Hi, I'm currently working on reproducibility for Fedora packages and I'm hitting an issue with lto/annobin. Filenames generated with https://github.com/gcc-mirror/gcc/blob/master/gcc/lto-wrapper.c#L1769 makes annobin gcc plugin injecting in the default case random pattern into elf (https://sourceware.org/git/?p=annobin.git;a=blob;f=gcc-plugin/annobin.cc;h=613379bb8d351596d7c73c723963b51df42f4971;hb=HEAD#l198).
For example, a readelf symbolds of a built Fedora packages could have:
35: 0000000000002af0 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o
36: 00000000000047a1 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o_end
37: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o.hot
38: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o_end.hot
39: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o.unlikely
40: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o_end.unlikely
41: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o.startup
42: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o_end.startup
43: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o.exit
44: 0000000000002a30 0 NOTYPE LOCAL HIDDEN 13
.annobin_dummyqbs_drv.so.MDkv6z.ltrans0.o_end.exit
I've succeeded to brutally replace the input filenames by a constant pattern to
make the build reproducible.
Do you have any idea what would be the best strategy to fix that? lto-wrapper
or in the annobin plugin?
Best regards,
Frédéric
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