Just thought I would bring this to your attention. This is not my work but its quite new and will benefit a lot of people here working on MED17.x and SIMOS.
A fully built (and source-code with scripts to roll your own) version of the Infineon Tricore Toolchain (Based on hightec GPL GCC source-codes) has turned up on Github!

Here's what you need. It includes;
> GCC 4.9.4 Full Sources
> Newlib Full Sources
> Bintools Full sources
https://github.com/volumit/package_494/
(Full source-codes to everything)

There is also a GCC 4.9.4 Pre-built binaries version ready for use with Mingw/Windows of Tricore and Infineon AURIX series.
https://github.com/volumit/tricore_gcc494_mingw_bins
(Windows Pre-built MinGW binaries)

It contains the binaries of the Tricore/AURIX GCC 4.9.4 version. Build on Ubuntu for Windows.
extract the files e.g. with 7zip. (see https://www.7-zip.org/)

Furthermore it contains a very very useful "tricore_494_mingw_shell.zip" series of scripts.sh so you can build everything from source-code yourself.
Warning: This need a needs the compilation of the Linux versions first.

If you prefer Linix there is also a GCC 4.9.4 Pre-built binaries for Ubuntu too...
https://github.com/volumit/tricore_gcc494_linux_bins
(Ubuntu Linux Pre-built Binaries)

No more toolchain trials or limitations...

This is quite handy - and for those who have written to get the GPL source dump from Hightec in the past, this seems above and beyond in that it includes newlib/libc as well as the GDB fork.

This mystery individual also appears to be making major strides in improving Tricore QEMU.

A huge win for those of us working Tricore overall.

And to get started now the cost barrier has been reduced even further...

Infineon has produced a super cheap TC334 (Aurix) based 'learning' board.

If your in EU you can buy one for just 50 Euro's, no excuse not to get one now, its basically an Arduino on speed
https://www.ehitex.de/en/starter-kits/for-aurix/2718/kit-a2g-tc334-lite?c=157

Product information "KIT_A2G_TC334_LITE"
AURIX™ TC334 lite kit is equipped with a 32-Bit Single-Chip AURIX™ TriCore™ based-Microcontroller AURIX™ TC334.

Power:
    on-board miniWiggler Micro-AB USB interface
    external powering 5 V…40 V (recommended 7 V...14 V)

Connectors:
    Most AURIX™ pins available on expansion connectors (X1, X2)
    Two Infineon Shield2Go connectors
    Arduino compatible connectors for 3.3 V
    mikroBUS™ connector
    Micro-USB connector
    DAP Debug connector
    CAN connector
    RJ45 connector

Others:
    CAN transceiver TLE9251VSJ from Infineon
    1 user push-button, 3 user LEDs
    Reset push-button
    Potentiometer (10 kOhm) for variable analog input

...Upset the wrong competent engineer and there will be consequences