I have a Cmake executable that has been created using ADD_EXECUTABLE.
The executable needs (links to) shared libraries that have been created
also part of the project.
As a final step I want to run this executable as part of the build process to
create some additional files for the build.
so
ADD_EXECUTABLE(foo)
ADD_CUSTOM_COMMAND(OUTPUT out1
WORKING_DIRECTORY dir1
COMMAND foo args
...)
However when the custom command runs it gives an error
.../foo: error while loading shared libraries: libbar.so.1: cannot open shared object file: No such file or directory
make[2]: *** [out1] Error 127
make: *** [all] Error 2
The problem is that the LD_LIBRARY_PATH is not set for the executable to load the library
libbar.so.1. How do in a cross-platform manner set the load library settings in cmake.
I don't want to use RPATH because it actually embeds those paths in the executable, which I
don't want.
Related
I want to generate .lst files for my source file. I am successfully able to generate the executable.
But I don't know how to generate .lst files for my source files.
get_property(allsrcfiles TARGET myExe PROPERTY SOURCES)
foreach(srcfile IN LISTS allsrcfiles)
set_source_files_properties(${srcfile} PROPERTIES COMPILE_FLAGS "-Wa, anhlmsd=${srcfile}.lst")
endforeach()
I have added the above script in my CMakelists.txt, if I add the above script I am getting the following error
[100%] Linking C executable myExe
dld: error: Can't open file 'CMakeFiles/myExe.dir/src/sample.c.obj': No such file or directory
CMakeFiles\myExe.dir\build.make:101: recipe for target 'myExe' failed gmake[2]: *** [myExe] Error 1
CMakeFiles\Makefile2:93: recipe for target 'CMakeFiles/myExe.dir/all' failed
gmake[1]: *** [CMakeFiles/myExe.dir/all] Error 2
Makefile:101: recipe for target 'all' failed
gmake: *** [all] Error 2
sample.c.obj file is getting generated without source_file_properties.
compiler : WIND RIVER
Target : ppc - embedded
Host : windows
is list file generation commands depends on the compiler?
I have integrated a tool that generates some code from a text file in CMake based build environment.
This tool is also able to generate the dependency file in the GNU make format (pretty much like gcc -MD does it for c files).
I would like to include this dependency file in makefiles generated by CMake in order to correctly rebuild when necessary. Unfortunately, I could not find the correct way to do this.
I tried:
Generated Dependency Files in CMake , but there was no answer
https://cmake.org/cmake/help/latest/command/add_custom_command.html?highlight=add_custom_command has the DEPFILE option but it only works for Ninja
Has anyone had a similar issue?
try to define your file as dependency of your add_custom_target:
cmake_minimum_required(VERSION 3.0)
project(Custom_Command_TEST)
add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/your_gen_file.txt"
COMMAND /bin/date > "${CMAKE_BINARY_DIR}/your_gen_file.txt"
COMMAND /bin/echo "RUNNING COMMAND")
add_custom_target(GenerateFile
/bin/echo "RUNNING TARGET"
DEPENDS "${CMAKE_BINARY_DIR}/your_gen_file.txt")
add_executable(${PROJECT_NAME} main.cpp)
add_dependencies(${PROJECT_NAME} GenerateFile)
will only rebuild the target GenerateFile. You could put your .txt generation step as COMMAND in add_custom_command.
output of first make:
[ 33%] Generating your_gen_file.txt
RUNNING COMMAND
RUNNING TARGET
[ 33%] Built target GenerateFile
[ 66%] Building CXX object CMakeFiles/Custom_Command_TEST.dir/main.cpp.o
[100%] Linking CXX executable Custom_Command_TEST
[100%] Built target Custom_Command_TEST
output second make:
RUNNING TARGET
[ 33%] Built target GenerateFile
[100%] Built target Custom_Command_TEST
In case you want to rebuild everything again, you'll want to make clean.
You could also check this older post
I am working on quickrank: https://github.com/hpclab/quickrank. when I compile it I get error
cmake .. -DCMAKE_CXX_COMPLIER=/usr/bin/g++ -DCMAKE_BUILD_TYPE=Release
You have called ADD_LIBRARY for library pugixml without any source files. This typically indicates a problem with your CMakeLists.txt file
-- Configuring done
CMake Error: Cannot determine link language for target "pugixml".
CMake Error: CMake can not determine linker language for target: pugixml
CMake Error: CMake can not determine linker language for target: pugixml
-- Generating done
-- Build files have been written to: /home/students/s4438236/quickrank/build_
s4438236#moss:~/quickrank/build_$ make
make[2]: *** No rule to make target `CMakeFiles/pugixml.dir/build'. Stop.
make[1]: *** [CMakeFiles/pugixml.dir/all] Error 2
make: *** [all] Error 2
I do find source file under the lib\pugixml folder, how can I fix this error?
