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macoscmakeshared-librariesld

Can't link to .so file on Mac with CMake

I'm working on a PHP 7 extension using Swig and am trying to link to libphp7.so. From my CMakeLists.txt file:

find_library(php7_lib php7 PATHS "/usr/local/Cellar/php/7.3.0/lib/httpd/modules" NO_DEFAULT_PATH)
target_link_libraries(navdb_php7_client_api ${php7_lib} dl)

But I get an error:

[100%] Linking CXX shared module .../lib/libnavdb_php7_client_api.so 
...
ld: can't link with bundle (MH_BUNDLE) only dylibs (MH_DYLIB) file '/usr/local/Cellar/php/7.3.0/lib/httpd/modules/libphp7.so' for architecture x86_64

The file I'm trying to link to:

$ file /usr/local/Cellar/php/7.3.0/lib/httpd/modules/libphp7.so
/usr/local/Cellar/php/7.3.0/lib/httpd/modules/libphp7.so: Mach-O 64-bit bundle x86_64

Any ideas on how to resolve this?

Solution

  • I found out how/what to do from this link: Clang and undefined symbols when building a library

    The libphp7.so doesn't need to be linked to at compile time, run-time works fine. This can be enabled by setting a CXX_FLAG (see the link for details).