[FYI] {maint} tests defs: allow requirements for compilers (mostly dummy)

[Stefano Lattarini]

Most of the new requirements that are now accepted in `$required'
as consequence of this patch are still dummy.  They are planned
to be implemented only in master (or in some derived branch), but
having them here (even just as no-op) will allow for an easier
integration/backporting of potential new testcases.

* tests/defs.in (cc, c++, fortran, fortran77): New requirements,
still dummy.
(flex): New requirement, picking LEX for configure.
(lex): New requirement, alias for `flex'.  A more appropriate
implementation, looking for a generic `lex' program, will follow
in the future.
(yacc): New requirement, alias for `bison'.  A more appropriate
implementation, looking for a generic `yacc' program, will follow
in the future.
---
 ChangeLog     |   18 ++++++++++++++++++
 tests/defs.in |   12 +++++++++++-
 2 files changed, 29 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 99e4f11..3d87b6b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2011-05-04  Stefano Lattarini  <address@hidden>
+
+       tests defs: allow requirements for compilers (mostly dummy)
+       Most of the new requirements that are now accepted in `$required'
+       as consequence of this patch are still dummy.  They are planned
+       to be implemented only in master (or in some derived branch), but
+       having them here (even just as no-op) will allow for an easier
+       integration/backporting of potential new testcases.
+       * tests/defs.in (cc, c++, fortran, fortran77): New requirements,
+       still dummy.
+       (flex): New requirement, picking LEX for configure.
+       (lex): New requirement, alias for `flex'.  A more appropriate
+       implementation, looking for a generic `lex' program, will follow
+       in the future.
+       (yacc): New requirement, alias for `bison'.  A more appropriate
+       implementation, looking for a generic `yacc' program, will follow
+       in the future.
+
 2011-04-24  Stefano Lattarini  <address@hidden>
 
        tests: fix spurious failure in a test on TESTS (VPATH-related)
diff --git a/tests/defs.in b/tests/defs.in
index 4e0db16..8f9534e 100644
--- a/tests/defs.in
+++ b/tests/defs.in
@@ -153,13 +153,23 @@ do
   # Check that each required tool is present.
   case $tool in
     :) ;;
-    bison)
+    bison|yacc)
       # Since bison is required, we pick YACC for ./configure.
       YACC='bison -y'
       export YACC
       echo "$me: running bison --version"
       ( bison --version ) || exit 77
       ;;
+    flex|lex)
+      # Since flex is required, we pick LEX for ./configure.
+      LEX=flex
+      export LEX
+      echo "$me: running flex --version"
+      flex --version || exit 77
+      ;;
+    cc|c++|fortran|fortran77)
+      echo "$me: dummy requirement '$tool', no check done"
+      ;;
     bzip2)
       # Do not use --version, bzip2 still tries to compress stdin.
       echo "$me: running bzip2 --help"
-- 
1.7.2.3