Mike Reed <gnu@xxxxxxxxxxx> writes: > $ g++ -c -o Viewer.o Viewer.cpp > In file included from Viewer.cpp:1: > Viewer.h:4:23: error: gtkmm/box.h: No such file or directory > > I can see from the source that the #include occurs on line 4 of Viewer.h > but what is the 23? I only seem to get this second number on "No such > file or directory" messages. In the GCC documentation it only mentions > filename and line number being given, no mention of a possible second > number or what it is. 23 is the column number (which is fairly useless for a #include directive). In current releases gcc displays the column number for preprocessor errors and warnings. The future gcc 4.5.0 will (by default) display a column number for all messages, not just preprocessor ones. Ian
