fix/python

[jcelerier]

• python: build fixes
• python: start adding api configurations

[pstiasny]

Thanks! That clears the previous errors but looks like I'm missing a boost lib (I have boost 1.87.0 installed from brew):

/Users/pawel/clones/libremidi/bindings/python/pylibremidi.cpp:3:10: fatal error: 'boost/variant2.hpp' file not found
    3 | #include <boost/variant2.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~

[jcelerier]

boost/variant2 has been there for many releases, I'd assume that it is getting an older version from somewhere on your hard drive. Did you try brew cleanup maybe to remove old versions ? otherwise can you share the result $ grep -i boost CMakeCache.txt ? it should tell all the folders in which it's looking for it

[pstiasny]

$ grep -i boost CMakeCache.txt
//Actively look for Boost
LIBREMIDI_FIND_BOOST:BOOL=OFF
//Do not use Boost if available
LIBREMIDI_NO_BOOST:BOOL=OFF

Overriding with cmake -DLIBREMIDI_FIND_BOOST=1 . made it find the directory correctly.

However, I'm now encountering another dependency issue:

/Users/pawel/clones/libremidi/bindings/python/pylibremidi.cpp:13:10: fatal error: 'readerwriterqueue.h' file not found
   13 | #include <readerwriterqueue.h>
      |          ^~~~~~~~~~~~~~~~~~~~~
1 error generated.

I tried adding a directive to CMakeLists as in here - does not seem to make a difference.

[jcelerier]

for this last one it's strange, CMake should download it on its own. It does when I test on Linux. will try on mac later.

[pstiasny]

Got a successfull build with this change:

diff --git a/bindings/python/CMakeLists.txt b/bindings/python/CMakeLists.txt
index f914daa..58d2334 100644
--- a/bindings/python/CMakeLists.txt
+++ b/bindings/python/CMakeLists.txt
@@ -12,5 +12,16 @@ FetchContent_Declare(
 )

 FetchContent_MakeAvailable(nanobind)
+
+FetchContent_Declare(
+  readerwriterqueue
+  GIT_REPOSITORY https://github.com/cameron314/readerwriterqueue
+  GIT_TAG        master
+)
+
+FetchContent_MakeAvailable(readerwriterqueue)
+
+
 nanobind_add_module(pylibremidi pylibremidi.cpp)
 target_link_libraries(pylibremidi PUBLIC libremidi)
+target_include_directories(pylibremidi PUBLIC SYSTEM $<BUILD_INTERFACE:${readerwriterqueue_SOURCE_DIR}>)

[jcelerier]

ahh I see ! this code is already in libremidi but right now it only triggered on linux : https://github.com/celtera/libremidi/blob/master/cmake/libremidi.deps.cmake#L38

will just enable it unconditonally