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WxWidgets:Troubleshooting

lastmod 2016-03-24created 2014-09-047 edits

A summary of problems that can occur while using wsWidgets.

Undefined reference

When compiling statically (SHARED=0), messages like the following may be printed. 

gcc_lib/libwxmsw30u_core.a(corelib_app.o):app.cpp:(.text+0x5f52): undefined reference to `__imp_InitCommonControls'
gcc_lib/libwxmsw30u_core.a(corelib_app.o):app.cpp:(.text+0x5fa2): undefined reference to `__imp_OleUninitialize'

In this case, add the wxWidgets-related libraries as below. 

-lwxexpat -lwxjpeg -lwxmsw30u -lwxmsw30u_gl -lwxpng -lwxregexu -lwxscintilla -lwxtiff -lwxzlib

Additional libraries like the following may also be needed. 

-lkernel32 -luser32 -lgdi32 -lcomdlg32 -lwinspool -lwinmm -lshell32 -lcomctl32 -lole32 -loleaut32 -luuid -lrpcrt4 -ladvapi32 -lwsock32

MinGW w64 Compile error

The following error occurs during compilation. 

cc1plus.exe has stopped working.

The build was done in the following environment.

  • wxWidgets 3.00
  • MinGW32-w64
  • GCC v4.8.1
  • MSYS-1.0.18

There is advice to use PCH for this. 

You have to be using Precompiled header (wxprec.h or in my case sdk_precomp.h CB header that normally includes wxprec.h) to see the problem.
Headers that seem directly required to trigger problem are
"wx/msw/wrapcctl.h" and any one on the below headers
<wx/choicdlg.h>, <wx/filedlg.h>, <wx/slider.h>, or <wx/textdlg.h>.
The problem seemed worse when I replaced "wx/msw/wrapcctl.h" with "wx/msw/wrapshl.h" to test if it also caused a problem.

For the related issue, see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56926

In function _start: undefined reference to main

On Linux-family systems, the following may be printed as a compile error message. 

/usr/lib/gcc/x86_64-linux-gnu/4.4.3/../../../../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'

It means main cannot be found. There can be various causes, but check the following first.

  • Check whether a wxWidgets Entry Point such as IMPLEMENT_CLASS or IMPLEMENT_APP is set.
  • Check that IMPLEMENT_APP is not wrapped in a Namespace: it must be in no namespace. 
class Application : public wxApp {
// ...
};
IMPLEMENT_APP(Application)

C++11 linking

To compile with c++11, use environment variables as below. 

CXXFLAGS="-stdlib=libc++ -std=c++11"
OBJCXXFLAGS="-stdlib=libc++ -std=c++11"
CPPFLAGS="-stdlib=libc++"
LDFLAGS="-stdlib=libc++"
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