I'm running the latest version of cygwin on Windows XP. Bison 1.75 appears to be broken
bison -y -d grammar.y ...generates absolutely nothing and appears to fail silently. bison -v -y -d grammar.y ...generates a y.output file only... and it looks just fine. So I returned to Bison 1.35 and my command... bison -v -y -d grammar.y ...generates exactly what I expect, y.tab.c, y.tab.h and y.output No clue as to what is wrong as there are no messages, no core dumps, and nothing in the y.output to indicate a failure. -- J. Lambert