I have a very old C program and want to compile to Windows. So I try doing this:
gcc -DNO_GLIBC=1 sakide.c -o sakide.exe
and this returns:
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0xa4): undefined reference to `ekiGetLibVersion'
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0x6b6): undefined reference to `ekiGetLibVersion'
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0x8ff): undefined reference to `ekiEncodeUrl'
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0x954): undefined reference to `ekiDecodeUrl'
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0x993): undefined reference to `ekiDecodeUrl'
\AppData\Local\Temp\ccx7khiy.o:sakide.c:(.text+0xa62): undefined reference to `ekiGetKeyInfo'
collect2.exe: error: ld returned 1 exit status
This ekiGetLibVersion is in a .h file:
INT EKIAPI ekiGetLibVersion(char *outBuffer, LPINT outBufferSize);
and I also have a .dll name of it.
Ive never compiled anything with C though
On windows you cannot link against directly with the .dll, you have to link the import library, name .lib. For more information, refer:
On dynamic linking:
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682592(v=vs.85).aspx
On implicit linking:
https://msdn.microsoft.com/en-us/library/d14wsce5.aspx
You are getting linker errors.
You need to link the library (or object file) where those functions are defined.
Undefined reference usually means the compiler has not seen a proper declaration for this variable. Did you include the header file (which defines this variable) in your C program ?
#include "header_file.h"
Related
As you may imagine, it's a homework of Operating Systems and I'm asked to add function key Shift+F7 to show the number of running process.
I read the source code of command ps on GitHub (MINIX version 3.2.1) and try to implement a function that can finish the task in file /usr/src/servers/is/dmp_kernel.c. However, when I try to run make, it complains about undefined reference like
dmp_kernel.o: In function `running_proc_num':
dmp_kernel.c:(.text+0x1e): undefined reference to `chdir'
dmp_kernel.c:(.text+0x42): undefined reference to `fopen'
dmp_kernel.c:(.text+0x72): undefined reference to `fscanf'
dmp_kernel.c:(.text+0x8b): undefined reference to `fclose'
dmp_kernel.c:(.text+0xc4): undefined reference to `log10'
dmp_kernel.c:(.text+0xcc): undefined reference to `ceil'
dmp_kernel.c:(.text+0x119): undefined reference to `log10'
dmp_kernel.c:(.text+0x121): undefined reference to `ceil'
dmp_kernel.c:(.text+0x170): undefined reference to `fopen'
dmp_kernel.c:(.text+0x1bc): undefined reference to `fscanf'
dmp_kernel.c:(.text+0x1d3): undefined reference to `fclose'
dmp_kernel.c:(.text+0x210): undefined reference to `wait'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I've already include the headers like stdio.h, math.h, unistd.h, and sys/wait.h. In the answer to one Stack Overflow question, I learnt that the reason for this issue is that the linker doesn't link a complete C library under MINIX. However, I usually use CMake and really have no idea to solve such issue. I don't even know how to "explicitly" link the functions using make.
I really look forward for your help!
The Makefile looks like
.include <bsd.own.mk>
PROG= is
SRCS= main.c dmp.c dmp_kernel.c dmp_pm.c dmp_fs.c dmp_rs.c dmp_ds.c dmp_vm.c
DPADD+= ${LIBSYS}
LDADD+= -lsys
MAN=
BINDIR?= /sbin
CPPFLAGS.dmp_kernel.c+= -I${NETBSDSRCDIR}
CPPFLAGS.dmp_rs.c+= -I${NETBSDSRCDIR}
CPPFLAGS.dmp_vm.c+= -I${NETBSDSRCDIR}
# This setting must match the kernel's, as it affects the IRQ hooks table size.
.if ${USE_APIC} != "no"
CFLAGS+= -DUSE_APIC
.endif
.include <minix.service.mk>
I have been trying to compile and link a test file written in c and which can communicate with FMILibrary of JModelica. I was able to compile and link it and run it in linux systems. coming to the Windows, I am using mingw-64 compiler to compile and link the test file with FMILibrary, but I am getting undefined reference errors. I was able to compile and run it on 32 bit mingw but I need to compile and link it with 64 bit compiled binaries.
