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Debug Builds: -DPy_DEBUG (#1438)

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builds against a python debug library were unreliable and
could lead to symbol errors during linking.

Setting the `Py_DEBUG` define is necessary when linking
against a debug build:

https://stackoverflow.com/questions/39161202/how-to-work-around-missing-pymodule-create2-in-amd64-win-python35-d-lib

https://docs.python.org/2/c-api/intro.html#debugging-builds

https://docs.python.org/3.6/c-api/intro.html#debugging-builds
This commit is contained in:
Axel Huebl 2018-08-29 13:18:43 +02:00 committed by Wenzel Jakob
parent e0f3a766e9
commit 3a94561c4d
1 changed files with 7 additions and 0 deletions
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7
tools/pybind11Tools.cmake
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@ -135,6 +135,13 @@ function(pybind11_add_module target_name)
PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config
PRIVATE ${PYTHON_INCLUDE_DIRS})
# Python debug libraries expose slightly different objects
# https://docs.python.org/3.6/c-api/intro.html#debugging-builds
# https://stackoverflow.com/questions/39161202/how-to-work-around-missing-pymodule-create2-in-amd64-win-python35-d-lib
if(PYTHON_IS_DEBUG)
target_compile_definitions(${target_name} PRIVATE Py_DEBUG)
endif()
# The prefix and extension are provided by FindPythonLibsNew.cmake
set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")