I am trying to build a project with this dune file:
src/lib/precomputed_values/gen_values/dune:
(executable
(name gen_values)
(flags -w -32)
(libraries
;; opam libraries
stdio
async_kernel
compiler-libs
core_kernel
ppxlib
ppxlib.ast
ppxlib.astlib
async
core
ocaml-migrate-parsetree
base
ocaml-compiler-libs.common
async_unix
base.caml
sexplib0
;; local libraries
coda_runtime_config
consensus
transaction_snark
mina_state
snark_params
coda_genesis_proof
blockchain_snark
mina_base
global_signer_private_key
ppx_util
snarky.backendless
genesis_constants
pickles
test_genesis_ledger
coda_genesis_ledger
staged_ledger_diff
)
(preprocessor_deps ../../../config.mlh)
(preprocess
(pps ppx_version ppx_optcomp ppx_let ppxlib.metaquot ppx_here))
(instrumentation (backend bisect_ppx))
(modes native))
But am getting the error:
File "src/lib/precomputed_values/gen_values/dune", line 2, characters 7-17:
2 | (name gen_values)
^^^^^^^^^^
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
File "caml_startup", line 1:
Error: Error during linking (exit code 1)
Makefile:84: recipe for target 'build' failed
make: *** [build] Error 1
Could anyone point me in the right direction?
Thanks :)
Do you have the libz available on your system ? it looks like the ld linker does not find it in its search path.
libz.a is a C library that implements C function for compressing/decompressing data. Such libraries come with your OS distribution independently of Ocaml.
Ocaml tooling provides way to use C library (via stub) using ld (the standard linker) that will link your ocaml stubs to the functions of libz.a . But if the required library is missing, you get the error you quoted.
-lz is saying to ld to link your application with the libz.a (or libz.so) library that is usually located in /usr/lib - if libz.a (libz.so) is not there, the linker will fail causing the emission of the following message :
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
Related
I just build the following package: faiss and my cpp program now recognises all library header so I can include them into my program. But my programm throws undefined reference to. So when I built faiss it created a libfaiss.a and a libfaiss.so which one to link and how??? I think I have tried any solution that I could find in the internet, but my knowledge of the build/linking process is limited.
My Faiss build-directory looks like this:
faiss-1.5.3/
-libfaiss.a
-libfaiss.so
-foo.h
-foo.o
-foo.cpp
-bar.h
-...
My tries. (I am using ROS, catkin_simple and gtests)
So this is how I would usually do it:
find_library(LibFaiss faiss HINT /home/tim/faiss/faiss-1_5_3/faiss-1.5.3/)
catkin_add_gtest(test_inverted_nn test/test_inverted-nn.cc
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}})
target_link_libraries(test_inverted_nn ${LIBRARY_NAME} ${LibFaiss})
I get the following Error:
/usr/bin/ld: cannot find -lLibFaiss-NOTFOUND}
collect2: error: ld returned 1 exit status
CMakeFiles/test_inverted_nn.dir/build.make:358: recipe for target '/home/tim/catkin_ws/devel/lib/nn/test_inverted_nn' failed
make[3]: *** [/home/tim/catkin_ws/devel/lib/inverted_nn/test_inverted_nn] Error 1
I also found this Solution here Import an external library into a ROS node, but that does not work for me:
add_library(libfaiss STATIC IMPORTED)
set_target_properties(libfaiss PROPERTIES IMPORTED_LOCATION /home/tim/faiss/faiss-1_5_3/faiss-1.5.3/libfaiss.a)
target_link_libraries(test_inverted_nn ${LIBRARY_NAME} ${libfaiss})
This throws the following Error:
/usr/bin/ld: cannot find -l}
collect2: error: ld returned 1 exit status
EDIT
After correcting the not_found error I am getting the following error:
CMake Warning at /opt/ros/melodic/share/catkin/cmake/test/gtest.cmake:180 (add_executable):
Cannot generate a safe runtime search path for target
test_inverted_multi_index because files in some directories may conflict
with libraries in implicit directories:
runtime library [libz.so.1] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
/usr/local/lib
Some of these libraries may not be found correctly.
*** It does not matter what I add inside target_link_libraries I am always getting that error***
EDIT2
So with the tipp of #Aconcagua I deleted everything from the CMakeLists.txt and only added the following to my cmake options:
-DCMAKE_CXX_FLAGS=-L/home/tim/faiss/faiss-1_5_3/faiss-1.5.3/
But Im still getting the undefined reference errors. It does not make any difference
I'm trying to link my code to a library called clik. I'm passing the directory to ld with -L DIRECTORY and -lclik. DIRECTORY contains the file libclik.so. However, ld gives and error "ld: cannot find -lclik". Any ideas what could cause this?
