While the configure correctly supports being run outside of
the top source directory by default, it's nice if autogen.sh
does too:
$ git clone git://anongit.freedesktop.org/systemd/systemd
$ cd systemd
$ mkdir $(uname -m)
$ cd $(uname -m)
$ ../autogen.sh a
$ make
scan-build is a static analyzer in llvm. As ususal static analyzers
tend to mostly find theoretical bugs in software that has been in
production for a while. For in-development code it can be useful to
check if new issues is added as there is a chance to spot real problems
before release. For systemd we are now down to 297 issues - the vast
majority are false positives because the tool does not understand the
cleanup attribute.
Running clang's static analyzer scan-build is a bit messy. You have to
run both configure and make "inside" the build-scan tool. To have an
easy shortcut from autogen.sh I thus call both directly from it. This
makes it different from the other options in autogen.sh. I chose 's'
for static analysis.
scan-build is in the package clang-analyzer on fedora.
For a while I have been cleaning up warnings when building with clang.
There are currently only two sources of warnings left: Wcast-align and Wgnu.
I am not convinced that fixing up those up is feasible so I run with them
disabled to spot regressions. E.g. clang is a bit more strict wrt to unused
variables with the cleanup attribute and I have fixed a number of those since.
Like the other options in autogen.sh I have a shortcut for clang as well. I use
'l' for llvm.
Since we want to retain the ability to break kernel ←→ userspace ABI
after the next release, let's not make use by default of kdbus, so that
people with future kernels will not suddenly break with current systemd
versions.
kdbus support is left in all builds but must now be explicitly requested
at runtime (for example via setting $DBUS_SESSION_BUS). Via a configure
switch the old behaviour can be restored. In fact, we change autogen.sh
to do this, so that git builds (which run autogen.sh) get kdbus by
default, but tarball builds (which ue the configure defaults) do not get
it, and hence this stays out of the distros by default.
$ touch src/core/dbus.c; make CFLAGS=-O0
make --no-print-directory all-recursive
Making all in .
CC src/core/libsystemd_core_la-dbus.lo
CCLD libsystemd-core.la
$ touch src/core/dbus.c; make CFLAGS=-Og
make --no-print-directory all-recursive
Making all in .
CC src/core/libsystemd_core_la-dbus.lo
src/core/dbus.c: In function 'init_registered_system_bus':
src/core/dbus.c:798:18: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
dbus_free(id);
^
CCLD libsystemd-core.la
-Og Optimize debugging experience. -Og enables optimizations that do
not interfere with debugging. It should be the optimization level of
choice for the standard edit-compile-debug cycle, offering a
reasonable level of optimization while maintaining fast compilation
and a good debugging experience.
Rather then force the user to undefine _FORTIFY_SOURCE,
don't define it in the first place if it cannot be used.
I'm assuming that -O* can only be sensibly specified in $CFLAGS.
The failing check caused autogen.sh to die mysteriously due to `set -e`
and the unquoted `test -z $VAR`.
Also, some syntax fixes to make it work with /bin/sh, which most other
autogen.sh's use.
[zj: implemented simplification suggested by Peters Simon
and fixed the case where gtkdocize was available but is not anymore.]
When intltoolize is not installed, autogen.sh runs without error,
but configure.ac is borked.
./configure: line 12001: syntax error near unexpected token `0.40.0'
./configure: line 12001: `IT_PROG_INTLTOOL(0.40.0)'
On Sat, Jun 9, 2012 at 12:46 AM, Malte Starostik <lists@malte.homeip.net> wrote:
> From: Malte Starostik <m-starostik@versanet.de>
>
> Rules get installed in $(libexecdir)/udev/, so are keymaps. Helper
> binaries go to $(rootprefix)/lib/udev though. Problem is, in the code,
> both are referenced via UDEVLIBEXECDIR which is defined to the former
> location. Result: systemd-udev can't find e.g. the keymap binary to
> apply keymaps.
We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.
Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.
The bits that used to be MIT continue to be MIT.
The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.
