clisp @2.49.92: configure: error: C compiler cannot create executables

[pxr02411]

--->  Verifying checksums for clisp
--->  Checksumming clisp-2.49.92.tar.bz2
--->  Extracting clisp
--->  Extracting clisp-2.49.92.tar.bz2
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_clisp/clisp/work" && /usr/bin/bzip2 -dc '/opt/local/var/macports/distfiles/clisp/clisp-2.49.92.tar.bz2' | /usr/bin/tar -xf - 
--->  Configuring clisp
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_clisp/clisp/work/clisp-2.49.92" && ./configure --prefix=/opt/local --with-libiconv-prefix=/opt/local --with-libreadline-prefix=/opt/local --with-libsigsegv-prefix=/opt/local --without-ffcall --disable-rpath 
executing ../src/configure --prefix=/opt/local --with-libiconv-prefix=/opt/local --with-libreadline-prefix=/opt/local --with-libsigsegv-prefix=/opt/local --without-ffcall --disable-rpath
configure: creating cache config.cache
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... build-aux/install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
configure: ** check for host type
checking build system type... x86_64-apple-darwin20.2.0
checking host system type... x86_64-apple-darwin20.2.0
checking how to remove colons from paths... echo $x
configure: ** checks for programs
checking for gcc... /usr/bin/clang -arch x86_64
checking whether the C compiler works... no
configure: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_clisp/clisp/work/clisp-2.49.92/src':
configure: error: C compiler cannot create executables
See `config.log' for more details
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_clisp/clisp/work/clisp-2.49.92" && ./configure --prefix=/opt/local --with-libiconv-prefix=/opt/local --with-libreadline-prefix=/opt/local --with-libsigsegv-prefix=/opt/local --without-ffcall --disable-rpath 
Exit code: 77
Error: Failed to configure clisp: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_clisp/clisp/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port clisp failed

[ryandesign (Ryan Carsten Schmidt)]

Please attach the config.log file so that we can see what went wrong. I suspect that implicit function declarations are at least part of the problem.

[pxr02411]

I have attached the config.log. Thank you.

[jmroot (Joshua Root)]

Looks like your Command Line Tools might be outdated, possibly as a result of the issue described in wiki:ProblemHotlist#reinstall-clt.

[pxr02411]

Thank you very much. Reinstalling Command Line Tools solved the problem. It seems that inconsistency occurs if xcode is updated to v.12.3 before updating OS to Big Sur.