
Drop separate `TrackMemory` (aka `CURLDEBUG`) debug feature.

After recent changes (thread-safety,
193cb00ce9, and updates leading up to
it), `TrackMemory` is unlikely to cause build or runtime issues.

To simplify builds and debug options, enable `TrackMemory`
unconditionally for debug-enabled (aka `DEBUGBUILD`) builds. Before
this patch, this was already the default, with an option to disable
it, or enable it in non-debug-enabled builds.

Note, in practice these two debug options already went hand in hand. It
was not possible to toggle them separately for a long time due to bugs,
before 59dc9f7e69 (2024-05-28) fixed it.

This patch also removes/deprecates separate knobs and feature flags for
`TrackMemory`:
- autotools: `--enable-curldebug`/`--disable-curldebug`
- cmake: `-DENABLE_CURLDEBUG=ON`/`OFF`
- C macro: `CURLDEBUG`
- libcurl: `CURL_VERSION_CURLDEBUG` symbol deprecated in favor
  of `CURL_VERSION_DEBUG`. They always return the same value after this
  patch.

Also:
- drop `TrackMemory` from `curl -V` output.
- rename internal `CURLDEBUG` macro to `CURL_MEMDEBUG` internally.
  To avoid confusion with `DEBUGBUILD`, but to keep guarding
  `TrackMemory`-related internals for readability.
- runtests: bind `TrackMemory` to debug feature. Keep it a separate
  test feature requirement, for clarity.
- CI: drop test builds for combinations of the two options.
- GHA/linux: no longer disable TrackMemory in the TSAN job.

Ref: https://github.com/curl/curl/pull/20328#issuecomment-3754528407

Closes #20331
2026-01-19 18:43:17 +01:00
Viktor Szakats
0e8683ee2a
cmake: fix variable name for Apple Security framework
Follow-up to eefd03c572 #18703

Closes #20349
2026-01-19 07:48:15 +01:00
Daniel Stenberg
6aaac9dd38
vquic: drop support for OpenSSL-QUIC
- It is slower and uses more memory than the alternatives and is only
  experimental in curl.
- We disable a few tests for OpenSSL-QUIC because of flakiness
- It gets little attention from OpenSSL and we have no expectation of the
  major flaws getting corrected anytime soon.
- No one has spoken up for keeping it
- curl users building with vanilla OpenSSL can still use QUIC through the
  means of ngtcp2

Closes #20226
2026-01-17 22:49:34 +01:00
Daniel Stenberg
6c31df453b
mqtt: initial support for MQTTS
Closes #19418
2026-01-17 22:43:36 +01:00
Viktor Szakats
1730407b74
windows: add build option to use the native CA store
With the same semantics as Apple SecTrust, in both libcurl and the curl
tool, when using non-Schannel TLS backends. In practice it means that
it makes TLS work without manually or implicitly configuring a CA bundle
`.crt` file, such as `curl-ca-bundle.crt`.

To enable:
- autotools: `--enable-ca-native`
- cmake: `-DCURL_CA_NATIVE=ON`
- CPPFLAGS: `-DCURL_CA_NATIVE`

When enabled:
- enables `CURLSSLOPT_NATIVE_CA` (libcurl) / `--ca-native`
  and `--proxy-ca-native` (curl tool) options by default.
- unsafe search for an on-disk CA bundle gets disabled by default.
  Equivalent to `--disable-ca-search` with autotools,
  `-DCURL_DISABLE_CA_SEARCH=ON` with CMake.
- build-time detection of CA bundle and CA path gets disabled. As with
  Apple SecTrust. This was already the default for Windows.
- native CA can be disabled at run-time with the `--no-ca-native`
  and/or `--no-proxy-ca-native` command-line options.

