5.2.0-Defining C projects - problem with MULTITHREADED FALSE

Question

Hi,
I am having a problem importing a UDS5.0.9 PEX file into a UDS5.2.0 environment that defines a "C" project.
I have stripped down our PEX file to a level that highlights the problem (see below). The original PEX file links to a number of "externalstaticlibs" and "externalobjectfiles", it provides access via Forte to our "C" routines that are not guaranteed to be multi-thread safe. A number of our similar routines may attempt to access these external libraries/objects at the same time via the "LibProb" library similar to that below.
When "fcompile" is run on the "LibProb" project the compile fails due to a number of defines missing in UDS5.2.0 include files. When the PEX file MultiThreaded property is changed from FALSE to TRUE , "fcompile" works....changing the MultiThreaded property would concern me -especially as a number of our routines maybe attempting to access the same libraries at the same time.
The problem also seems to exist with UDS5.1.3.
The platform we use is IBM AIX5.1 with Visual Age C++ 5.0.2.1.
1. Has anybody came across this problem before??
2. Do you know any way round the problem??
Specific details follow.
Can anybody help - thanks,
-Ray.
=====Library Problem - PEX File==========
begin C LibProb from library;
includes Framework;
class MyFunction inherits from Framework.Object
has public  method MyInit(input anyInt : Framework.int): Framework.int HAS PROPERTY id = 1 ;
has property
     distributed=(allow=off, override=on);
     id = 1; proxyId = 0;
end class;
HAS PROPERTY
     CompatibilityLevel = 0;
     Restricted = FALSE;
     MultiThreaded = FALSE;
        extended = (ExternalObjectFiles = 'anyfunc');
end LibProb;
====end of PEX File======When "fcompile"ing the code generated by "makedistrib" the following name lookup problems occur (property "Multithreaded" is "FALSE")...
Compiling.
/usr/vacpp/bin/xlC_r -c -+ -qlanglvl=compat366 -qflag=I:E -qchars=signed -q32 -DNeedFunctionPrototypes -qthreaded 
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/os -I/usr/apps/forte/mydir/UDS5.2.0/install/inc/cmn
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/ds -I/usr/apps/forte/mydir/UDS5.2.0/install/inc/handles
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/ds -I/usr/include/Motif2.1
-I/usr/apps/forte/mydir/UDS5.2.0  libprob.cc
"libprob.cc", line 45.49: 1540-0274 (S) The name lookup for "qqSH_TSK_MPROP_ENABLE_SWITCH" did not find a declaration.
"libprob.cc", line 46.9: 1540-0274 (S) The name lookup for "qqOS_CLIBLOCK" did not find a declaration.
"libprob.cc", line 56.9: 1540-0274 (S) The name lookup for "qqOS_CLIBULOCK" did not find a declaration.
Error during compilation, abortingThe UDS5.1.x/UDS5.2.0 header files seem to have changed, namely UDS5.2.0/install/inc/cmn tskmprop.h and opsys.cdf
However when I change the property Multithreaded to TRUE in the PEX file, the "fcompile" works....
Compiling.
/usr/vacpp/bin/xlC_r -c -+ -qlanglvl=compat366 -qflag=I:E -qchars=signed -q32 -DNeedFunctionPrototypes -qthreaded 
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/os
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/cmn
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/ds
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/handles
-I/usr/apps/forte/mydir/UDS5.2.0/install/inc/ds
-I/usr/include/Motif2.1
-I/usr/apps/forte/mydir/UDS5.2.0  libprob2.cc
Linking.
/usr/vacpp/bin/makeC++SharedLib_r -p 1026  -o liblibprob2.a -lld -L/usr/vacpp/lib -lC_r -lC
-L/usr/lib/threads -lpthreads -lc_r
-L/usr/apps/forte/mydir/UDS5.2.0/install/lib -lqqknpthrd -L/usr/apps/forte/mydir/UDS5.2.0/install/lib
-lqqcm -L/usr/apps/forte/mydir/UDS5.2.0/install/lib -lqqdo -L/usr/apps/forte/mydir/UDS5.2.0/install/lib
-lqqfo -L/usr/apps/forte/mydir/UDS5.2.0/install/lib -lqqsm  
-L/usr/apps/forte/mydir/UDS5.2.0/userlib    libprob2.o  
/usr/apps/forte/mydir/UDS5.2.0/abc_test/compile_dir/LibProb2/anyfunc.o

Answer 1

I do remember a while back they decided to start using only POSIX threading library going forward and not support the old threading library. A work around may be to put mutex lock around your entry point to the library which will make sure only one person access the library at a time.
ka