* Jacob Kroon: > I suppose gnu ld doesn't try to optimize for usage of substrings in > RUNPATH, thus making if fairly easy to change it post linking. I think it does, it's just that RUNPATH with an overlapping tail is just rare in practice because of its contents. Try this: $ gcc -nostartfiles -shared -Wl,-rpath,one-long-string,-soname,one-long-string $ readelf -dW a.out Dynamic section at offset 0x1f20 contains 9 entries: Tag Type Name/Value 0x0000000000000001 (NEEDED) Shared library: [libc.so.6] 0x000000000000000e (SONAME) Library soname: [one-long-string] 0x000000000000001d (RUNPATH) Library runpath: [one-long-string] 0x000000006ffffef5 (GNU_HASH) 0x180 0x0000000000000005 (STRTAB) 0x1b8 0x0000000000000006 (SYMTAB) 0x1a0 0x000000000000000a (STRSZ) 27 (bytes) 0x000000000000000b (SYMENT) 24 (bytes) 0x0000000000000000 (NULL) 0x0 But if you look at the file with a hex editor, you'll notice that the string is only there once: 000001b0: 0000 0000 0000 0000 006c 6962 632e 736f .........libc.so 000001c0: 2e36 006f 6e65 2d6c 6f6e 672d 7374 7269 .6.one-long-stri 000001d0: 6e67 0000 0000 0000 0000 0000 0000 0000 ng.............. > But can I then specify during link time that RUNTIME should go in a > "reserved" area, whose size I can also control ? I hope I understood you > correctly. I think GNU ld doesn't have this feature today. Thanks, Florian
