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1 ABI compatibility checker for shared libraries with symbol versioning.
2
3 shlib-compat uses dwarf debugging symbols to recreate definitions of
4 exported symbols, including function arguments and structural types.
5
6 The shlib-compat.py script requires devel/dwarfdump port to be
7 installed.
8
9
10 Syscalls in libc are implemented as assembly stubs and thus have no
11 debugging symbols attached. To enable sysfake stubs rebuild libc
12 adding the following to /etc/make.conf:
13
14 .if ${.CURDIR:M/usr/src/lib/libc}
15 .include "../../tools/tools/shlib-compat/Makefile.sysfake"
16 .endif
17
18 To compare libc.so versions compiled with sysfake stubs:
19 ./shlib-compat.py -v --alias-prefix __sysfake_ \
20         --alias-prefix __sysfake_freebsd8_ \
21         --exclude-ver FBSDprivate \
22         --out-orig out-orig.c --out-new out-new.c libc.so.7.orig libc.so.7.new