Rationale: This build option:
- has a repeat and active interest from packagers and users.
- helps integrating curl with Windows for those who need this.
- it also applies to macOS: #17525
  Shipped in curl 8.17.0.
- makes it trivial to use custom certs configured on the OS.
- frees applications/packagers/users from the task of securely
  distributing, and keeping up-to-date, a CA bundle.
- frees potentially many curl tool from configuring a CA bundle manually
  to access HTTPS (and other TLS) URLs. This is traditionally difficult
  on Windows because there is no concept of a universal, protected,
  non-world-writable, location on the file system to securely store
  a CA bundle.
- allows using modern features regardless of Windows version. Some of
  these features are not supported with Schannel (e.g. HTTP/3, ECH) on
  any Windows version.
- is necessary for HTTP/3 builds, where bootstrapping a CA bundle is not
  possible with Schannel, because MultiSSL is not an option, and HTTP/3
  is not supported with Schannel.

Ref: #16181 (previous attempt)
Ref: https://github.com/curl/curl/discussions/9348
Ref: https://github.com/curl/curl/issues/9350
Ref: https://github.com/curl/curl/pull/13111
Ref: https://github.com/microsoft/vcpkg/pull/46459#issuecomment-3162068701
Ref: 22652a5a4c #14582
Ref: eefd03c572 #18703

Closes #18279
2026-01-17 19:18:52 +01:00
Viktor Szakats
b17ef873ae
windows: bump minimum to Vista (from XP)
After this patch curl requires targeting Vista or newer, and a toolchain
with Vista support.

Supported MSVC compilers (VS2010+) all support Vista:
- VS2012+ target Win8 (or later) by default.
- VS2010 targets Win7 by default.

Supported mingw-w64 versions (v3+) all support Vista:
- mingw-w64 v9+ target Win10 by default.
- mingw-w64 v8 and older target Server 2003 (~XP) by default.
  After this patch it may be necessary to override the default Windows
  target version to Vista (or newer) via:
  autotools: `CPPFLAGS=-D_WIN32_WINNT=0x0600`
  cmake: `-DCURL_TARGET_WINDOWS_VERSION=0x0600`
- mingw-w64 v6+ allow changing the default at toolchain build-time.

Notes:
- For non-MSVC, non-mingw-w64 toolchains, `if_nametoindex` needs to be
  allowlisted in `curl_setup.h`, if they do support it.

Fixes #17985 (discussion)
Closes #18009
2026-01-17 11:41:49 +01:00
Viktor Szakats
6437bd79ae
cmake: avoid setting custom property on built-in interface targets
In some cases `ZLIB::ZLIB` and/or `OpenSSL::SSL` may be aliases, which
prevents setting a curl-specific property (.pc module name) in them:
```
CMake Error at [...]/curl/CMakeLists.txt:910 (set_target_properties):
  set_target_properties can not be used on an ALIAS target.
```

Fix by special-casing these built-in targets and manually converting
them to .pc module names, without using the targets themselves
to carry this information throughout curl's internal build logic.

Reported-by: Tomáš Malý
Fixes #20313
Follow-up to 16f073ef49 #16973
Closes #20316
2026-01-14 20:46:25 +01:00
Viktor Szakats
60ab58a8a5
cmake: replace an outlier set(var) with set(var, "")
For consistency with the rest of these expressions and readability.

Closes #20305
2026-01-14 00:55:05 +01:00
Viktor Szakats
13f0ede730
build: add curl-lint/lint targets, CURL_LINT cmake option
To run checksrc and spacecheck on the source tree. Also for cmake
to sync up with autotools' `checksrc` target.

- cmake: `curl-lint`
  With `-DCURL_LINT=ON`, checks run automatically for all targets.
- autotools: `lint`

Closes #20175
2026-01-12 16:45:24 +01:00
Daniel Stenberg
0159100f4f
lib: use (u)int64_t instead of long long
Remove config-plan9.h because it does not support 64 bit, meaning it has
not been working for years.

Closes #20233
2026-01-10 12:40:54 +01:00
Joshua Vandaële
97f518e193
cmake: reference OpenSSL and ZLIB imported targets only when enabled
This otherwise broke building on a parent with a static library which is
available but disabled (e.g. CURL_ZLIB is set to OFF but ZLIB::ZLIB
exists)

Closes #20217
2026-01-09 22:03:28 +01:00
Viktor Szakats
9552d9c0c0
build: detect and include inttypes.h again (revert)
Since not using `PRI*` macros, it isn't needed.

