I just installed Macports from scratch, and one of the first things I did was to reinstall texmacs.
(I probably have the wrong version of gcc installed because Xcode likes doing things like that)
:info:build cd src; /usr/bin/make -f makefile link=shared
:info:build make[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_editors_TeXmacs/TeXmacs/work/TeXmacs-1.0.7.10-src/src'
:info:build /usr/bin/clang++ -ISystem -ISystem/Boot -ISystem/Classes -ISystem/Files -ISystem/Link -ISystem/Misc -ISystem/Language -IKernel/Abstractions -IKernel/Containers -IKernel/Types -IData/Convert -IData/Drd -IData/History -IData/Observers -IData/String -IData/Tmfs -IData/Tree -IGuile -IGraphics/Bitmap_fonts -IGraphics/Fonts -IGraphics/Gui -IGraphics/Mathematics -IGraphics/Renderer -IPlugins -ITypeset -ITypeset/Bridge -ITypeset/Concat -ITypeset/Page -IEdit -I/opt/local/include -I/opt/local/include/freetype2 -I/opt/local/include -I/opt/local/include -I/opt/local/include -D_THREAD_SAFE -I/opt/local/include -DX11TEXMACS -Wall -Wno-return-type -O2 -fno-rtti -fno-exceptions -I/opt/local/include -pipe -Os -arch x86_64 -c ./Typeset/Bridge/bridge_with.cpp -o Objects/bridge_with.o
:info:build /usr/bin/clang++ -ISystem -ISystem/Boot -ISystem/Classes -ISystem/Files -ISystem/Link -ISystem/Misc -ISystem/Language -IKernel/Abstractions -IKernel/Containers -IKernel/Types -IData/Convert -IData/Drd -IData/History -IData/Observers -IData/String -IData/Tmfs -IData/Tree -IGuile -IGraphics/Bitmap_fonts -IGraphics/Fonts -IGraphics/Gui -IGraphics/Mathematics -IGraphics/Renderer -IPlugins -I/opt/local/include -I/opt/local/include/freetype2 -I/opt/local/include -I/opt/local/include -I/opt/local/include -D_THREAD_SAFE -I/opt/local/include -DX11TEXMACS -Wall -Wno-return-type -O2 -fno-rtti -fno-exceptions -I/opt/local/include -pipe -Os -arch x86_64 -c ./Plugins/Cairo/cairo_renderer.cpp -o Objects/cairo_renderer.o
:info:build /usr/bin/clang++ -ISystem -ISystem/Boot -ISystem/Classes -ISystem/Files -ISystem/Link -ISystem/Misc -ISystem/Language -IKernel/Abstractions -IKernel/Containers -IKernel/Types -IData/Convert -IData/Drd -IData/History -IData/Observers -IData/String -IData/Tmfs -IData/Tree -IGuile -IGraphics/Bitmap_fonts -IGraphics/Fonts -IGraphics/Gui -IGraphics/Mathematics -IGraphics/Renderer -IPlugins -I/opt/local/include -I/opt/local/include/freetype2 -I/opt/local/include -I/opt/local/include -I/opt/local/include -D_THREAD_SAFE -I/opt/local/include -DX11TEXMACS -Wall -Wno-return-type -O2 -fno-rtti -fno-exceptions -I/opt/local/include -pipe -Os -arch x86_64 -c ./Plugins/Widkit/Scrollable/canvas_widget.cpp -o Objects/canvas_widget.o
:info:build /usr/bin/clang++ -ISystem -ISystem/Boot -ISystem/Classes -ISystem/Files -ISystem/Link -ISystem/Misc -ISystem/Language -IKernel/Abstractions -IKernel/Containers -IKernel/Types -IData/Convert -IData/Drd -IData/History -IData/Observers -IData/String -IData/Tmfs -IData/Tree -IGuile -IGraphics/Bitmap_fonts -IGraphics/Fonts -IGraphics/Gui -IGraphics/Mathematics -IGraphics/Renderer -IPlugins -ITypeset -ITypeset/Bridge -ITypeset/Concat -ITypeset/Page -IEdit -I/opt/local/include -I/opt/local/include/freetype2 -I/opt/local/include -I/opt/local/include -I/opt/local/include -D_THREAD_SAFE -I/opt/local/include -DX11TEXMACS -Wall -Wno-return-type -O2 -fno-rtti -fno-exceptions -I/opt/local/include -pipe -Os -arch x86_64 -c ./Typeset/Table/cell.cpp -o Objects/cell.o
:info:build ./Typeset/Bridge/bridge_with.cpp:129:3: error: variable length array of non-POD element type 'string'
:info:build STACK_NEW_ARRAY(vars,string,k);
:info:build ^
:info:build Kernel/Abstractions/basic.hpp:55:44: note: expanded from macro 'STACK_NEW_ARRAY'
:info:build #define STACK_NEW_ARRAY(name,T,size) T name[size]
:info:build ^
:info:build ./Typeset/Bridge/bridge_with.cpp:130:3: error: variable length array of non-POD element type 'tree'
:info:build STACK_NEW_ARRAY(newv,tree,k);
:info:build ^
:info:build Kernel/Abstractions/basic.hpp:55:44: note: expanded from macro 'STACK_NEW_ARRAY'
:info:build #define STACK_NEW_ARRAY(name,T,size) T name[size]
:info:build ^
:info:build ./Typeset/Bridge/bridge_with.cpp:161:3: error: variable length array of non-POD element type 'string'
:info:build STACK_NEW_ARRAY(vars,string,k);
:info:build ^
:info:build Kernel/Abstractions/basic.hpp:55:44: note: expanded from macro 'STACK_NEW_ARRAY'
:info:build #define STACK_NEW_ARRAY(name,T,size) T name[size]
:info:build ^
:info:build ./Typeset/Bridge/bridge_with.cpp:162:3: error: variable length array of non-POD element type 'tree'
:info:build STACK_NEW_ARRAY(oldv,tree,k);
:info:build ^
:info:build Kernel/Abstractions/basic.hpp:55:44: note: expanded from macro 'STACK_NEW_ARRAY'
:info:build #define STACK_NEW_ARRAY(name,T,size) T name[size]
:info:build ^
:info:build ./Typeset/Bridge/bridge_with.cpp:163:3: error: variable length array of non-POD element type 'tree'
:info:build STACK_NEW_ARRAY(newv,tree,k);
:info:build ^
:info:build Kernel/Abstractions/basic.hpp:55:44: note: expanded from macro 'STACK_NEW_ARRAY'
:info:build #define STACK_NEW_ARRAY(name,T,size) T name[size]
:info:build ^