linker

问题 I'm trying to install the slam package, but it seems to fail on my system. I'm running ubuntu 12.04. I thought it was a missing library or something so I installed a few that match liblas, but no dice. * installing *source* package ‘slam’ ... ** package ‘slam’ successfully unpacked and MD5 sums checked ** libs gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG -fpic -O3 -pipe -g -c grouped.c -o grouped.o gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG -fpic -O3 -pipe -g -c sparse.c -o sparse.o gcc

问题 When you use cc(1) to link a program, it will invoke a default linker command. For instance, your version of the compiler may have been built to use /usr/bin/ld by default on a unix-like platform. Is there a way to specify a different linker command that cc(1) (or c++(1) ) should use (e.g., /usr/local/bin/ld instead of /usr/bin/ld )? I'm interested mostly in gcc and clang. I'm not looking for methods that involve running the various compilation steps separately (e.g., pre-process, compile,

问题 I have this class with variable configuration parameters. I want to include it in other classes: JugadorHumano , JugadorIA , Main , PartidaClasica , PartidaMision . #pragma once class Configuracion { public: static int MAX_ATAQUES; static int DIV_TERRITORIOS; }; int Configuracion::MAX_ATAQUES = 5; int Configuracion::DIV_TERRITORIOS = 3; What I want is to be able to modify or read the values from the other classes. I can't declare a static variable and define it in the declaration. I can't let

问题 When attempting to run a program I just compiled successfully, I get the following error: ./src/sensors/laser_scan_producer: error while loading shared libraries: liblcm.so.1 : cannot open shared object file: No such file or directory ls /usr/local/lib/liblcm* yields /usr/local/lib/liblcm.la /usr/local/lib/liblcm.so /usr/local/lib/liblcm.so.1 /usr/local/lib/liblcm.so.1.2.0 I have executed sudo ldconfig several times and added /usr/local/lib to LD_LIBRARY_PATH for the sake of redundancy. This

问题 after upgrading to Ubuntu 11.10, I've found that many of my old and current developments can't be compiled anymore. I've reduced the problem to a simple example: #include <X11/Xlib.h> int main() { Display* display = XOpenDisplay(":0.0"); XCloseDisplay(display); return 0; } Compiling it using: g++ -lX11 test.cpp or g++ -c -o test.o test.cpp g++ -lX11 -o test test.o Causes a failure to happen: /tmp/ccBAOpzy.o: In function `main': test.cpp:(.text+0x11): undefined reference to `XOpenDisplay' test

问题 I would like to write tests for a C library, in C. I'd like to mock out some functions for the test. Suppose my library is compiled from the following source: /* foo.h */ int myfunction(int x, int y); /* foo.c */ #include "foo.h" static int square(int x) { return x * x; } int myfunction(int x, int y) { return square(x) + square(y); } I want to write a test like this: /* foo_test.c */ #include "foo.h" static int square(int x) { return x + 1; } int main(void) { assert(myfunction(0, 0) == 2);

问题 This question already has answers here : What is an undefined reference/unresolved external symbol error and how do I fix it? (32 answers) Closed 5 years ago . I've got this MFC application I'm working on that needs to have an embedded database. So I went hunting for a slick, fast "embeddable" database for it and stumbled accross SQLite. I created a DB with it, and I created a static library project with Visual Studio 2008. the library project will be used in another main project. In the

问题 I have some c code that utilizes the igraph library. I would like to put an R wrapper around it and send it off to CRAN as an R package. igraph already has an R port on CRAN, so it would make sense for my R package 'foo' to depend on R's igraph. Since foo uses its own C code that depends on the C igraph, how can I link my C functions to the original igraph library? I've read that this is done in a file called Makevars, but linking to an external library is very hairy. If this isn't possible,

问题 I am having trouble installing pyipopt on ubuntu 12.04. During linking, I receive the error: /usr/bin/ld: cannot find -lcoinhsl Even though I know that this library is installed and the .so and .la files are available in /home/mostafa/MyBuilds/CoinIpopt/build/lib/ does anyone have a solution for this? below is the complete return of running setup.py build: root@ubuntu:~/MyBuilds/pyipopt# sudo python setup.py build running build running build_ext building 'pyipopt' extension gcc -pthread -fno

问题 We are using a library by another vendor, which apparently was compiled with the wrong flags, namely _ITERATOR_DEBUG_LEVEL = 0 in 32bit-Debug-mode. While I have already filed a bug report with them, I need an intermediate solution. We do not use stl ourselves, so I am free to change this flag for the subproject that uses said library. But I cannot figure out how to do so. What I tried an didn't work: /D_ITERATOR_DEBUG_LEVEL=0 > LINK : warning LNK4044: unrecognized option '/D_ITERATOR_DEBUG