gcc-gcj packer-error

Error installing gcc-gcj from AUR with packer:



In file included from ../../../libgomp/env.c:30:0:
./libgomp_f.h:44:7: error: operator '==' has no left operand
 #if ( == ) \
       ^
./libgomp_f.h: In function ‘omp_check_defines’:
./libgomp_f.h:79:11: error: expected expression before ‘!=’ token
       ||  != sizeof (omp_nest_lock_t)
           ^
./libgomp_f.h:77:8: error: unused variable ‘test’ [-Werror=unused-variable]
   char test[(4 != sizeof (omp_lock_t)
        ^
cc1: all warnings being treated as errors
Makefile:613: recipe for target 'env.lo' failed
make[5]: *** [env.lo] Error 1
make[5]: Leaving directory '/home/myhomedir/.cache/pacaur/gcc-gcj/src/gcc-5.3.0/build/x86_64-unknown-linux-gnu/libgomp'
Makefile:857: recipe for target 'all-recursive' failed
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory '/home/myhomedir/.cache/pacaur/gcc-gcj/src/gcc-5.3.0/build/x86_64-unknown-linux-gnu/libgomp'
Makefile:451: recipe for target 'all' failed
make[3]: *** [all] Error 2
make[3]: Leaving directory '/home/myhomedir/.cache/pacaur/gcc-gcj/src/gcc-5.3.0/build/x86_64-unknown-linux-gnu/libgomp'
Makefile:20180: recipe for target 'all-stage2-target-libgomp' failed
make[2]: *** [all-stage2-target-libgomp] Error 2
make[2]: Leaving directory '/home/myhomedir/.cache/pacaur/gcc-gcj/src/gcc-5.3.0/build'
Makefile:21904: recipe for target 'stage2-bubble' failed
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory '/home/myhomedir/.cache/pacaur/gcc-gcj/src/gcc-5.3.0/build'
Makefile:904: recipe for target 'all' failed
make: *** [all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
:: failed to build gcc-gcj package(s)