如何修复缺失的ld库的-lfl编译时？ [英] How to fix a missing ld library for -lfl while compiling?

问题描述

我尝试将我的 .spl 文件转换为C文件（因为没有编译器）。我有一个示例Hello World.spl文件，我已下载莎士比亚编程语言 .tar 并提取它，但我不知道接下来要做什么。我似乎不能在任何文档中找到说明。任何人都可以帮忙？

编辑：

当我输入 make -fMakefile ，我得到以下输出：

  bison --verbose -d grammar.y 
 gcc -O2 -Wall -c grammar.tab.c 
 gcc -O2 -Wall -c makescanner.c 
 gcc makescanner.o -O2 -Wall -o makescanner 
 ./makescanner include> scanner.l 
 flex -Cem -t scanner.l> scanner.c 
 scanner.l：600：warning，规则不能匹配
 gcc -O2 -Wall -c scanner.c 
< stdout>：5823：warning：'yyunput'但未使用
 gcc -O2 -Wall -c strutils.c 
 gcc grammar.tab.o scanner.o strutils.o -O2 -Wall -lfl -o spl2c 
 ld：library not找到-lfl 
 collect2：ld退回1退出状态
 make：*** [spl2c]错误1 
  

解决方案

错误：

ld ：没有为-lfl




找到的库未找到库意味着您缺少的库是< a href =https://en.wikipedia.org/wiki/Flex_(lexical_analyser_generator） =nofollow> flex library 。

检查您是否已经安装了flex库，可以使用locate：

 找到libfl.a 
  

OSX

没有它，您可以安装install flex（如果您使用 brew ）：

  brew install flex 
  

如果仍然有问题，您可以尝试在make期间手动传递以下变量，例如：

  LDFLAGS = -  L / usr / local / Cellar / flex / * / libCPPFLAGS = -  I / usr / local / Cellar / flex / * / includemake -fMakefile
  pre> 
 
 
或：
  MAKEFLAGS = -  j8 -L / usr / local / Cellar / flex / * / lib -I / usr / local / Cellar / flex / * / includemake -fMakefile
   DYLD_FALLBACK_LIBRARY_PATH 环境来创建
 
 
。
 
 
 
通过执行 brew --env 传递。
 
 
 
注意：确保您将根据您的环境。
 
 
 
相关：
 
 
 
 
 
  Dylibs和OS X  
 
 
 
 
 
  Linux  
 
 
 
在大多数流行的Linux发行版上，您可以通过以下方式安装：
  apt-get install flex 
  
相关：
 
 
 
 
 
  RHEL上缺少libfl.a文件 
 
 
 
 
 
 
 
 
 OS X（Homebrew）
 
 
 
或者使用Homebrew安装莎士比亚：
  brew install shakespeare -v 
  
 > 
I am trying to translate my .spl file into a C file (because there is no compiler). I have an example "Hello World" .spl file, and I have downloaded the Shakespeare Programming Language .tar and extracted it, but I have no idea what to do next. I can't seem to find instructions in any documentation. Can anyone help?

Edit:

When I type make -f "Makefile", I get the following output:
bison --verbose -d grammar.y
gcc -O2 -Wall -c grammar.tab.c
gcc -O2 -Wall -c makescanner.c
gcc makescanner.o -O2 -Wall -o makescanner
./makescanner include > scanner.l
flex -Cem -t scanner.l > scanner.c
scanner.l:600: warning, rule cannot be matched
gcc -O2 -Wall -c scanner.c
<stdout>:5823: warning: ‘yyunput’ defined but not used
gcc -O2 -Wall -c strutils.c
gcc grammar.tab.o scanner.o strutils.o -O2 -Wall -lfl -o spl2c
ld: library not found for -lfl
collect2: ld returned 1 exit status
make: *** [spl2c] Error 1

解决方案
The error:

  
ld: library not found for -lfl
means that you've missing the library which is part of flex library.

To check if you've already flex library installed, you can look after it using locate:
locate libfl.a
OSX

If you don't have it, you can install install flex (if you're using brew):
brew install flex
If you still having the problems, you may try to pass the following variables manually during make, e.g.:
LDFLAGS="-L/usr/local/Cellar/flex/*/lib" CPPFLAGS="-I/usr/local/Cellar/flex/*/include" make -f "Makefile"
or:
MAKEFLAGS="-j8 -L/usr/local/Cellar/flex/*/lib -I/usr/local/Cellar/flex/*/include" make -f "Makefile"
eventually by modifying DYLD_FALLBACK_LIBRARY_PATH environment.

You can see which environment were passed by executing brew --env.

Note: Make sure that you'll change the paths according to your environment.

Related:


Dylibs and OS X 


Linux

On most popular Linux distributions, you can install it by:
apt-get install flex
Related:


libfl.a file missing on RHEL




OS X (Homebrew)

Alternatively use Homebrew to install Shakespeare:
brew install shakespeare -v
Which should detect all your dependencies.

                        
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