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Hi Holger, > Note that I did specify "-g", but not any "-Ox" switches. That > made the size of all *.o files together being 143 MB. LLVM represents debug info as explicit calls to intrinsics. This approach has many advantages, but a possible disadvantage is that it can significantly increase the size of the bitcode. I don't know if that explains your observations.

...2**2 ALLOC 3 .rodata.str1.1 00000157 00000000 00000000 000008a8 2**0 CONTENTS, ALLOC, LOAD, READONLY, DATA 4 .comment 0000003a 00000000 00000000 000009ff 2**0 CONTENTS, READONLY 5 .note.GNU-stack 00000000 00000000 00000000 00000a39 2**0 CONTENTS, READONLY There are various formats available, e.g. Dwarf and others. I think this is all handled via libbfd, or you can get more info by staring at the gdb source.

I want to share a little LLVM experiment. I tried LLVM on one of my bigger Qt 3.x based projects. I used llvm from SVN trunk (r39999) and SVN llvm-gcc-4.01 (r370) and did compile every file with /usr/src/llvm/dist/bin/g++ -c -pipe -g \ -Wall -Wextra -Wno-sign-compare \ ... lots of -Dxxxx ... \ --emit-llvm -I/usr/share/qt3/mkspecs/default \ -I. -I.. -I../../../include/qt3 -I.obj/ \