[Bug 1834143] Re: 1.4.7-3 defines (header) but doesn't export some functions

[Christian Ehrhardt ]

Well other than expected this even came after 1.5 so let me file a
Debian bug as well.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to device-tree-compiler in Ubuntu.
https://bugs.launchpad.net/bugs/1834143

Title:
  1.4.7-3 defines (header) but doesn't export some functions

Status in device-tree-compiler package in Ubuntu:
  In Progress
Status in device-tree-compiler source package in Cosmic:
  Won't Fix
Status in device-tree-compiler source package in Disco:
  Won't Fix

Bug description:
  libfdt 1.4.7-3 as currently in C/D/E defines some functions that it then fails to export.
  Due to that programs build against its headers might fail later on.

  For example qemu:
  cc -pthread -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -std=gnu99 -g -O2 -fdebug-prefix-map=/<<BUILDDIR>>/qemu-4.0+dfsg=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -fstack-protector-strong -I/usr/include/p11-kit-1 -I/usr/include/libpng16 -o config-temp/qemu-conf.exe config-temp/qemu-conf.c -Wl,-z,relro -Wl,-z,now -pie -m64 -g -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed -lfdt
  /usr/bin/ld: /tmp/cck74tTE.o: in function `main':
  ./b/qemu/config-temp/qemu-conf.c:3: undefined reference to `fdt_check_full'

  A fix to that is already upstream [1] and should be an easy backport
  that also "only" adds symbols - so it should be rather SRU safe.

  We haven't seen this in the wild because almost no project has yet picked up to use the new function.
  Hence I'm not sure we really need SRUs, but for Eoan and forward we will need that as e.g. qemu did so in [2] and therfore is FTBFS without the fix. Over the time more projects might be like that so lets fix it in Eoan (and not the others) for now.

  [1]: https://github.com/dgibson/dtc/commit/eac2ad495b29f15d78daa2a7226653f36515cd7a
  [2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fea35ca4b8e68b4fae5df7a13d8f300d9abfb40a

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/device-tree-compiler/+bug/1834143/+subscriptions