[Pkg-phototools-devel] Bug#986574: darktable FTBFS with DEB_BUILD_OPTIONS=parallel=1

[Helmut Grohne]

Source: darktable
Version: 3.4.0-2
Severity: serious
Tags: ftbfs

darktable fails to build from source when adding parallel=1 to
DEB_BUILD_OPTIONS. Note that this is independent of the number of actual
CPU cores. I suppose that there is a missing dependency relation among
CMake targets. Here is the actual failure:

| [ 25%] Building C object bin/CMakeFiles/lib_darktable.dir/control/conf.c.o
| cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/bin && /usr/bin/cc -DDT_HAVE_SIGNAL_TRACE -DGDK_DISABLE_DEPRECATED -DGDK_VERSION_MIN_REQUIRED=GDK_VERSION_3_22 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_MIN_REQUIRED -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_40 -DGTK_DISABLE_DEPRECATED -DGTK_DISABLE_SINGLE_INCLUDES -DHAVE_BUILTIN_CPU_SUPPORTS -DHAVE_CONFIG_H -DHAVE_GAME -DHAVE_GPHOTO2 -DHAVE_GPHOTO_25_OR_NEWER -DHAVE_GRAPHICSMAGICK -DHAVE_HTTP_SERVER -DHAVE_KWALLET -DHAVE_LENSFUN -DHAVE_LIBSECRET -DHAVE_MAP -DHAVE_OPENCL -DHAVE_OPENEXR -DHAVE_OPENJPEG -DHAVE_OSMGPSMAP_110_OR_NEWER -DHAVE_OSMGPSMAP_NEWER_THAN_110 -DHAVE_PRINT -DHAVE_SQLITE_324_OR_NEWER -DUSE_COLORDGTK -DUSE_LUA -D_RELEASE -D_XOPEN_SOURCE=700 -D__GDK_KEYSYMS_COMPAT_H__ -Dlib_darktable_EXPORTS -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/bin -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>>/src/external/LuaAutoC -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/lib/x86_64-linux-gnu/darktable/rawspeed/src -I/<<PKGBUILDDIR>>/src/external/rawspeed/src/librawspeed -I/<<PKGBUILDDIR>>/src/external/whereami/src -isystem /<<PKGBUILDDIR>>/src/external -isystem /<<PKGBUILDDIR>>/src/external/OpenCL -isystem /<<PKGBUILDDIR>>/src/external/rawspeed/src/external -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/gtk-3.0 -isystem /usr/include/at-spi2-atk/2.0 -isystem /usr/include/at-spi-2.0 -isystem /usr/include/dbus-1.0 -isystem /usr/lib/x86_64-linux-gnu/dbus-1.0/include -isystem /usr/include/gio-unix-2.0 -isystem /usr/include/cairo -isystem /usr/include/pango-1.0 -isystem /usr/include/fribidi -isystem /usr/include/harfbuzz -isystem /usr/include/atk-1.0 -isystem /usr/include/pixman-1 -isystem /usr/include/uuid -isystem /usr/include/freetype2 -isystem /usr/include/libpng16 -isystem /usr/include/gdk-pixbuf-2.0 -isystem /usr/include/libmount -isystem /usr/include/blkid -isystem /usr/include/libxml2 -isystem /usr/include/libsoup-2.4 -isystem /usr/include/OpenEXR -isystem /usr/include/lensfun -isystem /usr/include/librsvg-2.0 -isystem /usr/include/json-glib-1.0 -isystem /usr/include/openjpeg-2.4 -isystem /usr/include/libsecret-1 -isystem /usr/include/GraphicsMagick -isystem /usr/include/lua5.3 -isystem /usr/include/osmgpsmap-1.0 -isystem /usr/include/colord-1 -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -O3 -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -Wformat -Wformat-security -Wshadow -Wtype-limits -Wvla -Wold-style-declaration -Wno-unknown-pragmas -Wno-error=varargs -Wno-format-truncation -Wno-error=address-of-packed-member -std=c99 -fopenmp -mtune=generic -msse2 -g -mfpmath=sse -O3 -DNDEBUG -O3 -fexpensive-optimizations -fPIC -o CMakeFiles/lib_darktable.dir/control/conf.c.o -c /<<PKGBUILDDIR>>/src/control/conf.c
| /<<PKGBUILDDIR>>/src/control/conf.c:27:10: fatal error: conf_gen.h: No such file or directory
|    27 | #include "conf_gen.h"
|       |          ^~~~~~~~~~~~
| compilation terminated.
| make[3]: *** [bin/CMakeFiles/lib_darktable.dir/build.make:1118: bin/CMakeFiles/lib_darktable.dir/control/conf.c.o] Error 1
| make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
| make[2]: *** [CMakeFiles/Makefile2:1787: bin/CMakeFiles/lib_darktable.dir/all] Error 2
| make[2]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
| make[1]: *** [Makefile:174: all] Error 2
| make[1]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
| dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j1 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
| make: *** [debian/rules:20: build] Error 25
| dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2

Helmut