firefox compilation problem

[S.N.Grigoriev]

Hi list,

I've got the following problem: the firefox building from ports ends with errors:

------
x86_64-unknown-freebsd/release/libgkrust.a: could not read symbols: File format not recognized
c++: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[7]: *** [/usr/ports/www/firefox/work/firefox-56.0/config/rules.mk:719: libxul.so] Error 1
gmake[7]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0/obj-x86_64-unknown-freebsd11.1/toolkit/library'
gmake[6]: *** [/usr/ports/www/firefox/work/firefox-56.0/config/recurse.mk:73: toolkit/library/target] Error 2
gmake[6]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0/obj-x86_64-unknown-freebsd11.1'
gmake[5]: *** [/usr/ports/www/firefox/work/firefox-56.0/config/recurse.mk:33: compile] Error 2
gmake[5]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0/obj-x86_64-unknown-freebsd11.1'
gmake[4]: *** [/usr/ports/www/firefox/work/firefox-56.0/config/rules.mk:453: default] Error 2
gmake[4]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0/obj-x86_64-unknown-freebsd11.1'
gmake[3]: *** [/usr/ports/www/firefox/work/firefox-56.0/client.mk:419: realbuild] Error 2
gmake[3]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0'
gmake[2]: *** [/usr/ports/www/firefox/work/firefox-56.0/client.mk:170: build] Error 2
gmake[2]: Leaving directory '/usr/ports/www/firefox/work/firefox-56.0'
*** Error code 1
------

My system is:

FreeBSD 11.1-STABLE #0 r324239: Tue Oct  3 18:10:29 MSK 2017 root at am:/usr/obj/usr/src/sys/VNET11 amd64

Any tips are appreciated.

-- 
Regards,
S.Grigoriev.