mpfr

问题 I've managed to to use mpfr-mpir-gmp in CodeBlocks but I want to in eclipse C++: When I compile the code it compiles and build but if I run the project it says: "error while loading shared libraries: libmpfr.so.6: cannot open shared object file: No such file or directory". So can anyone show me how to configure eclipse to use gmp-mpifr-mpir correctly? If I compile from a terminal: g++ -lmpir -lmpfr -lgmp myEclpiseMPFRMPIRproj.cpp then : ./a.out It works fine and doesn't complain about the

问题 I've managed to to use mpfr-mpir-gmp in CodeBlocks but I want to in eclipse C++: When I compile the code it compiles and build but if I run the project it says: "error while loading shared libraries: libmpfr.so.6: cannot open shared object file: No such file or directory". So can anyone show me how to configure eclipse to use gmp-mpifr-mpir correctly? If I compile from a terminal: g++ -lmpir -lmpfr -lgmp myEclpiseMPFRMPIRproj.cpp then : ./a.out It works fine and doesn't complain about the

问题 Hello I want to create a Qt5 project using Qt-creator and want to use mpfr/gmp so I need how to configure the project. because if i compile I get these errors: #include "mainwindow.h" #include <QApplication> #include <stdio.h> #include <gmp.h> #include <mpfr.h> int main(int argc, char *argv[]) { QApplication a(argc, argv); MainWindow w; w.show(); mpfr_t x, y, z, t; mpfr_inits2 (256, x, y, z, t, (mpfr_ptr) 0); return a.exec(); } The output: error: undefined reference to `mpfr_inits2' But on

问题 I'd like to use the rug crate with wasm-bindgen to allow me to use arbitrary-precision arithmetic in a web browser. Whenever I try to compile, though, it fails to build the library, saying something along the lines of unresolved imports libc::c_char , libc::c_int , libc::c_long . Is there a workaround for this? If Emscripten is involved that's fine, but I'd like to be able to mostly write Rust code. 回答1: rug depends on libc I found https://github.com/rust-lang/libc/issues/858#issuecomment

问题 Today I updated my laptop to Ubuntu 18.04. Now I try to run a program for my bachelor thesis, but it gives me the following error message: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory I did a bit of research, and I think libmpfr4 has been droppen in this ubuntu version. Is there any way I can solve this? 回答1: I had the same problem and solved it by creating symbolic link : sudo ln -s /usr/lib/x86_64-linux-gnu/libmpfr.so.6 /usr

问题 I'm trying to get the package 'bigfloat' installed on my Mac (OS X 10.8.4), and I'm running into some issues. The package 'bigfloat' requires two other dependencies: 1) mpfr, and 2) gmp. I've installed gmp here: http://gmplib.org/ <-- This seemed to work fine. But installing mpfr is not as easy (http://www.mpfr.org/mpfr-current/mpfr.html#Installing-MPFR). They say to simply ./configure, make, and make install to get it going, but I get this error: checking for gmp.h... no configure: error:

问题 I'm using sqrt() function from math library, when I build for 64 bit using -m64 I'm getting correct result but when I build for 32 bit I have very inconsistent behaviour. For example on 64bit double dx = 0x1.fffffffffffffp+1023; sqrt(dx); // => 0x1.fffffffffffffp+511 sqrt(0x1.fffffffffffffp+1023);// => 0x1.fffffffffffffp+511 (which I believe is the correctly rounded result, verified with mpfr) But on 32 bit same input value it behaves differently. double dx = 0x1.fffffffffffffp+1023; sqrt(dx)

问题 I downloaded GCC 4.5 from http://www.netgull.com/gcc/releases/gcc-4.5.0/ but when I try to setup / build I am getting below error: Linux:>~/shared_scripts/bin/gcc/gcc-4.5.0 1040> /x/home/prakash_satya/shared_scripts/bin/gcc/gcc-4.5.0/configure CC="gcc -m64" --prefix=/x/home/prakash_satya/shared_scripts/bin/gcc/gcc-4.5.0 --with-gmp-lib=/usr/lib64 --with-mpfr-lib=/usr/lib64 --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-languages=c,c++ checking build

问题 What is the correct syntax for using printf and its cousins sprintf and fprintf to display the value of mpreal -type variables? I have tried the naive casting to double: printf ("... %g ...", (double) var); only to receive this error message from g++: error: invalid cast from type ‘mpfr::mpreal’ to type ‘double’ I had no problem using double -type variables elsewhere on the program. I heard about the type mpreal as part of this library intended to enable the use of the usual binary operators

问题 What is the correct syntax for using printf and its cousins sprintf and fprintf to display the value of mpreal -type variables? I have tried the naive casting to double: printf ("... %g ...", (double) var); only to receive this error message from g++: error: invalid cast from type ‘mpfr::mpreal’ to type ‘double’ I had no problem using double -type variables elsewhere on the program. I heard about the type mpreal as part of this library intended to enable the use of the usual binary operators