When building on an old environment, the flex generated
tc/emp_ematch.lex.c file would not compile. The error given was:
emp_ematch.lex.c:1686: error: expected â;â, â,â or â)â before numeric constant
The emp_ematch.l uses 'str' as a start symbol name, and flex would create
a '#define str 1' statement. This particular version of flex,
unfortunately, used 'str' as names of string variables in the generated
parser functions. This is line 1686 in the generated file:
YY_BUFFER_STATE ematch__scan_string (yyconst char * str )
This patch just substitutes 'str' for 'lexstr' in emp_ematch.l to avoid
the collision.