kc3-lang/automake/t/yflags-force-conditional.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/yflags-force-conditional.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/>.
  
  # Check that the user can force automake to use *_YFLAGS variables
  # which have conditional content.
  
  . ./defs || exit 1
  
  cat >> configure.ac <<'END'
  AC_SUBST([CC], [false])
  AC_PROG_YACC
  AM_CONDITIONAL([COND], [test x"$cond" = x"yes"])
  AC_OUTPUT
  END
  
  mkdir bin
  cat > bin/fake-yacc <<'END'
  #!/bin/sh
  echo "/* $* */" > y.tab.c
  echo 'extern int dummy;' >> y.tab.c
  END
  chmod a+x bin/fake-yacc
  PATH=$(pwd)/bin$PATH_SEPARATOR$PATH; export PATH
  YACC=fake-yacc; export YACC
  
  cat > Makefile.am <<'END'
  AUTOMAKE_OPTIONS = no-dependencies
  bin_PROGRAMS = foo bar
  foo_SOURCES = foo.y main.c
  bar_SOURCES = $(foo_SOURCES)
  bar_YFLAGS = $(bar_yflags2)
  if COND
  AM_YFLAGS = __am_cond_yes__
  bar_YFLAGS += __bar_cond_yes__
  else !COND
  AM_YFLAGS = __am_cond_no__
  bar_yflags2 = __bar_cond_no__
  endif !COND
  END
  
  : > foo.y
  
  $ACLOCAL
  $AUTOCONF
  $AUTOMAKE -a -Wno-unsupported
  
  $EGREP '(YFLAGS|yflags|am__append)' Makefile.in # For debugging.
  
  ./configure cond=yes
  $MAKE foo.c bar-foo.c
  
  cat foo.c
  cat bar-foo.c
  
  $FGREP ' __am_cond_yes__ ' foo.c
  $FGREP ' __bar_cond_yes__ ' bar-foo.c
  $FGREP 'cond_no' foo.c bar-foo.c && exit 1
  
  $MAKE maintainer-clean
  ls -l
  
  ./configure cond=no
  $MAKE foo.c bar-foo.c
  
  cat foo.c
  cat bar-foo.c
  
  $FGREP ' __am_cond_no__ ' foo.c
  $FGREP ' __bar_cond_no__ ' bar-foo.c
  $FGREP 'cond_yes' foo.c bar-foo.c && exit 1
  
  :
  

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