pan3793 commented on code in PR #8235:
URL: https://github.com/apache/hadoop/pull/8235#discussion_r2777278940
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BUILDING.txt:
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@@ -29,7 +29,17 @@ This requires a recent version of docker (1.4.1 and higher
are known to work).
On Linux / Mac:
Install Docker and run this command:
- $ ./start-build-env.sh [OS platform]
+ $ [CPU_ARCH=<arch>] ./start-build-env.sh [OS platform]
+
+ - [CPU_ARCH=<arch>] One of [x86_64, amd64, aarch64, arm64].
+ Default is output of 'uname -m'. Set to 'x86_64' on arm machine
+ (e.g. Apple M1) to create an x86_64 container.
+ Note:
+ CPU arch emulation may have significant performance overhead.
Review Comment:
On Apple Silicon, Docker can leverage Rosetta2 for x86 emulation, the
performance overhead is acceptable.
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