libc

问题 I am trying to build Qt 5 on a Nitrogen6x board powered by an *i.MX6Q`. I've installed Debian/wheezy on the board and am using an Ubuntu 12.10 machine for cross-compiling. Configuring Qt works like a charm but I am stuck in the make step. This is the configure script I run: ./configure -v -opensource -confirm-license -reduce-relocations -no-pch -no-xcb -no-opengl -opengl es2 -qt-libpng -qt-zlib -qt-xkbcommon -qt-xcb -qt-pcre -qt-libjpeg -qt-sql-mysql -optimized-qmake\ -make libs -device imx6

问题 I'm trying to use sprof to profile some software (ossim) where almost all the code is in a shared library. I've generated a profiling file, but when I run sprof, I get the following error: > sprof /home/eca7215/usr/lib/libossim.so.1 libossim.so.1.profile -p > log Inconsistency detected by ld.so: dl-open.c: 612: _dl_open: Assertion `_dl_debug_initialize (0, args.nsid)->r_state == RT_CONSISTENT' failed! The instructions I was following said that I needed libc version at least 2.5-34, I have

问题 I've been looking at some of the source code for glibc, in particular the nptl code, and I've found it a little bit hard to understand since it seems to have conventions that I'm not familiar with. For example I was looking at a very small file pthread_equal.c and there are a few things that I had questions about: 22 int 23 __pthread_equal (thread1, thread2) 24 pthread_t thread1; 25 pthread_t thread2; 26 { 27 return thread1 == thread2; 28 } 29 strong_alias (__pthread_equal, pthread_equal) The

问题 I want to link libc.a and test.c but don't go well #test.c #include<stdio.h> #include <stdlib.h> int main(int argc, char *argv[]){ char *ptr; ptr = malloc(1024); free(ptr); return 0; } GCC linking libc static gcc test.c mystrcmp.c ./libc.a ldd ./a.out linux-gate.so.1 => (0xb7767000) libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0xb7737000) libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xb758e000) /lib/ld-linux.so.2 (0xb7768000) this method is site(GCC linking libc static and some other

问题 The Ubuntu equivalent would be libc6-dev , but I can't seem to find it for Solaris? How can I get types.h and related files for building packages on Solaris or Illumos? 回答1: You need the system/header package. I found this via http://pkg.oracle.com/solaris/release/en/search.shtml?token=types.h&action=Search 回答2: Assuming you use IPS 'pkg search 'types.h'' The Oracle Solaris 11 Cheat Sheet for Image Packaging System could be useful, too. 来源： https://stackoverflow.com/questions/41841143/trouble

问题 I want to write a program using the new SCHED_DEADLINE scheduling policy available since Linux 3.14. I start out with a simple program trying to use the sched_setattr function. #include <sched.h> int main(void) { // struct sched_attr attr; // attr.size = sizeof(struct sched_attr); // attr.sched_policy = SCHED_DEADLINE; sched_setattr(0, (void*)0, 0); return 0; } However when compiling I get the following error: $gcc dead.c dead.c: In function ‘main’: dead.c:8:2: warning: implicit declaration

问题 I have a libsomething.a file which is a static library with all dependencies included. I need to be able to import this in Python as it is a Python C library. According to this, it is not possible to use a static library as a CPython library. How can I take my .a file and make it a .so , keeping all static dependencies baked in? Background: I am using Crowbar to build a CPython shared library which can be called from Python in AWS Lambda. Until now, it has worked flawlessly, but as soon as I

问题 So we are currently trying to compile some Rust code that we can then link to some C code. To do this we are using Bindgen to generate an FFI, and then we will use it to call some C functions from Rust. However, we must first have the crate "libc" as a dependency in the Cargo.toml file of the project. The project we are currently working on demands that we use the crate wide !#[no_std] attribute, as we don't want the entire stdlib of Rust. We only need the core. The libc crate says we can

问题 I'm really enjoying the dotnet core possibilities, but there are certain problems on Linux platform. I was working with P/Invoke stuff. It's fine on Windows, but when I tried to call function from libc on Linux - I've got a problem: Unhandled Exception: System.DllNotFoundException: Unable to load DLL '/usr/lib/x86_64-linux-gnu/libc.so': The specified module could not be found. (Exception from HRESULT: 0x8007007E) I've tried two ways (source code http://pastebin.com/HDTnrM0a): [DllImport("/usr

问题 Say, I have code: while ((c = getopt(argc, argv, ":n:p")) != -1) { switch (c) { case 'n': syslog(LOG_NOTICE, "n: %s", optarg); break; case 'p': /* ... some code ... */ break; case ':': /* handle missing arguments to options requiring arguments */ break; /* some cases like '?', ... */ default: abort(); } } When I call my program as ./main -n -p it prints: n: -p Why does not getopt return : to indicate that argument to -n is missing but instead uses -p as parameter argument? 回答1: It is