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README.md: Toolchain and OS specific remarks.

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Uwe Bonnes 2020-09-22 11:59:53 +02:00 committed by UweBonnes
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@ -24,6 +24,20 @@ See online documentation at https://github.com/blacksphere/blackmagic/wiki
Binaries from the latest automated build are at http://builds.blacksphere.co.nz/blackmagic
Toolchain specific remarks
==========================
Most firmware building is done with the most recent suite from https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm.
If you have a toolchain from other sources and find problems, check if it is a failure of your toolchain and if not open an issue or better provide a pull request with a fix.
OS specific remarks for BMP-Hosted
==================================
Most hosted building is done on and for Linux. BMP-hosted for windows can also be build with Mingw on Linux.
On BSD/Macos, using dev/tty.usbmodemXXX should work but unresolved discussions indicate a hanging open() call on the second invocation. If that happens, try with cu.usbmodemXXX.
Reporting problems
==================
Before reporting issues, check against the latest git version. If possible, test against another target /and/or debug probe. Consider broken USB cables and connectors. Try to reproduce with bmp-hosted with at least debug bit 1 set (blackmagic -v 1 ...), as debug messages will be dumped to the starting console. When reporting issues, be as specific as possible!
Sample Session
=============
```console