With libz installed as shared library only, ie.
libz.so.1.1.3 exists, but libz.a does not, the configure
script incorrectly infers, that
ac_cv_header_stdc=no

Next, compilation of lib/rpmmalloc.c fails, as it needs the
definition of EXIT_FAILURE.

gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../build -I../popt
-I/usr/local/include -I../intl -I../misc -g -O2
-D__BIT_TYPES_DEFINED__ -Wall -Wpointer-arith
-Wstrict-prototypes -Wmissing-prototypes
-Wno-char-subscripts -c rpmmalloc.c -o rpmmalloc.o
rpmmalloc.c: In function `vmefail':
rpmmalloc.c:6: `EXIT_FAILURE' undeclared (first use in this
function)
rpmmalloc.c:6: (Each undeclared identifier is reported only
once
rpmmalloc.c:6: for each function it appears in.)