By default Debian dh passes --disable-dependacy-tracking when building. If the package rules also adds --builddirectory to use out of source builds (eg. "dh $@ --builddirectory=build --parallel --with autoreconf"), and the package happens to be using subdir-objects automake option and generated source files from lex/yacc then the build will fail.
Eg. mkdir build ../configure --disable-dependency-tracking --disable-silent-rules make /bin/bash ../ylwrap ../src/scanner.ll lex.yy.c src/scanner.cc -- flex ../ylwrap: line 206: ../src/scanner.cc: No such file or directory Makefile:422: recipe for target 'src/scanner.cc' failed make: *** [src/scanner.cc] Error 1 A simple patch to lex.am and yacc.am fixes this.
>From bd6971224f304c8f5951afca620f33c25248b446 Mon Sep 17 00:00:00 2001 From: Nicholas Brown <bro...@brocade.com> Date: Fri, 4 Dec 2015 10:49:18 +0000 Subject: [PATCH] yacc and lex built objects without dependancy tracking --- lib/am/lex.am | 1 + lib/am/yacc.am | 1 + 2 files changed, 2 insertions(+) diff --git a/lib/am/lex.am b/lib/am/lex.am index d7ddc77..6357507 100644 --- a/lib/am/lex.am +++ b/lib/am/lex.am @@ -23,6 +23,7 @@ endif %?MAINTAINER-MODE% ?GENERIC?%EXT%%DERIVED-EXT%: ?!GENERIC?%OBJ%: %SOURCE% +?SUBDIROBJ? %SILENT%test -d $(dir $@) || $(MKDIR_P) $(dir $@) ?GENERIC? %VERBOSE%$(am__skiplex) $(SHELL) $(YLWRAP) %SOURCE% $(LEX_OUTPUT_ROOT).c %OBJ% -- %COMPILE% ?!GENERIC? %VERBOSE% \ ?!GENERIC??DIST_SOURCE? $(am__skiplex) \ diff --git a/lib/am/yacc.am b/lib/am/yacc.am index 2b3f92a..2c33023 100644 --- a/lib/am/yacc.am +++ b/lib/am/yacc.am @@ -43,6 +43,7 @@ endif %?FIRST% ?GENERIC?%EXT%%DERIVED-EXT%: ?!GENERIC?%OBJ%: %SOURCE% +?SUBDIROBJ? %SILENT%test -d $(dir $@) || $(MKDIR_P) $(dir $@) ?GENERIC? %VERBOSE%$(am__skipyacc) $(SHELL) $(YLWRAP) %SOURCE% y.tab.c %OBJ% y.tab.h `echo %OBJ% | $(am__yacc_c2h)` y.output %BASE%.output -- %COMPILE% ?!GENERIC? %VERBOSE% \ ?!GENERIC??DIST_SOURCE? $(am__skipyacc) \ -- 2.1.4
