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LIN6-7140 : CLONE - Documentation doesn't explain how to patch and build glibc

Created: Apr 16, 2014    Updated: Dec 3, 2018
Resolved Date: Sep 4, 2014
Previous ID: LIN5-18537
Found In Version:
Fix Version:
Severity: Standard
Applicable for: Wind River Linux 6
Component/s: Docs


Customer needs to patch glibc, but the documentation does not explain how to do it.
The User's guide mentions a build-libc feature, which does not seem to exist.
'configure --help' mentions the template argument, but the doc doesn't. 
                          (See also the --with-template option.)

                          Rebuild glibc from source. Only meaningful with the WR toolchain. The resulting binaries are not supported; problems must be reproduced on the
                          prebuilt binaries.

                          Note: to configure the rebuilt glibc, you will need to edit the local.conf and follow the instructions around the DISTRO_FEATURES_LIBC

I would create a eglibc-sourcery-compile.bbappend recipe, but, again, without documentation, that's just a guess.
Please provide clear steps for customers to achieve the glibc patching objective.


Create a layer with this eglibc-sourcery-compile.bbappend recipe with this content:
FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI_append = " file://my1st.patch file://my2nd.patch"
Store the patches in the layer/files/ directory.
Create a project with this layer and --with-template option for libc.

Steps to Reproduce

Read documentation.
Search the information about how to patch glibc: it is not there.

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