When you call the add_library CMake command, you must provide source files for this target. If we examine the top-level CMakeLists.txt file, we see where the error is occurring:
# external libraries
file(GLOB_RECURSE pugixml_sources ${CMAKE_SOURCE_DIR}/lib/pugixml/src/*.cpp)
add_library(pugixml STATIC ${pugixml_sources})
The CMake error suggests that the pugixml_sources variable is empty, which hints that the /lib/pubixml may have also been empty. If you initially didn't run the git clone command with --recursive, you would not have gotten the pugixml submodule.
Seeing as you said the pugixml sources are now there, I would suggest deleting your CMake cache and the CMake build folder. Running CMake again from scratch will likely allow it to see the pugixml source files.
I have a CMakeLists.txt file that is building a shared lib as en ExternalProject and this lib needs to be installed in a specific location so that it can be picked up by the main project at build time. I am using the following line to perform the install process:
install(FILES $<TARGET_FILE:of_shared> DESTINATION oF/lib)
However, this fails:
Install the project...
-- Install configuration: ""
CMake Error at cmake_install.cmake:31 (FILE):
file INSTALL cannot find
"/Users/me/packages/builds/x86_64/of-0.9.3-osx-release/$<TARGET_FILE:of_shared>".
make[3]: *** [install] Error 1
make[2]: *** [of_shared-prefix/src/of_shared-stamp/of_shared-install] Error 2
make[1]: *** [CMakeFiles/of_shared.dir/all] Error 2
make: *** [all] Error 2
This might be a compatibility bug of some sort, maybe between CMake versions. I am using CMake 2.8.12.
These are the related CMake lines:
add_library(core OBJECT ${OF_SOURCE_FILES})
add_library(of_shared SHARED $<TARGET_OBJECTS:core>)
set_target_properties(of_shared PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
set_target_properties(of_shared PROPERTIES OUTPUT_NAME openFrameworks)
target_link_libraries(of_shared ${OF_CORE_FRAMEWORKS} ${OF_ADDON_FRAMEWORKS} ${OF_CORE_LIBS} ${OF_ADDON_LIBS})
install(FILES $<TARGET_FILE:of_shared> DESTINATION oF/lib)
install(FILES libs/fmodex/lib/osx/libfmodex.dylib DESTINATION oF/lib)
install(DIRECTORY libs/glut/lib/osx/GLUT.framework DESTINATION .)
Obviously that bit with the $<TARGET_FILE:of_shared> is failing. Apart from that, everything is working. I can see the shared lib being created.
I have found the solution myself. Instead of using:
install(FILES $<TARGET_FILE:of_shared> DESTINATION openFrameworks/lib)
One should use:
install(TARGETS of_shared LIBRARY DESTINATION openFrameworks/lib)
In that case of_shared is the name of the library.
I am able to do this without CMake using a handwritten Makefile, like so:
g++ $(CXSCINC) -c -fPIC cellComplex_extern.cpp -o cellComplex_extern.o
g++ $(CXSCINC) -shared -Wl -o cellComplex_lib.so cellComplex_extern.o $(CXSCLIB) -lcxsc
This gets me shared library cellComplex_lib.so, which then gets picked up by ctypes as a dynamically linked library (lib = ctypes.cdll.LoadLibrary('./cellComplex_lib.so') for later use.
My project has moved to CMake as a build system and I am looking to emulate the functionality of my Makefile above.
So far I have discovered the add_library() command for CMakeLists.txt, but the link to the CXSC library is never made (as evidenced by horrible complaining when I run make after cmake.
How can I tell CMake to build cellComplex_lib with the third-party library CXSC?
-- non-working CMakeLists.txt --
add_library(include/python/cellComplex_extern OBJECT
include/python/cellComplex_extern.cpp ${all_headers})
add_library(include/python/cellComplex_lib SHARED
include/python/cellComplex_extern)
target_link_libraries(include/python/cellComplex_lib ${CXSC_LIB_DIR}/libcxsc.a)
Result of running cmake followed by make:
.
.
.
[ 75%] Built target include/python/cellComplex_extern
Linking CXX shared library libinclude/python/cellComplex_lib.dylib
ld: can't open output file for writing: libinclude/python/cellComplex_lib.dylib, errno=2 for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [libinclude/python/cellComplex_lib.dylib] Error 1
make[1]: *** [CMakeFiles/include/python/cellComplex_lib.dir/all] Error 2
make: *** [all] Error 2
I think you need to use target_link_libraries
target_link_libraries(include/python/cellComplex_lib ${CXSLIB})
This is what I use during Win32 development:
link_directories(${LIB_ROOT_DIR}/lib ${LIB_ROOT_DIR2}/lib/morelibs)
add_library(MyDll1 SHARED File1.cpp File2.cpp)
add_library(MyDll2 SHARED File3.cpp File4.cpp)
add_dependencies(MyDll2 Dll1)
target_link_libraries(MyDll2 Dll1 some.lib another.lib)
Here you specify that Dll2 requires Dll1 and two other external lib's.