[fftw-3] libgcc-devel, fail to build in BigSur 11.2 by (11_arm64)

[ecb2c (lee_sw)]

I have no idea for this error. This took for almost 1hr to build "libgcc-devel" with 100% CPUs (8 cores Full running). Please try to solve this, if somebody has interest on it. Thanks.

(base) ~ % sudo port install fftw-3
Password:
Warning: The macOS 11.2 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.
--->  Computing dependencies for fftw-3
The following dependencies will be installed: 
 gcc-devel
 libgcc-devel
Continue? [Y/n]: y
Warning: The macOS 11.2 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.
--->  Fetching archive for libgcc-devel
--->  Attempting to fetch libgcc-devel-11-20210328_0.darwin_20.arm64.tbz2 from http://jog.id.packages.macports.org/macports/packages/libgcc-devel
--->  Attempting to fetch libgcc-devel-11-20210328_0.darwin_20.arm64.tbz2 from https://kmq.jp.packages.macports.org/libgcc-devel
--->  Attempting to fetch libgcc-devel-11-20210328_0.darwin_20.arm64.tbz2 from https://ywg.ca.packages.macports.org/mirror/macports/packages/libgcc-devel
--->  Building libgcc-devel
Error: Failed to build libgcc-devel: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc-devel/libgcc-devel/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port fftw-3 failed