compilation

问题 I try (Python 2.7.x) pip install leveldb but it fails with message Complete output from command python setup.py egg_info: Don't know how to compile leveldb for Windows! Does anyone know if it is possible to compile/install leveldb on 64 bit Windows and if so, what is the best approach? 回答1: Seems to be possible with https://github.com/happynear/py-leveldb-windows py-leveldb-windows: A Visual Studio project to build leveldb python wrapper. 来源： https://stackoverflow.com/questions/45024809/how

问题 I was following Telegram's compile process at here and in the last step when compiling the app itself it gives me this error, to be brief the error's final lines are: CMakeFiles/MetaLang.dir/build.make:189: recipe for target 'MetaLang' failed make[2]: *** [MetaLang] Error 1 CMakeFiles/Makefile2:721: recipe for target 'CMakeFiles/MetaLang.dir/all' failed make[1]: *** [CMakeFiles/MetaLang.dir/all] Error 2 Makefile:83: recipe for target 'all' failed make: *** [all] Error 2 P.S. my OS is Ubuntu

问题 I'm having some trouble getting the hmmlearn package to install properly (in a virtual environment); it seems to have something to do with the underlying C code. The package installs fine with pip , but when I try to import the core class, I get an error: In [1]: import hmmlearn In [2]: from hmmlearn import hmm --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-2-8b8c029fb053> in <module>() ----> 1 from

问题 I have a Makefile from which I run the command of another Makefile if some objects file do not exist already. The rule is the following: $(OBJDIRCOMMON)/%.o: $(COMMONDIR)/%.c $(COMMONDIR)/Makefile | $(OBJDIRCOMMON) +$(MAKE) -C $(COMMONDIR) where the variables are defined as follows in the same Makefile : COMMONDIR := ../common SOURCESCOMMON := $(wildcard $(COMMONDIR)/*.c) OBJDIRCOMMON := $(COMMONDIR)/obj OBJECTSCOMMON := $(patsubst $(COMMONDIR)/%.c,$(OBJDIRCOMMON)/%.o, $(SOURCESCOMMON))

问题 I'm having some trouble getting the hmmlearn package to install properly (in a virtual environment); it seems to have something to do with the underlying C code. The package installs fine with pip , but when I try to import the core class, I get an error: In [1]: import hmmlearn In [2]: from hmmlearn import hmm --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-2-8b8c029fb053> in <module>() ----> 1 from

问题 I'm currently experimenting with golang's plugin system. A problem which I experienced in my testings is that the file size of the plugins is relativly big. The application loading the plugin will be referenced as "host". The host application itself is ~50MiB big since it is a web application and should be extended with plugin functionality. I've implemented a small plugin loader to start the plugins up. The plugins may use the already existing APIs in the application for example to access

问题 Suppose a have a fairly complex class I'm working on. Half the methods are done and tested, but I'm still devolping the other half. If I put the finished code in one cpp and the rest in another, will Visual Studio (or any other IDE for that matter) compile faster when I only change code that's in the "work-in-progress" cpp? Thanks! 回答1: It really depends. For a very large project, link time can often be considerably more expensive than the time to compile a single file. In our codebase at

问题 I need to initialize an static array in a Fortran subroutine double precision A(56136,8) like so: A(1,1)=0.999950528145 A(1,2)=0.99982470274 A(1,3)=0.999987006187 . . . A(56136,7)=0.933468163013 A(56136,8)=0.0668926686049 The latter is generated by another program. Compilation with ifort 13.0 ifort file.f -O0 takes very long (around 30 minutes). Q1: What is the reason for this and how can I avoid it? I have no handle on the main program, the subroutine is linked to third party files. The

问题 I try to use for_each from the C++ boost library. This is the code that I have. #include <iostream> #include <vector> #include <boost/fusion/algorithm/iteration/for_each.hpp> #include <boost/fusion/include/for_each.hpp> using namespace std; int main() { vector<int> vec; vec.push_back(1); vec.push_back(2); vec.push_back(3); boost::for_each( vec, [](int val){ cout << val << "\n"; } ); return 0; } This is how I compile my code: g++ -std=c++0x -I /opt/software/boost/1.50_ubuntu12.4lts_gcc4.7.2

问题 I found HTMLUnit is useful for me,but the files are too old. So I use svn co https://htmlunit.svn.sourceforge.net/svnroot/htmlunit htmlunit to check the code,But I don't know how to use them. Is there somebody can tell me how to compile them? 回答1: I see you have very little knowledge of Subversion. I could link you to lots of verbose documentation, but let's make it quick and easy: what you downloaded is the whole repository , containing lots of redundant code, majorly the three canonical