I noticed the following compile warnings. Perhaps someone is interested to know about them.
/usr/bin/flex -o'pgc.c' pgc.l gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline -Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing -g -Wno-error -I./../include -I. -I../../../../src/include -D_GNU_SOURCE -DMAJOR_VERSION=4 -DMINOR_VERSION=2 -DPATCHLEVEL=1 -c -o preproc.o preproc.c -MMD In file included from preproc.y:6606: pgc.c: In function ‘yylex’: pgc.c:1549: warning: label ‘find_rule’ defined but not used _GNU_SOURCE -c -o mac.o mac.c -MMD gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline -Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing -g -I../../../../src/include -D_GNU_SOURCE -c -o inet_net_ntop.o inet_net_ntop.c -MMD inet_net_ntop.c: In function ‘inet_cidr_ntop_ipv6’: inet_net_ntop.c:292: warning: value computed is not used ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend