Hi Yutaka, dev.gnupg.org's src/libgcrypt.m4 is mirrored into Gnulib.
Building a recent testdir of all of Gnulib on AIX 7.1, I see this among the output of 'configure': ... checking for gpgrt-config... no ../configure[28123]: --version: not found checking for preferred C# implementation... any ... It looks like the culprit is this commit: https://dev.gnupg.org/rCad3b599462bdbc459f6c7be867e9a12ab46481b3 Suggestion: Change lines 93 and 97 gpg_error_config_version=`$GPG_ERROR_CONFIG --version` → gpg_error_config_version=`$GPG_ERROR_CONFIG --version 2>/dev/null` Best regards, Bruno
