5 - Yacc Error Reconnect
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Yacc Error Handling
#5 Closed Swader opened this Issue Sep 2, 2014 · 6 comments Projects None yet Labels None yacc command not found ubuntu yet Milestone No milestone Assignees No one assigned 2 participants Swader commented Sep 2, 2014 During installation, I was first told yacc command not found. This was fixed
Install Yacc Ubuntu
by installing byacc. Then, I got this after re-running make: vagrant@homestead:~/Code/libijt-fu$ make cd . && /bin/bash ./config.status config.h config.status: creating config.h config.status: config.h is unchanged make all-recursive make[1]: Entering directory `/home/vagrant/Code/libijt-fu' Making all in tools make[2]: Entering directory `/home/vagrant/Code/libijt-fu/tools' make all-am make[3]: Entering directory `/home/vagrant/Code/libijt-fu/tools' /bin/bash ../build-aux/ylwrap gen-rules-parser.y y.tab.c gen-rules-parser.c y.tab.h `echo gen-rules-parser.c | sed -e s/cc$/hh/ -e yacc command not found centos s/cpp$/hpp/ -e s/cxx$/hxx/ -e s/c++$/h++/ -e s/c$/h/` y.output gen-rules-parser.output -- yacc -d yacc: e - line 1712 of "/home/vagrant/Code/libijt-fu/tools/gen-rules-parser.y", syntax error %error-verbose ^ make[3]: *** [gen-rules-parser.c] Error 1 make[3]: Leaving directory `/home/vagrant/Code/libijt-fu/tools' make[2]: *** [all] Error 2 make[2]: Leaving directory `/home/vagrant/Code/libijt-fu/tools' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/vagrant/Code/libijt-fu' make: *** [all] Error 2 Setup: Vagrant, Ubuntu 14.04 x64. Specifically, Homestead Improved. Owner krakjoe commented Sep 2, 2014 You wanted to install bison, I think, try that .. Unfamiliar with ubuntu, another user mentioned this (and it looks like it) ... please do report back ... Swader commented Sep 2, 2014 Having replaced byacc with bison, and having installed flex which was also required, I get this: vagrant@homestead:~/Code/libijt-fu$ make make all-recursive make[1]: Entering directory `/home/vagrant/Code/libijt-fu' Making all in tools make[2]: Entering directory `/home/vagrant/Code/libijt-fu/tools' make all-am make[3]: Entering directory `/home/vagrant/Code/libijt-fu/tools' /bin/bash ../build-aux/ylwrap gen-rules-scanner.l .c gen-rules-scanner.c -- /bin/bash /home/vagrant/Code/libijt-fu/build-aux/missing flex updating lex.yygen-rules-scanner.c gcc -DHAVE_CONFIG_H -I. -I.. -I../include -I../include -I../jit -I../jit -fno-gcse -g -O2 -Wall -fno-omit-frame-pointer -MT gen-rules-scanner.o -MD -MP -MF .deps/gen-rules-scanner
topics Evaluation software Community Events Search developerWorks developerWorksTechnical topicsLinuxTechnical library Better error handling using Flex and BisonTips for building more user-friendly compilers and interpreters Although it is easy to
Flex: Command Not Found
generate programs using Flex and Bison, it is a bit harder
Debian Yacc Command Not Found
to make those programs produce user-friendly syntax and semantic error messages. This article examines the error-handling features of undefined reference to `pcap_lex' Flex and Bison, shows how to use them, and details some pitfalls. PDF (209 KB) | Share: Christian Hagen (chagen@de.ibm.com), Senior IT Architect, IBM Close [x] Christian Hagen is https://github.com/krakjoe/jitfu/issues/5 a Senior IT Architect with IBM Global Business Services, Application Services. Although he works as an IT architect, he likes to go back to the basics and do some programming. 28 July 2006 Also available inRussian Table of contents Introduction Sample source files Sample with plain error messages Extending Bison for better error messages A better input function http://www.ibm.com/developerworks/library/l-flexbison/ Bison's location mechanism Conclusion Download Resources Comments IntroductionAs UNIX® developers know, Flex and Bison are powerful tools for developing lexical and grammar parsers, in particular language compilers and interpreters. If you're unfamiliar with these utilities or the tools they implement -- Lex and Yacc, respectively -- check the Resources section in this article for links to the Flex and Bison documentation and to additional articles that introduce both programs.This article covers a somewhat more advanced topic: features and techniques for putting better error-handling capabilities into your compiler or interpreter. To illustrate these techniques, I use a sample program called ccalc, which implements an enhanced calculator based on the infix calculator from the Bison handbook. You can download ccalc and associated files from the Download section at the end of this article.The enhancements include the use of variables. In ccalc, a variable is defined through its first use in an initialization such as a = 3. If a variable is used before it is initialized, a semantic error is generated, the variable is
space….C ProgrammingGit (dist.version.control) Tips/TricksLinux Q&Answers..Python ProgrammingHomeI am..Ref -> .About Me..Tech Life Bio [On Request]My Space…Docs..[Private]Favorites..Songs..Videos..Pics…മലയാളം ബ്ലോഗ്Connect Me Engineering. YACC Whats your category ?Whats http://website-humblec.rhcloud.com/engineering/yacc/ your category ? Select Category Assembly(2) Cloud(5) openstack(1) containers.(8) Debugging/GDB(10) Device-mapper-multipath(4) docker(14) Fedora(7) Filesystems(18) glusterfs(18) git(1) Go Programming(1) Kernel(25) kubernetes(6) KVM/ Qemu(52) Lex(10) libvirt(27) linux-general(32) LVM(6) misc/general(34) openshift(6) Ovirt(39) Ovirt/RHEV(23) Programming(22) C programming(18) Python(4) Red Hat(4) shell-scripts(2) virt-tools(29) Virtualization(40) Xen(7) Yacc(2) മലയാളം ബ്ലോഗ്(5) YACC command not YACC - PARSER GENERATOR The utility yacc (Yet Another Compiler Compiler) is an LALR parser (which is essentially an LR parser with one token look-ahead) generator. It parses a stream of token, typically generated by lex, according to a user-specified context free grammar. First, a command not found file, say translate.y, containing a Yacc specification of the translator is prepared.The UNIX system command yacc translate.y transforms the file translate.y into a C program called y.tab.c using the LALR method. The program y.tab.c is a representation of an LALR parser written in C,along with other C routines that the user may have prepared. By compiling y.tab.c we obtain the desired object program a.out that performs the translation specified by the original Yacc program. If other procedures are needed, they can be compiled or loaded with y.tab.c, just as with any C program. How to execute ? Compile lex file using lex filename1.l (to generate lex.yy.c) Compile yacc file using yacc filename2.y (to generate y.tab.c) Compile c file using cc y.tab.c (to generate executable file a.out) Execute the file using ./a.out YAC