compilation

Compiled Haskell program to LLVM IR is missing main

由 别说谁变了你拦得住时间么 提交于 2019-12-02 07:13:15
问题 following this SO post regarding the compilation of Haskell programs to LLVM IR, I took the same Haskell program and tried to run its resulting LLVM IR code: quicksort [] = [] quicksort (p:xs) = (quicksort lesser) ++ [p] ++ (quicksort greater) where lesser = filter (< p) xs greater = filter (>= p) xs main = print(quicksort([5,2,1,0,8,3])) I first compiled it to LLVM IR with $ ghc -keep-llvm-files main.hs Then I transformed it to bitcode with: $ llvm-as main.ll However, when I tried to run it

Can't load packages any more in golang

由 一个人想着一个人 提交于 2019-12-02 07:10:30
I can't seem to figure this out. I was using my windows pc to develop and deploy on to a linux machine just fine, when all of a sudden I can't get go to compile anything any more, not even a simple hello world program. It may have been after a windows update. Everything I do comes back with this sort of error: F:\OneDrive\Projects\gows\src\zonemaster>go install can't load package: package zonemaster: cannot find package "zonemaster" in any of: C:\Go\src\zonemaster (from $GOROOT) F:\OneDrive\Projects\gows\src\zonemaster (from $GOPATH) The GOROOT and GOPATH are set correctly, as they always have

recompile after base class change

由 痞子三分冷 提交于 2019-12-02 06:43:41
问题 In particular, the way most C++ implementations work implies that a change in the size of a base class requires a recompilation of all derived classes. This statement is from stroustrup book. So if base class is in a .so file and we just change a member function implementation, then does it mean that we don't have to recompile my program linked to that shared object? 回答1: Formally, if you don't recompile you're violating the One Definition Rule, and get undefined behavior. Practically, as

Compiler is creating extra class files with $ in them

由 两盒软妹~` 提交于 2019-12-02 06:37:29
I'm using Eclipse and I've written a Java application using SWT. When Eclipse compiles my program, it renames my main file into 4 different files like this: MainFile.class MainFile$1.class MainFile$2.class MainFile$3.class When I go to run this program from command line, I get Could not find the main class: MainFile.class. Program will exit. I really don't understand why this is happening. Louis Wasserman The $ classes are for anonymous inner classes and perfectly normal. Could we see the command line you ran? You probably need to write java MainFile instead of java MainFile.class . 来源： https:

Can I add to a generic collection of type A values of type B ,which extends A, without any special syntax?

由 醉酒当歌 提交于 2019-12-02 06:29:47
问题 public class Stack<E> { public Stack () {....} public void push (E e) {....} public E pop () {....} public boolean isEmpty(){....} } public void pushAll (Collection<E> src) { for (E e: src){ push(e) } } I don't understand what will the problem if I'll write Stack<number> numberStack = new Stack<Number>(); Collection<Integer> integers=... numberStack.pushAll(integers); Integer extends Number, so I can add a collection of Integers to numberStack . But I was told that this is an error

Compiled Haskell program to LLVM IR is missing main

由 一世执手 提交于 2019-12-02 06:26:00
following this SO post regarding the compilation of Haskell programs to LLVM IR, I took the same Haskell program and tried to run its resulting LLVM IR code: quicksort [] = [] quicksort (p:xs) = (quicksort lesser) ++ [p] ++ (quicksort greater) where lesser = filter (< p) xs greater = filter (>= p) xs main = print(quicksort([5,2,1,0,8,3])) I first compiled it to LLVM IR with $ ghc -keep-llvm-files main.hs Then I transformed it to bitcode with: $ llvm-as main.ll However, when I tried to run it with lli I get the following error regarding a missing main: $ lli main.bc 'main' function not found in

QT versions, kits and compilers

由 ￡可爱￡侵袭症＋ 提交于 2019-12-02 05:37:39
问题 I am new in QT and was wondering what is the difference between QT versions, kits and compilers. In my "Build & Run" tab are avilable: Kits: Desktop Qt 5.4.2 MSVC2013 64bit2 Desktop Qt 5.5.0 MSVC2013 64bit Qt Versions: Qt 5.4.2 MSVC2013 64bit2 and some qmake.exe path Qt 5.5.0 MSVC2013 64bit and some qmake.exe path Compilers: Microsoft Visual C++ Compiler 12.0(x86) Microsoft Visual C++ Compiler 12.0(amd64) Microsoft Visual C++ Compiler 12.0(x86_amd64) Microsoft Visual C++ Compiler 12.0(x86_arm

Missing sqlite3 after Python3 compile

由 跟風遠走 提交于 2019-12-02 05:17:19
问题 My question is much like several others. Having manually compiled Python, sqlite3 is missing: The main difference is that I'm using a Debian Linux system (unlike in this question: OS X 10.8.2 python 3 import sqlite error), and Python3 (unlike in this and a bunch of other questions: Cannot import SQLite with Python 2.6). I was hoping for some guidance on which direction to troubleshoot in. According to some of the Linux-but-older-Python questions, an error like the one I'm getting could be

Getting GLEW to compile in Code::Blocks

由 十年热恋 提交于 2019-12-02 05:08:33
问题 I'm wanting to get into and learn OpenGL in C++ and am using Code::Blocks. I was able to get freeglut to work, along with several online examples (as well as the example that ships with CB). However, when I try to include GLEW for some tutorials I'm following, I get the following compiler errors: obj\Debug\main.o||In function `RenderSceneCB':| C:\C Programs\OpenGL Test\main.cpp|12|undefined reference to `_imp____glewEnableVertexAttribArray'| C:\C Programs\OpenGL Test\main.cpp|13|undefined

Can I conditionally compile my Rust program for a Windows subsystem?

由 北城以北 提交于 2019-12-02 04:33:52
问题 I have a Rust program that I want to compile for the "windows" subsystem when I'm building it for distribution. Currently I am using this in my main.rs: #![feature(windows_subsystem)] #![windows_subsystem = "windows"] This works, but when I run the tests on a Windows machine, the Windows subsystem does not have access to the console so I cannot see the output. I need to comment out the above lines of code in order to see the result of my tests. Is there a way to conditionally compile which
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