Compiling libgpg-error from the git repo fails as
./configure does not complete run because tests/Makefile.in is missing.

configure-output:
...
...
checking for an ANSI C-conforming const... yes
checking whether imported symbols can be declared weak... yes
checking pthread.h usability... yes
checking pthread.h presence... yes
checking for pthread.h... yes
checking for pthread_kill in -lpthread... yes
checking for multithread API to use... posix
checking for pthread_rwlock_t... yes
checking size of pthread_mutex_t... 40
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating po/Makefile.in
config.status: creating m4/Makefile
config.status: creating src/Makefile
config.status: error: cannot find input file: `tests/Makefile.in'

Workaround: use tests/Makefile.in from tar-file (
ftp://ftp.gnupg.org/gcrypt/libgpg-error/)