I need to implement some of the functions from the libsodium library in my C code, which is compiled in visual studio. I downloaded all the libsodium precompiled binaries files that I need and put them in the right folders. In order to link to libsodium I tried to follow the instructions here https://download.libsodium.org/libsodium/content/usage/ , and yet the compiler does not recognize the commands from libsodium library. I have no experience with linking libraries in C. Should I add something in the compiler options or the linker options? how do I do it in visual studio? Also, in the link above, it is mentioned that I have to add two extra definitions of SODIUM_STATIC = 1 and SODIUM_EXPORT = (Here, they do not mention a number). Where exactly should I define these values?
I don't think you have installed the sodium library. Follow the instructions here. You probably want to skip down to the section about installing pre-built libraries. If you're on Debian or Ubuntu it would be as easy as running apt-get install libsodium13 as root.
Related
I am using the MinGW-w64 installer found here:
https://mingw-w64.org/doku.php/download/mingw-builds
Installing to a directory creates a folder called mingw32 or mingw64 that contains the compiler. I already know that the additional batch script, HTML link, and uninstall executable in the same directory can be deleted.
The mingw32/64 folder contains these folders:
bin
etc
include
lib
libexec
licenses
opt
share
i686-w64-mingw32 (mingw32) or x86_64-w64-mingw32 (mingw64)
I only wish to compile with C and nothing else. So what files can I delete in order to reduce the file count because the compiler contains files for Ruby, Fortran and other languages which as I stated, I don't need it.
Why are people still using Mingw or Mingw64 instead of TDM-GCC ? You have to rely on the default builds or build it yourself from source. Trying to install it on your own terms sucks.
TDM-GCC on the other hand, you can specify where and which components to install as you wish. You can upgrade or remove it without any worries. It's more fast, easy,modern and equivelant these days.
Now for your question, you can download and install TDM-GCC by it's installer. I don't really think you need any further instructions as a 5 year old would understand how to use it. Just select only the components required for c.
If you don't understand,I would gladly help you more if needed. ^_^
If you want a smaller GCC toolset, try MinGW Distro.
Scroll down to "How To Build Your Own Distro", download components-14.1.7z, extract it, extract binutils 2.27 and GCC 6.3.0 inside the same folder. The total size is about 270MB.
as far as i know the minimum are yours
1, bin
5. libexec
not all tools in bin you may need but generally i would hold both of those dirs
you also ned libraries and headers if you want to build abainst standard c library and windows.h, so
include
lib
is also needed (hovever part of it may contain also headers and libraries for c++ standard library) all those main 3 libs are kinda mixed there afaik so it might be a bit hard to find what comes for what
I am new to C programming.
I was trying to use the pthread API to write some concurrent program.
I downloaded eclipse IDE for C/C++ Developers, MinGW. I have put all the library, header files into the corresponding location of the MinGW file.
When I tried to build the project, there is always an error "cannot find -lpthread", what happened?
I have added the "-pthread" to the GCC compiler.
I have searched a lot in Google but seems no one have similar problem as me.
The answer to this question by someone who is also missing MinGW pthread library should help you out! Essentially the issue is that the MinGW installer script might not download the lpthread library upon installation. Quoted from link:
Just run and open MinGW Installation Manager, which should be pre-installed with MinGW, select "All Packages" on the left panel, and on the right panel, search for "mingw32-pthreads-w32" packages and install them.
I downloaded eclipse IDE for C/C++ Developers, MinGW.
MingGW uses the Windows API. The Windows API does not provide PThreads.
You need to install PThreads for Win32 to have PThreads available under Windows, and with this available under MinGW.
Eclipse is not configured to put the -pthread argument in the gcc compilation. To solve this, go to the Menu:
view sourceprint?
1.Project -> Properties
From the bar on the left:
view sourceprint?
1.c/c++ build -> GCC C Compiler -> Miscellaneous
Add the “-pthread” argument into the beginning of the “Other Flags” Also go to:
view sourceprint?
