-std=c99 seems to undefine PATH_MAX in this case. I don't care enough to fix it

at the moment, so this workaround works.

src/util/Makefile.am

@@ -1,9 +1,6 @@
 bin_PROGRAMS = vercmp
 
-AM_CFLAGS = \
-	-I$(top_srcdir)/lib/libalpm \
-	-I$(top_srcdir)/src/pacman \
-	$(CFLAGS)
+AM_CFLAGS = -I$(top_srcdir)/lib/libalpm
 
 vercmp_SOURCES = vercmp.c
 

src/util/vercmp.c

@@ -24,6 +24,9 @@
 #include <errno.h>
 #include <unistd.h>
 #include <limits.h>
+#ifndef PATH_MAX
+#define PATH_MAX 1024
+#endif
 #include "versioncmp.h"
 
 int main(int argc, char *argv[])