+if printf 'int main(){return 0;}' | gcc -x c -lz -o /dev/null - > /dev/null 2>&1; then
+ echo "Checking for zlib development files... Yes."
+ have_zlib=1
+else
+ echo "Checking for zlib development files... No."
+ have_zlib=0
+ errors=$((errors + 1))
+fi
+
+if pkg-config --modversion valgrind > /dev/null 2>&1; then
+ echo "Checking for valgrind development files... Yes."
+ have_valgrind=-DHAVE_VALGRIND
+else
+ echo "Checking for valgrind development files... No."
+ have_valgrind=
+fi
+