antiprism
commented
5 years ago Hi
Thanks for the build report.
There are 3 kinds of notification in the output.
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The lines with "changed in GCC 7.1" are a note indicating , I believe, that if you link with libraries built with an earlier version of GCC then there is a potential for errors.
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The lines with "directive output may be truncated" are warnings, due to the mpd_oled code assuming that certain values will never be negative. I'll try to enforce the positive values to remove the warnings.
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The build is failing because of
g++ -o mpd_oled main.o timer.o status.o status_msg.o utils.o display.o programopts.o ultragetopt.o ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o -lmpdclient -lpthread
/usr/bin/ld: bcm2835.o: in function `bcm2835_i2c_write':
bcm2835.c:(.text+0x27d0): undefined reference to `i2c_smbus_write_i2c_block_data'It looks like on your system the i2c functions are in a library that needs to be specified when linking. You can hopefully link in the library by building mpd_oled with
LDFLAGS="-li2c" make
Adrian.
wildestpixel
Able to compile on Stretch but not Buster. Output at make stage on buster :
`pi@quattro:~/mpd_oled $ PLAYER=MPD make g++ -W -Wall -Wno-unused-variable -Wno-unused-parameter -Wno-strict-aliasing -Ofast -DMPD -c -o main.o main.cpp In file included from /usr/include/c++/8/vector:69, from display_info.h:29, from display.h:32, from main.cpp:25: /usr/include/c++/8/bits/vector.tcc: In member function 'void std::vector<_Tp, _Alloc>::_M_realloc_insert(std::vector<_Tp, _Alloc>::iterator, _Args&& ...) [with _Args = {const double&}; _Tp = double; _Alloc = std::allocator]':
/usr/include/c++/8/bits/vector.tcc:413:7: note: parameter passing for argument of type 'std::vector::iterator' {aka 'gnu_cxx::normal_iterator<double*, std::vector >'} changed in GCC 7.1
vector<_Tp, _Alloc>::
^ gnu_cxx::normal_iterator<double, std::vector >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ , std::vector >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ , std::vector >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^ >' changed in GCC 7.1
_M_realloc_insert(end(), x);
^
~~~~~~ In file included from /usr/include/c++/8/vector:64, from display_info.h:29, from display.h:32, from main.cpp:25: /usr/include/c++/8/bits/stl_vector.h: In constructor 'OledOpts::OledOpts()': /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type '~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type '__gnu_cxx::normal_iterator<double~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type '__gnu_cxx::normal_iterator<double, std::vector~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type '__gnu_cxx::normal_iterator<double~~~~ /usr/include/c++/8/bits/stl_vector.h: In member function 'virtual void OledOpts::process_command_line(int, char**)': /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type 'gnu_cxx::normal_iterator<double*, std::vector~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type 'gnu_cxx::normal_iterator<double*, std::vector~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type 'gnu_cxx::normal_iterator<double*, std::vector~~~~ /usr/include/c++/8/bits/stl_vector.h:1085:4: note: parameter passing for argument of type '__gnu_cxx::normal_iterator<double*, std::vector~~~~ g++ -W -Wall -Wno-unused-variable -Wno-unused-parameter -Wno-strict-aliasing -Ofast -DMPD -c -o timer.o timer.cpp g++ -W -Wall -Wno-unused-variable -Wno-unused-parameter -Wno-strict-aliasing -Ofast -DMPD -c -o status.o status.cpp status.cpp: In member function 'std::__cxx11::string mpd_info::get_elapsed_time() const': status.cpp:410:36: warning: '%02d' directive output may be truncated writing between 2 and 3 bytes into a region of size between 1 and 6 [-Wformat-truncation=] snprintf(time_str, time_str_len, "%02d:%02d:%02d", hours, mins, secs); ^~~~status.cpp:410:36: note: directive argument in the range [-59, 59] status.cpp:410:36: note: directive argument in the range [-59, 59] status.cpp:410:11: note: 'snprintf' output between 9 and 16 bytes into a destination of size 9 snprintf(time_str, time_str_len, "%02d:%02d:%02d", hours, mins, secs);