Hello, This is a related bug noticed on Arch: https://bugs.archlinux.org/task/23283 This is the error when building opencascade, which depends on the ftgl library. make[2]: Entering directory `/home/j/dev/kernel/src/opencascade/ros/adm/make/TKOpenGl' /bin/sh ../../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I../../.. -I/usr//include -I/usr//include/freetype2 -I/usr//include/FTGL -I/usr//include -DHAVE_GL2PS -I../../../inc -I../../../drv/OpenGl -I../../../src/OpenGl -DNDEBUG -DNo_Exception -DCSFDB -DOCC_CONVERT_SIGNALS -DLIN -DLININTEL -D_GNU_SOURCE=1 -O2 -MT OpenGl_FontMgr.lo -MD -MP -MF .deps/OpenGl_FontMgr.Tpo -c -o OpenGl_FontMgr.lo `test -f '../../../src/OpenGl/OpenGl_FontMgr.cxx' || echo './'`../../../src/OpenGl/OpenGl_FontMgr.cxx libtool: compile: g++ -DHAVE_CONFIG_H -I. -I../../.. -I/usr//include -I/usr//include/freetype2 -I/usr//include/FTGL -I/usr//include -DHAVE_GL2PS -I../../../inc -I../../../drv/OpenGl -I../../../src/OpenGl -DNDEBUG -DNo_Exception -DCSFDB -DOCC_CONVERT_SIGNALS -DLIN -DLININTEL -D_GNU_SOURCE=1 -O2 -MT OpenGl_FontMgr.lo -MD -MP -MF .deps/OpenGl_FontMgr.Tpo -c ../../../src/OpenGl/OpenGl_FontMgr.cxx -fPIC -DPIC -o .libs/OpenGl_FontMgr.o In file included from ../../../inc/OpenGl_FontMgr.hxx:26:0, from ../../../src/OpenGl/OpenGl_FontMgr.cxx:18: /usr//include/FTGL/FTFont.h:29:5: warning: #warning This header is deprecated. Please use <FTGL/ftgl.h> from now. ../../../src/OpenGl/OpenGl_FontMgr.cxx:21:23: fatal error: FTLibrary.h: No such file or directory compilation terminated. make[2]: *** [OpenGl_FontMgr.lo] Error 1 make[2]: Leaving directory `/home/j/dev/kernel/src/opencascade/ros/adm/make/TKOpenGl' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/home/j/dev/kernel/src/opencascade/ros/adm/make' make: *** [install-recursive] Error 1 ftgl port details: cat /usr/ports/contrib/ftgl/Pkgfile # Description: Font rendering library for OpenGL # URL: http://homepages.paradise.net.nz/henryj/code/ # Maintainer: Jose V Beneyto, sepen at users dot sourceforge dot net # Packager: Jose V Beneyto, sepen at users dot sourceforge dot net # Depends on: freetype, freeglut name=ftgl version=2.1.3-rc5 release=1 source=(http://download.sourceforge.net/$name/$name-$version.tar.bz2) build() { cd $name-2.1.3~rc5 ./configure --prefix=/usr \ --with-x \ --disable-nls \ --disable-docs \ --disable-static \ --disable-freetypetest make make DESTDIR=$PKG install rm -rf $PKG/usr/share } corresponding package on ubuntu: http://packages.ubuntu.com/hardy/i386/ftgl-dev/filelist