request for member in something not a structure or union (yacc parse error)

[Krishna Murthy Gudipati]

Dear Friends,

I have small problem using the %union in the parser. I am working on Solaris
8 and using lex and yacc provided as system utilities on Solaris OS.

I have defined a structure in an header file as :

        typedef struct port{

         char* portName;
         MODE  portMode;
         TYPE  portType;
         struct port* next;

        } PORT;

And this header file is included in the yacc parser. I am trying to define
the %union as follows :

%union {
 char* keyValue;
 PORT* portStmnt;
}

When i am comiling it is giving parse error in the y.tab.h header file :

###########################################

krishna-1% make

yacc -d -v -t vhdl.yacc
lex vhdl.lex
gcc -w -c -g y.tab.c
gcc -w -c -g lex.yy.c
In file included from lex.yy.c:87:
y.tab.h:8: error: parse error before "PORT"
y.tab.h:10: error: parse error before "yylval"
vhdl.lex: In function `yylex':
vhdl.lex:127: error: request for member `keyValue' in something not a
structure or union
vhdl.lex:128: error: request for member `keyValue' in something not a
structure or union
vhdl.lex:129: error: request for member `keyValue' in something not a
structure or union
vhdl.lex:131: error: request for member `keyValue' in something not a
structure or union
*** Error code 1
make: Fatal error: Command failed for target `lex.yy.o'
krishna-1%

#########################################

The gcc is not able to recognise the PORT structure which i have defined in
the header file. At the same time when i am declaring a variable using the
structure PORT in the section before %union in the parser then gcc has no
complaint i.e

%{

PORT* portStatement; // gcc has no problem with this

.....

%}

%union {

  char* keyValue;
  PORT* portStmnt; // gcc says parse error in the y.tab.h

}


Please help me in resolving this issue.

Thanks and Regards,
Krishna