I was about to test parallell GNU APL on our 80-core machine, and discovered someone had reinstalled it with Linux instead of Solaris. The system currently has RedHat 6, so I figured that compiling GNU APL should be a breeze. It wasn't.
g++ -DHAVE_CONFIG_H -I. -I.. -rdynamic -g -O2 -MT UTF8_string.o -MD -MP -MF $depbase.Tpo -c -o UTF8_string.o UTF8_string.cc &&\
mv -f $depbase.Tpo $depbase.Po
UTF8_string.cc: In constructor ‘UTF8_string::UTF8_string(const Value&)’:
UTF8_string.cc:136: error: class ‘UTF8_string’ does not have any field named ‘Simple_string’
make[3]: *** [UTF8_string.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/home/emartenson/src/apl/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/emartenson/src/apl/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/emartenson/src/apl'
make: *** [all] Error 2
The exact same version compiles properly on my Arch Linux workstation.