使用UbuntuServer18.04.4LTS使用无头Raspberry PI 4。我正在尝试配置源代码内核。我已经安装了libncurses-dev、内核-包、qt4-dev-tools。
当我在目录/linux-5.7中运行‘menuconfig’时,它显示:
LEX scripts/kconfig/lexer.lex.c
/bin/sh: 1: flex: not found
scripts/Makefile.host:9: recipe for target 'scripts/kconfig/lexer.lex.c' failed
make[1]: ***
下面是给我带来麻烦的代码:
Relation* Relation::relation_union(Relation* r) {
std::set<Tuple*>::iterator it1;
for (it1 = tuples.begin(); it1 != tuples.end(); it1++) {
r->tuples.insert(*it1); //this is where i insert into the set
我目前正在收到错误消息:
In file included from /usr/include/errno.h:35:0,
from lex.yy.c:21:
/usr/include/x86_64-linux-gnu/bits/errno.h:50:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘extern’
extern int *__errno_location (void) __THROW __attribute__ ((__const__));
^
(与许多其
在我的编译器类中,我们正在编写Flex/Lex代码。当我编译.l文件并试图用gcc编译结果lex.yy.c文件时,我得到了以下错误:
Undefined symbols for architecture arm64:
"_yywrap", referenced from:
_yylex in lex-fb85c9.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocatio
我得到以下运行时错误消息
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::wave::cpplexer::lexing_exception> >'
what(): boost::wave::lexing_exception
当我试图运行以下代码时:
#include <vector>
#include <alg
我试图在我的Raspberry 4上为Ubuntu20.04 aarch64构建一个新的内核。
按照来自Ubuntu的BuildYourOwnKernel中的说明,我在sudo LANG=C fakeroot debian/rules editconfigs步骤中得到如下信息:
dh_testdir;
/bin/bash -e debian/scripts/misc/kernelconfig editconfigs
Do you want to edit config: armhf/config.flavour.raspi? [Y/n] n
make[1]: Entering director
我通过安装OcamlWinPlus及其组件Emacs来使用Ocaml。在我的源代码中,我有两个文件main.ml和lexer.mll,它们的代码如下:
main.ml:
open Format
let print data =
List.iter (fun l -> printf "%s@." (String.concat " " l)) data
let () =
match List.tl (Array.to_list Sys.argv) with
| [filename] ->
let ch = open_in f
我最近将我的Ubuntu安装从Jaunty升级到Karmic。这显然包括了GNU C编译器的更新,因为以前编译的代码不再更新。
现在,在cc 4.3.3 (Ubuntu 4.3.3-5ubuntu4)中工作正常的代码上,运行cc 4.4.1 (Ubuntu 4.4.1-4ubuntu8)会产生以下错误:
$ make
cc -c -MMD -MG -MP -MF lex.d -g -Wall -O -o lex.o lex.c
cc1: error: -MG may only be used with -M or -MM
添加-M或-MM标志会导致以下消息:
[...]
flex -o lex
我已经使用Ruby 1.9.3-p194一键安装程序在我的windows7个人电脑上安装了ruby1.93。我可以使用ruby命令来解释文件,但当我键入irb时,它会显示以下错误:
C:\Users\Acer>irb
F:/Programs/Ruby193/lib/ruby/site_ruby/1.9.1/rbreadline.rb:2111:in `expand_path': non-absolute home
(ArgumentError)
from F:/Programs/Ruby193/lib/ruby/site_ruby/1.9.1/rbreadline
按照中的指导原则在本地安装readthedocs失败。我正在尝试将其安装在Mac Pro OSX El Capitan 10.11.15上。
当我尝试访问localhosts:8000时,它返回消息A server error occurred. Please contact the administrator.
终端输出:
Performing system checks...
System check identified no issues (1 silenced).
July 21, 2016 - 15:04:28
Django version 1.8.3, using setti