Public bug reported:
== SRU RISC-V 5.8 Focal backport kernel ==
The 5.8 RISC-V kernel has boot issues when compiled with gcc 9. This can
be fixed by building it with gcc-10.
== Fix ==
Use gcc-10, e.g.:
diff --git a/debian.master/control.stub.in b/debian.master/control.stub.in
index 9c1e956092bf..3b920328caff 100644
--- a/debian.master/control.stub.in
+++ b/debian.master/control.stub.in
@@ -68,7 +68,7 @@ Section: devel
Priority: optional
Provides: linux-source
Depends: ${misc:Depends}, binutils, bzip2, coreutils
-Recommends: libc-dev, gcc, make
+Recommends: libc-dev, gcc-10, make
Suggests: libncurses-dev | ncurses-dev, kernel-package, libqt3-dev
Description: Linux kernel source for version PKGVER with Ubuntu patches
This package provides the source code for the Linux kernel version
diff --git a/debian/rules b/debian/rules
index 627ca3cb968f..425d33b35fde 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,6 +8,7 @@
#
DEBIAN=$(shell awk -F= '($$1 == "DEBIAN") { print $$2 }' <debian/debian.env)
+gcc=gcc-10
# dpkg-buildpackage passes options that are incomptatible
# with the kernel build.
== Testing ==
Without the fix, the kernel will panic during boot. With the fix, the
kernel boots fine.
== Where problems could occur ==
Using a different compiler version can always introduce subtle object
code differences and hence potential bugs, however, the same gcc version
is being used to build the groovy variant of the same kernel and we know
that this works fine w/o any observable gcc specific issues.
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: Colin Ian King (colin-king)
Status: In Progress
** Changed in: linux (Ubuntu)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1913864
Title:
Use gcc-10 to build 5.8 riscv backport kernel for focal
Status in linux package in Ubuntu:
In Progress
Bug description:
== SRU RISC-V 5.8 Focal backport kernel ==
The 5.8 RISC-V kernel has boot issues when compiled with gcc 9. This
can be fixed by building it with gcc-10.
== Fix ==
Use gcc-10, e.g.:
diff --git a/debian.master/control.stub.in b/debian.master/control.stub.in
index 9c1e956092bf..3b920328caff 100644
--- a/debian.master/control.stub.in
+++ b/debian.master/control.stub.in
@@ -68,7 +68,7 @@ Section: devel
Priority: optional
Provides: linux-source
Depends: ${misc:Depends}, binutils, bzip2, coreutils
-Recommends: libc-dev, gcc, make
+Recommends: libc-dev, gcc-10, make
Suggests: libncurses-dev | ncurses-dev, kernel-package, libqt3-dev
Description: Linux kernel source for version PKGVER with Ubuntu patches
This package provides the source code for the Linux kernel version
diff --git a/debian/rules b/debian/rules
index 627ca3cb968f..425d33b35fde 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,6 +8,7 @@
#
DEBIAN=$(shell awk -F= '($$1 == "DEBIAN") { print $$2 }' <debian/debian.env)
+gcc=gcc-10
# dpkg-buildpackage passes options that are incomptatible
# with the kernel build.
== Testing ==
Without the fix, the kernel will panic during boot. With the fix, the
kernel boots fine.
== Where problems could occur ==
Using a different compiler version can always introduce subtle object
code differences and hence potential bugs, however, the same gcc
version is being used to build the groovy variant of the same kernel
and we know that this works fine w/o any observable gcc specific
issues.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1913864/+subscriptions
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