Probably SDK error when installing a package

[mengqiz]

Hello,

I tried to install gnuplot and related packages using macports 2.7.1 on my Macbook (Big Sur 11.5.2 with MacOSX11.1.sdk. Note that I just download the MacOSX11.1.sdk from internet and moved it to /Library/Developer/CommandLineTools/SDKs. I didn't do anything linking(? or do I have to?)). The following is the output. I have also attached the two log files mentioned below. Please have a look. May I ask how can I solve it? Thank you.

sudo port install gnuplot imagemagick libav-tools smpeg-plaympeg
---> Computing dependencies for gnuplot
The following dependencies will be installed:

Xft2 fribidi gd2 graphite2 harfbuzz libcaca libcerf lua pango pkgconfig wxWidgets-3.0 wxWidgets-common wxWidgets_select

Continue? [Y/n]:
---> Fetching archive for gd2
---> Attempting to fetch gd2-2.3.2_0+x11.darwin_20.x86_64.tbz2 from ​https://packages.macports.org/gd2
---> Attempting to fetch gd2-2.3.2_0+x11.darwin_20.x86_64.tbz2 from ​http://jog.id.packages.macports.org/macports/packages/gd2
---> Attempting to fetch gd2-2.3.2_0+x11.darwin_20.x86_64.tbz2 from ​https://pek.cn.packages.macports.org/macports/packages/gd2
---> Configuring gd2
Error: Failed to configure gd2: consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_gd2/gd2/work/libgd-2.3.2/config.log
Error: Failed to configure gd2: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_gd2/gd2/main.log for details.
Error: Follow ​https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port gnuplot failed