I just recently built and installed the hsa branch of gcc according to the associated wiki. Everything went relatively well until I got around to making the samples, vectorCopy and matrixMultiply. Here is the error output I got for matrixMultiply when running the make command (again, following the recommendations of the wiki):
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_region_get_info'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_init'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_signal_create'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_agent_iterate_regions'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_create'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_signal_store_relaxed'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_get_symbol'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_add_module'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_signal_wait_acquire'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_destroy'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_memory_allocate'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_status_string'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_iterate_agents'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_finalize'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_create'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_agent_get_info'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_queue_create'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_freeze'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_queue_add_write_index_relaxed'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_symbol_get_info'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_load_code_object'
I am using Lubuntu 15.04 with the standard kernel (3.19). I am using slightly old driver and runtime components that correspond to HSA 1.0 Provisional rather than 1.0 Final, since Okra (which is needed for HSA-OpenMP-GCC) is not yet up-to-date and can not be used with the latest drivers and firmware. I have "sanity checked" the runtime and Okra, and both tests (vector_copy and Squares, respectively) function properly. I am also able to use aparapi-lambda successfully with the same setup.
The hardware is an A10-7700k on an Asus A88x-Pro motherboard with 16Gb of RAM.
So, does anyone know why I am getting these errors? I am under the suspicion that the GCC hsa branch has been updated to follow the 1.0 Final specification which is not yet compatible with Okra, which would prevent anyone from actually being able to use the compiler until someone finally updates Okra. But, I can't be too sure about that.
edit: Here is the new makefile:
GCCHSAIL=$(GCC_HSA)/bin/gcc
LDFLAGS=-lhsa-runtime64 -lhsa-runtime-ext64 -lhsakmt -L $(GCC_HSA)/lib64 -L ~/HSA-Runtime-AMD-master/lib -L opt/hsa/lib -L ~/libhsakmt/build/lnx64a -Wl,-rpath,$(GCC_HSA)/lib64
CFLAGS=-lm -fopenmp -Wall -O3
all : matmul
clean :
rm -rf *.o matmul test.output
# GCC Specifics
matmul.o : matmul.c
$(GCCHSAIL) -c $(CFLAGS) $<
matmul : matmul.o
$(GCCHSAIL) matmul.o $(CFLAGS) -o $# $(LDFLAGS)
The old makefile had no switches making reference to required .so files. With the new makefile, now I get the following errors:
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_add_module'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_symbol_get_info'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_load_code_object'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_freeze'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_create'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_executable_get_symbol'
/hsailgcc/lib64/libgomp.so: undefined reference to `hsa_ext_program_finalize'
There are fewer errors now, though, for whatever reason, 7 of them persist.
edit edit: Problem solved. The GCC hsa branch has moved on to support HSA 1.0F and no longer depends on Okra. That means that the old driver components and old runtime I used to maintain Okra compatibility are incompatible with the present build of GCC hsa. That should be simple enough to fix. Thanks for all the help with compiler switches.
Related
I want to configure ffmpeg with libsrt (Secure Reliable Transport) protocol on linux-Ubuntu OS, I followed the steps from this link
But when run $./configure --enable-libsrt command it gives me an error:
ERROR: srt >= 1.3.0 not found using pkg-config
I modified the configuration file, it executed the above command but when i run $ make command it end up with the following errors:
LD ffmpeg_g
libavformat/libavformat.so: undefined reference to `srt_socket'
libavformat/libavformat.so: undefined reference to `srt_bind'
libavformat/libavformat.so: undefined reference to `srt_getsockopt'
libavformat/libavformat.so: undefined reference to `srt_close'
libavformat/libavformat.so: undefined reference to `srt_epoll_add_usock'
libavformat/libavformat.so: undefined reference to `srt_startup'
libavformat/libavformat.so: undefined reference to `srt_connect'
libavformat/libavformat.so: undefined reference to `srt_epoll_release'
libavformat/libavformat.so: undefined reference to `srt_listen'
libavformat/libavformat.so: undefined reference to `srt_getlasterror'
libavformat/libavformat.so: undefined reference to `srt_getlasterror_str'
libavformat/libavformat.so: undefined reference to `srt_cleanup'
libavformat/libavformat.so: undefined reference to `srt_setsockopt'
libavformat/libavformat.so: undefined reference to `srt_sendmsg'
libavformat/libavformat.so: undefined reference to `srt_clearlasterror'
libavformat/libavformat.so: undefined reference to `srt_epoll_wait'
libavformat/libavformat.so: undefined reference to `srt_epoll_remove_usock'
libavformat/libavformat.so: undefined reference to `srt_epoll_create'
libavformat/libavformat.so: undefined reference to `srt_recvmsg'
libavformat/libavformat.so: undefined reference to `srt_accept'
collect2: error: ld returned 1 exit status
Makefile:108: recipe for target 'ffmpeg_g' failed
make: *** [ffmpeg_g] Error 1
What are exact steps to enable libsrt with ffmpeg ? Am i missing anything ? Is there any patch i have to add to existing ffmpeg source ?
Thanks in advance !!!
The answer you referred to assumes the question asker was following the Ubuntu compile guide on the FFmpeg Wiki (because they claimed to be doing so). The compile guide "installs" external libraries into ~/ffmpeg_build for a variety of reasons. The libsrt instructions in that answer does the same to fit with the wiki article. Therefore, it is expected that you will use the additional compilation options as shown in the wiki to deal with this when compiling ffmpeg.
Undo whatever changes you made to configure.
Follow the linked answer and compile libsrt if you haven't already.
