I am running the test tcl module from the Swig tutorial site: http://www.swig.org/tutorial.html.
However, when I enter: gcc -shared example.o example_wrap.o -o example.so into the command line, it returns:
Undefined symbols for architecture x86_64:
"_TclFreeObj", referenced from:
__wrap_My_variable_get in example_wrap.o
__wrap_My_variable_set in example_wrap.o
.
.
.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Any suggestions on what the issue may be?
Related
I installed testu01 on my mac (OS El Capitan). I want to compile one of the examples using gcc, code below. But I get the following error, below. Did anybody run TestU01 on x86_64 successfully? Any other suggestions?
MacBook-Pro-2:examples Joan$ gcc -std=c99 -Wall -O3 -o birth1 birth1.c -I/Users/TestU01/TestU01-1.2.3/include -I/Users/TestU01/TestU01-1.2.3/mylib
Undefined symbols for architecture x86_64:
"_smarsa_BirthdaySpacings", referenced from:
_main in birth1-c99705.o
"_ulcg_CreateLCG", referenced from:
_main in birth1-c99705.o
"_ulcg_DeleteGen", referenced from:
_main in birth1-c99705.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Can I use for example
gcc -o -S output.s abs.c
to generate an assembly file with name output.s? It seems like I can't. When I try to do that, I got following error message.
Undefined symbols for architecture x86_64: "_main", referenced from:
implicit entry/start for main executable ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit
code 1 (use -v to see invocation)
I do not intend to use the linker, just try to examine the assembly code.
-o must be followed by the name of the output file. So, this would work:
gcc -S abc.c -o output.s
Ld /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug/c normal x86_64
cd /Users/ashutoshagarwal/Desktop/c
setenv MACOSX_DEPLOYMENT_TARGET 10.9
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -L/Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug -F/Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug -filelist /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Intermediates/c.build/Debug/c.build/Objects-normal/x86_64/c.LinkFileList -mmacosx-version-min=10.9 -framework Foundation -Xlinker -dependency_info -Xlinker /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Intermediates/c.build/Debug/c.build/Objects-normal/x86_64/c_dependency_info.dat -o /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug/c
Undefined symbols for architecture x86_64:
"_add_history", referenced from:
_main in main.o
"_readline", referenced from:
_main in main.o
_source in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I am getting Apple-Mach-O Linker (Id) Error, have sent hours trying to fix this one, Dunno what to do.
It looks like you are using the GNU readline and GNU history libraries, which are available, by default, on the mac in libedit.dylib:
$ nm /usr/lib/libedit.dylib | fgrep readline
0000000000009899 T _readline
000000000001f444 D _readline_echoing_p
000000000001f400 D _rl_readline_name
000000000001f3f8 D _rl_readline_version
$ nm /usr/lib/libedit.dylib | fgrep add_history
000000000000acbc T _add_history
(the T indicates that the symbol is in the library's text section).
Therefore you need to add -ledit to your linker command line. If you are using Xcode then you can add libedit.dylib to the list of libraries to link against or if you are using make then you probably have to edit the LIBS variable in your Makefile.
The error message:
Undefined symbols for architecture x86_64: "_add_history", referenced from: _main in main.o
"_readline", referenced from: _main in main.o _source in main.o ld: symbol(s) not found for
architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)'
Tells you that the linker cannot find the symbols readline and add_history. Without seeing your source code, and the precise linker and compiler command-lines, it's hard to speculate the exact cause. A likely cause is that you failed to link with external libraries, or other modules of your program.
Ceeloss-MacBook-Pro:desktop ceelos$ gcc -o prog -I/usr/local/include test.c
Undefined symbols for architecture x86_64:
"_fftw_destroy_plan", referenced from:
_main in test-IBqBdS.o
"_fftw_execute", referenced from:
_main in test-IBqBdS.o
"_fftw_plan_dft_1d", referenced from:
_main in test-IBqBdS.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Ceeloss-MacBook-Pro:desktop ceelos$
What's this telling me?
It's telling you that you forgot to use -L and -l to tell gcc where the FFTW libraries are and what they're called.
I try to build an example from the book "hacking and securing iOS Applications" by Jonathan Zdziarski, compiling an example with a lot of object-files created. but when compiling the binary with:
export PLATFORM=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform
$PLATFORM/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -o launchd launchd.o syscalls.o -static -nostartfiles -nodefaultlibs -nostdlib -W1,-e,_main
the terminal says:
Undefined symbols for architecture armv7:
"start", referenced from:
-u command line option
ld: symbol(s) not found for architecture armv7
collect2: ld returned 1 exit status
Normally, this message shows up, when libraries are missing, but how can i find out, which one? I'm pretty sure, there's no problem with the source code.
-arch armv7 -isysroot -L$(SDK) -L$(SDK)/usr/lib/system