compilation

问题 When we use javac option: -source and -target how does the compiler "knows" the code to produce ? I mean how does any compiler knows the specification of any previous java release or I have to do some setting in order to provide it with some information about them ? 回答1: The javac program knows how to handle these arguments without you providing any extra information. Do note that there is a bit of a trap here, however: these options relate to the source syntax and the class file form and

问题 A couple of days ago I downloaded Charniak's parser from the web. This parser is used to parse natural languages. I've been trying to compile it but it is not working. When I'm in parser directory and type make this is prompted: /usr/bin/g++ -c -O Bchart.C /usr/bin/g++ -c -O BchartSm.C /usr/bin/g++ -c -O Bst.C /usr/bin/g++ -c -O FBinaryArray.C /usr/bin/g++ -c -O CntxArray.C /usr/bin/g++ -c -O ChartBase.C /usr/bin/g++ -c -O ClassRule.C /usr/bin/g++ -c -O ECArgs.C /usr/bin/g++ -c -O Edge.C /usr

问题 Quoted from Dynamic Binding C++, dynamic binding is orthogonal to dynamic linking... I was wondering how to understand the meaning of orthogonal"? Is it because compilation of source code into machine code is like going deep, and linkage of various machine codes is like going horizontal, and so they are orthogonal to each other, (static/dynamic) name binding is a concept in compilation static/dynamic linking is a concept in linkage? if in dynamic linking, any involved binding, i.e., any

问题 Currently, I make a project with scons. I compiled source codes and it is time to link them. However, I got an error that ld cannot find object files. The SConscript is located in src/kernel32, and import os, sys # Compile CPP env_gpp_options = { 'CXX' : 'x86_64-pc-linux-g++', 'CXXFLAGS' : '-std=c++11 -g -m32 -ffreestanding -fno-exceptions -fno-rtti', 'LINK' : 'x86_64-pc-linux-ld', 'LINKFLAGS' : '-melf_i386 -T scripts/elf_i386.x -nostdlib -e main -Ttext 0x10200', } env_gpp = Environment(**env

问题 I'm having a compilation issue which I'm unable to solve. I'm developing a cross platform C++ project coding on both Mac Os X 10.8 and Windows. The code compiles and run fine on Windows and on Mac Os X Leopard as well. Since Apple pushes the developers to stick to the latest platform for various reasons I'm forced to develop on Mountain Lion and I'm trying to get the project to work again. I compiled correctly all the libraries I needed (wxWidgets, etc) and I imported the project in the

问题 Is there any way that I can execute arbitrary Java code from a String like Sql.exect(String) . Is there something like Java.exect(String) . Can anyone point me to a command or simple tutorial? 回答1: You can use Janino , take a look at here; http://docs.codehaus.org/display/JANINO/Home 回答2: I'm not sure if I understood you correctly, but maybe try to dig about this Java 6 Compiler API 来源： https://stackoverflow.com/questions/24654188/compile-and-execute-arbitrary-java-string-in-android

问题 I would like to experiment with the OpenALPR SDK and have written a little test program. The problem is, I can't get it to compile properly and I'm not sure why. Here's the SDK documentation. My source file looks like: $ cat test.cpp #include <alpr.h> #include <iostream> std::string key = "MyKey"; int main (void) { alpr::Alpr openalpr("us", "/etc/openalpr/openalpr.conf", "/usr/share/openalpr/runtime_data/", key); // Make sure the library loaded before continuing. // For example, it could fail

问题 I want to chose directives templateUrl depending on some variable from its parent scope. I can't use templateUrl function, since it doesn't have a scope yet. I can $compile the template from $templateCache(note that it's already there, I'm not loading it) from inside the linking function, but I am afraid it's gonna have a negative impact on performance(let say this is a table cell directive.. and there's quite a few cells). Do I have any other, better option? 回答1: There is indeed no other way

问题 I am trying to comple mod_auth_kerb for apache on mac os x 10.5.7. I get no compilation errors, but when apache tries to load it: org.apache.httpd[95092]: httpd: Syntax error on line 160 of /private/etc/apache2/httpd.conf: Cannot load /usr/libexec/apache2/mod_auth_kerb.so into server: dlopen(/usr/libexec/apache2/mod_auth_kerb.so, 10): no suitable image found. Did find:\n\t/usr/libexec/apache2/mod_auth_kerb.so: mach-o, but wrong architecture I have tried the following in the make file:

问题 I have read that Java 6 has a compiler api which allows you to compile java files from other java code. However whenever I try to import any such class (eg javax.tools.JavaCompilerTool), I get a unable to resolve class javax.tools.JavaCompilerTool I searched in all the jar files in the jdk1.6.0_26 installation directory and found no reference to JavaCompilerTool in any jar file in the package javax.tools. My understanding is that this functionality is in the 1.6 JDK. I am running my