Follow-up to 13c1a93414 #20215
Revert 4c9e4e99c1 #20208

Closes #20225
2026-01-09 14:59:30 +01:00
Viktor Szakats
4c9e4e99c1
build: detect and include inttypes.h again
For `PRI*` printf masks for fixed-size C99 types.

Also:
- add simple fallback for `PRIu32`, `PRIx32`, if `inttypes.h` is
  missing.

Cherry-picked from #20200
Ref: #20207
Follow-up to 4701a6d2ae #19695
Ref: 60359ad504 #12275
Closes #20208
2026-01-07 16:10:23 +01:00
Viktor Szakats
532d134767
build: stop disabling strcpy checks with clang-tidy
Follow-up to 436e67f65b #20076

Closes #20084
2025-12-24 00:02:40 +01:00
Viktor Szakats
1892286086
cmake: match filename suffixes with file content
To:
- simplify recognizing CMake sources.
- ensure syntax highlighters use the correct file type.
- sync .h template filename with its autotools counterpart.

Also:
- cmakelint.sh: simplify, alpha sort the filelist.
- perlcheck.sh: simplify.

Closes #20039
2025-12-20 11:34:27 +01:00
Viktor Szakats
14d5b6c7a7
cmake: replace deprecated PERL_FOUND with Perl_FOUND
`Perl_FOUND` available since CMake v3.3.
`PERL_FOUND` deprecated since v4.2.

Ref: https://cmake.org/cmake/help/v4.2/module/FindPerl.html

Closes #20011
2025-12-17 17:56:32 +01:00
Viktor Szakats
32454b954a
localtime: detect thread-safe alternatives and use them
- add local API `toolx_localtime()` to wrap the banned function
  `localtime()`. Used from libcurl, libtests and test servers.
- auto-detect and use `localtime_r()` where available (e.g. Linux).
  Also to support multi-threading.
- use `localtime_s()` on Windows. It requires MSVC or mingw-w64 v4+.
  Also to support multi-threading.
  Use local workaround to also support mingw-w64 v3.
- add `src/toolx` to keep internal APIs used by the curl tool and tests,
  but not by libcurl. `toolx_localtime()` is the first API in it.
- replace `localtime()` calls with `toolx_localtime()`.
  Except in examples.
- note Windows XP's default `msvcrt.dll` doesn't offer secure CRT APIs.
  XP likely needs a newer version of this DLL, or may not run.
- note that `localtime()` mirrors `gmtime()`, with the difference that
  `gmtime()`'s internal wrapper lives in curlx.

Also:
- drop redundant `int` casts.

Refs:
https://learn.microsoft.com/cpp/c-runtime-library/reference/localtime-localtime32-localtime64
https://learn.microsoft.com/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
https://pubs.opengroup.org/onlinepubs/9799919799/functions/localtime.html
https://linux.die.net/man/3/localtime_r

Ref: #19955 (for `gmtime_r()`)
Follow-up to 54d9f060b4
Closes #19957
2025-12-16 14:30:06 +01:00
Viktor Szakats
e413a38190
build: disable typecheck for analyzers and Fil-C
- cmake: automatically disable typecheck when running clang-tidy,
  to avoid possible interference, and to improve performance.

- INSTALL-CMAKE: document both this, and unity=off for clang-tidy.

- GHA/linux: disable for some static analyzers CI jobs to avoid possible
  interference.

- GHA/linux: disable in Fil-C job to improve build performance.

Follow-up to 9e6f1c5efb #19637
Follow-up to fd2ca2399e #17955

Closes #19941
2025-12-12 12:21:45 +01:00
Viktor Szakats
fe8393d7db
tidy-up: miscellaneous
- drop stray duplicate empty lines in docs, scripts, test data, include,
  examples, tests.
- drop duplicate PP parenthesis.
- curl-functions.m4: move literals to the right side in if expressions,
  to match rest of the source code.
- FAQ.md: delete language designator from an URL.
- packages: apply clang-format (OS400, VMS).
- scripts/schemetable.c: apply clang-format.
- data320: delete duplicate empty line that doesn't change the outcome.
- spacecheck: extend to check for duplicate empty lines
  (with exceptions.)
- fix whitespace nits

Closes #19936
2025-12-12 04:18:48 +01:00
Viktor Szakats
163705db75
windows: assume USE_WIN32_LARGE_FILES
All Windows platforms support it. It was permanently enabled with most
build methods. The exception is autotools where it is enabled by
default, with an option to disable it. It changed the build in a few
places for rarely tested code paths, but not bringing other advantages
(and used some 64-bit APIs anyway). This patch makes autotools'
`--disable-largefile` option a no-op for Windows.

