[committed] Ignore references with relocs to discard sections from .data.rel.ro.local on hppa-linux

[John David Anglin <dave dot anglin at bell dot net>]

The attached change is a bandaid to fix GCC PR67834:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67834

When building uhd and some other c++ packages we encounter the following error:
/usr/bin/c++  -fPIC -g -O2 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2  -fvisibility=hidden -fvisibility-inlines-hidden  -shared -Wl,-soname,libuhd.so.003 -o libuhd.so.003.009 CMakeFiles/uhd.dir/types/device_addr.cpp.o CMakeFiles/uhd.dir/types/mac_addr.cpp.o CMakeFiles/uhd.dir/types/metadata.cpp.o CMakeFiles/uhd.dir/types/ranges.cpp.o CMakeFiles/uhd.dir/types/sensors.cpp.o CMakeFiles/uhd.dir/types/serial.cpp.o CMakeFiles/uhd.dir/types/sid.cpp.o CMakeFiles/uhd.dir/types/time_spec.cpp.o CMakeFiles/uhd.dir/types/tune.cpp.o CMakeFiles/uhd.dir/types/types.cpp.o CMakeFiles/uhd.dir/types/wb_iface.cpp.o CMakeFiles/uhd.dir/types/filters.cpp.o CMakeFiles/uhd.dir/types/byte_vector.cpp.o CMakeFiles/uhd.dir/types/metadata_c.cpp.o CMakeFiles/uhd.dir/types/ranges_c.cpp.o CMakeFiles/uhd.dir/types/sensors_c.cpp.o CMakeFiles/uhd.dir/types/string_vector_c.cpp.o CMakeFiles/uhd.dir/types/tune_c.cpp.o CMakeFiles/uhd.dir/types/usrp_info_c.cpp.o CMakeFiles/uhd.dir/convert/convert_general.cpp.o 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CMakeFiles/uhd.dir/transport/nirio/nirio_driver_iface_linux.cpp.o CMakeFiles/uhd.dir/transport/libusb1_control.cpp.o CMakeFiles/uhd.dir/transport/libusb1_zero_copy.cpp.o CMakeFiles/uhd.dir/transport/libusb1_base.cpp.o CMakeFiles/uhd.dir/transport/udp_zero_copy.cpp.o CMakeFiles/uhd.dir/transport/vrt_if_packet.cpp.o CMakeFiles/uhd.dir/transport/tcp_zero_copy.cpp.o CMakeFiles/uhd.dir/transport/buffer_pool.cpp.o CMakeFiles/uhd.dir/transport/if_addrs.cpp.o CMakeFiles/uhd.dir/transport/udp_simple.cpp.o CMakeFiles/uhd.dir/transport/nirio_zero_copy.cpp.o CMakeFiles/uhd.dir/transport/chdr.cpp.o CMakeFiles/uhd.dir/usrp/dboard_base.cpp.o CMakeFiles/uhd.dir/usrp/dboard_eeprom.cpp.o CMakeFiles/uhd.dir/usrp/dboard_id.cpp.o CMakeFiles/uhd.dir/usrp/dboard_iface.cpp.o CMakeFiles/uhd.dir/usrp/dboard_manager.cpp.o CMakeFiles/uhd.dir/usrp/gps_ctrl.cpp.o CMakeFiles/uhd.dir/usrp/mboard_eeprom.cpp.o CMakeFiles/uhd.dir/usrp/multi_usrp.cpp.o CMakeFiles/uhd.dir/usrp/subdev_spec.cpp.o CMakeFiles/uhd.dir/usrp/dboard_eeprom_c.cpp.o CMakeFiles/uhd.dir/usrp/mboard_eeprom_c.cpp.o CMakeFiles/uhd.dir/usrp/subdev_spec_c.cpp.o CMakeFiles/uhd.dir/usrp/usrp_c.cpp.o CMakeFiles/uhd.dir/usrp/gpsd_iface.cpp.o CMakeFiles/uhd.dir/usrp/cores/gpio_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/i2c_core_100.cpp.o CMakeFiles/uhd.dir/usrp/cores/i2c_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/spi_core_100.cpp.o