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Description
Bug summary
It fails to build with Clang-15 and GCC-12
Clang:
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -O3 -march=x86-64 -mtune=generic -O2 -pipe -O3 -march=x86-64 -mtune=generic -O2 -pipe -D__USE_MINGW_ANSI_STDIO=1 -DPY_ARRAY_UNIQUE_SYMBOL=MPL_matplotlib_backends__tkagg_ARRAY_API -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -D__STDC_FORMAT_MACROS=1 -Iextern/agg24-svn/include -Isrc -ID:/M/msys64/clang64/lib/python3.10/site-packages/numpy/core/include -ID:/M/msys64/clang64/include/python3.10 -c src/_tkagg.cpp -o build/temp.mingw_x86_64_clang-3.10/matplotlib.backends._tkagg/src/_tkagg.o src/_tkagg.cpp:234:15: error: cannot initialize a variable of type 'void *' with an rvalue of type 'FARPROC' (aka 'long long (*)()') if (void* ptr = dlsym(lib, "Tcl_SetVar")) { ^ ~~~~~~~~~~~~~~~~~~~~~~~~ src/_tkagg.cpp:273:13: note: in instantiation of function template specialization 'load_tcl_tk<HINSTANCE__ *>' requested here if (load_tcl_tk(modules[i])) { ^ src/_tkagg.cpp:237:15: error: cannot initialize a variable of type 'void *' with an rvalue of type 'FARPROC' (aka 'long long (*)()') if (void* ptr = dlsym(lib, "Tk_FindPhoto")) { ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ src/_tkagg.cpp:240:15: error: cannot initialize a variable of type 'void *' with an rvalue of type 'FARPROC' (aka 'long long (*)()') if (void* ptr = dlsym(lib, "Tk_PhotoPutBlock")) { ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 errors generated.
GCC:
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -O3 -march=x86-64 -mtune=generic -O2 -pipe -O3 -march=x86-64 -mtune=generic -O2 -pipe -D__USE_MINGW_ANSI_STDIO=1 -DPY_ARRAY_UNIQUE_SYMBOL=MPL_matplotlib_backends__tkagg_ARRAY_API -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -D__STDC_FORMAT_MACROS=1 -Iextern/agg24-svn/include -Isrc -ID:/M/msys64/ucrt64/lib/python3.10/site-packages/numpy/core/include -ID:/M/msys64/ucrt64/include/python3.10 -c src/_tkagg.cpp -o build/temp.mingw_x86_64_ucrt-3.10/matplotlib.backends._tkagg/src/_tkagg.o src/_tkagg.cpp: In instantiation of 'bool load_tcl_tk(T) [with T = HINSTANCE__*]': src/_tkagg.cpp:273:24: required from here src/_tkagg.cpp:234:26: error: invalid conversion from 'FARPROC' {aka 'long long int (*)()'} to 'void*' [-fpermissive] 234 | if (void* ptr = dlsym(lib, "Tcl_SetVar")) { | ^ | | | FARPROC {aka long long int (*)()} src/_tkagg.cpp:237:26: error: invalid conversion from 'FARPROC' {aka 'long long int (*)()'} to 'void*' [-fpermissive] 237 | if (void* ptr = dlsym(lib, "Tk_FindPhoto")) { | ^ | | | FARPROC {aka long long int (*)()} src/_tkagg.cpp:240:26: error: invalid conversion from 'FARPROC' {aka 'long long int (*)()'} to 'void*' [-fpermissive] 240 | if (void* ptr = dlsym(lib, "Tk_PhotoPutBlock")) { | ^ | | | FARPROC {aka long long int (*)()}
Code for reproduction
Nocoderequired
Actual outcome
Building succeeds
Expected outcome
Building fails
Additional information
No response
Operating system
No response
Matplotlib Version
3.6.0
Matplotlib Backend
No response
Python version
3.10.7
Jupyter version
No response
Installation
No response