failed to build boost176 on m1 mac with variants "+universal"

[water137780117]

boost176 cannot be built with variants +universal

sudo port install boost176 +universal
--->  Computing dependencies for boost176
--->  Fetching archive for boost176
--->  Attempting to fetch boost176-1.76.0_3+no_single+no_static+python310+universal.darwin_21.arm64-x86_64.tbz2 from https://pek.cn.packages.macports.org/macports/packages/boost176
--->  Attempting to fetch boost176-1.76.0_3+no_single+no_static+python310+universal.darwin_21.arm64-x86_64.tbz2 from https://kmq.jp.packages.macports.org/boost176
--->  Attempting to fetch boost176-1.76.0_3+no_single+no_static+python310+universal.darwin_21.arm64-x86_64.tbz2 from https://packages.macports.org/boost176
--->  Fetching distfiles for boost176
--->  Verifying checksums for boost176
--->  Extracting boost176
--->  Applying patches to boost176
--->  Configuring boost176
--->  Building boost176
Error: Failed to build boost176: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_mirrors.tuna.tsinghua.edu.cn_macports_release_devel_boost176/boost176/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

[water137780117]

log of building boost176

[ryandesign (Ryan Carsten Schmidt)]

The log says:

error: 64-bit PPC compilation is not supported when targeting OSX 10.6 or later

which is obviously silly since you're trying to build for arm64 and x86_64.

[ryandesign (Ryan Carsten Schmidt)]

Duplicate of #64954.