configure.ac should fail if there is no yacc

[Ralf Hemmecke]

Sorry, but I'm on a very minimalistic debian wheezy...
Shouldn't already ./configure fail when missing yacc?

Ralf

./autogen.sh # worked after I've added AC_PROG_RANLIB
./configure # ran through without problem
make # gave the following...

make[3]: Leaving directory `/root/aldor/aldor/aldor/subcmd/unitools'
Making all in testaldor
make[3]: Entering directory `/root/aldor/aldor/aldor/subcmd/testaldor'
CC testaldor-testaldor.o
CCLD testaldor
make[3]: Leaving directory `/root/aldor/aldor/aldor/subcmd/testaldor'
make[3]: Entering directory `/root/aldor/aldor/aldor/subcmd'
make[3]: Nothing to be done for `all-am'.
make[3]: Leaving directory `/root/aldor/aldor/aldor/subcmd'
make[2]: Leaving directory `/root/aldor/aldor/aldor/subcmd'
Making all in tools
make[2]: Entering directory `/root/aldor/aldor/aldor/tools'
Making all in unix
make[3]: Entering directory `/root/aldor/aldor/aldor/tools/unix'
YACC zaccgram.c
../../../amaux/ylwrap: line 112: yacc: command not found
make[3]: *** [zaccgram.c] Error 1
make[3]: Leaving directory `/root/aldor/aldor/aldor/tools/unix'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/root/aldor/aldor/aldor/tools'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/aldor/aldor/aldor'
make: *** [all-recursive] Error 1