Update gcc from 5.5.0 to 7.3.0 #611

gcc 7.3 supports `-mindirect-branch=thunk-extern` which is used (if available) by the kernel build to mitigate Spectre attacks with a method called retpoline. If `-mindirect-branch=thunk-extern` is not available, the kernel build will not (no longer) emit a warning [1]. The insufficient protection will be visible on the running system root@dose:/sys# cat /sys/devices/system/cpu/vulnerabilities/spectre_v2 Vulnerable: Minimal generic ASM retpoline whereas when the kernel is compiled with gcc 7.3 (`prun gcc-7.3.0-0 ./linux-4.14.18-207.bee`) the output is: root@dose:~# cat /sys/devices/system/cpu/vulnerabilities/spectre_v2 Mitigation: Full generic retpoline 1. Changes GCC 7: https://gcc.gnu.org/gcc-7/changes.html 2. Changes GCC 6: https://gcc.gnu.org/gcc-6/changes.html 1. Porting to GCC 7: https://gcc.gnu.org/gcc-7/porting_to.html 2. Porting to GCC 6: https://gcc.gnu.org/gcc-6/porting_to.html [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.14.y&id=198660b7a5dd33b114001023d540c9072603e2a8

This is a template be0 file.

Installed shared libraries of gcc-5.5.0 which are not available in gcc-7.3.0 and are required by other packages. Currently the only library identified is `libgfortran.so.3`. Created with cp scripts/TEMPLATE.be0 gcc_compat_5.5.0.be0 and the following changes: < # BEE_VERSION NAME-1.0-0 --- > # BEE_VERSION gcc_compat_5.5.0-1.0-0 12c12 < SRCURL[0]="https://SERVER/PATH/NAME.${PKGVERSION}.tar.gz" --- > SRCURL=() 64,67c64,69 < #mee_install() { < # bee_install < #} < ## by default this may be 'make install DESTDIR="${D}"' --- > mee_install() { > cd ${D} > tar xpf /src/mariux/beeroot/packages/gcc-5.5.0-1.x86_64.bee.tar.bz2 \ > /usr/lib/libgfortran.so.3/ \ > /usr/lib/libgfortran.so.3.0.0 > }

Update gcc from 5.5.0 to 7.3.0 #611

Update gcc from 5.5.0 to 7.3.0 #611

Commits on Feb 12, 2018