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fix: Mingw64 corrected and add a CI job to test it (#3132)
* mingw64 platform string is like mingw_xxx not "mingw" See https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-python/0099-Change-the-get_platform-method-in-sysconfig-and-dist.patch * Mingw: Do not dllexport exceptions This is a fix for errors like: D:/a/pybind11/pybind11/include/pybind11/detail/common.h:735:23: error: 'dllexport' implies default visibility, but 'class pybind11::builtin_exception' has already been declared with a different visibility 735 | class PYBIND11_EXPORT builtin_exception : public std::runtime_error { | ^~~~~~~~~~~~~~~~~ * GHA: Test Mingw64 build * fix: avoid thin binaries on mingw * fix: drop lto on MinGW * Mingw64: disable PYBIND11_DEPRECATED It trigger many warnings for unknown reasons Co-authored-by: Henry Schreiner <henryschreineriii@gmail.com>
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.github/workflows/ci.yml
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31
.github/workflows/ci.yml
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@ -859,3 +859,34 @@ jobs:
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- name: Run all checks
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- name: Run all checks
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run: cmake --build build -t check
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run: cmake --build build -t check
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mingw:
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runs-on: windows-latest
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defaults:
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run:
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shell: msys2 {0}
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steps:
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- uses: msys2/setup-msys2@v2
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with:
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install: >-
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mingw-w64-x86_64-gcc
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mingw-w64-x86_64-python-pip
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mingw-w64-x86_64-cmake
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mingw-w64-x86_64-make
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mingw-w64-x86_64-python-pytest
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mingw-w64-x86_64-eigen3
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mingw-w64-x86_64-boost
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mingw-w64-x86_64-catch
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- uses: actions/checkout@v1
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- name: Configure
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# LTO leads to many undefined reference like
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# `pybind11::detail::function_call::function_call(pybind11::detail::function_call&&)
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run: cmake -G "MinGW Makefiles" -S . -B build
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- name: Build
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run: cmake --build build -j 2
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- name: Python tests
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run: cmake --build build --target pytest
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@ -89,13 +89,27 @@
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# endif
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# endif
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#endif
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#endif
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#if !defined(PYBIND11_EXPORT_EXCEPTION)
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# ifdef __MINGW32__
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// workaround for:
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// error: 'dllexport' implies default visibility, but xxx has already been declared with a different visibility
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# define PYBIND11_EXPORT_EXCEPTION
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# else
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# define PYBIND11_EXPORT_EXCEPTION PYBIND11_EXPORT
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# endif
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#endif
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#if defined(_MSC_VER)
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#if defined(_MSC_VER)
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# define PYBIND11_NOINLINE __declspec(noinline)
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# define PYBIND11_NOINLINE __declspec(noinline)
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#else
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#else
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# define PYBIND11_NOINLINE __attribute__ ((noinline))
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# define PYBIND11_NOINLINE __attribute__ ((noinline))
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#endif
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#endif
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#if defined(PYBIND11_CPP14)
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#if defined(__MINGW32__)
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// For unknown reasons all PYBIND11_DEPRECATED member trigger a warning when declared
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// whether it is used or not
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# define PYBIND11_DEPRECATED(reason)
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#elif defined(PYBIND11_CPP14)
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# define PYBIND11_DEPRECATED(reason) [[deprecated(reason)]]
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# define PYBIND11_DEPRECATED(reason) [[deprecated(reason)]]
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#else
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#else
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# define PYBIND11_DEPRECATED(reason) __attribute__((deprecated(reason)))
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# define PYBIND11_DEPRECATED(reason) __attribute__((deprecated(reason)))
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@ -740,7 +754,7 @@ PYBIND11_NAMESPACE_END(detail)
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# pragma warning(disable: 4275) // warning C4275: An exported class was derived from a class that wasn't exported. Can be ignored when derived from a STL class.
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# pragma warning(disable: 4275) // warning C4275: An exported class was derived from a class that wasn't exported. Can be ignored when derived from a STL class.
