compilation

问题 I'm attempting to follow the steps on http://llvm.org/docs/tutorial/LangImpl3.html to build the example. based on Building llvm examples #error "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h" Why am I getting "undefined reference to `dladdr'" even with -ldl for this simple program? I've ended up with the command clang++ -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -std=c++11 -g -O3 toy.cpp `llvm-config --libs core --cppflags --ldflags` -o toy which is giving /usr

问题 I want to compile example (make_torrent) from libtorrent official website: g++ create_torrent_file.cpp -o run -lboost_filesystem-mt But I get this error: create_torrent_file.cpp:(.text+0x158): undefined reference to `libtorrent::file_storage::file_storage()' I have libtorrent-rasterbar installed ldconfig -v | grep libtorrent: libtorrent-rasterbar.so.6 -> libtorrent-rasterbar.so.6.0.0 So how should I compile this source code? 回答1: You need to add libtorrent-rasterbar to the linker. Try the

问题 This has been bothering me for days now, ever since a week ago I launched to Heroku for probably the 30th time and all of a sudden I get this error I DONT USE Sass!! It isnt in my gemfile or anywhere else! It works perfectly in localhost and all of the answers i've found online just dont work! This is my application.css /* * This is a manifest file that'll be compiled into application.css, which will include all the files * listed below. * * Any CSS and SCSS file within this directory, lib

问题 Ever since I've upgraded from 32-bit Office 2010 to 64-bit Office, some of my macro's have been behaving troublesome. I get various weird errors that do not appear on my 32-bit computer and I'm trying to figure out why. The following code is used to send a range in Excel as PDF to various recipients. How it works: the macro works itself through a list of names, with each name giving different figures in the selected Excel range. Subsequently for each name the PDF is made and send

问题 Suppose one has an entity which has two architectures defined. Those two architectures work with the same entity (obviously) and subsequently the two set the output pins to different values. My question is, how does the program (simulator) determine what the output should be (i.e. which architecture to choose)? Here is an example: library ieee; use ieee.std_logic_1164.all; entity Exercise_4 is generic (n : integer := 4); port( a, b : std_logic_vector (n-1 downto 0); clk, rst : std_logic; q,

问题 I am trying to compile Iozone (located here) into an executable that is suitable to be used on an Android device. I have followed these directions using Android Studio. However when the build enters the externalNativeBuildDebug it fails with this error: org.gradle.internal.UncheckedException: Build command failed. Error while executing process /home/mbosnjak/ndk-bundle/ndk-build with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=/home/mbosnjak/AndroidStudioProjects/CommandLine/app/src

问题 From the docs: CPATH specifies a list of directories to be searched as if specified with -I, but after any paths given with -I options on the command line. This environment variable is used regardless of which language is being preprocessed. On my machine, I'd like to e.g. cross-compile or, otherwise have an versioned set of alternative includes. I'd like to use those to compile other people's code. Concretely, I have several different versions of python, and their related Python.h files. $

问题 When I try to compile my C program with cc I get a warning that I have an implicit function declaration isspace. Isn't this part of the standard C library? Which import do I need to do so my function runs properly? Thanks a lot for your help! Cheers 回答1: You need #include <ctype.h> . However make sure you read the documentation carefully. Its interface is unintuitive, for historical reasons. It's designed to work only on a value from 0 to UCHAR_MAX (usually 255) -- the same sort of value that

问题 I created multiple packages and want to compile and run them. I fiddled around with javac and java and learned about how packages should be named and how a project should be structured. I hope I got all right. But I fail at compilation and running the stuff. I know I could use an IDE for this, but I want to try it with the command-line tools just for curiousity. Here is how my project is organized: Project + src + net + chris + dojo - Program.java + datastructures - Queue.java - LinkedList

问题 I know that when we create multiple objects of a given class type, multiple copies of the member variables are created. Each object has it's separate set of member variables. Does this work the same way with member functions too? If my class has a lot of functions, do the member functions get duplicated for each object that is created? Does each created object have it's own set of the member functions? class demo { public: int height; int width; void setheight(int height) { this->height =