To be more specific, I am using cmake. In cmake I have something like
find_library(CLIKLIB clik DIRECTORY)
and then for my executable I do:
target_link_libraries(executable ${CLIKLIB})
and that's how cmake generates the code for linking to clik but then ld fails.
PROBLEM SOLVED:::
I am using LEDA library in c++.
command used to make object file.
g++ -I$LEDAROOT/incl -c mult.cpp
this command runs fine
I am getting eroor while linking step.
HERE IS THE EROOR
varun#Kinley:~/Documents/LEDA/test/numbers$ g++ -L$LEDAROOT mult.o -lleda -lX11 -lm
/usr/bin/ld: cannot find -lX11
collect2: error: ld returned 1 exit status
I think I need to install some package,because when I googled this error the most of problems are solved by installing some package .
I didn't find lx11 error
some of the eroor messages that I googled.
error 1
/usr/bin/ld: cannot find -lfreetype collect2: ld returned 1 exit
status
error 2
/usr/bin/ld: cannot find -lz collect2: ld returned 1 exit status
Links where I find these posts
http://www.qtcentre.org/threads/21069-collect2-ld-returned-1-exit-status
http://www.cyberciti.biz/faq/centos-rhel-redhat-usrbinld-cannot-findlc-error/
Do I need to install some package or there is some other problem
Could be two things
1) The X11 library is installed in a non-standard path. Use the search command to see if libX11.a or libX11.so is available on your system. If yes add the directory path to the -L option.
2) You are missing the libX11 library.
In this case, login as admin and use yum (assuming linux) to install this library.
Eg:
"yum install libX11.i386" or "yum install libX11.x86_64", depending on your architecture (32 bit or 64 bit).
I am following the instructions on
http://tayefeh.wordpress.com/2009/07/06/creating-and-using-a-c-shared-library-with-eclipse-cdt-galileo-and-gnu-c-compiler-and-linker/
to build a shared library.
I have got to Step II, bullet point 16 but my attempts to build the project fail with the following error:
**** Build of configuration Debug for project UseDLL ****
make all
Building target: UseDLL
Invoking: GCC C++ Linker
g++ -L"/home/ken/workspace/testlib/Debug" -o"UseDLL" ./src/UseDLL.o -ltestlib -l/home/ken/workspace/testlib/Debug
/usr/bin/ld: cannot find -l/home/ken/workspace/testlib/Debug
collect2: ld returned 1 exit status
make: *** [UseDLL] Error 1
Can anyone advise why the build is failing? The directory does exist and ls shows
[ken#localhost Debug]$ ls /home/ken/workspace/testlib/Debug/
libtestlib.so TestClass.o
If it helps, I am running CentOS 6.3.
Thanks,
Ken
You should remove this:
-l/home/ken/workspace/testlib/Debug
It makes g++ look for a library of that name.
I'm cross compiling to an arm embedded system and receiving an error that I have questions about. Here is the error:
[ 19%] Built target cxjpeg-6b
Linking CXX shared library /home/botbear/JAUS++-2.110519- src/libraries/jaus++/2.0/lib/libcxutils.so
/home/botbear/openwrt/trunk/staging_dir/toolchain-arm_v6k_gcc-linaro_uClibc- 0.9.32_eabi/lib/gcc/arm-openwrt-linux-uclibcgnueabi/4.5.4/../../../../arm-openwrt-linux- uclibcgnueabi/bin/ld: cannot find -lpng
collect2: ld returned 1 exit status
make[2]: *** [/home/botbear/JAUS++-2.110519-src/libraries/jaus++/2.0/lib/libcxutils.so] Error 1
make[1]: *** [libcxutils/CxUtils/libcxutils/CMakeFiles/cxutils.dir/all] Error 2
make: *** [all] Error 2
As you can see the linker is looking for a static library named 'libpng'. In addition to the libpng lib., the command in the sub-make file using the -l switch to link to the following libraries: -lpng -lz -lX11 -lXtst -lpthread -Wl. All of the libraries (libpng,libz,libX11, etc) are in my host /usr/lib/ directory but my target toolchain does not have the the libraries. My question is if I manually recompile the libraries with my target compiler will that solved my problem? Or I'm going to have find and install packages for each of the libraries for my target platform.
Thanks in advance.
You seem to compile for the target, so you need target libraries. Either compiled by yourself or provided by the toolchain development environment (if you have one). The latter usually saves you some headaches (cross compiling and setting the paths where necessary).
I see you are using openwrt toolchain. Openwrt seems to have libpng as a package. I'd go with that if possible.