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#endif
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#endif
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/// C++ bindings of builtin Python exceptions
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/// C++ bindings of builtin Python exceptions
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class PYBIND11_EXPORT builtin_exception : public std::runtime_error {
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class PYBIND11_EXPORT_EXCEPTION builtin_exception : public std::runtime_error {
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public:
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public:
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using std::runtime_error::runtime_error;
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using std::runtime_error::runtime_error;
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/// Set the error using the Python C API
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/// Set the error using the Python C API
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@ -751,7 +765,7 @@ public:
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#endif
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#endif
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#define PYBIND11_RUNTIME_EXCEPTION(name, type) \
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#define PYBIND11_RUNTIME_EXCEPTION(name, type) \
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class PYBIND11_EXPORT name : public builtin_exception { public: \
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class PYBIND11_EXPORT_EXCEPTION name : public builtin_exception { public: \
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using builtin_exception::builtin_exception; \
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using builtin_exception::builtin_exception; \
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name() : name("") { } \
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name() : name("") { } \
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void set_error() const override { PyErr_SetString(type, what()); } \
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void set_error() const override { PyErr_SetString(type, what()); } \
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@ -327,7 +327,7 @@ PYBIND11_NAMESPACE_END(detail)
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/// thrown to propagate python-side errors back through C++ which can either be caught manually or
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/// thrown to propagate python-side errors back through C++ which can either be caught manually or
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/// else falls back to the function dispatcher (which then raises the captured error back to
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/// else falls back to the function dispatcher (which then raises the captured error back to
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/// python).
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/// python).
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class PYBIND11_EXPORT error_already_set : public std::runtime_error {
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class PYBIND11_EXPORT_EXCEPTION error_already_set : public std::runtime_error {
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public:
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public:
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/// Constructs a new exception from the current Python error indicator, if any. The current
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/// Constructs a new exception from the current Python error indicator, if any. The current
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/// Python error indicator will be cleared.
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/// Python error indicator will be cleared.
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@ -59,8 +59,7 @@ except ImportError:
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import distutils.errors
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import distutils.errors
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import distutils.ccompiler
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import distutils.ccompiler
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WIN = sys.platform.startswith("win32") and "mingw" not in sysconfig.get_platform()
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WIN = sys.platform.startswith("win32") and sysconfig.get_platform() != "mingw"
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PY2 = sys.version_info[0] < 3
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PY2 = sys.version_info[0] < 3
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MACOS = sys.platform.startswith("darwin")
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MACOS = sys.platform.startswith("darwin")
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STD_TMPL = "/std:c++{}" if WIN else "-std=c++{}"
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STD_TMPL = "/std:c++{}" if WIN else "-std=c++{}"
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@ -4,7 +4,7 @@
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// shared exceptions for cross_module_tests
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// shared exceptions for cross_module_tests
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class PYBIND11_EXPORT shared_exception : public pybind11::builtin_exception {
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class PYBIND11_EXPORT_EXCEPTION shared_exception : public pybind11::builtin_exception {
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public:
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public:
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using builtin_exception::builtin_exception;
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using builtin_exception::builtin_exception;
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explicit shared_exception() : shared_exception("") {}
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explicit shared_exception() : shared_exception("") {}
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@ -302,13 +302,18 @@ function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerfla
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endfunction()
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endfunction()
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function(_pybind11_generate_lto target prefer_thin_lto)
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function(_pybind11_generate_lto target prefer_thin_lto)
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if(MINGW)
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message(STATUS "${target} disabled (problems with undefined symbols for MinGW for now)")
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return()
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endif()
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if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
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if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
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set(cxx_append "")
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set(cxx_append "")
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set(linker_append "")
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set(linker_append "")
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE)
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE)
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# Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it
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# Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it
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set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>")
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set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>")
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND NOT MINGW)
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set(cxx_append ";-fno-fat-lto-objects")
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set(cxx_append ";-fno-fat-lto-objects")
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endif()
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endif()
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