dnl testsuite, so also use 'no-dependencies' and 'no-define' among
dnl the automake options to avoid bloating and potential problems.
AM_INIT_AUTOMAKE([dist-xz filename-length-max=99 color-tests
- parallel-tests silent-rules no-define no-dependencies])
+ no-define no-dependencies])
## Keep this on a line of its own, since it must be found and processed
-## by the 'update-copyright' rule in out Makefile.
+## by the 'update-copyright' rule in our Makefile.
RELEASE_YEAR=2012
AC_SUBST([RELEASE_YEAR])
# following tests, but some users were unable to figure out that their
# installation was broken since --version appeared to work.
-required_autoconf_version=2.62
+required_autoconf_version=2.65
AC_CACHE_CHECK([whether autoconf is installed], [am_cv_autoconf_installed],
[if AM_RUN_LOG([$am_AUTOCONF --version]);
then
esac
AC_SUBST([MODIFICATION_DELAY])
-# Test for things needed by the test suite.
+## ------------------------------------------- ##
+## Test for things needed by the test suite. ##
+## ------------------------------------------- ##
+
AC_PROG_EGREP
AC_PROG_FGREP
-AC_CACHE_CHECK([whether $SHELL has working 'set -e' with exit trap],
-[am_cv_sh_errexit_works],
-[if $SHELL -ec "trap 'exit \$?' 0; (exit 77); exit 77"; test $? = 77
-then
- am_cv_sh_errexit_works=yes
+dnl FIXME: could we extract this in a simpler way through autoconf
+dnl FIXME: idioms or internals?
+AC_DEFUN(
+ [_AM_INIT_BOURNE_COMPATIBLE_VAR],
+ [am_bourne_compatible="AS_ESCAPE(_m4_expand([AS_BOURNE_COMPATIBLE]))"])
+
+dnl
+dnl Arguments to this macro:
+dnl
+dnl $1 - shell to test
+dnl $2 - description of the tested feature
+dnl $3 - shell code used to check the feature; to indicate success,
+dnl it can either exit with status 77, or have the last command
+dnl returning with exit status of zero
+dnl $4 - shell code to execute if the check on the shell is successful
+dnl (defaults to nothing)
+dnl $5 - shell code to execute if the check on the shell is not
+dnl successful (defaults to nothing)
+dnl
+AC_DEFUN([_AM_CHECK_SHELL_FEATURE],
+ [AC_REQUIRE([_AM_INIT_BOURNE_COMPATIBLE_VAR])
+ AC_MSG_CHECKING([whether $1 $2])
+ if { $1 -c "$am_bourne_compatible
+AS_ESCAPE([$3])
+test \$? -eq 0 || exit 1
+# Use 77 to indicate success (rather than 0), in case some shell
+# acts like Solaris 10's /bin/sh, exiting successfully on some
+# syntax errors.
+exit 77" >&AS_MESSAGE_LOG_FD 2>&1; test $? -eq 77; }
+ then
+ AC_MSG_RESULT([yes])
+ $4
+ else
+ AC_MSG_RESULT([no])
+ $5
+ fi])
+
+# AM_CHECK_CANDIDATE_TEST_SHELL(SHELL-PATH)
+# -----------------------------------------
+#
+# Check if the given shell is good enough to run our test scripts.
+# Inspired to gnulib's 'tests/init.sh'.
+#
+# We require POSIX and XSI features (e.g., '$(...)' for command
+# substitutions, '$((...))' for shell arithmetic, and support for
+# '${var#...}' and '${var%...}' parameter expansions).
+#
+# We require that the shell can correctly trap EXIT when 'set -e' is in
+# effect (OSF1/Tru64 sh failed to do so, see commit v1.10b-52-g9fe8259).
+#
+# We want to able to define shell aliases with the same name of shell
+# builtins.
+#
+# We also prefer shells that, when 'set -x' is in effect, do not also
+# redirect traces upon stderr redirections. For example,
+# $ set -x; echo x 2>file
+# would emit "+ echo x" into file with older zsh versions. Similarly,
+# $ set -x; P=1 true 2>file
+# would emit "P=1" into file with /usr/xpg4/bin/sh from Solaris 10 and
+# /bin/sh from SunOS 5.11 and OpenBSD 4.7.
+#
+# Finally, we look for weird bugs and portability problems mentioned in
+# the Autoconf manual, and reject shells that suffers from them. (TODO)
+#
+# Use '$am_score' to indicate the degree of acceptability of the shell.
+# A score of "10" means that the shell is good enough for our needs;
+# a score of "9" means that the shell has some minor bugs or limitation,
+# but is still (barely) acceptable for our uses. Any other score means
+# that the shell is broken or unfit.
