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Emerging chromium-72.0.3626.28-r1 on arm64 (patch)
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Joined: 21 May 2014
Posts: 296

PostPosted: Tue Jan 15, 2019 12:26 am    Post subject: Emerging chromium-72.0.3626.28-r1 on arm64 (patch) Reply with quote


I've been looking at www-client/chromium-72.0.3626.28-r1 on arm64 over the last few days. Had to patch the main tree ebuild and source a little bit to get it to build: here are the details in case it is of use to anyone else.

First, I had to modify the ebuild (bumped it to -r2 in the overlay used by the gentoo-on-rpi3-64bit project), because:
  • I experienced multiple build failures under gcc-8.2.0; so set CHROMIUM_FORCE_CLANG=yes;
  • however, building under Clang/LLVM, I had to enable an additional keeplib (specifically, third_party/swiftshader/third_party/llvm-7.0);
  • more for my use case than of general interest, but I needed to omit the unconditional media-libs/openh264 DEPEND (as that package has RESTRICT="bindist", and I need everything to get pushed up to a binhost); so, added a USE flag to control this;

Here's a diff between the main-tree r1 and the modified r2 ebuild, showing these changes:
--- chromium-72.0.3626.28-r1.ebuild
+++ chromium-72.0.3626.28-r2.ebuild
@@ -17,8 +17,8 @@
-KEYWORDS="~amd64 ~x86"
-IUSE="component-build cups gnome-keyring +hangouts jumbo-build kerberos neon pic +proprietary-codecs pulseaudio selinux +suid +system-ffmpeg +system-icu +system-libvpx +tcmalloc widevine"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="component-build cups gnome-keyring +hangouts jumbo-build kerberos neon +openh264 pic +proprietary-codecs pulseaudio selinux +suid +system-ffmpeg +system-icu +system-libvpx +tcmalloc widevine"
 RESTRICT="!system-ffmpeg? ( proprietary-codecs? ( bindist ) )"
@@ -42,7 +42,7 @@
    system-libvpx? ( media-libs/libvpx:=[postproc,svc] )
-   >=media-libs/openh264-1.6.0:=
+   openh264? ( >=media-libs/openh264-1.6.0:= )
    pulseaudio? ( media-sound/pulseaudio:= )
    system-ffmpeg? (
@@ -109,7 +109,8 @@
+# arm64 has several build failures under gcc
 if [[ ${CHROMIUM_FORCE_CLANG} == yes ]]; then
    BDEPEND+=" >=sys-devel/clang-5"
@@ -145,6 +146,7 @@
+   "${FILESDIR}/chromium-crashpad.patch"
 pre_build_checks() {
@@ -332,6 +334,7 @@
+      third_party/swiftshader/third_party/llvm-7.0
@@ -451,12 +454,14 @@
-      openh264
+   if use openh264; then
+      gn_system_libraries+=( openh264 )
+   fi
    if use system-ffmpeg; then
       gn_system_libraries+=( ffmpeg opus )

(NB the rpi3-overlay repo where this ebuild lives is only for use with the arm64 RPi3; some of the above changes should probably be keyword-specific, were the ebuild to be used more generally)

Second, to allow third-party/crashpad to build, I had to patch one of its files slightly (which was missing a #include); here's the (trivial) chromium-crashpad.patch, to place in the www-client/chromium/files/ directory (as you can see above, its path has been added to PATCHES in the -r2 ebuild):

--- a/third_party/crashpad/crashpad/snapshot/linux/
+++ b/third_party/crashpad/crashpad/snapshot/linux/
@@ -14,6 +14,7 @@
 #include "snapshot/linux/cpu_context_linux.h"
+#include <limits>
 #include <stddef.h>
 #include <string.h>

The resulting binary package is available from the binhost, here. Seems to work OK in basic testing on an RPi3B+.

Users of (a reasonably up-to-date version of) the gentoo-on-rpi3-64bit image may get this simply by issuing:
demouser@pi64 ~ $ sudo emaint sync --repo rpi3
demouser@pi64 ~ $ emerge -avu www-client/chromium


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