Re: Where did res_querydomain go in f24??
On 09/02/2016 01:00 AM, Steve Dickson wrote:
Hello,
This is regard to bz1372136... as the bz says
From Koji logs :
- x86_64 and armv7hl have an issue in configure : checking for res_querydomain in
-lresolv... no
- i686 works : checking for res_querydomain in -lresolv... yes
This is strange, since the symbol in present in /lib/libresolv-2.23.so.
Here was has res_querydomain or even res_nquerydomain moved to to??
Why can't I find it with a AC_CHECK_FUNC() or a AC_CHECK_LIB() macros?
The function symbol has always been __res_querydomain. The autoconf
test is invalid. You need to include the <resolv.h> header first and
then use the function in some way that makes it into the binary (you
cannot declare your own prototype, like many autoconf tests do).
This, in turn, causes libresolv to be dropped from the static link, and
the resulting DSO is invalid, for two reasons: There is no DT_NEEDED
entry for libresolv.so.2 (leading to undefined symbols), and the symbol
references are unversioned (which means the dynamic linker will
potentially bind them to a compatibility symbol).
Florian