xvariant.cpp.o -c /builddir/build/BUILD/xtl-0.4.14/test/test_xvariant.cpp
make[2]: Leaving directory '/builddir/build/BUILD/xtl-0.4.14'
make[2]: Entering directory '/builddir/build/BUILD/xtl-0.4.14'
[ 75%] Building CXX object test/CMakeFiles/test_xtl.dir/test_xoptional.cpp.o
cd /builddir/build/BUILD/xtl-0.4.14/test && /usr/bin/c++   -I/builddir/build/BUILD/xtl-0.4.14/include  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -fasynchronous-unwind-tables -fstack-clash-protection -Wunused-parameter -Wextra -Wreorder -Wconversion -Wsign-conversion -std=c++14 -DNDEBUG   -o CMakeFiles/test_xtl.dir/test_xoptional.cpp.o -c /builddir/build/BUILD/xtl-0.4.14/test/test_xoptional.cpp
make[2]: Leaving directory '/builddir/build/BUILD/xtl-0.4.14'
BUILDSTDERR: /builddir/build/BUILD/xtl-0.4.14/test/test_xoptional.cpp: In member function 'virtual void xtl::xoptional_xoptional_proxy_Test::TestBody()':
BUILDSTDERR: /builddir/build/BUILD/xtl-0.4.14/test/test_xoptional.cpp:214:50: warning: typedef 'using optional_int = class xtl::xoptional<int, bool>' locally defined but not used [-Wunused-local-typedefs]
BUILDSTDERR:          using optional_int = xoptional<int, bool>;
BUILDSTDERR:                                                   ^
make[2]: Entering directory '/builddir/build/BUILD/xtl-0.4.14'
[100%] Linking CXX executable test_xtl
cd /builddir/build/BUILD/xtl-0.4.14/test && /usr/bin/cmake -E cmake_link_script CMakeFiles/test_xtl.dir/link.txt --verbose=1
/usr/bin/c++  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -fasynchronous-unwind-tables -fstack-clash-protection -Wunused-parameter -Wextra -Wreorder -Wconversion -Wsign-conversion -std=c++14 -DNDEBUG  -Wl,-z,relro   -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -rdynamic CMakeFiles/test_xtl.dir/main.cpp.o CMakeFiles/test_xtl.dir/test_xbase64.cpp.o CMakeFiles/test_xtl.dir/test_xbasic_fixed_string.cpp.o CMakeFiles/test_xtl.dir/test_xcomplex.cpp.o CMakeFiles/test_xtl.dir/test_xcomplex_sequence.cpp.o CMakeFiles/test_xtl.dir/test_xclosure.cpp.o CMakeFiles/test_xtl.dir/test_xdynamic_bitset.cpp.o CMakeFiles/test_xtl.dir/test_xhash.cpp.o CMakeFiles/test_xtl.dir/test_xhierarchy_generator.cpp.o CMakeFiles/test_xtl.dir/test_xiterator_base.cpp.o CMakeFiles/test_xtl.dir/test_xmeta_utils.cpp.o CMakeFiles/test_xtl.dir/test_xoptional.cpp.o CMakeFiles/test_xtl.dir/test_xtype_traits.cpp.o CMakeFiles/test_xtl.dir/test_xproxy_wrapper.cpp.o CMakeFiles/test_xtl.dir/test_xvariant.cpp.o  -o test_xtl -lnlohmann_json -lgtest -lgtest_main -lpthread 
make[2]: Leaving directory '/builddir/build/BUILD/xtl-0.4.14'
BUILDSTDERR: /usr/bin/ld: cannot find -lnlohmann_json
BUILDSTDERR: collect2: error: ld returned 1 exit status
BUILDSTDERR: make[2]: *** [test/CMakeFiles/test_xtl.dir/build.make:299: test/test_xtl] Error 1
BUILDSTDERR: make[1]: *** [CMakeFiles/Makefile2:127: test/CMakeFiles/test_xtl.dir/all] Error 2
RPM build errors:
BUILDSTDERR: make: *** [Makefile:133: all] Error 2
BUILDSTDERR: error: Bad exit status from /var/tmp/rpm-tmp.IsiXJM (%build)
BUILDSTDERR:     Bad exit status from /var/tmp/rpm-tmp.IsiXJM (%build)
Child return code was: 1
EXCEPTION: [Error()]
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py", line 96, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.6/site-packages/mockbuild/util.py", line 626, in do
    raise exception.Error("Command failed: \n # %s\n%s" % (command, output), child.returncode)
mockbuild.exception.Error: Command failed: 
 # bash --login -c /usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/xtl.spec