"pkg-config --cflags xft" instead of "pkg-config --cflags freetype2", updated debdiff is attached.
cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed
diff -Nru tetraproc-0.8.2/debian/changelog tetraproc-0.8.2/debian/changelog --- tetraproc-0.8.2/debian/changelog 2012-05-20 19:06:30.000000000 +0300 +++ tetraproc-0.8.2/debian/changelog 2019-01-11 13:26:32.000000000 +0200 @@ -1,3 +1,10 @@ +tetraproc (0.8.2-2.1) unstable; urgency=medium + + * Non-maintainer upload. + * Fix build without freetype-config. (Closes: #916183) + + -- Adrian Bunk <b...@debian.org> Fri, 11 Jan 2019 13:26:32 +0200 + tetraproc (0.8.2-2) unstable; urgency=low * libpng12-dev -> libpng-dev (Closes: #662519) diff -Nru tetraproc-0.8.2/debian/patches/no-freetype-config.patch tetraproc-0.8.2/debian/patches/no-freetype-config.patch --- tetraproc-0.8.2/debian/patches/no-freetype-config.patch 1970-01-01 02:00:00.000000000 +0200 +++ tetraproc-0.8.2/debian/patches/no-freetype-config.patch 2019-01-11 13:26:32.000000000 +0200 @@ -0,0 +1,15 @@ +Description: freetype-config was removed, use pkg-config instead +Author: Adrian Bunk <b...@debian.org> +Bug-Debian: https://bugs.debian.org/916183 + +--- tetraproc-0.8.2.orig/source/Makefile ++++ tetraproc-0.8.2/source/Makefile +@@ -35,7 +35,7 @@ TETRAPROC_O = tetraproc.o styles.o mainw + hpfilt.o pmfilt.o textmat.o confwin.o abconfig.o abprocess.o oscform.o impdata.o kmeter.o \ + kmeterdsp.o png2img.o + +-tetraproc: CPPFLAGS += -I/usr/X11R6/include `freetype-config --cflags` ++tetraproc: CPPFLAGS += -I/usr/X11R6/include `pkg-config --cflags xft` + tetraproc: LDLIBS += -pthread -lsndfile -lfftw3f -lclxclient -lclthreads -ljack -lpng -lXft -lX11 -lrt + tetraproc: LDFLAGS += -L/usr/X11R6/lib + tetraproc: $(TETRAPROC_O) diff -Nru tetraproc-0.8.2/debian/patches/series tetraproc-0.8.2/debian/patches/series --- tetraproc-0.8.2/debian/patches/series 2012-05-20 19:04:33.000000000 +0300 +++ tetraproc-0.8.2/debian/patches/series 2019-01-11 13:26:32.000000000 +0200 @@ -1 +1,2 @@ 01-makefile.patch +no-freetype-config.patch