The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.05 snapshot of Linaro GCC 5, 6 and 7 source packages.

o 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

o Linaro GCC 7 monthly snapshot[1] is based on FSF GCC 7.1+svn247824 and includes performance improvements and bug fixes backported from mainline GCC. The contents of this snapshot will be used for the first stable[2] quarterly release in the GCC 7 series.

This snapshot tarball is available on: http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.05/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 7.1+svn247824 * Backport of [AArch32] Allow combination of aprofile and rmprofile multilibs * Backport of [AArch32] Define TM_MULTILIB_CONFIG for ARM multilib * Backport of [AArch32] Rename FPSCR builtins to correct names * Backport of [AArch32] Set mode for success result of atomic compare and swap * Backport of [AArch64] Enable AUTOPREFETCHER_WEAK with -mcpu=generic * Backport of [AArch64] Improve address cost for -mcpu=generic * Backport of [AArch64] Update alignment for -mcpu=generic * Backport of [Testsuite] Require c99_runtime for pr78622.c

o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.3+svn247789 and includes performance improvements and bug fixes backported from mainline GCC. This snapshot contents will be part of the 2017.08 stable[2] quarterly release.

This snapshot tarball is available on: http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.05/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 6.3+svn247789 * Backport of [Bugfix] [AArch32] PR target/71607: Fix ICE when loading constant * Backport of [AArch32] Add support for -mpure-code option * Backport of [AArch32] Enable Purecode for ARMv8-M Baseline * Backport of [AArch32] Fix arm-netbsdelf bootstrap * Backport of [AArch32] Fix pure-code test * Backport of [AArch32] Fix testism with pure-code tests for non Cortex-M targets * Backport of [AArch32] Fix type for .init_array.* and .fini_array.* sections * Backport of [AArch64] Fix type for 1-element load * Backport of [AArch64] Model Cortex-A53 load forwarding

o Linaro GCC 5 monthly snapshot[1] is based on FSF GCC 5.4+svn247822 and includes performance improvements and bug fixes backported from mainline GCC. This snapshot contents will be part of the next maintenance release.

This snapshot tarball is available on: http://snapshots.linaro.org/components/toolchain/gcc-linaro/5.4-2017.05/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 5.4+svn247822

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