compilation

问题 I know that there's support for AOT in Xamarin for Android. After the software became free, all of its features became free as well. I read around the documentation and I enabled AOT by modifying my project.csproj file, as follows: <AotAssemblies>True</AotAssemblies> After making sure that my project path doesn't contain spaces (breaks process), I ran a build and I got an APK with both managed .NET DLLs and native compiled libs. Sadly, the app seems to be using the .NET DLLs and completely

问题 I've always programmed alone, I'm still a student so I never programmed with anyone else, I haven't even used a version control system before. I'm working on a project now that requires knowledge of how programmers work together on a piece of software in a company. How is the software compiled? Is it from the version control system? Is it by individual programmers? Is it periodic? Is it when someone decides to build or something? Are there any tests that are done to make sure it "works"?

问题 I'm writing a couple of classes for an exercise on copy control members in the C++ primer book. I put the classes definitions in their respective header files,and implementation in code files. I seem to have done all things like they should be done, but I get an error at link time I can't understand (and I already spent half an hour thinking about it) here's the message class (headers and code files) message.h #include <string> #include "folder.h" class message { friend void swap(message&

问题 I'm writing a couple of classes for an exercise on copy control members in the C++ primer book. I put the classes definitions in their respective header files,and implementation in code files. I seem to have done all things like they should be done, but I get an error at link time I can't understand (and I already spent half an hour thinking about it) here's the message class (headers and code files) message.h #include <string> #include "folder.h" class message { friend void swap(message&

问题 first of all I've read this topic but I can't compile my code. Compiling Fortran netCDF programs on Ubuntu I am on UBUNTU 14.04 and compiling a fortran program that uses NetCDF. I have compilation error like this: terrain.f:(.text+0x17efd): undefined reference to 'ncopn_' terrain.f:(.text+0x18111): undefined reference to 'ncopn_' terrain.f:(.text+0x187cc): undefined reference to 'ncclos_' terrain.f:(.text+0x187ea): undefined reference to 'ncclos_' Definitely it says I have not netcdf fortran

问题 I see people using -msse -msse2 -mfpmath=sse flags by default hoping that this will improve performance. I know that SSE gets engaged when special vector types are used in the C code. But do these flags make any difference for regular C code? Does compiler use SSE to optimize regular C code? 回答1: Yes, modern compilers auto-vectorize with SSE2 if you compile with full optimization. clang enables it even at -O2, gcc at -O3. Even at -O1 or -Os, compilers will use SIMD load/store instructions to

问题 I have different "*.asm" files that need to be included in the "main.asm" file. The problem I'm facing is that: In many files I have declared labels like "loop", "forLoop", "whileTag" etc... in the same way ( i.e. with the same name ) And when I try to %include "file1.asm" and %include "file2.asm" it gives me a compilation error. It says that I can't declare the same label twice ( i.e. file1.asm and file2.asm, both have "loopHere" label declared ). How do I solve this ? Thanks The problem

问题 I have different "*.asm" files that need to be included in the "main.asm" file. The problem I'm facing is that: In many files I have declared labels like "loop", "forLoop", "whileTag" etc... in the same way ( i.e. with the same name ) And when I try to %include "file1.asm" and %include "file2.asm" it gives me a compilation error. It says that I can't declare the same label twice ( i.e. file1.asm and file2.asm, both have "loopHere" label declared ). How do I solve this ? Thanks The problem

问题 Trying to import Imputer from sklearn, import pandas as pd dataset = pd.read_csv('Data.csv') X = dataset.iloc[:, :-1].values y = dataset.iloc[:, 3].values #PART WHERE ERROR OCCURS:- from sklearn.preprocessing import Imputer Shows "ImportError: cannot import name 'Imputer' from 'sklearn.preprocessing' (/home/codeknight13/anaconda3/lib/python3.7/site-packages/sklearn/preprocessing/__init__.py)" 回答1: The class is deprecated, use from sklearn.impute import SimpleImputer imputer = SimpleImputer

问题 I'm doing this in a makefile and it results on the first run creating the .gcda files in that dir; but as soon as i do the second, if find that the executable is almost as slow (and this is surely related), is still writing new files to the dir after compiled. From my understanding this shouldn't occur. Removing -fprofile-arcs (or -lgcov for that matter) makes the second compile complain about missing symbols. What amd i missing? I make clean in between both of these executions btw. I also