Closes #19888
2025-12-09 19:34:13 +01:00
Viktor Szakats
dfd781ff62
tidy-up: miscellaneous
- gnutls, mbedtls: fix casing in log messages.
- src/tool_cfgable.h: drop unused header.
- appveyor.sh: variable style.
- cmakelint.sh: sync with libssh2, catch `.cmake.in` explicitly.
- examples: drop obsolete comments, exclamation marks.
- fix comment typos, casing.

Closes #19839
2025-12-04 20:14:11 +01:00
Viktor Szakats
c421c3e325
cmake: verify minimum CMake version in curl-config.cmake
Show a message if the CMake version is lower than that when consuming
libcurl via the CMake config.

The minimum CMake version on consumption is for now the same as
the minimum required (v3.7) to build curl itself.

Ref: https://cmake.org/cmake/help/v3.7/variable/CMAKE_MINIMUM_REQUIRED_VERSION.html
Ref: #18704 (discussion)
Follow-up to 16f073ef49 #16973
Closes #19776
2025-12-01 14:46:44 +01:00
Viktor Szakats
7799d15eef
cmake: fix ws2_32 reference in curl-config.cmake
Follow-up to 16f073ef49 #16973
Follow-up to 554dfa5568 #17927

Closes #19775
2025-12-01 00:57:12 +01:00
Viktor Szakats
16f073ef49
cmake: define dependencies as IMPORTED interface targets
Rework the way curl's custom Find modules advertise their properties.

Before this patch, Find modules returned detected dependency properties
(header dirs, libs, libdirs, C flags, etc.) via global variables. curl's
main `CMakeLists.txt` copied their values into global lists, which it
later applied to targets. This solution worked internally, but it was
unsuited for the public, distributed `CURLConfig.cmake` and publishing
curl's Find modules with it, due to polluting the namespace of consumer
projects. It's also impractical to apply the many individual variables
to every targets depending on libcurl.

To allow using Find modules in consumer projects, this patch makes them
define as imported interface targets, named `CURL::<dependency>`. Then
store dependency information as target properties. It avoids namespace
pollution and makes the dependency information apply automatically
to all targets using `CURL::libcurl_static`.

Find modules continue to return `*_FOUND` and `*_VERSION` variables.

For dependencies detected via `pkg-config`, CMake 3.16+ is recommended.
Older CMake versions have a varying degree of support for
propagating/handling library directories. This may cause issues in envs
where dependencies reside in non-system locations and detected via
`pkg-config` (e.g. macOS + Homebrew). Use `CURL_USE_PKGCONFIG=OFF`
to fix these issues. Or upgrade to newer CMake, or link libcurl
dynamically.

Also:
- re-enable `pkg-config` for old cmake `find_library()` integration
  tests.
- make `curlinfo` build after these changes.
- distribute local Find modules.
- export the raw list of lib dependencies via `CURL_LIBRARIES_PRIVATE`.
- `CURLconfig.cmake`: use curl's Find modules to detect dependencies in
  the consumer env.
- add custom property to target property debug function.
- the curl build process no longer modifies `CMAKE_C_FLAGS`.
  Follow-up to e86542038d #17047

Ref: #14930
Ref: https://github.com/libssh2/libssh2/pull/1535
Ref: https://github.com/libssh2/libssh2/pull/1571
Ref: https://github.com/libssh2/libssh2/pull/1581
Ref: https://github.com/libssh2/libssh2/pull/1623

Closes #16973
2025-11-29 01:41:40 +01:00
Viktor Szakats
d03712169b
cmake: add support for libbacktrace, fix two build issues
Also:
- memdebug: fix symbol collision in unity builds.
- memdebug: fix compiler warning by making a variable static.

