At least on darwin, using the very latest from gnulib, http://hydra.nixos.org/build/1731154
that shows how grep's gnulib-tests exposed one failure: building test-lock.log /bin/sh: line 1: 69786 Abort trap EXEEXT='' srcdir='.' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_TR_UTF8='none' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_JA='ja_JP.eucJP' LOCALE_ZH_CN='zh_CN.GB18030' LOCALE_TR_UTF8='none' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_JA='ja_JP.eucJP' LOCALE_ZH_CN='zh_CN.GB18030' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_ZH_CN='zh_CN.GB18030' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_JA='ja_JP.eucJP' LOCALE_ZH_CN='zh_CN.GB18030' abs_aux_dir='/private/tmp/nix-build-lhwwksswzz529m3886kh5hppjwwp93dw-grep-2.10.57-0dc6.drv-0/grep-2.10.57-0dc6/build-aux' abs_aux_dir='/private/tmp/nix-build-lhwwksswzz529m3886kh5hppjwwp93dw-grep-2.10.57-0dc6.drv-0/grep-2.10.57-0dc6/build-aux' MAKE='make' LOCALE_FR='fr_FR.ISO8859-1' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_JA='ja_JP.eucJP' LOCALE_ZH_CN='zh_CN.GB18030' "$tst" > test-lock.log-t 2>&1 FAIL: test-lock Sorry, but I can't investigate right now.
