Detect and use QNX QCC (GCC variant) compiler.

svn path=/branches/RC_1_33_0/boost/tools/jam/; revision=30867
Oops, it should qcc not QCC for the QNX/Momentics C compiler.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30881
"unix" was not getting defined for all variants of QNX, specifically Neutrino, which prevented JAMUNAME from getting set up correctly.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30882
Add support for STLport 5.0.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30925
Make it so that the MInGW DLLs are found automatically and don't have to be in the path.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30949
Ignore stlport-iostream as iostreams are always on in STLport-5.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30959
More tweaks for STLport-5 support:
* Handle "g" vs. "d" tags on STLport library names based on the compiler.
* Force multi-threaded builds as STLport-5 only supports that.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31000
Factor out the docs for stlport support, to make it consistent across toolsets.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31004
Basic toolset for QNX Neutrino 6.3.0 version of GCC.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31148
Support more versions of Intel Linux compiler. Thanks to Martin Wille.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31253
There is no python dl library on Tru64.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31278
merged from trunk

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31282
merged from trunk

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31326
Merge from HEAD:
* Fix QNX/qcc detection so it doesn't error on other OSs that happen to have a qcc command.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31359
merged from trunk

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31401
merged from trunk

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31471
Also search for the Python DLL in the install location to catch when Python is not installed globally (non-admin install). [merge from head]

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31475
merged from trunk

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31480
autoconf-like configure script support

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31483
Add documentation for VC8

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31572