Complilation error on Windows with MSYS2 MINGW64 (Issue #26703)
FredCL13
FredCL13 created an issue (wxWidgets/wxWidgets#26703)Build System Used
I build wxWidgets and/or my application using:
[3.6.3-3] MSYS2 MINGW64
[15.1.0-5] mingw-w64-ucrt-x86_64-gcc
configure is luanched as :
../configure CFLAGS="-static" --with-msw --enable-monolithic --disable-shared
and after make
Description
When compiling i encoutered two errors:
1 - In file include/wx/defs.h in function inline wxUIntPtr wxPtrToUInt(const void p)
../include/wx/defs.h:956:12: error: cast from 'const void' to 'wxUIntPtr' {aka 'long unsigned int'} loses precision [-fpermissive]
956 | return reinterpret_cast(p);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make: *** [Makefile:20110: monolib_any.o] Error 1
To solve the issue I 've patched the line :
return reinterpret_cast(p);
by:
#if defined(GNUC) && defined(MINGW64)
// GCC MinGW64 rejects reinterpret_cast(p)
// We use uintptr_t instead, which provides a standard and safe conversion
return static_cast(reinterpret_cast<uintptr_t>(p));
#else
// Original code for MSVC, ICC, Clang, Linux, macOS, etc.
return reinterpret_cast(p);
#endif
2 - In file src/msw/glcanvas.cpp in function
../src/msw/glcanvas.cpp:630:25: error: cast from 'void (*)()' to 'wxIntPtr' {aka 'long int'} loses precision [-fpermissive]
630 | const auto ptrVal = reinterpret_cast(ptr);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make: *** [Makefile:34648: gllib_msw_glcanvas.o] Error 1
To solve the issue I've patched the line :
const auto ptrVal = reinterpret_cast(ptr);
by:
#if defined(GNUC) && defined(MINGW64)
// GCC MinGW64 rejects reinterpret_cast(ptr)
// We use intptr_t instead, which provides a standard and safe conversion
const auto ptrVal = static_cast(reinterpret_cast<intptr_t>(ptr));
#else
// Original code for MSVC, ICC, Clang, GCC Linux, etc.
const auto ptrVal = reinterpret_cast(ptr);
#endif
Platform and version information
- wxWidgets version : 3.3.3
- wxWidgets port wxMSW
- Windows 11 25H2 build 26200.8875 pack 1000.26100.334.0
- Compiler mingw-w64-ucrt-x86_64-gcc 15.1.0-5
for information I don't encoutered the problem when I've compiled on Linux (standard compilation ../configure + make)
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FredCL13
FredCL13 left a comment (wxWidgets/wxWidgets#26703)It seem that Github remove some characters in my post:
the patches start by :
#if defined(__GNUC__) && defined(__MINGW64__)So first patch for defs.h
#if defined(__GNUC__) && defined(__MINGW64__) // GCC MinGW64 rejects reinterpret_cast<wxIntPtr>(p)
// We use uintptr_t instead, which provides a standard and safe conversion
return static_cast<wxUIntPtr>(reinterpret_cast<uintptr_t>(p));
#else
// Original code for MSVC, ICC, Clang, Linux, macOS, etc.
return reinterpret_cast<wxUIntPtr>(p);
#endifSecond patch for glcanvas.cpp
#if defined(__GNUC__) && defined(__MINGW64__) // GCC MinGW64 rejects reinterpret_cast<wxIntPtr>(ptr)
// We use intptr_t instead, which provides a standard and safe conversion
const auto ptrVal = static_cast<wxIntPtr>(reinterpret_cast<intptr_t>(ptr));
#else
// Original code for MSVC, ICC, Clang, GCC Linux, etc.
const auto ptrVal = reinterpret_cast<wxIntPtr>(ptr);
#endifI encoutered also some warning:
../src/generic/filectrlg.cpp: In member function 'virtual void wxFileListCtrl::UpdateItem(const wxListItem&)':
../src/generic/filectrlg.cpp:469:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
469 | wxFileData fd = (wxFileData)GetItemData(item);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/generic/filectrlg.cpp: In member function 'void wxFileListCtrl::FreeItemData(wxListItem&)':
../src/generic/filectrlg.cpp:711:26: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
711 | wxFileData fd = (wxFileData)item.m_data;
| ^~~~~~~~~~~~~~~~~~~~~~~~
../src/generic/filectrlg.cpp: In member function 'void wxFileListCtrl::OnListEndLabelEdit(wxListEvent&)':
../src/generic/filectrlg.cpp:744:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
744 | wxFileData fd = (wxFileData)event.m_item.m_data;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'void* wxStyledTextCtrl::GetDirectFunction() const':
../src/stc/stc.cpp:2020:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
2020 | return (void*)SendMsg(SCI_GETDIRECTFUNCTION);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'void* wxStyledTextCtrl::GetDirectPointer() const':
../src/stc/stc.cpp:2026:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
2026 | return (void*)SendMsg(SCI_GETDIRECTPOINTER);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'void* wxStyledTextCtrl::GetDocPointer()':
../src/stc/stc.cpp:3168:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
3168 | return (void*)SendMsg(SCI_GETDOCPOINTER);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'void* wxStyledTextCtrl::CreateDocument()':
../src/stc/stc.cpp:3294:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
3294 | return (void*)SendMsg(SCI_CREATEDOCUMENT);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'const char* wxStyledTextCtrl::GetCharacterPointer() const':
../src/stc/stc.cpp:3998:12: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
3998 | return (const char*)SendMsg(SCI_GETCHARACTERPOINTER, 0, 0);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/stc/stc.cpp: In member function 'const char* wxStyledTextCtrl::GetRangePointer(int, int) const':
../src/stc/stc.cpp:4005:12: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
4005 | return (const char*)SendMsg(SCI_GETRANGEPOINTER, position, rangeLength);
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PB
PBfordev left a comment (wxWidgets/wxWidgets#26703)wxWidgets 3.3.3 provides binaries for GCC v14.2 and v16.1 but not v15.
I wonder if this is GCC-version specific; wxWidgets 3.3.2 had binaries for GCC 15.2 and wxPtrToUInt() does not seem to have changed since...
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FredCL13
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FredCL13
FredCL13 left a comment (wxWidgets/wxWidgets#26703)It seems that the issue was caused by my antivirus during the configure step.
After disabling the antivirus, deleting the generated files, and running configure and make again, everything worked correctly.
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