byacc %defines syntax error when compiling with make command

Question

I am trying to run Ymer tool in windows 10 platform. I have installed g++, gcc, yacc via cygwin. After configure command, When I am running make command to compile the application, it generates following error.

PS C:\ymer> make
/bin/sh ./ylwrap src/grammar.yy y.tab.c src/grammar.cc y.tab.h echo src/grammar.cc | sed -e s/cc$/hh/ -e s/cpp$/hpp/ -e s/cxx$/hxx/ -e s/c++$/h++/ -e s/c$/h/ y.output src/grammar.output -- byacc -d
    byacc: e - line 514 of "/cygdrive/c/ymer/src/grammar.yy", syntax error
    %defines
    ^
    Makefile:2467: recipe for target 'src/grammar.cc' failed
    make: *** [src/grammar.cc] Error 1

It seems the grammar.yy file causes the problem. Anyone knows how to solve this problem. BTW I am not familiar neither with yacc nor make files. I am just very new to cygwin as well.

Thank you,

Thomas Dickey Thomas Dickey · Accepted Answer · 2015-08-30T20:50:28

The %defines declaration is bison-specific (not part of standard yacc). The file grammar.yy contains some bison features which byacc implements, but this is not one of those. (From the description in the manual page, it seems that this is equivalent to the standard command-line option -d, making it less than useful).

byacc %defines syntax error when compiling with make command

1 Answers