Easy newbie questions

[shea martin]

Setup:
Debin Linux 3.0b (woody) on x86
did a configure, make, make install,
and everything seems to be fine.

Problem 1.  Include files are not found, when I try to compile.  (ie. thread.h, socket.h, strchar.h...).  (I am trying to compile testthread.cpp, in demo/ , via this command:
g++ testthread.cpp
) 
Shouldn't make install, have put these files where they can be found?  If I change
the #include statements from <socket.h>, <thread.h>, etc. to "src/socket.h", "src/thread.h", etc. and then compile, I can get past these file not found errors.  Do I manually have to copy the src dir somewhere on system, then specify full path to that dir, in #include statements?

Problem 2. After altering the headers (see Problem 1), when I try to compile testthread.cpp, with g++ testthread.cpp, I get this output:
delly:~/CommonC++-1.9.3/src$ g++ testthread.cpp
/tmp/cchtuaSC.o: In function `WaitNValue(int)':
/tmp/cchtuaSC.o(.text+0x36): undefined reference to `ost::ccxx_sleep(unsigned long)'
/tmp/cchtuaSC.o: In function `WaitNNotValue(int)':
/tmp/cchtuaSC.o(.text+0x76): undefined reference to `ost::ccxx_sleep(unsigned long)'
/tmp/cchtuaSC.o: In function `ThreadTest::ThreadTest(void)':
/tmp/cchtuaSC.o(.text+0x9b): undefined reference to `ost::Thread::Thread(int, unsigned int)'
/tmp/cchtuaSC.o: In function `ThreadTest::Run(void)':
/tmp/cchtuaSC.o(.text+0x11a): undefined reference to `ost::Thread::Yield(void)'
/tmp/cchtuaSC.o: In function `main':
/tmp/cchtuaSC.o(.text+0x1aa): undefined reference to `ost::Thread::Start(ost::Semaphore *)'
/tmp/cchtuaSC.o(.text+0x31b): undefined reference to `ost::Thread::Suspend(void)'
/tmp/cchtuaSC.o(.text+0x400): undefined reference to `ost::Thread::Resume(void)'
/tmp/cchtuaSC.o(.text+0x4fb): undefined reference to `ost::Thread::Suspend(void)'
/tmp/cchtuaSC.o(.text+0x50d): undefined reference to `ost::Thread::Suspend(void)'
/tmp/cchtuaSC.o(.text+0x5f1): undefined reference to `ost::Thread::Resume(void)'
/tmp/cchtuaSC.o(.text+0x6db): undefined reference to `ost::Thread::Resume(void)'
/tmp/cchtuaSC.o(.text+0x7db): undefined reference to `ost::Thread::Resume(void)'
/tmp/cchtuaSC.o: In function `ost::Thread::~Thread(void)':
/tmp/cchtuaSC.o(.gnu.linkonce.t._._Q23ost6Thread+0x1d): undefined reference to `ost::Thread::Terminate(void)'
collect2: ld returned 1 exit status

Any hints?
TIA

~S
shea@shaw.ca

[shea martin]

After some 'fooling around', I found that if I do a g++ -lccgnu -lpthread testthread.cpp
that I can eliminate most of the compile errors.  Now, the only error I get is:
/usr/lib/libccgnu.so: undefined reference to `dlerror'
/usr/lib/libccgnu.so: undefined reference to `dlclose'
/usr/lib/libccgnu.so: undefined reference to `dlopen'
/usr/lib/libccgnu.so: undefined reference to `dlsym'
collect2: ld returned 1 exit status

[prashant patel]

After a lot of fiddling this minimum command  line will get your code working

g++ -DHAVE_CONFIG_H  -I/usr/include/cc++ -I
    /usr/include -D_GNU_SOURCE -D_REENTRANT
    -D_THREAD_SAFE
    -c testthread.cpp
g++ -D_GNU_SOURCE -D_REENTRANT -D_THREAD_SAFE -o
     testthread testthread.o /usr/lib/libccgnu.so
     -pthread -ldl

[Frediano Ziglio]

You should include -I/usr/include, not -I/usr/include/cc++ (use #include <cc++/xxx.h> in source)

[prashant patel]

How would it make a diffrence? Still point to the same header file. Also which classes fall in the libccgnu.so and libccext.so there is not mention about it in the documentation.

[Frediano Ziglio]

Using this method is like a "file namespace"
If you include a file like <name.h> name.h can reside both in /usr/include and in /usr/include/cc++.
Yes, not mentioned.
Primary, basic I/O (Socket and log) and syncronization are ccgnu other (digest, url/xml) in ccext.

freddy77

[Nick Liebmann]

Well if you add -ldl to that command line you should get rid of the other errors....

[Frediano Ziglio]

To compile testthread and other demos / tests you should use Makefile or include also the cc++ library linking. Best to use command ccgnu-config...

freddy77

[Anonymous]

The 'ccgnu-config' script is installed with CC++. To
get that flags suited for your system you just need
to catch the output of the following command:

   $ ccgnu-config --flags --includes --libs

(see 'ccgnu-config --help' for more info)

[prashant patel]

could you give a example about how to the script, while compiling and linking. Also about the shared libraries libccgnu.so and libccext.so which classes are suppose to like espically with libccext.so

[Anonymous]

Sure, for instance, if you type:

   $ ccgnu-config

   In the system I am currently testing in, you
get the following output:

-I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -g -O2 -D_GNU_SOURCE
/usr/local/include/cc++
-L/usr/local/lib -lccgnu -ldl -pthread

These are the flags, includes and libraries you
need to use to compile with cc++. Then you just
need to get the output of that command:

    $ g++ `ccgnu-config --flags --includes --libs` -ooutput file1.cpp file2.cpp ...

ccgnu-config has also other options, see the
output of 'ccgnu-config --help'

[Anonymous]

oops, sorry, the first command is
  
   $ ccgnu-config --flags --includes --libs

[shea martin]

Thanks for the help