CMakeFiles/uhd.dir/usrp/cores/time64_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/rx_dsp_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/tx_dsp_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/rx_frontend_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/tx_frontend_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/user_settings_core_200.cpp.o CMakeFiles/uhd.dir/usrp/cores/rx_vita_core_3000.cpp.o CMakeFiles/uhd.dir/usrp/cores/tx_vita_core_3000.cpp.o CMakeFiles/uhd.dir/usrp/cores/time_core_3000.cpp.o CMakeFiles/uhd.dir/usrp/cores/spi_core_3000.cpp.o 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CMakeFiles/uhd.dir/utils/csv.cpp.o CMakeFiles/uhd.dir/utils/gain_group.cpp.o CMakeFiles/uhd.dir/utils/load_modules.cpp.o CMakeFiles/uhd.dir/utils/log.cpp.o CMakeFiles/uhd.dir/utils/msg.cpp.o CMakeFiles/uhd.dir/utils/paths.cpp.o CMakeFiles/uhd.dir/utils/platform.cpp.o CMakeFiles/uhd.dir/utils/static.cpp.o CMakeFiles/uhd.dir/utils/tasks.cpp.o CMakeFiles/uhd.dir/utils/thread_priority.cpp.o CMakeFiles/uhd.dir/utils/thread_priority_c.cpp.o CMakeFiles/uhd.dir/deprecated.cpp.o CMakeFiles/uhd.dir/device.cpp.o CMakeFiles/uhd.dir/image_loader.cpp.o CMakeFiles/uhd.dir/stream.cpp.o CMakeFiles/uhd.dir/exception.cpp.o CMakeFiles/uhd.dir/property_tree.cpp.o CMakeFiles/uhd.dir/version.cpp.o CMakeFiles/uhd.dir/error_c.cpp.o -lboost_date_time -lboost_filesystem -lboost_program_options -lboost_regex -lboost_system -lboost_thread -lboost_unit_test_framework -lboost_serialization -lpthread -lrt -lusb-1.0 -lgps -lpthread -ldl 
`_ZN3uhd9transport3sphL19handle_overflow_nopEv' referenced in section `.data.rel.ro.local' of CMakeFiles/uhd.dir/usrp/usrp2/io_impl.cpp.o: defined in discarded section `.text._ZN3uhd9transport3sphL19handle_overflow_nopEv[_ZN3uhd9transport3sph19recv_packet_handler6resizeEj]' of CMakeFiles/uhd.dir/usrp/usrp2/io_impl.cpp.o
`_ZN3uhd9transport3sphL19handle_overflow_nopEv' referenced in section `.data.rel.ro.local' of CMakeFiles/uhd.dir/usrp/b100/io_impl.cpp.o: defined in discarded section `.text._ZN3uhd9transport3sphL19handle_overflow_nopEv[_ZN3uhd9transport3sph19recv_packet_handler6resizeEj]' of CMakeFiles/uhd.dir/usrp/b100/io_impl.cpp.o
`_ZN3uhd9transport3sphL19handle_overflow_nopEv' referenced in section `.data.rel.ro.local' of CMakeFiles/uhd.dir/usrp/x300/x300_io_impl.cpp.o: defined in discarded section `.text._ZN3uhd9transport3sphL19handle_overflow_nopEv[_ZN3uhd9transport3sph19recv_packet_handler6resizeEj]' of CMakeFiles/uhd.dir/usrp/x300/x300_io_impl.cpp.o
`_ZN3uhd9transport3sphL19handle_overflow_nopEv' referenced in section `.data.rel.ro.local' of CMakeFiles/uhd.dir/usrp/b200/b200_io_impl.cpp.o: defined in discarded section `.text._ZN3uhd9transport3sphL19handle_overflow_nopEv[_ZN3uhd9transport3sph19recv_packet_handler6resizeEj]' of CMakeFiles/uhd.dir/usrp/b200/b200_io_impl.cpp.o
collect2: error: ld returned 1 exit status

The attached change causes ld to ignore references from .data.rel.ro.local to discarded sections.

Dave
--
John David Anglin	dave.anglin@bell.net

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