You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.3 KiB
38 lines
1.3 KiB
2 years ago
|
Notes on usage of LEX and YACC to generate VTK parse files
|
||
|
|
----------------------------------------------------------
|
||
|
|
|
||
|
|
LEX:
|
||
|
|
----
|
||
|
|
1. vtkParse.l is edited as necessary
|
||
|
|
2. LEX is run (should be flex. Last tested on flex version 2.5.4 on Cygwin,
|
||
|
|
but it should work on Linux or on anything that uses flex)
|
||
|
|
3. LEX spits out lex.yy.c
|
||
|
|
4. Remove line:
|
||
|
|
#include <unistd.h>
|
||
|
|
Suggested method is to run:
|
||
|
|
|
||
|
|
perl -ne "s/\t/ /g; next if /unistd/; print" lex.yy.c > lex.yy.c.new
|
||
|
|
mv lex.yy.c.new lex.yy.c
|
||
|
|
|
||
|
|
This removes the line and replaces tabs with spaces.
|
||
|
|
|
||
|
|
YACC:
|
||
|
|
-----
|
||
|
|
1. vtkParse.y is edited as necessary
|
||
|
|
2. yacc is run: "yacc -b vtkParse vtkParse.y" and spits out vtkParse.tab.c
|
||
|
|
(Note: yacc was run RedHat Linux 5.2 1/14/00 by W. Schroeder)
|
||
|
|
3. Build vtkHTML.exe, vtkWrapTcl.exe, vtkParseJava.exe,vtkWrapJava.exe,
|
||
|
|
vtkWrapPython.exe on the PC and check them in.
|
||
|
|
4. Check in vtkParse.l, lex.yy.c, vtkParse.y, vtkParse.tab.c
|
||
|
|
|
||
|
|
|
||
|
|
Important Note on YACC:
|
||
|
|
-----------------------
|
||
|
|
|
||
|
|
Do not use GNU Bison on vtkParse.y. New versions won't even parse
|
||
|
|
the file and old ones will create compile problems on various
|
||
|
|
platforms. Use a recent byacc instead. Byacc is the Berkeley LALR
|
||
|
|
parser generator. Red Hat Linux apparently installs byacc by
|
||
|
|
default.
|
||
|
|
|