shared-libraries

问题 I'm trying to use the following library in my Android app: http://www.jjoe64.com/p/graphview-library.html I donwloaded the .jar file and added it the Java Build Path, but I got the following error: java.lang.NoClassDefFoundError: com.jjoe64.graphview.GraphView$GraphViewData[] On further investigation, I discovered that I had to use the "uses-library" tag in the AndroidManifest under "application". However, I don't know what to enter under android:name. <uses-library android:name="com.jjoe64

问题 What process/library on Android is responsible for dispatching touch events to applications? I was so focused on the hooking that I completely forgot that Android source is available. Update/Clarification: I want to have my code intercept all touch events for ALL applications in the system, do custom processing on them and forward to original receiver. Update 2: Assume a rooted device and application for private/internal use only, NOT for mass distribution Original, badly formulated question:

问题 I need to use a self-compiled version of glibc (2.18), newer than the default one on the system (2.15). I can compile&link a C++ program, but when I try to run it, I get errors about libstdc++.so.6 . (C programs seems to work just fine.) Do I need to recompile gcc against the newer glibc for this to work? Why? (Update: I figured this part out, but I have a few other questions at the bottom.) Here is a sample C++ program: #include <iostream> int main() { std::cout << "ok\n"; return 0; }

问题 I'm building a library that needs to be dynamically linked to my project. The output is a .so file, so I think I'm on the right track. I'm concerned by the way it's being linked at compile time - by specifying the location of its makefile and depending on a bunch of macros, which I've never encountered before. Can I assume that since I'm building a .so library (rather than a .a) that I'm in fact dynamically linking? Or is it possible for .so libs to be statically linked, in which case I need

问题 I have a shared library which I want to access symbols from the main program. For example: main.c #include <stdio.h> void bar(void) { puts("bar"); } extern void foo(void); int main(void) { foo(); return 0; } foo.c #include <stdio.h> extern void bar(void); void foo(void) { puts("foo"); bar(); } I compile and run like: gcc -c -fpic foo.c gcc -shared -o libfoo.so foo.o gcc -L$(pwd) -o test main.c -lfoo ./test And I get the output I expect: foo bar However, I must use dlopen() and dlsym() because

问题 I'm reading http://www.tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html and I had some questions. What is difference between version, minor and release number? What is meant by the part "version number is incremented whenever the interface changes"? The soname has the prefix lib , the name of the library, the phrase .so , followed by a period and a version number that is incremented whenever the interface changes. The real name adds to the soname a period, a minor number, another

问题 In my java class System.loadLibrary() is not able to locate the library files. I have used Gradle build to zip file in below structure: zip mypackage App.class GatewayResponse.class lib set of jars and shared libraries Lambda service is able to load my jar but not libraries. Imagine example.jar and libExample.so are part of my lib directory. From App class: I have created an object of some class in the example.jar and it works fine. when I try to load the library libExample.so using system

问题 I have problem with display floating point value using printf. I'm trying display result of some math function, but I always get 0.00. Could you help me and tell what I'm doing wrong? My GNU AS code: .text text: .ascii "Function result: %4.2f \n" .data x: .float 2.0 one: .float 1.0 result: .float 0.0 format: .ascii "%f" .global main main: push $x push $format call scanf FINIT FLDS x FMULS x #x*x FADDS one FSQRT FSUB one FSTS result xor %eax, %eax push $result push $text call printf pushl $0

问题 I saw topics and microsoft official doc (https://docs.microsoft.com/en-us/cpp/build/determining-which-exporting-method-to-use), said that after we add an exporting function to our dll, we have to rebuild the DLL (logic) AND the EXE. I don't understand why they say that, after tests it is not the case, i don't have to rebuild my exe after i add functions to my dll. My functions are exported with __declspec and there are basic C functions. They (the link) advice us to use .def file with ordinal

问题 I am trying to use C's PCRE library to then use regex for matching multiple links to USA Senator's from the webpage. So to do this I need the regex to be able to return 100 matches for me so I can then print out the web addresses to the emails. From my research, it looks like the PCRE library is going to be the way to do this but I don't know how to get multiple matches from a string. This is the regex pattern that I am going to be using Contact:\s+<a\s+(?:[^>]*?\s+)?href=(["'])(.*?)\1 Here