1.c/c++ build -> Settings -> GCC C Linker -> Libraries
And include the “pthread”library into the other libraries. Click Apply and rebuild the project. Pthreads must work now.
See the question on mingw.org. I ended up with adding 'C:/cygwin/lib' to the settings for the "Library search path (-L)" at properties >> c/c++ build >> settings >> MinGW C Linker >> Libraries.
I have to use LU decompostion to fit a simple model to some data (simulated) in C. An example of what I need to do is here:
However, I'm stuck with a more basic problem: how do I install packages in C and call them in my code?
I'm new in C and I'm used to R. But I have this assingment to do some tests about Matrix inversion, LU decomposision and the professor suggested using Lapack to easy things (thus, I don't need to code myself the LU decomposition etc.). But I don't know how to install the package and call it in my code, in order to use the functions of LAPACK.
I have a windows 7 64 bits and I'm using compiler Code Blocks 8.02
Thanks for any help.
Normally you don't "install" C libraries in that sense. Normally, in Windows you have three types of files. The header files, typically ending in .h, the dynamic library, .dll, and most likely some linker files (typically, .lib, .a or something). The linker and compiler will need to be able to find these files somewhere. Normally you set the include directory paths, and library directory paths.
E.g. Let's say you downloaded a library called foo, and you extract it to C:\foo.
In that folder, libfoo.a, foo.dll and foo.h reside. In Code::Blocks you will have to point include directory path to C:\foo and library path to C:\foo so that the linker and compiler know where to look for these files. Since you're linking against the foo library, you will also have to set -lfoo or something similiar in linker command line. This is GCC syntax, but I think Code::Blocks uses GCC compiler behind the scenes anyways.
In the C code you can just #include <foo.h> and the compiler will find it for you.
You need to install that library and it might actually supply a tool for that. Check their documentation (e.g. a file INSTALL or README in their distributed sources). If the library uses only headers you might only need to copy it's headers to some directory on your system, but their buildsystem might be able to do that for you.
Once that is done you would tell your IDE on where to look for the sources and if the library uses not just headers to link against the actual library file. See the documentation in the Code::Blocks Wiki on how this is done for some example cases and adapt for your library.
The simplest thing to do in your situation is to install Cygwin. You can use the setup.exe installer to install the GCC and the LAPACK libraries. When you want to use the LAPACK library, you will add the -llapack option to your GCC command line.
I want to build a static library (*.LIB file) GNU libiconv on windows to be used with other libraries in Visual C++. Other libraries I'm using are built with "MultiThreaded DLL" (/MD) Runtime option. So, I need to build libiconv with the same option.
Problem is the libiconv uses GNU build system and I want to compile with /MD option. You can see the source structure of libiconv here:
http://cvs.savannah.gnu.org/viewvc/libiconv/?root=libiconv
Mr. Zlatkovic maintains the windows port of GNU libiconv for libxml2
you can see them here:
ftp://xmlsoft.org/libxml2/win32/iconv-1.9.2.win32.zip
I cannot use his port. I need to build from the latest version of libiconv-1.13. I wonder how this guy has ported it? Can some one please tell me how to build *.lib from this and compile it using MSVC?
EDIT:
Actually, I need to build few more gnu libraries with same settings. So, if I get solution for one library. I can do the same for all others.
I found PARK Youngho's How to Build libiconv with Microsoft Visual Studio over at The Code Project to be complete and clean (for VS2010 and GNU libiconv 1.14).
A little addition to your answer.
I had the same issue and found that the MinGW + MSYS solution was perfect.
Though, I needed to go a little further and generate also the .lib file in order to be able to link with the resulting dll.
This is what I found:
generate a .def file from the dll with dumpbin (a Visual Studio tool).
generate the .lib file from the .def with the lib program (Visual Studio tool too)
This allows you to specify some link flags if appropriate.
