The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2019.01 
snapshot of the Linaro GCC 7 source package.

The GCC 7 series introduced an ABI change for ARM targets by fixing a bug 
(present since GCC 5, see link below) that affects conformance to the procedure 
call standard (AAPCS). The bug affects some C++ code where class objects are 
passed by value to functions and could result in incorrect or inconsistent code 
being generated. If the option -Wpsabi is enabled (on by default) the compiler 
will emit a diagnostic note for code that might be affected by this ABI change.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728

For an explanation of the changes please see the following website:

https://gcc.gnu.org/gcc-7/changes.html

This snapshot1 is based on FSF GCC 7.4+svn267072 and includes performance 
improvements and bug fixes backported from mainline GCC. The contents of this 
snapshot will be part of the 2019.01 stable2 periodic release.

Interesting changes in this GCC source package snapshot include:

Updates to GCC 7.4+svn267072
Linaro bug 4007: “Internal compiler error with -mcpu=thunderx2t99” is fixed
Feedback and Support

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[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.

[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.

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