gcl-2.6.7 build failure

[chasrmartin@…]

OS/X 10.5.2 ppc

~ # port install GCL
--->  Building gcl with target all
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_gcl/work/gcl-2.6.7" && make all " returned error 2
Command output: (cd bin; make all)
make[1]: Nothing to be done for `all'.
make mpfiles
make[1]: Nothing to be done for `mpfiles'.
rm -f o/cmpinclude.h ; cp h/cmpinclude.h o
(cd o; make all)
gcc  -c -O2 -no-cpp-precomp -Wall -DVOL=volatile -fsigned-char -pipe -O3 -fomit-frame-pointer  -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_gcl/work/gcl-2.6.7/o -I../h -I../gcl-tk main.c  
main.c: In function 'main':
main.c:308: error: storage size of 'estack' isn't known
main.c:308: warning: unused variable 'estack'
make[1]: *** [main.o] Error 1
make: *** [unixport/saved_pre_gcl] Error 2

Error: Status 1 encountered during processing.
~ # 

[jmr@…]

Assigning to maintainer.

[jmr@…]

For posterity, this is a duplicate of #13936.