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GCC switches required to use custom-built newlib

From: "Schwarz, Konrad" <konrad dot schwarz at siemens dot com>
To: "newlib at sourceware dot org" <newlib at sourceware dot org>
Date: Fri, 9 Mar 2018 16:00:09 +0000
Subject: GCC switches required to use custom-built newlib
Authentication-results: sourceware.org; auth=none

Hello

Assuming I have built my own version of newlib, how can a pre-built GCC be instructed (via command-line switches or environment variables) to link against that version?  (I am interested in cross compilation).

I think that -sysroot is designed for this, but am not sure; xxx-gcc -print-search-dirs doesn't have = signs prefixing all the paths.  Also, I probably need to explicitly link against $(xxx-gcc -print-libgcc-file-name), right?

Regards

Konrad

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