[FYI] {master} tests: avoid spurious failures when awk is "traditional awk"

[Stefano Lattarini]

* tests/Makefile.am (do_subst): Also substitute '@AWK@'.
* tests/defs-static.in ($AWK): New, user-overridable and defaulting
to the substituted '@AWK@'.
* tests/defs (fetch_tap_driver): When the shell+awk implementation
of the TAP driver is required, export AM_TAP_AWK to point to a
properly capable awk, since the default awk might be a "traditional"
implementation, which won't be enough for our driver.  This is the
right fix, since a proper setting of AM_TAP_AWK in the driver's
environment is expected (and documented to be required) in real
world uses of 'tap-driver.sh'.
---
 tests/Makefile.am    |    1 +
 tests/defs           |    1 +
 tests/defs-static.in |    1 +
 3 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/tests/Makefile.am b/tests/Makefile.am
index b6d41c7..c14a390 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -136,6 +136,7 @@ do_subst = sed \
   -e 's|@address@hidden|$(APIVERSION)|g' \
   -e 's|@address@hidden|$(PATH_SEPARATOR)|g' \
   -e 's|@address@hidden|$(SHELL)|g' \
+  -e 's|@address@hidden|$(AWK)|g' \
   -e 's|@address@hidden|$(PERL)|g' \
   -e 's|@address@hidden|$(EGREP)|g' \
   -e 's|@address@hidden|$(FGREP)|g' \
diff --git a/tests/defs b/tests/defs
index 5b7ff5b..14648f5 100644
--- a/tests/defs
+++ b/tests/defs
@@ -657,6 +657,7 @@ fetch_tap_driver ()
       sed "1s|#!.*|#! $PERL -w|" "$am_scriptdir"/tap-driver.pl >tap-driver
       ;;
     shell)
+      AM_TAP_AWK=$AWK; export AM_TAP_AWK
       sed "1s|#!.*|#! $SHELL|" "$am_scriptdir"/tap-driver.sh >tap-driver
       ;;
     *)
diff --git a/tests/defs-static.in b/tests/defs-static.in
index 80cd1fe..1ada923 100644
--- a/tests/defs-static.in
+++ b/tests/defs-static.in
@@ -142,6 +142,7 @@ SHELL=${AM_TESTSUITE_SHELL-'@SHELL@'}; export SHELL
 
 # User can override various tools used.  Prefer overriding specific for
 # that automake testsuite, if they are available.
+AWK=${AM_TESTSUITE_AWK-${AWK-'@AWK@'}}
 PERL=${AM_TESTSUITE_PERL-${PERL-'@PERL@'}}
 MAKE=${AM_TESTSUITE_MAKE-${MAKE-'make'}}
 YACC=${AM_TESTSUITE_YACC-${YACC-'@YACC@'}}
-- 
1.7.9