Re: [Boost-users] problem in multithreaded regex_replace on linux

From: Ashish Varman (ashish_at_[hidden])
Date: 2006-06-20 10:14:17

Dear John

Apparantly, I am doing something wrong that is very elementary.  I do 
not have any -mt version of the regex library.  I even dispensed with 
STLport and tried to build boost first for default system libraries only.
After giving the command  "bjam  -sTOOLS=gcc"  in the directories 
boost_1_33_1/libs/regex/build and boost_1_33_1/libs/thread/build,  I 
have the following libraries:

$ find | grep "\.a$"
./libs/thread/build/bin-stage/libboost_thread-gcc-mt-d-1_33_1.a
./stage/lib/libboost_regex-gcc-d-1_33_1.a
./stage/lib/libboost_regex-gcc-1_33_1.a
./bin/boost/libs/regex/build/libboost_regex.a
./bin/boost/libs/regex/build/libboost_regex.a/gcc/debug/libboost_regex-gcc-d-1_33_1.a
./bin/boost/libs/regex/build/libboost_regex.a/gcc/release/libboost_regex-gcc-1_33_1.a
./bin/boost/libs/thread/build/libboost_thread.a
./bin/boost/libs/thread/build/libboost_thread.a/gcc/debug/threading-multi/libboost_thread-gcc-mt-d-1_33_1.a

I have not been able to find how to build -mt versions of the regex 
library.  Apparantly, the threads library is built so by default.

Also, while trying to compile static_mutex_test.cpp, a lot of undefined 
references crop up even when I link with both boost::regex and 
boost::thread.  The command was
$ g++ -I ~/Software/boost_1_33_1 -L 
~/Software/boost_1_33_1/libs/thread/build/bin-stage/ -L 
~/Software/boost_1_33_1/stage/lib/ -lboost_thread-gcc-mt-d-1_33_1 
-lboost_regex-gcc-1_33_1 -pthread static_mutex_test.cpp
/tmp/ccvkfjk2.o(.text+0x16): In function `failed_test(char const*, int, 
char const*)':
: undefined reference to 
`boost::scoped_static_mutex_lock::scoped_static_mutex_lock[in-charge](boost::static_mutex&, 
bool)'
/tmp/ccvkfjk2.o(.text+0xa8): In function `failed_test(char const*, int, 
char const*)':
: undefined reference to 
`boost::scoped_static_mutex_lock::~scoped_static_mutex_lock [in-charge]()'

----------- snip --------------

/tmp/ccvkfjk2.o(.text+0x5da): In function `t3()':
: undefined reference to 
`boost::scoped_static_mutex_lock::~scoped_static_mutex_lock [in-charge]()'
/tmp/ccvkfjk2.o(.text+0x5f4): In function `t3()':
: undefined reference to 
`boost::scoped_static_mutex_lock::~scoped_static_mutex_lock [in-charge]()'
collect2: ld returned 1 exit status

Since the scoped_static_mutex_lock is defined only in the regex sources, 
I think the errors are due to the -mt versions not being built. 
I have verified that -mt versions are being built and used on windows.  
I tried using the same technique (building using makefiles) but no luck
$ make -f gcc.mak
$ find | grep "\.a$"
./gcc/libboost_regex-gcc-1_33_1.a
./gcc/libboost_regex-gcc-d-1_33_1.a

So now my main problem becomes "How do I build -mt versions of regex on 
linux".

I hope the answer does not make me look too dumb.

Thanks in advance
Yours Sincerely
Ashish Varman