compilation

问题 I want to use WAL mode for the reason of performance and reliability. However my environment doesn't have mmap() function, so I can't compile SQLite with WAL (WAL needs mmap().). Although setting PRAGMA locking_mode=EXCLUSIVE allow use of WAL without mmap() (In this case, WAL-index is created on heap memory not shared file), it is not good solution for the applications that manage multiple database connections. I use SQLite with multiple database connections (for inter-thread concurrency) in

问题 I wrote a c++ project which works fine in eclipse. but when trying to compile with a makefile i get an error. when i searched for this error all solutions suggested adding main function. i do have a main function in matrixU.cpp. here is the make file: # All Targets all: matrixU # Tool invocations # Executable "matrixU" depends on the files matrixU.o and Student.o and Course.o matrixU: bin/matrixU.o bin/Student.o bin/Course.o @echo 'Building target: matrixU' @echo 'Invoking: C++ Linker' g++ -o

问题 I am compiling my project written using eclipse using the command line as follows javac file.java And then to run: java file (args here) How would I run a clean build, or compilation? Whenever I recompile, the changes are not getting affected unless I delete all the .class files and recompile. Please note that the the main file will call other classes too. Thanks 回答1: You should compile all the Java files in your application to be sure, basically. Options include: Use a full build system such

问题 When I try to run gulp watch , I'm getting this error: stream.js:74 throw er; // Unhandled stream error in pipe. ^ Error: ENOENT: no such file or directory, stat 'XXXX\public\build\css\client-18724fe72d.css' at Error (native) I tried to leave the client.scss file empty, and the error disappeared. I found out that the errors sometimes is appearing when I have these lines in my client.scss : // Pages @import 'pages/client/auth'; @import 'pages/client/normals'; @import 'pages/client/orders'; I

问题 I would like to put ggplots into a list and then later print each one in the list. That should be done with rmarkdown and knitr in RStudio. MWE (of course, in real, the list gets filled somewhere else than printed): --- title: "nice title" author: "Me" date: 12\. Januar 2016 output: pdf_document: fig_caption: yes fig_width: 7 keep_tex: yes number_sections: yes toc: yes html_document: default --- Here is my plot: ```{r, echo=F} library(ggplot2) printGGlist <- function(gglist){ for(gg in gglist

问题 I'm having some problems with Code::Blocks, and this is the output after / while compiling; 3|iostream: No such file or directory| 4|error: syntax error before "namespace"| |In function `main':| 8|error: `cout' undeclared (first use in this function)| 8|error: (Each undeclared identifier is reported only once| 8|error: for each function it appears in.)| ||=== Build finished: 5 errors, 1 warnings ===| My code is as follows; // my first program in C++ #include <iostream> using namespace std;

问题 When I compile two .c files like given below I get a really weird error. Code for compiling on terminal gcc -I. -o main.c matrix.c -lblas -lgfortran Error: /usr/bin/ld: /usr/lib/debug/usr/lib/i386-linux-gnu/crt1.o(.debug_info): relocation 0 has invalid symbol index 11 /usr/bin/ld: /usr/lib/debug/usr/lib/i386-linux-gnu/crt1.o(.debug_info): relocation 1 has invalid symbol index 12 /usr/bin/ld: /usr/lib/debug/usr/lib/i386-linux-gnu/crt1.o(.debug_info): relocation 2 has invalid symbol index 2

问题 The video about Red and Red/System shows the compilation process in which Red is compiled to Red/System. Youtube: https://youtu.be/-KqNO_sDqm4?t=27m12s I know how to compile Red code with the -c option. Is there a way to output the Red/System code that is created during the compilation process? 回答1: The README mentions --red-only, and says: "Stop just after Red-level compilation. Use higher verbose level to see compiler output. (internal debugging purpose)" According to @jck this also

问题 As I can see from JVM specification this code: void spin() { int i; for (i = 0; i < 100; i++) { ; // Loop body is empty } } should be compiled into: 0 iconst_0 1 istore_1 2 goto 8 5 iinc 1 1 8 iload_1 9 bipush 100 11 if_icmplt 5 14 return where condition check if_icmplt is after the loop body, but when I compile it myself and view with javap, I see: 0: iconst_0 1: istore_1 2: iload_1 3: bipush 100 5: if_icmpge 14 8: iinc 1, 1 11: goto 2 14: return and loop condition is before the cycle body.

问题 I am editing a CMakeLists.txt file made by someone else. I'm trying to get rid of some of the warnings generated when compiling the project. Normally I just add set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MY_FLAGS}") with whatever flags I need to add, and it works fine, but for this project, it's just not working. The warnings still appear. I tried a couple alternative methods, but nothing. What could be causing the issue? cmake_minimum_required(VERSION 3.1) project(PBS) set(CMAKE_MODULE_PATH