dynamic-linking

问题 On linux I am trying to create a shared library, libbar.so, that embeds a commercial static library (licensing is fine). The commercial library has 4 versions: libfoo-seq.a, libfoo-mt.a, libfoo-seq.so, and libfoo-mt.so (they all provide the same symbols, just the code is sequential/multi-threaded, and the lib is static/shared). Of these four I want my code always to use the sequential foo library, so when I create libbar.so I link together my object files and libfoo-seq.a. The problem is that

问题 During working on some project, I faced the issue that I can't build so library. I have got the error like: relocation R_X86_64_PC32 against symbol '' can not be used when making a shared object; recompile with -fPIC Eventually I managed to find the root cause. And it was recursive function in the library. For example, I have the following well know example: .section .text .globl factorial .type factorial,STT_FUNC factorial: push %rbp mov %rsp,%rbp mov 16(%rbp),%rax cmp $1,%rax je end

问题 I'm writing some libraries in C which contain functions that I want to call from Python via ctypes. I've done this successfully another library, but that library had only very vanilla dependencies (namely fstream , math , malloc , stdio , stdlib ). The other library I'm working on has more complicated dependencies. For example, I'll try to use fftw3 . As a test, I'll just try to compile a simple .cpp file containing: int foo() { void *p = fftw_malloc( sizeof(fftw_complex)*64 ); fftw_free(p);

问题 I have 2 libraries: test.1 and test.2 . Both libraries contain a single global extern "C" void f(); function, with different implementations (just a cout for the test). I did the following test: Test 1 Dynamic linking: If I add libtest.1.so and then libtest.2.so in the makefile of the executable and then call f(); in main , libtest.1.so->f() is called. If I change the order in the makefile, libtest.2.so->f() is called Test 2 Static linking: Absolutely the same happens with static libraries

问题 I'm having two problems related to the same issue: I have a shared object saved in `pwd`/lib and while the executable that uses it compiles successfully (by using -l and -L switches), at runtime, it's giving me grief. If I try to run LD_LIBRARY_PATH=/my/absolute/path/to/library/directory ./test it works fine. But if I export LD_LIBRARY_PATH=/my/absolute/path/to/library/directory and do ./test it says that it can't find the shared library. However, if I do LD_LIBRARY_PATH=$LD_LIBRARY_PATH .

问题 is it possible to compile SDL library program into exec and run it without having "sdl.dll"? for example let say i wrote sdl program and it works and everything but the thing is to run the program on windows, i need to have "sdl.dll" within the same folder or system folder. is it possible to compile it so that i can just take the exec with me without needing to have "sdl.dll" along with it? i am using visual studio 2010 express. 回答1: Typically the procedure for this kind of stuff is: Download

问题 Given ls -lrt /usr/lib/libvpx* results lrwxrwxrwx 1 root root 15 Feb 9 2012 /usr/lib/libvpx.so.1.0 ->libvpx.so.1.0.0 lrwxrwxrwx 1 root root 15 Feb 9 2012 /usr/lib/libvpx.so.1 -> libvpx.so.1.0.0 -rw-r--r-- 1 root root 646120 Feb 9 2012 /usr/lib/libvpx.so.1.0.0 ls -lrt /usr/lib/libschroedinger* results lrwxrwxrwx 1 root root 29 Feb 8 2012 /usr/lib/libschroedinger-1.0.so.0 ->libschroedinger-1.0.so.0.11.0 -rw-r--r-- 1 root root 774044 Feb 8 2012 /usr/lib/libschroedinger-1.0.so.0.11.0 ls -lrt /usr

问题 BACKGROUND: If an executable file has a external data reference, which is defined in a shared object, the compiler will use copy relocation and place a copy in its .bss section. Copy relocation is detailed in this site: http://www.shrubbery.net/solaris9ab/SUNWdev/LLM/p22.html#CHAPTER4-84604 However, my question is: Is it possible to implement it through GOT, just like the external data reference in shared object? The executable can indirectly accesses this external code through its GOT entry,

问题 I am attempting to use Firebase to pass deep links into my app that survive install. To test this I am following the steps provided by the Firebase documentation and Firecast video here at about the 12min 40s mark. The steps are as follows: First I delete the app from my device. Then I press the link to open the app store. Then I run my app from xcode. Expected: The dynamicLink.url property will be equal to "https: //www.example.com/data/helloworld" in application:openURL Reality: The

问题 gperftools documentation says that libprofiler should be linked into a target program: $ gcc myprogram.c -lprofiler (without changing a code of the program). And then program should be run with a specific environment variable: CPUPROFILE=/tmp/profiler_output ./a.out The question is: how does libprofile have a chance to start and finish a profiler when it is merely loaded, but its functions are not called? There is no constructor function in that library (proof). All occasions of "CPUPROFILE"