Everything detailed here (I'm not the author of this method):
http://wiki.videolan.org/GenerateLibFromDll
I also realized that this lib/dll couple can be linked with both MD and MDd libraries.
Hope that can help people that find this post, like it helped me.
-David
I'm the OP. MSYS is the exact thing what I was looking for.
Just install MinGW & MSYS which contains shell sh.exe & make.exewith which you can configure and generate a Makefile after that you can use make.exe to run it.
Its as simple as that.
compile them using MinGW using Msys for the environment if needed. MinGW's .a files are apparently, according to the mailing list, the same format as .lib files (just do a rename). You might want to check first to see if the iconv static library is included already in the MinGW download / filesystem.
Edit: it's in msys (C:\msys\1.0\lib), along with:
libiconv.a
libiconv.dll.a
libiconv.la
and additionally
libiconv-2.dll (in C:\msys\1.0\local\bin)
Edit: is it in here, the libiconv you need? these versions seem to have MSVC makefiles :) http://www.opensource.apple.com/source/libiconv/
I haven't done C in a long time. I'd like to compile this program, but I have no idea how to proceed. It seems like the makefile refers to GCC a lot and I've never used GCC.
I just want an executable that will run on windows.
You may need to install either cygwin or mingw, which are UNIX-like environments for Windows.
http://www.mingw.org/
http://www.cygwin.com/
When downloading/installing either cygwin or mingw, you will have the option of downloading and installing some optional features; you will need the following:
gcc (try version 2.x first, not 3.x)
binutils
GNU make (or gmake)
If it requires gcc and you want it to run on Windows, you could download Cygwin.
That's basically an emulator for GNU/Linux type stuff for Windows. It works with an emulation DLL.
http://www.cygwin.com/
In order to compile this program you need a C compiler. It does not have to be gcc, although you are already given a makefile set up to use gcc. The simplest thing for you to do would be the following:
Install cygwin
Open the cygwin command prompt
go into the directory where you have your makefile
type 'make'
That should compile your program
If you are not comfortable with using command line tools then you can download the free version of MS Visual Studio and import the source files into a new Visual Studio project. This way you would not need to install cygwin and use gcc, but you would need to know how to create projects and run programs in Visual Studio.
You almost certainly don't need all of cygwin to compile using gcc. There are plenty of standalone gcc clones for Windows, like gcw.
If it's reasonably portable C code (I haven't looked at it), then you may be able to just ignore the included Makefile and feed the source into whatever compiler you do want to use. What happens when you try that?
Dev-C++ provides a simple but nice IDE which uses the Mingw gcc compiler and provides Makefile support. Here are the steps I used to build the above code using Dev-C++ (i.e. this is a "how-to")
After downloading the source zip from NIST, I
downloaded and installed the Dev-C++ 5 beta 9 release
created a new empty project
added all the .c files from sts-2.0\src
Then under Project Options
added -lm in the Linker column under Parameters
added sts-2.0\include to the Include Directories in Directories
set the Executable and Object directories to the obj directory under the Build Options
and then hit OK to close the dialog. Go to Execute > Compile and let it whirl. A minute later, you can find the executable in the sts-2.0\obj directory.
First, there is little chance that a program with only makefiles will build with visual studio, if only because visual studio is not a good C compiler from a standard POV (the math functions in particular are very poorly supported on MS compilers). It may be possible, but it won't be easy, specially if you are not familiar with C. You should really stick to the makefiles instead of trying to import the code in your own IDE - this kind of scienfitic code is clearly meant to be compiled from the command line. It is a test suite, so trying things randomly is NOT a good idea.
You should use mingw + msys to install it: mingw will give you the compilers (gcc, etc...) and msys the shell for the make file to run correctly. Contrary to one other poster, I would advise you against using gcc 2 - I don't see any point in that. I routinely use gcc 3 (and even 4) on windows to build scientific code, it works well when the code is unix-like (which is the standard platform for this kind of code).