On Fri, Dec 12, 2014 at 12:24 AM, Lennart Poettering <lenn...@poettering.net> wrote: > On Thu, 11.12.14 23:01, Umut Tezduyar Lindskog (u...@tezduyar.com) wrote: > >> Trying to build 218 but I am getting undefined reference error. The >> source code of bus-error.c mentions that gcc magically maps these >> variables but not for me. >> >> What is doing the mapping? __attribute__ ((__section__("BUS_ERROR_MAP"))) ? >> >> Could it be that mentioned "gcc magic" is not supported on cross compiling? >> >> Also, why do we need to use elf section instead of iterating over >> bus_standard_errors[]? > > The idea is that any .c file linked into a binary can define > additional maps, and we collect them all simply by iterating through > __start_BUS_ERROR_MAP to __stop_BUS_ERROR_MAP. > > The __start_XYZ/__stop_XYZ magic is pretty old ld/gold stuff, support > since a long time. > > Is there something fishy with your toolchain? Any particular build > time options you turned on or off? Some really old ld > versions would end up dropping these sections a bit too eagerly:
Maybe. I will ask this internally too. > > https://sourceware.org/bugzilla/show_bug.cgi?id=11133 > > But that's 4y old... Or is your toolchain that old? Shouldn't be: mipsisa32r2el-axis-linux-gnu-gcc --version mipsisa32r2el-axis-linux-gnu-gcc (GCC 4.7.2 Axis release R24/1.24) 4.7.2 20120820 (prerelease) [gcc-4_7-branch revision 190527] > >> CCLD libnss_resolve.la >> libsystemd_shared_la-hashmap.o (symbol from plugin): warning: memset >> used with constant zero length parameter; this could be due to >> transposed parameters >> /tmp/ccHr0vVt.ltrans13.ltrans.o: In function `bus_error_name_to_errno.14134': >> ccHr0vVt.ltrans13.o:(.text+0x7b0): undefined reference to >> `__start_BUS_ERROR_MAP' >> ccHr0vVt.ltrans13.o:(.text+0x7b4): undefined reference to >> `__stop_BUS_ERROR_MAP' >> collect2: error: ld returned 1 exit status >> >> Umut >> _______________________________________________ >> systemd-devel mailing list >> systemd-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/systemd-devel > > > Lennart > > -- > Lennart Poettering, Red Hat _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel