delta/libevdev.git/libevdev/Makefile.am, branch libevdev-1.2

Add ld version-script

2014-01-29T05:02:40+00:00

Explicit symbol versioning allows us to provide multiple versions of
incompatible API changes. It is a very common practice in GNU world and
avoids the problems occuring if distributions try to ship multiple version
of a single DSO.

Background information available at:
  http://people.redhat.com/drepper/dsohowto.pdf

To see the symbol-versions, use objdump:
  objdump -T libevdev/.libs/libevdev.so.1.0.0
This can also be used to verify that all symbols are correctly
exported (typos in linker-scripts are silently ignored by ld).

Signed-off-by: David Herrmann 

Updated for evdev 0.6's API.

Signed-off-by: Peter Hutterer

Drop --output flag and python generation code from make-event-names.py

2014-01-14T22:00:18+00:00

This is a leftover from when the file was in evemu and used to generate python
headers too.

Signed-off-by: Peter Hutterer 
Reviewed-by: Benjamin Tissoires

Drop gcov flags from main libevdev sources

2013-11-18T08:16:20+00:00

We recompile the sources anyway in the tests and we have our own CFLAGS there.
Drop them from the main library code so we don't leave gcov files everywhere.

Signed-off-by: Peter Hutterer 
Reviewed-by: David Herrmann

Add libevdev_event_type/code_from_name() resolvers

2013-10-31T01:24:23+00:00

Three new helpers are added:
(1) libevdev_event_type_from_name() takes a string describing an EV_*
event type and returns the given event-type constant.
(2) libevdev_event_code_from_name() takes a string describing an event
code and returns the given event-code constant.

Signed-off-by: David Herrmann 
Reviewed-by: Peter Hutterer 
Signed-off-by: Peter Hutterer

Pass linux/input.h as argument to make-event-names.py

2013-10-22T23:04:41+00:00

Rather than a hardcoded path inside the source.

Signed-off-by: Peter Hutterer

Add a copy of linux/input.h

2013-10-22T23:04:34+00:00

This avoids a number of otherwise required ifdefs when building on older kernels

Signed-off-by: Peter Hutterer 
Reviewed-by: David Herrmann

configure: test for python and python-argparse

2013-10-21T10:17:22+00:00

Signed-off-by: Peter Hutterer 
Reviewed-by: David Herrmann

Name-space the read flags better

2013-09-11T02:10:15+00:00

Rename from LIBEVDEV_READ_foo to LIBEVDEV_READ_FLAG_foo to differentiate
better from LIBEVDEV_READ_STATUS_foo.

Signed-off-by: Peter Hutterer 
Acked-by: Benjamin Tissoires

Check for GNU ld and use the flags depending on the outcome

2013-09-03T21:54:09+00:00

Signed-off-by: Peter Hutterer 
Reviewed-by: David Herrmann

Add some gcc/ld optimizations and magic

2013-09-02T21:31:33+00:00

There are several gcc/ld flags that optimize size and performance without
requiring explicit code changes. In no particular order, this adds:
 - gcc -pipe to avoid temporary files and use pipes during compilation
 - gcc -fno-common avoids putting uninitialized global variables not
   marked as "extern" into a common section. This catches compilation
   errors if we didn't mark global variables explicitly as "extern".
 - gcc -fno-strict-aliasing allows us to use unions for some binary magic.
   Otherwise, -O2 might assume that two different types never point at the
   same memory. We currently don't rely on this but it's common practice
   so avoid any non-obvious runtime errors later.
 - gcc -ffunction-sections and -fdata-sections put each function and
   variable into a separate section. This enables ld's --gc-sections to
   drop any unused sections (sections which aren't referenced from an
   exported section). This is very useful to avoid putting dead code into
   DSOs. We can now link any helper function into libevdev and the linker
   removes all of them if they're unused.
 - gcc -fstack-protector adds small stack-corruption protectors in
   functions which have big buffers on the stack (>8bytes). If the
   stack-protectors are corrupted, the process is aborted. This is highly
   useful to debug stack-corruption issues which often are nearly
   impossible to catch without this.
 - ld --as-needed drops all linked libraries that are not actually
   required by libevdev. So we can link to whatever we want and the linker
   will drop everything which is not actually used.
 - ld -z now, resolve symbols during linking, not during runtime.
 - ld -z relro, add relocation-read-only section. This allows to put
   read-only global variables and alike into a read-only section. This is
   useful for variables that need a relocation and thus cannot be
   explicitly put into a read-only section. This option tells the linker
   to mark them read-only after relocations are done. (that's why -z now
   makes sense in combination with this)

All of these options are common in other open-source projects, including
systemd and weston. Don't ask me why they are not marked as default..

Signed-off-by: David Herrmann 
Reviewed-by: Peter Hutterer 
Signed-off-by: Peter Hutterer