kc3-lang/automake/t/lex-pr204.sh

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• Hash : c2a52bf0
  Author :
  Date : 2012-06-24T10:36:15
  

  tests: simpler workaround for shells losing the exit status in exit trap
  
  Now that we can assume our tests are run by a decent POSIX shell, we
  can simplify our workaround aimed at having the exit status propagated
  correctly to the code in the exit trap.  Unfortunately, we cannot
  dispense with such a workaround altogether, because it's still required
  by some shells we need to support (at least Solaris 10 /bin/ksh and
  /usr/xpg4/bin/sh).
  
  For more information about the need of that workaround, see the entry
  about 'trap' in the section "Limitations of Shell Builtins" in the
  Autoconf manual:
  <http://www.gnu.org/software/autoconf/manual/autoconf.html#trap>
  
  The new workaround has been tested successfully with the following
  shells:
  
    - Bash 4.1
    - Bash 3.2
    - Bash 3.0
    - Bash 2.05b
    - dash 0.5.5.1
    - dash 0.5.2
    - AT&T Ksh 93u (from official Debian package)
    - MirBSD Korn Shell 40.2 (from official Debian package)
    - Solaris 9, 10 and 11 /bin/ksh
    - Solaris 9, 10 and 11 /usr/xpg4/bin/sh
    - NetBSD 5.1 /bin/sh
    - NetBSD 5.1 /bin/ksh
  
  * t/ax/test-init.sh (Exit): Rename ...
  (_am_exit): ... like this.
  (exit): New alias for '_am_exit'.  We cannot simply redefine 'exit'
  as a shell function, because some shells (dash 0.5.5.1, Solaris 10
  /bin/ksh and /usr/xpg4/bin/sh) do not allow it.
  (_am_exit, trap): Add extra escaping for 'exit' calls, to ensure we
  really invoke the 'exit' builtin and not our alias with the same
  name.
  * configure.ac: Check that the shell selected to run our testsuite
  supports aliases named like shell builtins.
  * t/REAMDE: Adjust.
  * All tests: Adjust, by simply using 'exit' instead of 'Exit'.
  * t/self-check-explicit-skips.sh: Adjust: the first usage of 'exit'
  after it has been redefined as an alias must be on a new line w.r.t.
  that where the alias is defined, in order for the redefinition to be
  honored.
  * syntax-checks.mk (sc_tests_Exit_not_exit): Delete.
  (sc_tests_exit_not_Exit): New.
  (syntax_check_rules): Adjust.
  (sc_tests_automake_fails): Simplify the recipe a little.
  * Several tests: Remove now useless spurious quoting once required
  to placate the 'sc_tests_Exit_not_exit' maintainer check.
  * gen-testsuite-part: Likewise.  Also, avoid uses of 'Exit' in the
  generated scripts.
  
  Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
  

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• t/lex-pr204.sh

• #! /bin/sh
  # Copyright (C) 2011-2012 Free Software Foundation, Inc.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation; either version 2, or (at your option)
  # any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  # Related to PR 204.
  # C sources derived from nodist_ lex sources should not be distributed.
  # See also related test 'lex-nodist.test'.
  # The tests 'yacc-nodist.test' and 'yacc-pr204.test' does similar checks
  # for yacc-generated .c and .h files.
  
  required='cc lex'
  . ./defs || exit 1
  
  cat >> configure.ac <<'EOF'
  AM_MAINTAINER_MODE
  AC_PROG_CC
  dnl We use AC_PROG_LEX deliberately.
  dnl Sister 'lex-nodist.test' should use 'AM_PROG_LEX' instead.
  AC_PROG_LEX
  AC_OUTPUT
  EOF
  
  # The LEXER2 intermediate variable is there to make sure Automake
  # matches 'nodist_' against the right variable name...
  cat > Makefile.am << 'EOF'
  EXTRA_PROGRAMS = foo
  LEXER2 = lexer2.l
  nodist_foo_SOURCES = lexer.l $(LEXER2)
  
  distdirtest: distdir
  	test ! -f $(distdir)/lexer.c
  	test ! -f $(distdir)/lexer.l
  	test ! -f $(distdir)/lexer.h
  	test ! -f $(distdir)/lexer2.c
  	test ! -f $(distdir)/lexer2.l
  	test ! -f $(distdir)/lexer2.h
  EOF
  
  cat > lexer.l << 'END'
  %{
  #define YY_NO_UNISTD_H 1
  %}
  %%
  "GOOD"   return EOF;
  .
  %%
  int main (void)
  {
    return yylex ();
  }
  END
  
  cp lexer.l lexer2.l
  
  $ACLOCAL
  $AUTOCONF
  $AUTOMAKE -a
  
  ./configure
  $MAKE distdirtest
  
  # Make sure lexer.c and lexer2.c are still targets.
  $MAKE lexer.c lexer2.c
  test -f lexer.c
  test -f lexer2.c
  
  # Ensure the rebuild rule works despite AM_MAINTAINER_MODE, because
  # it's a nodist_ lexer.
  $sleep
  touch lexer.l lexer2.l
  $sleep
  $MAKE lexer.c lexer2.c
  is_newest lexer.c lexer.l
  is_newest lexer2.c lexer2.l
  
  :
  

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