While building with gcc on Irix one is confronted by the message:

---------------------------->8----------------------------------------------
g++ -DHAVE_CONFIG_H -I. -I../../../blender/intern/bsp -I../.. -I../../../blender/intern/container -I../../../blender/intern/moto/include -I../../../blender/intern/memutil -I/usr/freeware/include -g -funsigned-char -c ../../../blender/intern/bsp/intern/BSP_CSGMesh.cpp -MT BSP_CSGMesh.lo -MD -MP -MF .deps/BSP_CSGMesh.TPlo  -DPIC -o .libs/BSP_CSGMesh.lo
/usr/freeware/lib/gcc-lib/mips-sgi-irix6.5/3.0.4/include/g++/bits/stl_iterator.h: In
   constructor `std::__normal_iterator<_Iterator,
   _Container>::__normal_iterator(const std::__normal_iterator<_Iter,
   _Container>&) [with _Iter = const BSP_MFace*, _Iterator = BSP_MFace*,
   _Container = std::vector<BSP_MFace, std::allocator<BSP_MFace> >]':
../../../blender/intern/bsp/intern/BSP_CSGMesh.cpp:270:   instantiated from here
/usr/freeware/lib/gcc-lib/mips-sgi-irix6.5/3.0.4/include/g++/bits/stl_iterator.h:474: cannot
   convert `const BSP_MFace* const' to `BSP_MFace*' in initialization
*** Error code 1 (bu21)
*** Error code 1 (bu21)
*** Error code 1 (bu21)
*** Error code 1 (bu21)
---------------------------->8----------------------------------------------

The line in question that causes the error is the middle one in this group:

	vector<BSP_MFace>::const_iterator f_it_end = FaceSet().end();
	vector<BSP_MFace>::const_iterator f_it_begin = FaceSet().begin();
	vector<BSP_MFace>::iterator f_it = FaceSet().begin();

Dropping the 'const_' from that middle line enables gcc to compile the
file correctly (this is also consistent with what is going on with other
parts of the file, i.e., stuff that is returned from a begin() method is
declared as vector<BSP_MFace>::iterator instead of
vector<BSP_MFace>::const_iterator.

But I'll be honest: I have no idea what this code does, so if somebody with
better C++ skills wants to check it, then please do.

This change was also tested to compile and run on debian linux/x86
(well, booleans are broken right now, so I wasn't able to do too much
testing).

Chris

intern/bsp/intern/BSP_CSGMesh.cpp

@@ -251,7 +251,7 @@ BuildEdges(
 	//edges
 	
 	vector<BSP_MFace>::const_iterator f_it_end = FaceSet().end();
-	vector<BSP_MFace>::const_iterator f_it_begin = FaceSet().begin();
+	vector<BSP_MFace>::iterator f_it_begin = FaceSet().begin();
 	vector<BSP_MFace>::iterator f_it = FaceSet().begin();
 
 	vector<BSP_MVertex> & vertex_set = VertexSet();