curl-rustls.m4: keep existing `CPPFLAGS`/`LDFLAGS` when detected

Different variable names were used in flag save and restore operations,
which could cause existing `CPPFLAGS` and `LDFLAG

curl-rustls.m4: keep existing `CPPFLAGS`/`LDFLAGS` when detected

Different variable names were used in flag save and restore operations,
which could cause existing `CPPFLAGS` and `LDFLAGS` be accidentally lost
when detecting Rustls.

Follow-up to 647e86a3efe1eea7a2a456c009cfe1eb55fe48eb #13179
Closes #15546

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curl-rustls.m4: set linker flags to allow rustls build on macos

Assisted-by: Viktor Szakats
Closes #15175

configure: catch Apple in more target triplets

Before this patch, only these triplets were considered Apple:
`<cpu>-apple-darwin`

After this patch, these are also considered App

configure: catch Apple in more target triplets

Before this patch, only these triplets were considered Apple:
`<cpu>-apple-darwin`

After this patch, these are also considered Apple:
`<cpu>-apple-(ios*|tvos*|visionos*|watchos*|<ETC>)`

`$host_os` (the last third of the triplet) still has a valid use
to differentiate between OS flavours, though for now this isn't
used, aligning with CMake.

Closes #14728

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configure: fix indentation more

Follow-up to 0052b4b52dfbd6455a24dd95837e5236dc8e1f5d #14628

Closes #14682

tidy-up: spelling quiche and Rustls

Closes #14605

libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script

libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script does not detect
mbedtls through pkgconfig. mbedtls 3.6.0 now supports it.)

Skip dealing with gssapi in this patch.

Fixes #864
Closes #13911

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m4: reposition USE_RUSTLS="yes" for pkg-config

It's necessary to set this var to "yes" _after_ AC_DEFINE and AC_SUBST
in order for a later `test` to pass so that `check_for_ca_bundle=1`

m4: reposition USE_RUSTLS="yes" for pkg-config

It's necessary to set this var to "yes" _after_ AC_DEFINE and AC_SUBST
in order for a later `test` to pass so that `check_for_ca_bundle=1` ends
up being set. This is in turn required for the default CA certificate
bundle to be set when building w/ rustls & pkg-config.

Reported-by: Matt Jolly
Fixes #13248
Closes #13251

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m4: fix rustls pkg-config codepath

The previous pkg-config code would successfully detect rustls but did
not set all appropriate variables and call the right macros to properly
confi

m4: fix rustls pkg-config codepath

The previous pkg-config code would successfully detect rustls but did
not set all appropriate variables and call the right macros to properly
configure cURL.

Reported-by: kpcyrd on github
Fixes #13200
Closes #13202

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curl-rustls.m4: add pkg-config support to rustls detection

Based on the existing openssl pkg-config detection, this commit tries to
use pkg-config to find `rustls` then falls back to the

curl-rustls.m4: add pkg-config support to rustls detection

Based on the existing openssl pkg-config detection, this commit tries to
use pkg-config to find `rustls` then falls back to the current approach
if that fails.

We use the following logic:

- if no path is provided, just use pkg-config, if it's not there we have
a problem!
- if a path is provided, try pkg-config
+ if pkg-config fails, try and find rustls directly

Closes #13179

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tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add

tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add missing EOL at EOF.
- delete whitespace at EOL (except from expected test results).
- convert tabs to spaces.
- convert CRLF EOLs to LF in GHA yaml.
- text casing fixes in `./CMakeLists.txt`.
- fix a codespell typo in `packages/OS400/initscript.sh`.

Closes #11772

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copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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curl-rustls.m4: on macOS, rustls also needs the Security framework

Closes #9883

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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configure: add -lm to configure for rustls build.

Note: The list of libraries that rustc tells us we need to include is
longer, but also includes some more platform-specific libraries th

configure: add -lm to configure for rustls build.

Note: The list of libraries that rustc tells us we need to include is
longer, but also includes some more platform-specific libraries that I
am not sure how to effectively incorporate. Adding just -lm seems to
solve an immediate problem, so I'm adding just that.

Closes #8002

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vtls/rustls: update to compile with rustls-ffi v0.8.0

Some method names, as well as the generated library name, were changed
in a recent refactoring.

Further, change the default

vtls/rustls: update to compile with rustls-ffi v0.8.0

Some method names, as well as the generated library name, were changed
in a recent refactoring.

Further, change the default configuration instructions to check for
Hyper in either "target/debug" or "target/release" - the latter
contains an optimized build configuration.

Fixes #7947
Closes #7948

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rustls: remove native_roots fallback

For the commandline tool, we expect to be passed
SSL_CONN_CONFIG(CAfile); for library use, the use should pass a set of
trusted roots (like in ot

rustls: remove native_roots fallback

For the commandline tool, we expect to be passed
SSL_CONN_CONFIG(CAfile); for library use, the use should pass a set of
trusted roots (like in other TLS backends).

This also removes a dependency on Security.framework when building on
macOS.

Closes #7250

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rustls: switch read_tls and write_tls to callbacks

And update to 0.6.0, including a rename from session to connection for
many fields.

Closes #7071

m4: add security frameworks on Mac when compiling rustls

Previously compiling rustls on Mac would only complete if you also
compiled the SecureTransport TLS backend, which curl would pre

m4: add security frameworks on Mac when compiling rustls

Previously compiling rustls on Mac would only complete if you also
compiled the SecureTransport TLS backend, which curl would prefer to
the Rust backend.

Appending these flags to LDFLAGS makes it possible to compile the
Rustls backend on Mac without the SecureTransport backend, which means
this patch will make it possible for Mac users to use the Rustls
backend for TLS.

Reviewed-by: Jacob Hoffman-Andrews

Fixes #6955
Cloes #6956

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configure: split out each TLS library detector into its own function

... and put those functions in separate m4 files per TLS library.