Try making installing exports optional.

Author: adalisk-emikhaylov

source/non_limited_api/CMakeLists.txt

@@ -18,7 +18,7 @@ else()
   find_package(Python REQUIRED COMPONENTS Interpreter Development)
 endif()
 
-option(PYBIND11_NONLIMITEDAPI_BUILD_STUBS "" ON)
+option(PYBIND11_NONLIMITEDAPI_BUILD_STUBS "Build the stubs library." ON)
 
 set(PYBIND11_NONLIMITEDAPI_PYTHON_MIN_VERSION_HEX "" CACHE STRING "A hex Python version to bake into the library, e.g. `0x030800f0` for 3.8 (the `f0` suffix is always there and means a release version).")
 set(PYBIND11_NONLIMITEDAPI_SUFFIX "" CACHE STRING "A custom suffix to append to the built library name. Should normally be `[_AppName][_X.Y]`, where X,Y is the Python version.")
@@ -29,6 +29,8 @@ include(GNUInstallDirs)
 set(PYBIND11_NONLIMITEDAPI_INSTALL_LIBDIR_STUBS "${CMAKE_INSTALL_LIBDIR}" CACHE PATH "Where to install the stub library.")
 set(PYBIND11_NONLIMITEDAPI_INSTALL_LIBDIR_SHIMS "${CMAKE_INSTALL_LIBDIR}" CACHE PATH "Where to install the shim library.")
 
+option(PYBIND11_NONLIMITEDAPI_INSTALL_EXPORTS "Whether to install the cmake configs for our libraries." OFF)
+
 if (${PYBIND11_NONLIMITEDAPI_BUILD_STUBS})
   project(pybind11nonlimitedapi_stubs)
   add_library(${PROJECT_NAME} SHARED non_limited_api_stubs.cpp)
@@ -50,11 +52,13 @@ if (${PYBIND11_NONLIMITEDAPI_BUILD_STUBS})
     LIBRARY DESTINATION ${PYBIND11_NONLIMITEDAPI_INSTALL_LIBDIR_STUBS}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
   )
-  install(
-    EXPORT ${PROJECT_NAME}
-    NAMESPACE pybind11nonlimitedapi::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pybind11nonlimitedapi/cmake
-  )
+  if (PYBIND11_NONLIMITEDAPI_INSTALL_EXPORTS)
+    install(
+      EXPORT ${PROJECT_NAME}
+      NAMESPACE pybind11nonlimitedapi::
+      DESTINATION ${CMAKE_INSTALL_LIBDIR}/pybind11nonlimitedapi/cmake
+    )
+  endif()
 
   if (APPLE)
     target_link_options(${PROJECT_NAME} PRIVATE -undefined dynamic_lookup)
@@ -87,9 +91,11 @@ else()
     LIBRARY DESTINATION ${PYBIND11_NONLIMITEDAPI_INSTALL_LIBDIR_SHIMS}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
   )
-  install(
-    EXPORT ${PROJECT_NAME}
-    NAMESPACE pybind11nonlimitedapi::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pybind11nonlimitedapi/cmake
-  )
+  if (PYBIND11_NONLIMITEDAPI_INSTALL_EXPORTS)
+    install(
+      EXPORT ${PROJECT_NAME}
+      NAMESPACE pybind11nonlimitedapi::
+      DESTINATION ${CMAKE_INSTALL_LIBDIR}/pybind11nonlimitedapi/cmake
+    )
+  endif()
 endif()