M2/Macaulay2/e/CMakeLists.txt: Build shared library libM2-engine

[mkoeppe]

No description provided.

[mkoeppe]

/usr/bin/ld: Macaulay2/e/mathicgb/libmathicgb.a(TypicalReducer.cpp.o): warning: relocation against `_ZN3mgb14TypicalReducer10insertTailENS_12NewConstTermERKNS_4PolyE' in read-only section `.text'
/usr/bin/ld: Macaulay2/e/memtailor/libmemtailor.a(Arena.cpp.o): relocation R_X86_64_PC32 against symbol `_ZTISt9bad_alloc@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC

[mahrud]

Ah, -fPIC issues are the bane of my existence. It's almost like they cannot be fixed on all platforms simultaneously!

[mkoeppe]

Well it is building these libs static despite the -DBUILD_SHARED_LIBS=ON.

[19/427] Linking CXX static library Macaulay2/e/memtailor/libmemtailor.a

[mahrud]

This is fine for testing, but I presume you're planning on making pull requests on https://github.com/Macaulay2/mathic, etc. eventually?

[mkoeppe]

The build on Ubuntu works:

[424/427] Linking CXX executable usr-dist/x86_64-Linux-Ubuntu-24.04/bin/M2-binary
-- Linked libraries:
	linux-vdso.so.1 (0x00007fed5fc43000)
	libM2-engine.so => /home/runner/work/M2/M2/M2/BUILD/build/Macaulay2/e/libM2-engine.so (0x00007fed5ec00000)
	libmathicgb.so => /home/runner/work/M2/M2/M2/BUILD/build/Macaulay2/e/mathicgb/libmathicgb.so (0x00007fed5fb19000)
	libmathic.so => /home/runner/work/M2/M2/M2/BUILD/build/Macaulay2/e/mathic/libmathic.so (0x00007fed5fafc000)
	libmemtailor.so => /home/runner/work/M2/M2/M2/BUILD/build/Macaulay2/e/memtailor/libmemtailor.so (0x00007fed5faf7000)
...

https://github.com/Macaulay2/M2/actions/runs/26052591173/job/76592810597?pr=4319#step:10:784

[mkoeppe]

On macOS, there is a problem:

Undefined symbols for architecture arm64:
  "_TS_Get_Local", referenced from:
      system_interrupted() in interrupted.cpp.o
  "_interrupts_interruptedFlag_id", referenced from:
      system_interrupted() in interrupted.cpp.o
ld: symbol(s) not found for architecture arm64

https://github.com/Macaulay2/M2/actions/runs/26052591173/job/76592810598?pr=4319#step:10:514

[mkoeppe]

These symbols are defined by M2-supervisor, which is linked only into M2-interpreter, but not into M2-engine

[mkoeppe]

/usr/bin/ld: Macaulay2/system/CMakeFiles/M2-supervisor.dir/tests.cpp.o: warning: relocation against `interrupts_interruptedFlag_id' in read-only section `.text'
/usr/bin/ld: Macaulay2/system/CMakeFiles/M2-supervisor.dir/supervisor.cpp.o: relocation R_X86_64_PC32 against symbol `interpThread' can not be used when making a shared object; recompile with -fPIC

[mkoeppe]

[21/428] Linking CXX shared library Macaulay2/system/libM2-supervisor.dylib
FAILED: [code=1] Macaulay2/system/libM2-supervisor.dylib 
: && /opt/homebrew/opt/ccache/libexec/clang++ -nostdinc++ -isystem /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1 -isystem /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -O3 -DNDEBUG -arch arm64 -dynamiclib -Wl,-headerpad_max_install_names -L/opt/homebrew/lib     -L/opt/homebrew/opt/libomp/lib     -L/opt/homebrew/opt/readline/lib -g -L/Users/runner/work/M2/M2/M2/BUILD/build/usr-host/lib -o Macaulay2/system/libM2-supervisor.dylib -install_name @rpath/libM2-supervisor.dylib Macaulay2/system/CMakeFiles/M2-supervisor.dir/supervisor.cpp.o Macaulay2/system/CMakeFiles/M2-supervisor.dir/m2file.cpp.o Macaulay2/system/CMakeFiles/M2-supervisor.dir/tests.cpp.o  /opt/homebrew/lib/libgc.dylib && :
Undefined symbols for architecture arm64:
  "_stdio0_newDefaultFileOutputSyncState", referenced from:
      _M2File_GetState in m2file.cpp.o
  "_thread_prepare_list", referenced from:
      SupervisorThread::threadEntryPoint() in supervisor.cpp.o
ld: symbol(s) not found for architecture arm64

[mkoeppe]

These symbols are defined in the interpreter.