Follow-up to c77bed81a2 #19657

Closes #19666
2025-11-24 14:29:29 +01:00
Viktor Szakats
9e6f1c5efb
build: add build-level CURL_DISABLE_TYPECHECK options
Usage:
- autotools: `--disable-typecheck` (or `--enable-typecheck` (default))
- cmake: `-DCURL_DISABLE_TYPECHECK=ON`.

To disable `curl_easy_setopt()`/`curl_easy_getinfo()` type checking with
supported (new) gcc and clang compilers. It is useful to improve build
performance for the `tests/libtest` target. In particular the CodeQL
analyzer may take above an hour to compile with type checking enabled,
and disabling it brings it down to seconds. On local machines it may
also cut build times in half when build testdeps, depending on platform
and compiler.

Other than these cases, we recommend leaving type checking enabled.

Ref: fdacf34aae #19632

Also:
- GHA/codeql: use it.
- test1165: check in `include/curl`.
- lib1912: delete stray todo comment.
- spelling and comment nits.

Closes #19637
2025-11-21 13:48:35 +01:00
Viktor Szakats
ad35ecba97
badwords: fix issues found in scripts and other files
Single pass, not enforced.

Also:
- pyspelling.words: drop `web page`

Closes #19572
2025-11-17 17:18:07 +01:00
Viktor Szakats
1b48c6148a
tidy-up: miscellaneous
- schannel: delete superfluous parenthesis.
- tftp: delete stray space from log output.
- ws: update guard comment.
- docs/examples: constify variables.
- runtests/servers: enclose unknown parameter between quotes.
- scripts/perlcheck.sh: drop redundant grep `-E` option.
- THANKS: move names from comments to THANKS.
- sync `--depth` option style across scripts.
- sync git repo URL ending between some scripts.
- BINDINGS.md: drop protocol from archive.org URL path.
- whitespace, indent, unfold lines.

Closes #19565
2025-11-17 13:32:43 +01:00
Viktor Szakats
69c89bf3d3
openssl: bump minimum OpenSSL version to 3.0.0
It also means that all supported OpenSSL versions and forks support
TLSv1.3 after this patch.

It reduces `openssl.c` size by more than 10%, or 400 LOC.

Ref: #18822
Closes #18330
2025-11-15 15:56:31 +01:00
Viktor Szakats
554dfa5568
build: drop Windows CE / CeGCC support
Windows CE support was limited to successful builds with ming32ce
(a toolchain that hasn't seen an update since 2009, using an ancient gcc
version and "old mingw"-style SDK headers, that curl deprecated earlier).
Builds with MSVC were broken for a long time. mingw32ce builds were never
actually tested and runtime and unlikely to work due to missing stubs.
Windows CE toolchains also miss to comply with C89. Paired with lack of
demand and support for the platform, curl deprecated it earlier.

This patch removes support from the codebase to ease maintaining Windows
codepaths.

Follow-up to f98c0ba834 #17924
Follow-up to 8491e6574c #17379
Follow-up to 2a292c3984 #15975

Closes #17927
2025-11-15 15:35:23 +01:00
Viktor Szakats
49ef2f8d1e
cmake: adjust defaults for target platforms not supporting shared libs
If CMake reports the target platform not supporting shared libs, turn
`BUILD_SHARED_LIBS` off by default. CMake 3.30+ fails with an error
when trying to create a `SHARED` target for such platforms. Earlier
versions used a workaround that may or may not have worked in practice.

Ref: https://cmake.org/cmake/help/v3.30/policy/CMP0164.html

Seen this with a build setting `-DCMAKE_SYSTEM_NAME=Generic`, e.g.
AmigaOS.

Note this may introduce incompatibility for "Generic" targets, which
support shared libs. If that's the case, set `BUILD_SHARED_LIBS=ON`
manually.

Also drop AmigaOS-specific logic handled automatically after this patch.

