* Support older versions of CMake.
VERSION_GREATER_EQUAL is supported by CMake >=3.7:
https://cmake.org/cmake/help/latest/command/if.html#version-greater-equal
target_link_options() is supported by CMake >=3.13:
https://cmake.org/cmake/help/latest/command/target_link_options.html
* Use PROTOBUF_USE_DLLS and LIBPROTOC_EXPORTS for libprotoc.so shared library
Similar change for libprotobuf.so and libprotobuf-lite.so was made
in commit 5a0887fc65.
* Make value of PROTOC_EXPORT dependent on LIBPROTOC_EXPORTS instead of LIBPROTOBUF_EXPORTS
This was probably intention, and LIBPROTOC_EXPORTS is also used above
in _MSC_VER branch.
Soname was set for libprotobuf.so in commit a9cf69a0ed,
but similar changes for libprotobuf-lite.so and libprotoc.so were missed.
Fixes: #8635
Co-authored-by: Arfrever Frehtes Taifersar Arahesis <Arfrever@GMail.Com>
* add plugin options
* refactored comment message
* added tabs for better readability
* removed newlines as they are not working properly
* allow PROTOC_OPTIONS and EXPORT_MACRO in parallel for protobuf_generate
If `-Dprotobuf_USE_EXTERNAL_GTEST=ON` is passed to CMake, it will use an external Google Test copy (i.e. by calling `find_package(GTest REQUIRED)`) rather than the one provided as a submodule.
This makes sense for larger projects that might already include Google Test and want to use a more standard CMake approach.
Also updated build instructions with this information, and more idiomatic usage.
Co-authored-by: Adam Cozzette <acozzette@google.com>
Convenience feature: enable users to test via the familiar `ctest` command rather than making the `check` target.
They would be able to use the familiar CMake pattern:
```
cmake -S source/protobuf -B build/protobuf ...
cmake --build build/protobuf
ctest --test-dir build/protobuf
cmake --install build/protobuf
```
This is a follow-up to 9f447fc9d3da93da29b8301f1a8ca57b1ea812d7
This updates the CMake support to additionally symlink the soversion value
to the generated shared library when so generated. This aligns the
generated soversion with that traditionally used by the Makefile build
workflow and provides cross-compatibility irrespective of build approach
used.
The primary version of the non-symlink library retains the actual
(non-SO) project version for clarity and compatibility with
installations built using prior versions of CMake support. An example of
the net resulting symlink structures is shown below, where the most
important aspect is that the symlink matching the embedded SONAME is
present (libprotobuf.so.30 in the example case).
Makefile:
libprotobuf.so -> libprotobuf.so.30.0.0
libprotobuf.so.30 -> libprotobuf.so.30.0.0
libprotobuf.so.30.0.0
CMake:
libprotobuf.so -> libprotobuf.so.30
libprotobuf.so.30 -> libprotobuf.so.3.19.0.0
libprotobuf.so.3.19.0.0
Fixes: #8635
when using CMake >= 3.15, we use CMAKE_MSVC_RUNTIME_LIBRARY
to reproduce the /MT vs /MD when protobuf_MSVC_STATIC_RUNTIME
is TRUE or FALSE
MultiThreaded is for /MT
MultiThreadedDebug is for /MTd
MultiThreadedDLL is for /MD
MultiThreadedDebugDLL is for /MDd
Joshua Haberman
Arfrever Frehtes Taifersar Arahesis
Adam Cozzette
Matt Kulukundis
David L. Jones
Timo Lange
Florin Crișan
appledragon
Stephen Kennedy
JCooky
Joel Johnson
David Geldreich
owentou