1.5 Win32/gcc build error

[Mel]

bad news... Irrlicht 1.5 from the SVN doesn't compile well in win32-gcc. I thought at first it was because i didn't have the library, so i run the make on its own, outside DevCPP, and even tried to used the makefile for Linux, in both sides, and it gave me this error:

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g++ -Wall -pipe -g -D_DEBUG -I../../include -Izlib -Ijpeglib -Ilibpng -DIRRLICHT
_EXPORTS=1 -DIRR_COMPILE_WITH_DX9_DEV_PACK -D__GNUWIN32__ -D_WIN32 -DWIN32 -D_WI
NDOWS -D_MBCS -D_USRDLL  -c -o Irrlicht.o Irrlicht.cpp
Irrlicht.cpp:44: error: external linkage required for symbol 'irr::core::Identit
yMatrix' because of 'dllexport' attribute.
make: *** [Irrlicht.o] Error 1

[zeroZshadow]

same here, both on devcpp and code::blocks

[rogerborg]

Thanks for the report. It looks like I was a bit too keen with the exporting. SVN 1902 might fix this, but I don't have a Win32 gcc compiler, so I can't be sure. If it doesn't, then I'll revert the whole change that caused this. Sorry for the inconvenience.

[Acki]

SVN 1902 might fix this, but I don't have a Win32 gcc compiler, so I can't be sure.

what is the fix, so we can test it...

[Mel]

I'll update and test whenever it is availbale. Thanks!

[hybrid]

SVN 1902 might fix this, but I don't have a Win32 gcc compiler, so I can't be sure.

what is the fix, so we can test it...

He explicitly states that SVN 1902 is the fix

[zeroZshadow]

just checked it on rev 1902 with devc++
still the same error about IdentityMatrix

Yup same with code::blocks

the whole buildlog:

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||=== Irrlicht, Release ===|
C:\consoledev\irrlicht-svn\source\Irrlicht\CImageLoaderJPG.cpp||In member function `virtual irr::video::IImage* irr::video::CImageLoaderJPG::loadImage(irr::io::IReadFile*) const':|
C:\consoledev\irrlicht-svn\source\Irrlicht\CImageLoaderJPG.cpp|139|warning: variable 'rowPtr' might be clobbered by `longjmp' or `vfork'|
C:\consoledev\irrlicht-svn\source\Irrlicht\CImageLoaderPNG.cpp||In member function `virtual irr::video::IImage* irr::video::CImageLoaderPng::loadImage(irr::io::IReadFile*) const':|
C:\consoledev\irrlicht-svn\source\Irrlicht\CImageLoaderPNG.cpp|93|warning: variable 'image' might be clobbered by `longjmp' or `vfork'|
C:\consoledev\irrlicht-svn\source\Irrlicht\CImageLoaderPNG.cpp|95|warning: variable 'RowPointers' might be clobbered by `longjmp' or `vfork'|
C:\consoledev\irrlicht-svn\source\Irrlicht\COpenGLDriver.cpp||In member function `bool irr::video::COpenGLDriver::initDriver(irr::SIrrlichtCreationParameters)':|
C:\consoledev\irrlicht-svn\source\Irrlicht\COpenGLDriver.cpp|72|warning: 'PixelFormat' might be used uninitialized in this function|
C:\consoledev\irrlicht-svn\source\Irrlicht\Irrlicht.cpp|44|error: external linkage required for symbol 'irr::core::IdentityMatrix' because of 'dllexport' attribute.|
||=== Build finished: 1 errors, 4 warnings ===|

[Eigen]

I get the same error with DevCpp. Although the "'image' might be clobbered" warning has always been present.

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C:\irrlicht-1.5.beta\source\Irrlicht\COpenGLDriver.cpp In member function `bool irr::video::COpenGLDriver::initDriver(irr::SIrrlichtCreationParameters)': 
72 C:\irrlicht-1.5.beta\source\Irrlicht\COpenGLDriver.cpp [Warning] 'PixelFormat' might be used uninitialized in this function
 C:\irrlicht-1.5.beta\source\Irrlicht\CImageLoaderPNG.cpp In member function `virtual irr::video::IImage* irr::video::CImageLoaderPng::loadImage(irr::io::IReadFile*) const': 
93 C:\irrlicht-1.5.beta\source\Irrlicht\CImageLoaderPNG.cpp [Warning] variable 'image' might be clobbered by `longjmp' or `vfork' 
44 C:\irrlicht-1.5.beta\source\Irrlicht\Irrlicht.cpp external linkage required for symbol 'irr::core::IdentityMatrix' because of 'dllexport' attribute.

[rogerborg]

OK, sorry about this, and thanks for your continued patience. Since I can't test this, I've just removed the cause; it was one of those spur of the moment changes that we never really tested.

SVN 1905 should remove the issue completely. If not, then God help us. God help us all.

[zeroZshadow]

then i hope god is still on hold on your phone.

it didn't work.
wierd thing is, when i updated to rev 1905, no files where changed at all here
or do i have to recheckout ?

[Eigen]

The SVN didn't work for me either. But changing

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namespace core
{
	IRRLICHT_API const matrix4 IdentityMatrix(matrix4::EM4CONST_IDENTITY);
}

to

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namespace core
{
	IRRLICHT_API extern const matrix4 IdentityMatrix(matrix4::EM4CONST_IDENTITY);
}

allowed me to compile the engine. It seems to work fine. I don't know if it's a correct solution or anything ..

[zeroZshadow]

compiles here too with some errors

but suddenly my game is broken, so i'm reverting

stuff that breaks:

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WideString msg;
msg = nodeTarget->isVisible();
//widestring is just a stringw

the error on compiling is:

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no match for 'operator=' in 'msg = (*(((irr::scene::ISceneNode*)nodeTarget)->irr::scene::ISceneNode::_vptr$IAttributeExchangingObject + 56u))(((irr::scene::ISceneNode*)nodeTarget))' 

candidates are: irr::core::string<T, irr::core::irrAllocator<T> >& irr::core::string<T, TAlloc>::operator=(const irr::core::string<T, irr::core::irrAllocator<T> >&) [with T = wchar_t, TAlloc = irr::core::irrAllocator<wchar_t>] 

damn, and i was so hoping to use the new version =.=

[hybrid]

integers require an explicit constructor call as of 1.5, so just add core::stringw(nodeTarget->isVisible())

[rogerborg]

Oh splurge. I'm sorry, I'm talking about SVN 1905 on the 1.5 branch, not the trunk. All of our fixes are going on the 1.5 branch first.

On the 1.5 branch, I've removed that IRRLICHT_API completely now.

I should really just get myself a Win32 gcc, shouldn't I?

[MasterM]

I should really just get myself a Win32 gcc, shouldn't I?

It was a shock to hear that you did not have the most awesome compiler