When I try to build version 0.8.5 I get the following error. With version 0.8.4 I had no problems.
make[2]: Entering directory `/home/alex/Download/gnash-0.8.5/libbase'
/bin/sh ../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I.. -DPLUGINSDIR=\"/usr/local/lib/gnash/plugins\" -DSYSCONFDIR=\"/usr/local/etc\" -I../libnet -I../libamf -I../libcore -I../libcore/swf -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -pthread -I/usr/include/gstreamer-0.10 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/libxml2 -I../libltdl -g -O2 -pthread -pthread -W -Wall -Wcast-align -Wcast-qual -Wpointer-arith -Wreturn-type -Wnon-virtual-dtor -Wunused -fvisibility-inlines-hidden -MT libgnashbase_la-extension.lo -MD -MP -MF .deps/libgnashbase_la-extension.Tpo -c -o libgnashbase_la-extension.lo `test -f 'extension.cpp' || echo './'`extension.cpp
../libtool: line 847: X--tag=CXX: command not found
../libtool: line 880: libtool: ignoring unknown tag : command not found
../libtool: line 847: X--mode=compile: command not found
../libtool: line 1014: *** Warning: inferring the mode of operation is deprecated.: command not found
../libtool: line 1015: *** Future versions of Libtool will require --mode=MODE be specified.: command not found
../libtool: line 1158: Xg++: command not found
../libtool: line 1158: X-DHAVE_CONFIG_H: command not found
../libtool: line 1158: X-I.: command not found
../libtool: line 1158: X-I..: command not found
../libtool: line 1158: X-DPLUGINSDIR="/usr/local/lib/gnash/plugins": No such file or directory
../libtool: line 1158: X-DSYSCONFDIR="/usr/local/etc": No such file or directory
../libtool: line 1158: X-I../libnet: No such file or directory
../libtool: line 1158: X-I../libamf: No such file or directory
../libtool: line 1158: X-I../libcore: No such file or directory
../libtool: line 1158: X-I../libcore/swf: No such file or directory
../libtool: line 1158: X-pthread: command not found
../libtool: line 1158: X-I/usr/include/glib-2.0: No such file or directory
../libtool: line 1158: X-I/usr/lib/glib-2.0/include: No such file or directory
../libtool: line 1158: X-pthread: command not found
../libtool: line 1158: X-I/usr/include/gstreamer-0.10: No such file or directory
../libtool: line 1158: X-I/usr/include/glib-2.0: No such file or directory
../libtool: line 1158: X-I/usr/lib/glib-2.0/include: No such file or directory
../libtool: line 1158: X-I/usr/include/libxml2: No such file or directory
../libtool: line 1158: X-I../libltdl: No such file or directory
../libtool: line 1158: X-g: command not found
../libtool: line 1158: X-O2: command not found
../libtool: line 1158: X-pthread: command not found
../libtool: line 1158: X-pthread: command not found
../libtool: line 1158: X-W: command not found
../libtool: line 1158: X-Wall: command not found
../libtool: line 1158: X-Wcast-align: command not found
../libtool: line 1158: X-Wcast-qual: command not found
../libtool: line 1158: X-Wpointer-arith: command not found
../libtool: line 1158: X-Wreturn-type: command not found
../libtool: line 1158: X-Wnon-virtual-dtor: command not found
../libtool: line 1158: X-Wunused: command not found
../libtool: line 1158: X-fvisibility-inlines-hidden: command not found
../libtool: line 1158: X-MT: command not found
../libtool: line 1158: Xlibgnashbase_la-extension.lo: command not found
../libtool: line 1158: X-MD: command not found
../libtool: line 1158: X-MP: command not found
../libtool: line 1158: X-MF: command not found
../libtool: line 1158: X.deps/libgnashbase_la-extension.Tpo: No such file or directory
../libtool: line 1158: X-c: command not found
../libtool: line 1211: Xlibgnashbase_la-extension.lo: command not found
../libtool: line 1216: libtool: compile: cannot determine name of library object from `': command not found