[Boost-users] Boost regex/ICU link problems on linux

From: Gary M Ciany (gmcian1_at_[hidden])
Date: 2007-03-30 12:34:05

I am having a problem getting the boost regex icu example
code to link on linux.

I am on Redhat Linux 9, using gcc 3.4.4.  I downloaded the src ICU 
package and built
and installed it as root in /usr/local with no problem.  I downloaded 
boost_1_33_1 and got it
to build and install with no problem.  I first did a configure telling 
it where my ICU was located.
As it built it stated it was being built with ICU in /usr/local/include.

So now I got to build the regex/example code.  There is a program under 
snippets/icu_example.cpp.
I went into that example and forced the code to compile the main using 
the icu.  By that I mean I
took out the #ifdef BOOST_HAS_ICU and deleted the code around the main 
that printed
"<NOTE>ICU support not enabled..."

The code compiles, but when it goes to link I get all these unresolved 
external references..e.g.
../../../bin/boost/libs/regex/example/icu_example.test/gcc/debug/threading-multi/icu_example.0(.text+0x3e9): 

In function 'extract_greek(icu_3_6::UnicodeString const&)':
snippets/icu_example.cpp:61 undefined reference to 
icu_3_6::UnicodeString::UnicodeString(unsigned short const*, int)'

I get other cases where for example..
   ../boost_1_33_1/boost/regex/icu.hpp:1001: Undefined reference to 
'icu_3_6::UnicodeString::UnicodeString()'

(It seems that maybe the prefix icu_3_6 is being added in the class 
resolution when creating this .o but was not used in
the creation of the .a boost/icu libraries. )

Any idea how to fix this?

Gary