My command goes like this:
gcc -I <..fmilib\include> -L <..fmilib\lib> -lfmilib -o testfile testfile.c fmivars.c
And the following is the result that is getting printed out as a result
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x9b): undefined reference to `__imp_fmi2_import_get_real'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0xd6): undefined reference to `__imp_fmi2_import_get_integer'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x111): undefined reference to `__imp_fmi2_import_get_boolean'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x14c): undefined reference to `__imp_fmi2_import_get_string'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x187): undefined reference to `__imp_fmi2_import_set_real'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x1c2): undefined reference to `__imp_fmi2_import_set_integer'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x1fd): undefined reference to `__imp_fmi2_import_set_boolean'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x238): undefined reference to `__imp_fmi2_import_set_string'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x27a): undefined reference to `__imp_fmi2_import_new_discrete_states'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x2b6): undefined reference to `__imp_fmi2_import_collect_model_counts'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x30b): undefined reference to `__imp_fmi2_status_to_string'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x37e): undefined reference to `__imp_jm_vsnprintf'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x395): undefined reference to `__imp_fmi2_status_to_string'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x437): undefined reference to `__imp_jm_vsnprintf'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x556): undefined reference to `__imp_fmi2_import_get_version'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x575): undefined reference to `__imp_fmi2_import_get_types_platform'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x594): undefined reference to `__imp_fmi2_import_get_number_of_continuous_states'
C:\Users\...\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x5a8): undefined reference to `__imp_fmi2_import_get_number_of_event_indicators'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x64a): undefined reference to `__imp_fmi2_import_instantiate'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x690): undefined reference to `__imp_fmi2_import_set_debug_logging'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x6af): undefined reference to `__imp_fmi2_status_to_string'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x6df): undefined reference to `__imp_fmi2_import_set_debug_logging'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x718): undefined reference to `__imp_fmi2_import_setup_experiment'
C:\Users\....\AppData\Local\Temp\ccFR53Q1.o:testfile.c:(.text+0x733): undefined reference to `__imp_fmi2_import_enter_initialization_mode'
Is there any macro or anything set on the FMILibrary to compile with 64 bit mingw compiler on windows 64 bit? Thanks.
Assuming the library libfmilib.x.y.z provided the missing symbols then on the linker's/compiler's command line move it to the right of the .c-files requiring them
gcc -I <..fmilib\include> -L <..fmilib\lib> -o testfile testfile.c fmivars.c -lfmilib
Thank you everyone for helping me. I finally solved my problem and was able to run the code. I installed dependency walker as suggested by #PilouPili and found out that my application is looking for the library in the same folder(I don't know for some reason) and it was unable to find it. So, I copied all the static and dynamic libraries and I pasted in the folder where my testfile is. Also I changed the command line as suggested by #alk and moved the -lfmilib to the end. And I used the dynamic library instead of static one. But anyways my application runs now. Thank you so much for helping out.
I am trying to compile some programs i have found on github. The repository is at the following URL:
[enter link description here][1]
https://github.com/iagox86/nbtool
I have little knowledge of C programs, however when i try to use GCC with the following command i receive errors.
the command i have tried is:
gcc -o dnslogger dnslogger.c
I receive the following error:
/tmp/ccLRFQbp.o: In function `dns_callback':
dnslogger.c:(.text+0x51): undefined reference to `dns_create_from_packet'
dnslogger.c:(.text+0x5f): undefined reference to `dns_create'
dnslogger.c:(.text+0x10e): undefined reference to `dns_add_question'
dnslogger.c:(.text+0x179): undefined reference to `dns_add_answer_A'
dnslogger.c:(.text+0x1dc): undefined reference to `dns_add_answer_AAAA'
dnslogger.c:(.text+0x214): undefined reference to `dns_to_packet'
dnslogger.c:(.text+0x236): undefined reference to `udp_send'
dnslogger.c:(.text+0x260): undefined reference to `dns_create_error_string'
dnslogger.c:(.text+0x282): undefined reference to `udp_send'
dnslogger.c:(.text+0x28e): undefined reference to `safe_free'
dnslogger.c:(.text+0x29a): undefined reference to `dns_destroy'
dnslogger.c:(.text+0x2a6): undefined reference to `dns_destroy'
/tmp/ccLRFQbp.o: In function `dns_poll':
dnslogger.c:(.text+0x2d7): undefined reference to `select_group_create'
dnslogger.c:(.text+0x304): undefined reference to `select_group_add_socket'
dnslogger.c:(.text+0x321): undefined reference to `select_set_recv'
dnslogger.c:(.text+0x336): undefined reference to `select_group_do_select'
/tmp/ccLRFQbp.o: In function `cleanup':
dnslogger.c:(.text+0x36b): undefined reference to `select_group_destroy'
dnslogger.c:(.text+0x37a): undefined reference to `safe_free'
dnslogger.c:(.text+0x384): undefined reference to `print_memory'
/tmp/ccLRFQbp.o: In function `main':
dnslogger.c:(.text+0x6ed): undefined reference to `safe_malloc_internal'
dnslogger.c:(.text+0x718): undefined reference to `winsock_initialize'
dnslogger.c:(.text+0x934): undefined reference to `dns_do_test'
dnslogger.c:(.text+0xaab): undefined reference to `udp_create_socket'
dnslogger.c:(.text+0xb5f): undefined reference to `drop_privileges'
collect2: error: ld returned 1 exit status
the repository has a Makefile file which i suspect is used to compile the programs, but i am not sure of the exact commands to use on ubuntu, i have tried some of the commands but i receive errors when using the supplied commands from the file.
the makefile is located here:
https://github.com/iagox86/nbtool/blob/master/Makefile
How can i compile these programs from ubuntu command line?
Just run make.
git clone https://github.com/iagox86/nbtool
cd nbtool
make
You need some programs to compile everything (samples) though.
(make will complain if they're missing on your system)
If you're more interested in the Makefile itself, use the links in the comments or read specific documentation for example Gnu Make
(I chose Gnu Make, as tags specify ubuntu explicitly)
This question already has answers here:
What is an undefined reference/unresolved external symbol error and how do I fix it?
(39 answers)
Closed 6 years ago.
i tried to use make on my c source code and created executable file. but the executable file did not work the intended task. even if the make file compiled and produced the executable file when i try to compile the .c file individually it gave many undefined reference problem
The errors are
/tmp/cc4tx0BG.o: In function `main':
cubist.c:(.text+0xdc): undefined reference to `Of'
cubist.c:(.text+0xe7): undefined reference to `Of'
cubist.c:(.text+0xfa): undefined reference to `Of'
cubist.c:(.text+0x10f): undefined reference to `KRInit'
cubist.c:(.text+0x114): undefined reference to `ExecTime'
cubist.c:(.text+0x127): undefined reference to `PrintHeader'
cubist.c:(.text+0x139): undefined reference to `Of'
[...]
cubist.c:(.text+0xb79): undefined reference to `MaxAtt'
cubist.c:(.text+0xb83): undefined reference to `InitialiseEnvData'
cubist.c:(.text+0xb8a): undefined reference to `XVAL'
cubist.c:(.text+0xb93): undefined reference to `CrossVal'
cubist.c:(.text+0xb9a): undefined reference to `SingleCttee'
cubist.c:(.text+0xb9f): undefined reference to `ExecTime'
cubist.c:(.text+0xbab): undefined reference to `Of'
collect2: error: ld returned 1 exit status
please, could any body tells how to use make and building executables in Linux work.
I think (not sure) that you are saying that you successfully produced an executable using Make (at least that's how I interpret "use make on my c source code and created executable file" -- do correct me if I'm wrong!). If that's the case, invoke make like this: make -B --trace, and you'll see the exact commands that were used to build the executable, and then you'll hopefully know which compiler/linker flags or libraries you missed while trying to build stuff manually.
When I try to compile a little lua program, I get these errors :
/usr/lib//liblua52.so: undefined reference to `dlsym'
/usr/lib//liblua52.so: undefined reference to `dlerror'
/usr/lib//liblua52.so: undefined reference to `dlopen'
/usr/lib//liblua52.so: undefined reference to `dlclose'
Of course, I link with -ldl. I have lua5.2-dev installed on my ubuntu.
If you need any more infos ask me.
Thanks!
When I try to compile a little lua program, I get these errors
No. You get these errors when you link the program.
The fix is to add -ldl at the end of your link line.
The easy way to get this error is to have your PLAT variable set wrong in the Makefile. You need to set it in the top level Makefile and the src/Makefile.
The legal values show up about 10 lines down from the definition.
Ensure -ldl is exactly at the end of your link line as Employed Russian mentioned