我试图在Ubuntu 16.04上构建RedHawkSdr CF.看起来这应该是一个相对简单的操作，但我不知道从哪里开始看这个问题。我相信我遵循了所有针对依赖项和环境变量的Ubuntu特定指令。
我收到此错误：
make[2]: Entering directory '/home/brasssm1/workspace/draco/redhawk-src-2.0.3/redhawk/src/control/parser'
xsdcxx cxx-parser --root-element deviceconfiguration --type-map internal/dcd.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/dcd.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:dcd"/ns.empty()/g' internal/dcd-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:dcd"/""/g' internal/dcd-pskel.cpp
xsdcxx cxx-parser --root-element domainmanagerconfiguration --type-map internal/dmd.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/dmd.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:dmd"/ns.empty()/g' internal/dmd-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:dmd"/""/g' internal/dmd-pskel.cpp
xsdcxx cxx-parser --root-element devicepkg --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/dpd.xsd
xsdcxx cxx-parser --root-element properties --type-map internal/prf.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/prf.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:prf"/ns.empty()/g' internal/prf-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:prf"/""/g' internal/prf-pskel.cpp
xsdcxx cxx-parser --root-element profile --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/profile.xsd
xsdcxx cxx-parser --root-element softwareassembly --type-map internal/sad.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/sad.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:sad"/ns.empty()/g' internal/sad-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:sad"/""/g' internal/sad-pskel.cpp
xsdcxx cxx-parser --root-element softwarecomponent --type-map internal/scd.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/scd.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:scd"/ns.empty()/g' internal/scd-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:scd"/""/g' internal/scd-pskel.cpp
xsdcxx cxx-parser --root-element softpkg --type-map internal/spd.map --hxx-suffix .h --cxx-suffix .cpp --xml-parser expat --output-dir internal --generate-validation ../../xml/xsd/spd.xsd; sed -i 's/ns == "urn:mil:jpeojtrs:sca:spd"/ns.empty()/g' internal/spd-pskel.cpp; sed -i 's/"urn:mil:jpeojtrs:sca:spd"/""/g' internal/spd-pskel.cpp
make all-am
make[3]: Entering directory '/home/brasssm1/workspace/draco/redhawk-src-2.0.3/redhawk/src/control/parser'
CXX libossieparser_la-Properties.lo
CXX libossieparser_la-debug.lo
CXX libossieparser_la-SoftPkg.lo
CXX libossieparser_la-DomainManagerConfiguration.lo
CXX libossieparser_la-ComponentDescriptor.lo
CXX libossieparser_la-SoftwareAssembly.lo
CXX libossieparser_la-componentProfile.lo
CXX libossieparser_la-DeviceManagerConfiguration.lo
CXX internal/libossieparser_la-prf-pskel.lo
In file included from /usr/include/xsd/cxx/parser/expat/elements.hxx:362:0,
from internal/sad-pskel.h:114,
from internal/sad-pimpl.h:30,
from internal/sad-parser.h:27,
from SoftwareAssembly.cpp:22:
/usr/include/xsd/cxx/parser/expat/elements.txx: In member function ‘bool xsd::cxx::parser::expat::document<C>::parse(std::istream&, const std::__cxx11::basic_string<_CharT>*, const std::__cxx11::basic_string<_CharT>*, xsd::cxx::xml::error_handler<C>&)’:
/usr/include/xsd/cxx/parser/expat/elements.txx:282:22: error: no match for ‘operator==’ (operand types are ‘xsd::cxx::parser::expat::parser_auto_ptr’ and ‘int’)
if (parser == 0)
^
In file included from /usr/include/xsd/cxx/parser/xml-schema.hxx:569:0,
from internal/sad-pskel.h:109,
from internal/sad-pimpl.h:30,
from internal/sad-parser.h:27,
from SoftwareAssembly.cpp:22:
/usr/include/xsd/cxx/parser/xml-schema.txx:15:7: note: candidate: template<class C> bool xsd::cxx::parser::operator==(const xsd::cxx::parser::string_sequence<C>&, const xsd::cxx::parser::string_sequence<C>&)
operator== (const string_sequence<C>& a, const string_sequence<C>& b)
^
/usr/include/xsd/cxx/parser/xml-schema.txx:15:7: note: template argument deduction/substitution failed:
In file included from /usr/include/xsd/cxx/parser/expat/elements.hxx:362:0,
from internal/sad-pskel.h:114,
from internal/sad-pimpl.h:30,
from internal/sad-parser.h:27,
from SoftwareAssembly.cpp:22:
/usr/include/xsd/cxx/parser/expat/elements.txx:282:25: note: ‘xsd::cxx::parser::expat::parser_auto_ptr’ is not derived from ‘const xsd::cxx::parser::string_sequence<C>’
if (parser == 0)
我按照说明下载了依赖项，但是在更新repos时发现了一个错误：
E：无法获取 http://ppa.launchpad.net/redhawksdr/redhawk/ubuntu/dists/xenial/main/binary-amd64/Packages 找不到404
E：某些索引文件无法下载。他们被忽视或者老了 而是使用的。
我不确定这是否会导致任何问题。