* 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 $ac_objext.
as well.
(_AC_INIT_HELP): Likewise.
(NEWS): Note checking for configure.gnu.
* doc/autoconf.texi: Document checking for configure.gnu when
recursing subdirectories.
from the output - it is only printed by Visual C that gives
correct exit status.
* aclang.m4 (AC_PROG_CPP): Don't try '${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.
operator when \(\) is used, and matches a string longer than 120
characters.
Reported by Geoff Keating.
* doc/autoconf.texi (Limitations of Usual Tools): Some words about
this.
* acgeneral.m4 (_AC_SHELL_DIRNAME): Fall back to echo|sed if expr
fails.
From Paul Eggert.
AC_CANONICAL_* revamping.
Reported by Peter Eisentraut.
In fact, let's just use the precious variables handling.
* acgeneral.m4 (AC_VALIDATE_CACHED_SYSTEM_TUPLE): Obsoleted.
(_AC_ARG_VAR_PRECIOUS): New macro, eved from...
(AC_ARG_VAR): this macro. Adjust.
(_AC_INIT_PREPARE): `build_alias', `host_alias', and
`target_alias' are precious.
* doc/autoconf.texi: Adjust.
(_AC_DIVERT(PARSE_ARGS)): this. Adjust dependencies.
(AC_ARG_WITH): Remove spurious newline.
(AC_ARG_VAR): No longer save precious variables in
ac_configure_args, rather snapshot them twice (one kept
unmodified, another one to be written to/overwritten by the cache
file).
(AC_CACHE_SAVE): Let the cache variables named `ac_cv_env_*'
be overwritten when loading the cache (i.e., don't use the
: ${foo=...} trick).
(_AC_ARG_VAR_VALIDATE): Compare the two snapshots of the precious
variables.
(_AC_INIT_PREPARE): Call it after having loaded the cache file.
_AC_PROG_F77_GNU): Use ac_ext. Use ACEOF instead of EOF.
(AC_LANG_CONFTEST): New macro.
(_AC_PROG_CC_G, AC_PROG_CC_C_O, _AC_PROG_CXX_G, AC_PROG_F77_C_O,
_AC_PROG_F77_V_OUTPUT): Use it.
* acgeneral.m4 (AC_TRY_CPP, AC_EGREP_CPP, AC_COMPILE_IFELSE,
AC_LINK_IFELSE, AC_RUN_IFELSE): Likewise.
`size_t' which are often used too.
Fix a bug which prevents recognition of `bool' and `char'.
(_AC_CHECK_TYPE_MAYBE_TYPE_P): New macro.
(AC_CHECK_TYPE): Use it.
the options, and then optionally a small paragraph.
* acgeneral.m4 (AC_DIVERT_ONCE): New macro.
(HELP_VAR_END): New diversion.
(AC_ARG_ENABLE, AC_ARG_WITH, AC_ARG_VAR): Use AC_DIVERT_ONCE.
(AC_ARG_VAR): Follow the --help style.
* acspecific.m4 (AC_PATH_X): Use AC_DIVERT_ONCE.
causes the compiler to output verbose linking information.
(AC_F77_LIBRARY_LDFLAGS): Use _AC_PROG_F77_V instead of
simply "-v"
(AC_F77_LIBRARY_LDFLAGS): New algorithm to parse flags, uses
set/shift shell commands.
(AC_F77_LIBRARY_LDFLAGS): Set FLIBS at end, after determining
ac_cv_flibs.
* acgeneral.m4 (AC_SHELL_DIRNAME): When using m4 the argument
is named `$1' not `$dir'.
When using m4 you ought to quote properly.
When using m4, you should check that there are not too many shell
quotes (inside the macro itself, and where it is called).
When you do this, Autoconf, hm, works better.
* acgeneral.m4 (_AC_INIT_HELP): Direct reader to descriptions
of useful variables at the end of the --help.
(AC_ARG_VAR): Emphasize use of environment variables to override
and/or help the configure script. Ensure that a given variable
is only documented once in the --help.
(AC_CHECK_LIB): Call AC_ARG_VAR to document and register the
LDFLAGS variable, and...
(AC_CHECK_HEADER): do the same for the CPPFLAGS variable.
* aclang.m4 (AC_PROG_CC): Call AC_ARG_VAR to document and register
the CC and CFLAGS variables, and do the same for...
(AC_PROG_CXX): CXX and CXXFLAGS, and...
(AC_PROG_F77): F77 and FFLAGS.
