The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.06 snapshot of Linaro GCC 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+svn249190 and includes performance improvements and bug fixes backported from mainline GCC. The contents of this snapshot 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/7.1-2017.06/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 7.1+svn249190 * Backport of [Bugfix] [AArch32] PR target/71607 Fix ICE when loading constant * Backport of [Bugfix] [AArch64] PR target/80671 config/aarch64/cortex-a57-fma-steering.c:416: bad statement order * Backport of [Bugfix] PR tree-optimization/79697 unused realloc(0, n) not eliminated * Backport of [Bugfix] PR tree-optimization/80613 ICE in is_gimple_reg_type with -O2 * Backport of [AArch32] Add a new target hook to compute the frame layout * Backport of [AArch32] Add fuchsia support to libgcc * Backport of [AArch32] FreeBSD arm libgcc config.host * Backport of [AArch32] Model Cortex-A53 load forwarding * Backport of [AArch64] Accept more addressing modes for PRFM * Backport of [AArch64] Add aes and sha reservations for Thunderx2t99 * Backport of [AArch64] Add crc reservations for Thunderx2t99 * Backport of [AArch64] Improve float to int moves * Backport of [AArch64] Set jump alignment to 4 for Cortex cores * Backport of [AArch64] Tighten move constraints for symbolic operands * Backport of [Misc] Check the alternate cost model just as costs_lt_p * Backport of [Misc] Record equivalences for spill registers * Backport of [Testsuite] [AArch32] Only test tls-disable-literal-pool.c if target supports native TLS * Backport of [Testsuite] [AArch32] Replace absolute line numbers in gcc.target/arm * Backport of [Testsuite] [AArch64] Replace absolute line numbers in gcc.target/aarch64

o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.3+svn249140 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/6.3-2017.06/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 6.3+svn249140

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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.