We require POSIX.1-2001. Some systems provide it only with feature
test macro _POSIX_C_SOURCE defined to 200112L. Since we don't define
it, the build fails there. Observed on Solaris 10.
We actually require the XSI extension. The GNU C Library provides it
by default. With _POSIX_C_SOURCE 200112L, however, you have to define
feature test macro _XOPEN_SOURCE to get it. But then _POSIX_C_SOURCE
is redundant.
Make configure put #define _XOPEN_SOURCE 600 into config.h. Drop the
two existing #define _XOPEN_SOURCE 500 in .c files.
Now Solaris cc refuses to play ball unless switched to C99. Replace
AC_PROG_CC by AC_PROG_CC_STDC to mollify it.
Unfortunately, use of _XOPEN_SOURCE exposes bugs in AIX libc and old
versions of GNU libc:
* AIX defines struct in6_addr's member s6_addr as a macro expanding
into the actual member. Without _ALL_SOURCE (the default), the
expansion is wrong and doesn't compile. Observed with AIX V7.2.
* GNU lib's IN6_IS_ADDR_V4MAPPED() is unusable without
_DEFAULT_SOURCE (default) or _GNU_SOURCE. Observed with Debian 8.
Tracked at <https://sourceware.org/bugzilla/show_bug.cgi?id=16421>,
fixed in version 2.25.
Affects just sockaddr_ntop()'s special case from commit 372cdb136 "Use
IPv4 format for IPv4-mapped addresses", v4.3.31. Disable the special
case and use IPv6 format on such systems. This is a very minor
usability regression. Could be avoided, I guess, but it's not worth
the trouble.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
AX_LIB_READLINE tries to cope with systems where readline lacks
history support, or lacks headers, or needs headers included in
unorthodox ways. It puts six HAVE_ macros into config.h, and its
usage example takes 24 lines of code just to include two headers.
Way too complicated for my taste. Replace with new MY_LIB_READLINE,
which succeeds only when you have a sane readline, and then defines
*one* macro: HAVE_LIBREADLINE.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
Readline provides fancy command line editing such as <Arrow Up> for
previous commands and CTRL+A to jump to the beginning of the line.
This patch does not add any completion on <tab> key, a TODO, if you
will.
A new command line flag, -H, turns on saving the history to disk.
This may have security implications on shared computers, as all
commands are saved as-is. Thus "change re 1234" would be logged
directly to the file.
Signed-off-by: Martin Haukeli <martin.haukeli@gmail.com>
Rebase on top of preparatory work, fix a few bugs, and tidy up:
* Update the standalone client build, too.
* Fix the Windows build.
* Keep command line options sorted case-insensitively.
* Error out when $HOME is unset and getpwuid() fails, just like we do
for $LOGNAME.
* Give @input_from_rl, @has_rl_input static linkage.
* @has_rl_input is a flag, not a counter, set and test it accordingly.
* Save all input in history, not just commands. Martin's attempt to
recognize commands works only as long as the server sends prompts
faster than the user sends input. Drop that part, and update commit
message accordingly.
* Fix recv_input() not to truncate value of strlen() to int, and to
use memmove() for updating @input_from_rl in place.
* Clean up whitespace in a few places.
* Tweak commit message.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
Testing whether the compiler supports it is a bit tricky.
The obvious AX_APPEND_COMPILE_FLAGS([-fstack-protector-strong])
doesn't suffice, since some ports of the GNU toolchain reportedly pass
this test, then fail to link. That's because the compiler accepts the
flag, duly emits references to helper code in libc, but libc doesn't
provide, and linking fails.
Instead, use AX_APPEND_LINK_FLAGS with an input source that makes the
compiler emit the extra stack checking code. This requires the latest
version from the autoconf-archive, so update m4/ax* to commit e3d948b.
Also update m4/my_append_compile_flags.m4 to keep it in sync with
upstream's ax_append_compile_flags.m4.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
When AC_PROG_CC detects GCC, Make.mk adds a bunch of flags to CFLAGS.
Works only for flags that any version of gcc in use accepts.
Instead, make configure add the flags that actually work to CFLAGS.
This will let us add flags that work only for some compilers.
The new autoconf macros are from autoconf-archive v2015.02.24.
Unfortunately, AX_APPEND_COMPILE_FLAGS doesn't work reliably for
-Wno-*: gcc complains about unknown -Wno-foo only when other
diagnostics are being produced. Test -Wfoo instead of -Wno-foo, and
rename to MY_APPEND_COMPILE_FLAGS.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
commit dd946914edb9da25e2d8c8b2186fab5d8103f3d4
Author: Daniel Richard G <skunk@iSKUNK.ORG>
Date: Thu Oct 3 18:56:24 2013 +0200
AX_PTHREAD: add support for Clang
Further details can be found at <http://savannah.gnu.org/patch/?8186>.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
The test uses an erroneous non-directive within #ifdef _WIN32 to
signal that _WIN32 is defined. Some compilers choke on this even when
_WIN32 isn't defined. Observed with FreeBSD 4.10's gcc 2.95.4.
Broken in commit c02468fd, v4.3.22. Standaline client build already
broken in commit 774b590f, v4.3.17.
Use an unmatched brace instead.
Checking Windows libraries with autoconf is cumbersome, because
linking often fails unless you include the header, and AC_SEARCH_LIBS
doesn't permit that.
Just detect the Windows API instead, with new MY_WINDOWS_API.
and Autoconf macros that come with Automake. It supports multiple
separate builds of the same source tree, and updates dependencies
automatically. Targets info, html, install, install-html, uninstall
and dist are not yet implemented.
System configuration is now automatic. Previously, you had to choose
one of several canned system configurations, defined in Make.sysdefs.
Currently, system configuration always uses UCONTEXT for LWP, and
chooses LWP only if its requirements are met.
Feature configuration changed: instead of editing build.conf (further
processed by doconfig), you pass arguments to configure. Note that
build.conf settings that can be overridden in econfig have no
configure equivalent; just edit econfig instead.
Because generated headers complicate makefiles, fold gamesdef.h into
its users: path.c and ipglob.c become path.c.in and ipglob.c.in,
constants.c, vers.c, options.h simply hardcode defaults (most of them
are run-time configurable).
Call the client empire instead of emp_client. This matches what the
old standalone build did.
