AC_LANG_COMPILER by the way of AC_COMPILE_IFELSE etc.
* acspecific.m4 (_AC_EXEEXT): Use _AC_LINK_IFELSE, not
AC_LINK_IFELSE to avoid AC_REQUIREing AC_PROG_CC which precisely
requires _AC_EXEEXT.
Don't run _AC_CYGWIN, _AC_MINGW32, _AC_EMXOS2.
* aclang.m4 (_AC_PROG_F77_G): Use _AC_COMPILE_IFELSE, not
AC_COMPILE_IFELSE.
(_AC_LANG_COMPILER_WORKS): Use _AC_LINK_IFELSE, not
AC_LINK_IFELSE.
* acgeneral.m4 (_AC_DEFUN_PRO, _AC_DEFUN_EPI): Keep a stack of
macro expansions, _AC_EXPANSION_STACK.
Use `_AC_EXPANDING(FOO)' to record the fact that `FOO' is being
expanded.
(_AC_REQUIRE): Diagnose required macros which are already being
expanded.
Record in _AC_EXPANSION_STACK the AC_REQUIRE calls.
(_AC_EXPANSION_STACK_DUMP): New macro.
(_AC_RUN_IFELSE): New macros which are the former
AC_COMPILE_IFELSE etc. without AC_LANG_COMPILER_REQUIRE.
(AC_COMPILE_IFELSE, AC_LINK_IFELSE, AC_RUN_IFELSE): Use them.
* aclang.m4 (_AC_LANG_COMPILER_WORKS): Likewise.
* aclang.m4 (AC_PROG_CC_C_O, AC_PROG_F77_C_O): Fix typos where
$objext were used instead of $ac_objext.
* autoreconf.sh: Likewise.
* autoupdate.sh: Likewise.
* autoconf.sh: Change `exit' to `{ (exit 1); exit; }' after m4 and
awk commands to ensure exit state is in a defined state.
autoconf and autoheader. Expected warnings disabled by "-W none"
Preceding comment removed as no longer relevant.
* tests/semantics.m4 (AC_CHECK_PROG & AC_PATH_PROG): Check
stderr from autoconf.
(AC_PATH_PROG & AC_PATH_PROGS): Likewise.
(AC_CONFIG_FILES, HEADERS, LINKS and COMMANDS): Likewise.
* tests/tools.m4 (autoheader): Check that autoheader prints
a warning for missing templates. Check stderr from autoconf.
* tests/torture.m4 (config.status under extreme conditions):
Check stderr from autoconf and autoheader.
(command line interface): Check stderr from autoconf.
(AT_INIT): Let `at_stop_on_error' and `at_verbose' be `:'/`false'
variables instead of `'/`1'.
`at_check_stds' replaces `at_no_redirs'.
Rename `Snippet 3' as `Snippet 4'.
Introduce `Snippet 3' for variable initializations.
Adjust the dependencies.
(AT_CHECK): Don't show diff's result unless verbose.
as well.
(_AC_INIT_HELP): Likewise.
(NEWS): Note checking for configure.gnu.
* doc/autoconf.texi: Document checking for configure.gnu when
recursing subdirectories.
from the output - it is only printed by Visual C that gives
correct exit status.
* aclang.m4 (AC_PROG_CPP): Don't try '${CC-cc} -nologo -E'
by the same reason.
and checks whether it produces errors or warnings. Don't put grep
output into a variable, use another grep instead.
(AC_TRY_CPP): Use _AC_TRY_CPP. Copy conftest.err to config.log
if the case of an error.
* aclang.m4 (AC_LANG(C), AC_LANG(C++), AC_LANG(Fortran 77)):
define AC_LANG_ABBREV to the short language name.
(_AC_PROG_CPP_WORKS): New macro. It checks whether the current
preprocessor can be used to check for existance of headers.
Most code taken from ...
(AC_PROG_CPP): ... here. Use _AC_PROG_CPP_WORKS. Use shell
"for" to find working CPP. Use AC_LANG_PUSH(C) and AC_LANG_POP -
it's a macro for C only.
(AC_PROG_CXXCPP): Rewritten using _AC_PROG_CPP_WORKS.
