mjhjmtu

I have built and installed boost using the following steps:

# Boostrap and install
JOBS=`grep -c ^processor /proc/cpuinfo`
wget https://dl.bintray.com/boostorg/release/1.67.0/source/boost_1_67_0.tar.bz2
tar xf boost_1_67_0.tar.bz2
cd boost_1_63_0
./bootstrap.sh
./b2 -d1 -j$JOBS --with-thread --with-filesystem --with-python --with-regex -sHAVE_ICU=1 --with-program_options --with-system link=shared release toolset=gcc stage
./b2 -d1 -j$JOBS --with-thread --with-filesystem --with-python --with-regex -sHAVE_ICU=1 --with-program_options --with-system link=shared release toolset=gcc install
sudo bash -c "echo '/usr/local/lib' > /etc/ld.so.conf.d/boost.conf"
sudo ldconfig

Then, I try to build mapnik which uses boost. I checkout mapnik and run ./bootstrap.sh and ./configure. I get the error "Could not find required header or shared library for boost filesystem". The boost section of configure is as follows:

Searching for boost libs and headers... (cached) 
Found boost libs: mason_packages/.link/lib
Found boost headers: mason_packages/.link/include
Checking for C++ header file boost/version.hpp... yes
Checking for Boost version >= 1.61... yes
Found boost lib version... 
Checking for C++ library boost_system... no
Could not find required header or shared library for boost system
Checking for C++ library boost_filesystem... no
Could not find required header or shared library for boost filesystem
Checking for C++ library boost_regex... yes
Checking for C++ library boost_program_options... yes
ValueError: invalid literal for int() with base 10: '':
 File "/root/src/mapnik/SConstruct", line 1600:
 boost_version = [int(x) for x in env.get('BOOST_LIB_VERSION_FROM_HEADER').split('_')]

(Build steps courtesy of keisan)

Why doesn't the system find the boost library 1.67? I don't remember installing boost 1.63. I have compiled and installed 1.67, but the build system does not use it. Where does the system look for boost on the system? I deleted all libboost_* files in /usr/local/lib and /usr/lib64, but still don't know where the system looks for boost. Can someone give a tip on how to tell the system about the newly compiled software?