#10779: .so files in 64-bit Debian builds are 4% larger than they have to be -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Build System | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by thomie): Below, filepath-ubuntu.so is from hvr's ppa build of ghc-7.10.2 (exact file mentioned above), filepath-debian.so is from the Debian download. {{{ $ size -A filepath-ubuntu.so filepath-debian.so filepath-ubuntu.so : section size addr .note.gnu.build-id 36 400 .gnu.hash 2564 440 .dynsym 8976 3008 .dynstr 26101 11984 .gnu.version 748 38086 .gnu.version_r 32 38840 .rela.dyn 12816 38872 .rela.plt 96 51688 .init 26 51784 .plt 80 51824 .text 60569 51904 .fini 9 112476 .rodata 278 112488 .eh_frame 4 112768 .init_array 8 2210792 .fini_array 8 2210800 .jcr 8 2210808 .dynamic 624 2210816 .got 400 2211440 .got.plt 56 2211840 .data 6624 2211896 .bss 8 2218520 Total 120071 filepath-debian.so : section size addr .note.gnu.build-id 36 400 .hash 2556 440 .gnu.hash 2564 3000 .dynsym 8976 5568 .dynstr 26101 14544 .gnu.version 748 40646 .gnu.version_r 32 41400 .rela.dyn 12816 41432 .rela.plt 72 54248 .init 14 54320 .plt 64 54336 .text 60596 54400 .fini 9 114996 .rodata 278 115008 .eh_frame_hdr 20 115288 .eh_frame 68 115312 .init_array 8 2215936 .fini_array 8 2215944 .jcr 8 2215952 .dynamic 640 2215960 .got 400 2216600 .got.plt 48 2217000 .data 6624 2217048 .bss 8 2223672 .comment 39 0 Total 122733 }}} filepath-debian.so contains additional `.hash`, `.eh_frame_hdr` and `.comment` sections. After removing those, the `size` utility reports a similar file size as it does for filepath-ubuntu.so: {{{ $ strip -R .hash -R .eh_frame_hdr -R .comment filepath-debian.so $ size filepath-debian.so text data bss dec hex filename 112394 7736 8 120138 1d54a filepath-debian.so }}} But the file did not get much smaller. I don't understand why not. {{{ $ wc -c filepath-debian.so 128456 filepath-debian.so }}} My system: {{{ $ ld --version # Binutils also provides `size` and `strip`. GNU ld (GNU Binutils for Ubuntu) 2.24 $ gcc --version gcc (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10779#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler