gnu

I use a C++ library for an iOS app. With Apple LLVM 3.1 compiler configured (default), I get a lot of warnings for this C++ code, most of them saying: ... is a GNU extension The introduction of clang's user manual says: The Clang driver and language features are intentionally designed to be as compatible with the GNU GCC compiler as reasonably possible, easing migration from GCC to Clang. In most cases, code "just works". So, is it save to just look for a switch to disable this warnings (btw. how to?) or should I better get this lib rid of all GNU extensions? You can suppress the warnings

I would like to know if is Python on every G/L distribution preinstalled or not. And why is it so popular on GNU/Linux and not so much on Windows? Well python does not come on ALL GNU/Linux distros but is present on most of the popular Linux home user distributions (Ubuntu and Fedora Core for example), possibly because most of the application of Gnome desktop environment and KDE use python 2.5+ (not python 3 yet) interpreters. Since python is almost integrated onto the system/environment from the start, linux users feel easy to program in python. But this is a subjective opinion, as java is

#include <stdio.h> #include <stdlib.h> #include <search.h> #include <assert.h> char *data[] = { "alpha", "bravo", "charlie", "delta", "echo", "foxtrot", "golf", "hotel", "india", "juliet", "kilo", "lima", "mike", "november", "oscar", "papa", "quebec", "romeo", "sierra", "tango", "uniform", "victor", "whisky", "x-ray", "yankee", "zulu" }; int main(void) { ENTRY e, **ep; struct hsearch_data *htab; int i; int resultOfHcreate_r; resultOfHcreate_r=hcreate_r(30,htab); assert(resultOfHcreate_r!=0); hdestroy_r(htab); exit(EXIT_SUCCESS); } error in hcreate_r How to use this hcreate_r ? and other

对正则表达式有基本了解的读者，一定不会陌生『\d』、『[a-z]+』之类的表达式，前者匹配一个数字字符，后者匹配一个以上的小写英文字母。但是如果你用过vi、grep、awk、sed之类Linux/Unix下的工具或许会发现，这些工具虽然支持正则表达式，语法却很不一样，照通常习惯的办法写的『\d』、『[a-z]+』之类的正则表达式，往往不是无法识别就是匹配错误。而且，这些工具自身之间也存在差异，同样的结构，有时需要转义有时不需要转义。这，究竟是为什么呢？ 原因在于，Unix/Linux下的工具大多采用POSIX规范，同时，POSIX规范又可分为两种流派（flavor）。所以，首先有必要了解一下POSIX规范。 POSIX规范 常见的正则表达式记法，其实都源于Perl，实际上，正则表达式从Perl衍生出一个显赫的流派，叫做PCRE（Perl Compatible Regular Expression），『\d』、『\w』、『\s』之类的记法，就是这个流派的特征。但是在PCRE之外，正则表达式还有其它流派，比如下面要介绍的POSIX规范的正则表达式。 POSIX的全称是Portable Operating System Interface for uniX，它由一系列规范构成，定义了UNIX操作系统应当支持的功能，所以“POSIX规范的正则表达式”其实只是“关于正则表达式的POSIX规范

I am revamping an inhouse C language bison/flex-based parser, amongst others introducing proper __ attribute__ support. Since I cannot find any official BNF-style grammar which describes GNU GCC __ attribute__ idea (except the http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html document) I am extracting bits and pieces from the C++x11 standard and comments in various implementations found over the web. I have almost got it done (at least when it comes to parsing examples included in GCC's doc cited above) but one particular example has given me a headache with no hint of solution in

I am trying to Build and Install the Apache Thrift compiler and libraries I had to type this command is shown in instructions ./configure && make But I get this error: checking for gcc... no checking for cc... no checking for cl.exe... no configure: error: in `/PATH/TO/thrift-0.9.3': configure: error: no acceptable C compiler found in $PATH When I type in my command prompt gcc --version I get this gcc (GCC) 5.3.0 Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A

I am facing the following errors while trying to install the caret package in R. g++: error: /tmp/Rtmp2Tos7n/R.INSTALL2e6e30153a74/nloptr/nlopt-2.4.2/lib/libnlopt_cxx.a: No such file or directory make: *** [nloptr.so] Error 1 ERROR: compilation failed for package ‘nloptr’ * removing ‘/rmt/csfiles/pgrads/mava290/R/x86_64-suse-linux-gnu-library/3.1/nloptr’ Warning in install.packages : installation of package ‘nloptr’ had non-zero exit status ERROR: dependency ‘nloptr’ is not available for package ‘lme4’ * removing ‘/rmt/csfiles/pgrads/mava290/R/x86_64-suse-linux-gnu-library/3.1/lme4’ Warning in