Ref: https://cmake.org/cmake/help/v3.7/command/get_property.html
Ref: https://cmake.org/cmake/help/v3.7/prop_gbl/TARGET_SUPPORTS_SHARED_LIBS.html

Closes #19420
2025-11-09 17:56:20 +01:00
Viktor Szakats
9825a3b708
cmake: disable CURL_CA_PATH auto-detection if USE_APPLE_SECTRUST=ON
Syncing behavior with `CURL_CA_BUNDLE` and autotools.

`/etc/ssl/certs` is empty by default on macOS systems, thus no likely
auto-detection finds something there.

Follow-up to eefd03c572 #18703

Closes #19380
2025-11-06 11:42:34 +01:00
Viktor Szakats
8e6149598b
gnutls: report accurate error when TLS-SRP is not built-in
With GnuTLS 3.8.0+ the build-time SRP feature detection always succeeds.
It's also disabled by default in these GnuTLS versions.

When using TLS-SRP without it being available in GnuTLS, report
the correct error code `CURLE_NOT_BUILT_IN`, replacing the out of memory
error reported before this patch.

Also add comments to autotools and cmake scripts about this feature
detection property.

Detecting it at build-time would need to run code which doesn't work
in cross-builds. Once curl requires 3.8.0 as minimum, the build-time
checks can be deleted.

```
# before:
curl: (27) gnutls_srp_allocate_client_cred() failed: An unimplemented or disabled feature has been requested.
# after:
curl: (4) GnuTLS: TLS-SRP support not built in: An unimplemented or disabled feature has been requested.
```

Ref: dab063fca2
Ref: a21e89edac

Closes #19365
2025-11-06 11:42:34 +01:00
Viktor Szakats
3806fd914b
cmake: fix HAVE_GNUTLS_SRP detection after adding local FindGnuTLS module
When GnuTLS is detected via pkg-config on a non-default path, e.g. with
Homebrew arm64 (`/opt/homebrew/`).

This was a regression from a commit made in this release cycle.

The Find module doesn't return an absolute path to the detected library
(as the former solution did), but a bare libname and a libpath. We thus
need to explicitly use the libpath while detecting a feature in GnuTLS
found this way. Syncing this with other dependencies.

Follow-up to 1966c86d71 #19163

Closes #19360
2025-11-04 16:41:34 +01:00
Viktor Szakats
4a6fbd5e1d
NTLM: disable if DES support missing from OpenSSL or mbedTLS
Make autotools and cmake detect DES support in OpenSSL and mbedTLS.
Forward feature macros to C and omit NTLM from the feature preview list.
Use the feature macros in source. This ensure that `-V` output matches
the preview.

OpenSSL doesn't support DES when built with `no-des` or `no-deprecated`.
mbedTLS 4.x no longer supports it, and it's possible to disable it in
<4 with `scripts/config.py unset MBEDTLS_DES_C`.

Before this patch this worked for
mbedTLS 4 only, and with a regression for pending PR #16973.

Also:

- drop NTLM feature check from `curl_setup.h` in favour of autotools/
  cmake feature macros. This makes `curl_setup.h` no longer need
  to include an mbedTLS header, which in turn makes tests/server build
  without depending on mbedTLS.
  Fixing, in #16973:
  ```
  In file included from tests/server/first.h:40,
                   from bld/tests/server/servers.c:3:
  lib/curl_setup.h:741:10: fatal error: mbedtls/version.h: No such file or directory
    741 | #include <mbedtls/version.h>
        |          ^~~~~~~~~~~~~~~~~~~
  ```
  Ref: https://github.com/curl/curl/actions/runs/18689537893/job/53291322012?pr=16973
  Ref: #19181 (initial fix idea)
  Follow-up to 3a305831d1 #19077

- move back mbedTLS header include and version check from
  `curl_setup.h` to each source which consumes mbedTLS.

- GHA/http3-linux: drop workaround that disabled NTLM for
  `no-deprecated` OpenSSL builds.
  Follow-up to 006977859d #12384

- curl_ntlm_core: drop pointless macro `CURL_NTLM_NOT_SUPPORTED`.
  Follow-up to 006977859d #12384

Closes #19206
2025-10-24 12:12:20 +02:00