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cmake: add support for versioned symbols option

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Implement the `--enable-versioned-symbols` feature available in
`./configure` for CMake.

Enable with `-DCURL_LIBCURL_VERSIONED_SYMBOLS=ON`. Customize the version
prefix with `-DCURL_LIBCURL_VERSIONED_SYMBOLS_PREFIX=MYPREFIX_`. By
default the prefix matches what autotools uses.

When enabled, the feature is detected and a warning shown if
unavailable. (E.g. on Apple and Windows, it isn't.)

Included `HIDDEN {};` to match autotools, though I don't know if it's
necessary, useful or making any difference.

Differences from the autotools implementation:
- soversion is dynamic instead of hard-coded.
- omits referencing non-curl symbols.
- allows prefix/flavour override.
- more universal feature detection.
- doesn't rely on the in-repo `lib/libcurl.vers.in` file.

Also:
- add mbedTLS and BearSSL versioned symbol prefix support to autotools.
- enable this option in an old-linux job.

Follow-up to 7cc2e8b349
Fixes #14349
Closes #14378
This commit is contained in:
Viktor Szakats 2024-08-04 13:52:44 +02:00
parent 573aaec3be
commit 7b14449790
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GPG key ID: B5ABD165E2AEF201
3 changed files with 51 additions and 3 deletions
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7
.github/workflows/linux-old.yml vendored
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@ -81,7 +81,8 @@ jobs:
run: |
mkdir bld-1
cd bld-1
cmake .. -DCMAKE_UNITY_BUILD=ON -DCURL_WERROR=ON -DBUILD_SHARED_LIBS=ON -DENABLE_ARES=OFF -DCURL_ZSTD=OFF -DCURL_USE_GSSAPI=OFF -DCURL_USE_LIBSSH2=ON -DCURL_USE_LIBSSH=OFF
cmake .. -DCMAKE_UNITY_BUILD=ON -DCURL_WERROR=ON -DBUILD_SHARED_LIBS=ON \
-DENABLE_ARES=OFF -DCURL_ZSTD=OFF -DCURL_USE_GSSAPI=OFF -DCURL_USE_LIBSSH2=ON -DCURL_USE_LIBSSH=OFF
make install
src/curl --disable --version
@ -89,7 +90,9 @@ jobs:
run: |
mkdir bld-cares
cd bld-cares
cmake .. -DCMAKE_UNITY_BUILD=ON -DCURL_WERROR=ON -DBUILD_SHARED_LIBS=ON -DENABLE_ARES=ON -DCURL_ZSTD=ON -DCURL_USE_GSSAPI=ON -DCURL_USE_LIBSSH2=OFF -DCURL_USE_LIBSSH=ON
cmake .. -DCMAKE_UNITY_BUILD=ON -DCURL_WERROR=ON -DBUILD_SHARED_LIBS=ON \
-DENABLE_ARES=ON -DCURL_ZSTD=ON -DCURL_USE_GSSAPI=ON -DCURL_USE_LIBSSH2=OFF -DCURL_USE_LIBSSH=ON \
-DCURL_LIBCURL_VERSIONED_SYMBOLS=ON
- name: 'build'
run: |