🚸 Building Shared Libraries

cmake/CompilerOptions.cmake

@@ -53,10 +53,6 @@ function(enable_project_options target_name)
 
   option(BINDINGS "Configure for building Python bindings")
   if(BINDINGS)
-    check_cxx_compiler_flag(-fvisibility=hidden HAS_VISIBILITY_HIDDEN)
-    if(HAS_VISIBILITY_HIDDEN)
-      target_compile_options(${target_name} INTERFACE -fvisibility=hidden)
-    endif()
     include(CheckPIESupported)
     check_pie_supported()
     set_target_properties(${target_name} PROPERTIES INTERFACE_POSITION_INDEPENDENT_CODE ON)

cmake/StandardProjectSettings.cmake

@@ -63,3 +63,8 @@ if(DEPLOY)
       "10.15"
       CACHE STRING "" FORCE)
 endif()
+
+# On Windows, export all symbols by default
+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS
+    ON
+    CACHE BOOL "Export all symbols on Windows")

include/mqt-core/dd/RealNumber.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "dd/DDDefinitions.hpp"
+#include "mqt_core_export.h"
 
 #include <istream>
 #include <limits>
@@ -230,11 +231,11 @@ struct RealNumber {
 namespace constants {
 // NOLINTBEGIN(cppcoreguidelines-avoid-non-const-global-variables)
 /// The constant zero.
-extern RealNumber zero;
+MQT_CORE_EXPORT extern RealNumber zero;
 /// The constant one.
-extern RealNumber one;
+MQT_CORE_EXPORT extern RealNumber one;
 /// The constant sqrt(2)/2 = 1/sqrt(2).
-extern RealNumber sqrt2over2;
+MQT_CORE_EXPORT extern RealNumber sqrt2over2;
 // NOLINTEND(cppcoreguidelines-avoid-non-const-global-variables)
 
 /**

pyproject.toml

@@ -90,8 +90,6 @@ build-dir = "build/{wheel_tag}"
 # Explicitly set the package directory
 wheel.packages = ["src/mqt"]
 
-install.components = ["mqt-core_Python"]
-
 metadata.version.provider = "scikit_build_core.metadata.setuptools_scm"
 sdist.include = ["src/mqt/core/_version.py"]
 sdist.exclude = [
@@ -114,12 +112,20 @@ git-only = [
 [tool.scikit-build.cmake.define]
 BUILD_MQT_CORE_BINDINGS = "ON"
 BUILD_MQT_CORE_TESTS = "OFF"
+BUILD_SHARED_LIBS = "ON"
 
 
 [tool.setuptools_scm]
 write_to = "src/mqt/core/_version.py"
 
 
+[tool.check-wheel-contents]
+ignore = [
+    "W002",
+    "W004",
+]
+
+
 [tool.pytest.ini_options]
 minversion = "7.0"
 addopts = ["-ra", "--strict-markers", "--strict-config"]
@@ -285,5 +291,5 @@ environment = { MACOSX_DEPLOYMENT_TARGET = "10.15" }
 
 [tool.cibuildwheel.windows]
 before-build = "pip install delvewheel"
-repair-wheel-command = "delvewheel repair -w {dest_dir} {wheel}"
+repair-wheel-command = "delvewheel repair -w {dest_dir} {wheel} --namespace-pkg mqt"
 environment = { CMAKE_GENERATOR = "Ninja" }

src/CMakeLists.txt

@@ -160,29 +160,6 @@ add_subdirectory(ecc)
 # add NA library
 add_subdirectory(na)
 
-# ** Note ** The following target will soon be removed from the project. All top-level projects
-# should switch to using the mqt-core Python package.
-if(BINDINGS AND NOT TARGET mqt-core-python)
-  # add Python interface library
-  add_library(
-    ${MQT_CORE_TARGET_NAME}-python ${MQT_CORE_INCLUDE_BUILD_DIR}/python/qiskit/QuantumCircuit.hpp
-                                   python/qiskit/QuantumCircuit.cpp)
-
-  # link with main project library and pybind11 libraries
-  target_link_libraries(${MQT_CORE_TARGET_NAME}-python PUBLIC MQT::Core pybind11::pybind11)
-  target_link_libraries(${MQT_CORE_TARGET_NAME}-python PRIVATE MQT::ProjectOptions
-                                                               MQT::ProjectWarnings)
-
-  # add MQT alias
-  add_library(MQT::CorePython ALIAS ${MQT_CORE_TARGET_NAME}-python)
-  set_target_properties(
-    ${MQT_CORE_TARGET_NAME}-python
-    PROPERTIES VERSION ${PROJECT_VERSION}
-               SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
-               EXPORT_NAME CorePython)
-  list(APPEND MQT_CORE_TARGETS ${MQT_CORE_TARGET_NAME}-python)
-endif()
-
 if(BUILD_MQT_CORE_BINDINGS)
   add_subdirectory(python)
 endif()

src/mqt/core/__init__.py

@@ -2,6 +2,17 @@
 
 from __future__ import annotations
 
+import sys
+
+# under Windows, make sure to add the appropriate DLL directory to the PATH
+if sys.platform == "win32":
+    import os
+    import sysconfig
+    from pathlib import Path
+
+    bin_dir = Path(sysconfig.get_paths()["purelib"]) / "mqt" / "core" / "bin"
+    os.add_dll_directory(str(bin_dir))
+
 from ._core import Permutation, QuantumComputation
 from ._version import version as __version__
 from ._version import version_tuple as version_info