Source: gcin Version: 2.8.5+dfsg1-2 Severity: serious Tags: patch 2.8.5+dfsg1-2 bumps dh compat to 10, and one change in compat 10 is that it defaults to --parallel.
This causes frequent FTBFS: https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gcin.html ... gcc -Wl,-rpath,/usr/lib/x86_64-linux-gnu/gcin -o sim2trad sim2trad.o util.o gcin2.so locale.o gcin-conf.o gcin-icon.o -Wl,-z,relro -Wl,--as-needed -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype -lX11 -ldl -lm /usr/bin/ld: cannot find -lgcin-im-client collect2: error: ld returned 1 exit status Makefile:125: recipe for target 'tslearn' failed make[1]: *** [tslearn] Error 1 I can reproduce this with "dpkg-buildpackage -b -J100". The proper fix would be to fix the dependencies in the Makefiles, but a workaround is to go back to non-parallel building with: --- debian/rules.old 2017-07-09 11:20:03.000000000 +0000 +++ debian/rules 2017-07-09 11:20:28.000000000 +0000 @@ -13,7 +13,7 @@ GTK3_IMMODULES := $(shell pkg-config --variable=libdir gtk+-3.0)/libgtk-3-0/gtk-query-immodules-3.0 %: - dh $@ + dh $@ --no-parallel override_dh_auto_configure: dh_auto_configure -- --gcinlibdir=/usr/lib/$(DEB_HOST_MULTIARCH)/gcin