Hello, The build steps (./configure, make ...) are pretty much what I did a few days ago, and it works fine for me on RedHat/CentOS 4. You have Boost 1.32 installed (the system default), and 1.34 installed in your personal area, right? So probably you are also running something a bit like Redhat Linux 4 ... I needed to do 3 things to complie and link against the new libraries: 1/ Make sure my compiler checks the new include path for headers before the system defaults - look in /home/ChandanNilange/work/boost/include/boost-1_34 - are there headers there? That path needs to be before /usr/include. For gcc/g++ that requires a -I option to the compiler. 2/ Make sure that my linker knows where the new libraries are - look in /home/ChandanNilange/work/boost/lib, and if that is full of libraries, then use -L to state the path 3/ Change the names of the libraries that you are trying to link to; for example I used to link to boost_regex, now I link to boost_regex-gcc34-mt-1_34 (I use the -mt version because my app is multi-threaded and also links to pthread). Then to run the application the library loader also needs to know where your new libraries are. I added the install directory of the new Boost libs to /etc/ld.so.conf, but I think that you can also use the environment variable LD_LIBRARY_PATH. (Search for the Program Library HOWTO if you need more information about that). Chandan Nilange wrote:

Hello John,

I find following *.a *.so but no libboost_regex.so at path :/home/ChandanNilange/work/boost/lib

libboost_regex-gcc34-1_34.a libboost_regex-gcc34-1_34.so libboost_regex-gcc34-1_34.so.1.34.0 libboost_regex-gcc34.a libboost_regex-gcc34-d-1_34.a libboost_regex-gcc34-d-1_34.so libboost_regex-gcc34-d-1_34.so.1.34.0 libboost_regex-gcc34-d.a libboost_regex-gcc34-d.so libboost_regex-gcc34-mt-1_34.a libboost_regex-gcc34-mt-1_34.so libboost_regex-gcc34-mt-1_34.so.1.34.0 libboost_regex-gcc34-mt.a libboost_regex-gcc34-mt-d-1_34.a libboost_regex-gcc34-mt-d-1_34.so libboost_regex-gcc34-mt-d-1_34.so.1.34.0 libboost_regex-gcc34-mt-d.a libboost_regex-gcc34-mt-d.so libboost_regex-gcc34-mt.so libboost_regex-gcc34.so

Also, I tried with all above *.a by stripping "lib" & .* from their name. However I can get messages like

/usr/include/boost/regex/v4/basic_regex.hpp:338: undefined reference to `boost::reg_expression

...

::reg_expression(std::allocator<char> const&)'

Do you think I have made some mistake during build. Following were the steps followed => gunzip boost_1_34_0.tar.gz => tar -xvf boost_1_34_0.tar => cd boost_1_34_0 => ./configure --prefix=/home/ChandanNilange/work/boost/ --with-libraries=regex => make install

Regards, Chandan

--- John Maddock wrote:

...

Chandan Nilange wrote:

...

Hello,

I have boost_1_32 version installed at /usr/include/boost Also, I have installed boost_1_34 at another path:/home/myname/work/boost/boost_1_34_0/

Now when I try to run with 1_34 version, it still points to 1_32 version at /usr/include (this is observed when I debug using gdb it refers to /usr/include/boost/regex/v4/match_results.hpp:118)

I tried following things:

1] export

LD_LIBRARY_PATH=/home/myname/work/boost/boost_1_34_0/boost:$LD_LIBRARY_PATH

...

export

PATH=/home/myname/work/boost/boost_1_34_0/boost:$PATH Looks right.

...

2] I am using following command for compilation g++ -c -g -I/home/myname/work/boost/boost_1_34_0/boost ${TEST_FILES_PATH}/${TEST}.c g++ ${TEST}.o -L/home/myname/work/boost/lib -lboost_regex Looks right: you could double check by checking the value of BOOST_VERSION in your code, and verifying that libboost_regex.so is present in /home/myname/work/boost/lib.

...

3] I am including boost header in ${TEST}.c as below #include "boost/regex.hpp" Also looks right.

Basically you have three things to double check:

1) Compile time, that the right headers are included. 2) Link time, that you're linking against the right library. 3) Run time, that LD_LIBRARY_PATH is set right.

Personnally if I were a better man, I'd put a bet on #2, but that's just a guess :-)

HTH, John.

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Hello John & Steven, Thanks for ur help. I was able to resolve the issue. As per the link http://gcc.gnu.org/onlinedocs/cpp/Search-Path.html "All the directories named by -I are searched, in left-to-right order, before the default directories. The only exception is when dir is already searched by default. In this case, the option is ignored and the search order for system directories remains unchanged." Since we have "boost" directory at default path:/usr/include/boost, it used to look /usr/include/boost before -I/boost_1_34_0/boost Workaround Done: used -I/boost_1_34_0 Now "boost_1_34_0" is not in default path hence looked first Though this workaround works, let me know if this is the right way to go. Thanks & Regards, Chandan ____________________________________________________________________________________ Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games. http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow