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[lldb] Add a cmake warning about the python/swig incompatibility

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Raise awareness of the fact that some versions of swig and python (and
build types) just don't mix.

One day this will be a reason to require swig>=4.0, but this version is
too hot off the press right now..

Differential Revision: https://reviews.llvm.org/D88967
This commit is contained in:
Pavel Labath 2020-10-07 16:36:32 +02:00
parent 4424d2428a
commit d4a7c70751
1 changed files with 11 additions and 0 deletions
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11
lldb/cmake/modules/FindPythonAndSwig.cmake
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@ -45,6 +45,17 @@ else()
message(STATUS "SWIG 2 or later is required for Python support in LLDB but could not be found")
endif()
get_property(MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if ("${Python3_VERSION}" VERSION_GREATER_EQUAL "3.7" AND
"${SWIG_VERSION}" VERSION_LESS "4.0" AND WIN32 AND (
${MULTI_CONFIG} OR (${uppercase_CMAKE_BUILD_TYPE} STREQUAL "DEBUG")))
# Technically this can happen with non-Windows builds too, but we are not
# able to detect whether Python was built with assertions, and only Windows
# has the requirement that Debug LLDB must use Debug Python.
message(WARNING "Debug builds of LLDB are likely to be unusable due to "
"<https://github.com/swig/swig/issues/1321>. Please use SWIG >= 4.0.")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(PythonAndSwig
FOUND_VAR