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Documentation for Workaround for Conan's CMake private linking issue #644

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Sep 19, 2023
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Documentation for Workaround for Conan's CMake private linking issue #644

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b76315a
Add documentation for workaround for Conan's CMake private linking issue
PengZheng Sep 18, 2023
8d0dbb5
Refine the wording in building instructions
PengZheng Sep 18, 2023
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20 changes: 20 additions & 0 deletions documents/building/README.md
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Expand Up @@ -103,6 +103,26 @@ To see a complete overview of the available build options use the following comm
conan inspect . | grep build_
```

#### CMake Private Linking Workaround

When using Celix via Conan, you may encounter an [issue](https://github.com/apache/celix/issues/642) where libzip.so is not found by linker.
This is due to a [bug in Conan](https://github.com/conan-io/conan/issues/7192).

A workaround we adopt in Celix is adding the following to conanfile.py:

```python
def generate(self):
deps = CMakeDeps(self)
deps.generate()
tc = CMakeToolchain(self)
# the following is workaround for https://github.com/conan-io/conan/issues/7192
if self.settings.os == "Linux":
tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,--unresolved-symbols=ignore-in-shared-libs"
elif self.settings.os == "Macos":
tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,-undefined -Wl,dynamic_lookup"
tc.generate()
```

### Building Apache Celix directly using CMake
The following packages (libraries + headers) should be installed on your system:

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