Hi Barry, Le 16 oct. 2018 A 15:41, Barry Davis <barry_da...@stormagic.com> a A(c)crit : Bison runs M4. It adds BISON_PKGDATADIR to the search path for M4 and launches M4 to run on m4sugar/m4sugar.m4. m4sugar includes m4sugar/foreach.m4 which is found on M4s search path. Somewhere along the line we include c.m4 which includes b4_pkgdatadir/[c-like.m4], but M4 doesn't know the b4_pkgdatadir variable and so fails to include.
Yes, it does. It is given to m4 via stdin. $ ln -s data hello-world $ BISON_PKGDATADIR=hello-world /opt/local/bin/bison aEUR"trace=m4 /tmp/foo.y |& grep b4_pkgdatadir m4trace:stdin:315: -1- id 3238: m4_define([b4_pkgdatadir], [[hello-world]]) -> ??? m4trace:hello-world/c-skel.m4:21: -1- id 3879: b4_glr_if([m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])]) -> ??? m4trace:hello-world/c-skel.m4:21: -1- id 3879: b4_glr_if(...) -> [b4_flag_if([glr], [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])], [])] m4trace:hello-world/c-skel.m4:21: -1- id 3880: b4_flag_if([glr], [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])], []) -> ??? [1], [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])], m4trace:hello-world/c-skel.m4:21: -1- id 3881: m4_case([0], [0], [], [1], [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])], [m4_fatal([invalid glr value: ]b4_glr_flag)]) -> ??? [_m4_case])]m4_dquote($m4_eval([(6 + 1) & ~1]))[)])_m4_case([0],[0],[],[1],[m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])],[m4_fatal([invalid glr value: ]b4_glr_flag)])])] [_m4_case])]m4_dquote($m4_eval([(6 + 1) & ~1]))[)])_m4_case([0],[0],[],[1],[m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])],[m4_fatal([invalid glr value: ]b4_glr_flag)])]) -> ??? [_m4_case])]m4_dquote($m4_eval([(6 + 1) & ~1]))[)])_m4_case([0],[0],[],[1],[m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])],[m4_fatal([invalid glr value: ]b4_glr_flag)])] aEUR| This is used extensively by the test suite to check a non-installed bison. I've seen this building krb5-1.16.1 in a cross environment where bison-3.1 is installed and ran from a staging area with the environment variables M4 and BISON_PKGDATADIR set. Was it set to the appropriate value? Could you provide us with more details about that?