Now compile ffmpeg.
make distclean
PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --enable-libsrt --pkg-config-flags="--static"
Alternatively, if you don't want to have to use most of those extra options then omit -DCMAKE_INSTALL_PREFIX="$HOME/ffmpeg_build" when compiling libsrt.
I am trying to use FFmpeg libraries available from here under Windows 10 (64 bits). I downloaded version=20181126-90ac0e5, architecture=Windows-64, Linking=Dev. There are 3 folders inside that FFmpeg folder: examples, lib and include.
To use these libraries I copied the contents of the "include" folder to the "include" folder of my MinGW installation. I also copied the contents of the "lib" folder to the "lib" folder of MinGW.
I try to compile the decode_video.c example that comes inside the examples folder with the following way:
gcc decode_video.c -o decode_video.exe -lavcodec -lavutil -lavformat -lm
The compiler gives me these undefined references:
undefined reference to `avcodec_send_packet'
undefined reference to `avcodec_receive_frame'
undefined reference to `av_packet_alloc'
undefined reference to `avcodec_find_decoder'
undefined reference to `av_parser_init'
undefined reference to `avcodec_alloc_context3'
undefined reference to `avcodec_open2'
undefined reference to `av_frame_alloc'
undefined reference to `av_parser_parse2'
undefined reference to `av_parser_close'
undefined reference to `avcodec_free_context'
undefined reference to `av_frame_free'
undefined reference to `av_packet_free'
I would like to know what I am doing wrong here. Any guidance is very welcome.
I've spent quite a bit of time trying to get an expat based sample program to compile.
I was receiving the following error message when I tried to compile
gcc -Wall -lexpat line.c -o blah
line.c: In function ‘main’:
line.c:99:8: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘XML_Size’ [-Wformat]
/tmp/ccUa3vfD.o: In function `printcurrent':
line.c:(.text+0x42): undefined reference to `XML_SetDefaultHandler'
line.c:(.text+0x4d): undefined reference to `XML_DefaultCurrent'
line.c:(.text+0x60): undefined reference to `XML_SetDefaultHandler'
/tmp/ccUa3vfD.o: In function `main':
line.c:(.text+0x162): undefined reference to `XML_ParserCreate'
line.c:(.text+0x1ad): undefined reference to `XML_UseParserAsHandlerArg'
line.c:(.text+0x1c9): undefined reference to `XML_SetElementHandler'
line.c:(.text+0x1dd): undefined reference to `XML_SetCharacterDataHandler'
line.c:(.text+0x1f1): undefined reference to `XML_SetProcessingInstructionHandler'
line.c:(.text+0x2b2): undefined reference to `XML_Parse'
line.c:(.text+0x2c2): undefined reference to `XML_GetErrorCode'
line.c:(.text+0x2ca): undefined reference to `XML_ErrorString'
line.c:(.text+0x2d8): undefined reference to `XML_GetCurrentLineNumber'
collect2: ld returned 1 exit status
I had already run the following commands:
sudo apt-get install expat libexpat1 libexpat1-dev libxmltok1-dev
So I messed around for ages, trying to get the error message to go away so I could compile this (simple) little program, but to no avail.
Eventually, out of sheer randomness, I decided to switch to a Virtual Terminal.
I ran exactly the same command, this time it worked without a problem.
Can anyone tell me why this is? Is there something I need to run in order to refresh the library paths?
The linker line (i.e. the flags you give with -l and your input file names) are order-dependent. Libraries are only used to define functions used on their left side, but not on their right. Use:
gcc -Wall line.c -lexpat -o blah
See the question library is linked but reference is undefined for more information.
gcc link results with errors:
dns.cpp: undefined reference to '__res_querydomain'
dns.cpp: undefined reference to '__dn_skipname'
dns.cpp: undefined reference to '__dn_expand'
dns.cpp: undefined reference to '__res_query'
Is there another library that I need to link to?
Adding -lresolv solved this for me.
Instructions in the blinky.zip, gcc-section, Teensy++ v.2. Makefile and blinky.c are in the zip. I modified the blinky.c by defining F_CPU at the start because not using Makefile, please, see below. So why do I get the errs and how can I compile the C-files for at90usb1286 chip?
$ avr-gcc -mmcu=atmega88 blinky.c
In file included from blinky.c:28:
/usr/local/lib/gcc/avr/4.2.2/../../../../avr/include/util/delay.h:90:3: warning: #warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed"
/tmp//ccB66ecl.o: In function `main':
blinky.c:(.text+0x3e): undefined reference to `usb_init'
/tmp//ccB66ecl.o: In function `morse_character':
blinky.c:(.text+0x24c): undefined reference to `print_P'
blinky.c:(.text+0x36e): undefined reference to `print_P'
blinky.c:(.text+0x378): undefined reference to `usb_debug_putchar'
blinky.c:(.text+0x37e): undefined reference to `print_P'
blinky.c:(.text+0x386): undefined reference to `print_P'
blinky.c:(.text+0x390): undefined reference to `usb_debug_putchar'
blinky.c:(.text+0x394): undefined reference to `usb_debug_putchar'
blinky.c:(.text+0x416): undefined reference to `print_P'
blinky.c:(.text+0x4fa): undefined reference to `print_P'
blinky.c:(.text+0x6f8): undefined reference to `print_P'
/tmp//ccB66ecl.o: In function `morse_P':
blinky.c:(.text+0x834): undefined reference to `print_P'
Those are link errors. You could do a compile only (notice that I added the -c flag):
avr-gcc -c -mmcu=atmega88 blinky.c
You would then have to link that with your other objects to create a binary.
Alternately, you could provide all the source files in a single command line and the compiler will compile and link them:
avr-gcc -mmcu=atmega88 blinky.c print.c usb_debug_only.c