My OS is centos 5.5, which has APR 1.2.7 pre-installed on it. # rpm -qa | grep apr
apr-1.2.7-11.el5_3.1 apr-util-1.2.7-11.el5 I am using Tomcat version 6.0.20 and I located tomcat-native.tar.gz under tomcat/bin folder. I extracted the contents and now I am in tomcat/bin/tomcat-native-1.1.16-src/jni/native directory. I have the "configure" script here. ./configure fails Error: configure: error: APR could not be located. Please use the --with-apr option. Not sure why I get above error since I have the "apr" RPM installed (version 1.2.7). I double check for these shared libraries under /usr/lib and they are all there ls /usr/lib/libapr* /usr/lib/libapr-1.so.0 /usr/lib/libapr-1.so.0.2.7 /usr/lib/libaprutil-1.so.0 /usr/lib/libaprutil-1.so.0.2.7 I tried ./configure --with-apr=/usr/lib , but that fails too Error: checking for APR... configure: error: the --with-apr parameter is incorrect. It must specify an install prefix, a build directory, or an apr-config file. So I downloaded APR version 1.4.2 and compiled and installed it with a different prefix=/tmp/myapr Now ./configure --with-apr=/tmp/myapr works fine and I see following line when I start tomcat Loaded APR based Apache Tomcat Native library 1.1.16. APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true]. But I have couple of questions: 1) Is it ok to compile JNI wrapper with APR 1.4.2, but run it with APR 1.2.7 (like I explained above)? 2) Is it ok to use ARP 1.2.7? Or is it strongly recommended to use the latest version, i.e. APR 1.4.2? -Ajay