+#
+AC_DEFUN([_AM_CHECK_CANDIDATE_SHELL],
+ [am_score=10
+ while :; do
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [supports \$(cmd)],
+ [test "$(echo x)" = x],
+ [], [am_score=1; break])
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [supports \$((expr))],
+ [test $((1 + 2 * 3)) = 7],
+ [], [am_score=1; break])
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [supports \${var@%:@glob} and \${var%glob}],
+ [v=a/b/c \
+ && test ${v@%:@*/} = b/c \
+ && test ${v@%:@@%:@*/} = c \
+ && test ${v%/*} = a/b \
+ && test ${v%%/*} = a],
+ [], [am_score=1; break])
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [preserves exit traps with "set -e"],
+ [set -e; trap 'exit $?' 0; (exit 77); exit 77],
+ [], [am_score=1; break])
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [corrupts stderr with "set -x"],
+ [(set -x; P=1 true 2>&3) 3>&1 2>/dev/null | grep P=1],
+ [am_score=9], [])
+
+ echo 'alias false=echo' > conftest-alias.sh
+ echo 'false && test "$(false 97)" = 97' >> conftest-alias.sh
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [supports alias named like shell builtins],
+ [. ./conftest-alias.sh],
+ [rm -f conftest-alias.sh],
+ [rm -f conftest-alias.sh; am_score=1; break])
+
+ _AM_CHECK_SHELL_FEATURE([$1],
+ [supports "test -e"],
+ [test -e config.log && test -e . && test ! -e nonesuch],
+ [], [am_score=1; break])
+
+ break
+ done])
+
+# These messages only goes to the config.log file.
+AC_MSG_NOTICE([will now look for a sturdy POSIX shell, for our testsuite])
+
+AC_CACHE_VAL(
+ [ac_cv_AM_TEST_RUNNER_SHELL],
+ [if test "$AM_TEST_RUNNER_SHELL"; then
+ # Let the user override it.
+ ac_cv_AM_TEST_RUNNER_SHELL=$AM_TEST_RUNNER_SHELL
+ else
+ ac_cv_AM_TEST_RUNNER_SHELL=no
+ am_candidate_shells=${CONFIG_SHELL-}
+ # For the benefit of Solaris.
+ am_PATH=$PATH$PATH_SEPARATOR/usr/xpg6/bin$PATH_SEPARATOR/usr/xpg4/bin
+ for am_sh in sh sh5 dash ash bash zsh ksh pdksh; do
+ AC_PATH_PROG([am_candidate_sh], [$am_sh], [], [$am_PATH])
+ if test -n "$am_candidate_sh"; then
+ am_candidate_shells="$am_candidate_shells $am_candidate_sh"
+ fi
+ AM_SUBST_NOTMAKE([am_candidate_sh])
+ # Must nullify these in order not to interfere with the checks in
+ # the next loop.
+ AS_UNSET([am_candidate_sh])
+ AS_UNSET([ac_cv_path_am_candidate_sh])
+ done
+ AS_UNSET([am_PATH]) # Not required anymore
+ for am_sh in $am_candidate_shells; do
+ am_score=0
+ _AM_CHECK_CANDIDATE_SHELL([$am_sh])
+ if test $am_score -eq 9; then
+ # The shell is barely acceptable for our needs. We might
+ # still find one that is even better, so continue looking.
+ AC_MSG_NOTICE([shell $am_sh is acceptable, but we might do better])
+ ac_cv_AM_TEST_RUNNER_SHELL=$am_sh
+ elif test $am_score -eq 10; then
+ AC_MSG_NOTICE([shell $am_sh is good enough, stop looking])
+ ac_cv_AM_TEST_RUNNER_SHELL=$am_sh
+ break
+ fi
+ done
+ fi
+ AM_TEST_RUNNER_SHELL=$ac_cv_AM_TEST_RUNNER_SHELL])
+
+if test $AM_TEST_RUNNER_SHELL = no; then
+ AC_MSG_FAILURE([m4_normalize([no POSIX shell found that is good
+ enough to be used in our testsuite])])
else
- am_cv_sh_errexit_works=no
+ AC_MSG_NOTICE([will use $AM_TEST_RUNNER_SHELL as the testsuite shell])
fi
-])
-if test $am_cv_sh_errexit_works = no; then
- AC_MSG_WARN(["${MAKE-make} check" will leave leftover directories t/*.dir])
- AC_MSG_WARN([you can clean them up manually using "${MAKE-make} clean" or])
- AC_MSG_WARN(["cd t && ${MAKE-make} clean-local-check'])
-fi
-AC_SUBST([sh_errexit_works], [$am_cv_sh_errexit_works])
+
+AC_ARG_VAR([AM_TEST_RUNNER_SHELL],
+ [a sturdy POSIX shell for our testsuite])
###########################################################################
###########################################################################
+## ---------------------- ##
+## Create output files. ##
+## ---------------------- ##
+
AC_CONFIG_FILES([Makefile])
AC_CONFIG_LINKS([GNUmakefile:GNUmakefile])