Add back config_setting for WASM (no HAVE_SYSCALL_H)

Since there is no config_setting for Linux
(https://github.com/bazelbuild/bazel/issues/11107), Linux needs to be
the default case.

Fix missing deletion of custom Logger

* Prepend the year to each glog line (#516)

This PR fixes issue #516 by prepending the year to each glog line.

Previous format of each line in a log file:
[IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg

New format:
[IWEF]yyyymmdd hh:mm:ss.uuuuuu threadid file:line] msg

* Fix logging_unittest for PR #530

Since the format of each glog line has been changed,
the logging_unittest must also be updated.

Explain log levels.

Add vcpkg installation instructions

Allow CMake user to disable Symbolize functionality

Currently the user has to rely on the HAVE_SYMBOLIZE detection inside
CMakeLists.txt without having any control over whether it should be used.

Add support for disabling HAVE_SYMBOLIZE at configure time so user can specify
`cmake -DHAVE_SYMBOLIZE=0`.
Signed-off-by: Ed Baunton <ebaunton1@bloomberg.net>

* Add target existence checks to Unwind find module

The build systems of projects depending on Glog may call the Unwind find
module multiple times. In these cases, the current unwind find module tries
to create a duplicate unwind::unwind target, crashing the build. This
patch adds an existence check before target creation to fix this issue.
Signed-off-by: Michael Darr <mdarr@matician.com>

* Alphabetize contributor list

* Fix inconsistent CMake style
Signed-off-by: Michael Darr <medarr@email.wm.edu>

Fallback to using file offsets if no symbol is found, like we do if the
object could not be opened.

This makes backtraces usable even if objects in the trace are stripped,
since the trace can be symbolized by post-processing it with a tool like
asan_symbolize.py.

Note that this is not currently compatible with SymbolizeCallback as
this overwrites the filename in the buffer. The behavior is unchanged
in that case.

Closes: #514

Don't call close(2) more than once

Don't call close(2) more then once, even though close(2) returns -1.

See the manual page for details.

- If the user specifies a custom Logger via SetLogger(), the docs state
  that the logging module takes ownership of it.  Prior to this change,
  the logging library was not deleting a custom logger when the
  LogDestination which owns it was destroyed.

The only macro referenced by the public headers is GOOGLE_GLOG_DLL_DECL.
This means fewer defines are propagated to rules that depend on glog.

This uses strip_include_prefix to avoid leaking private headers
(config.h, port.h). This needs a workaround to prevent a "missing
dependency declarations" error.

Use libunwind as an imported target

* Added fixed log name support, take 2

See https://code.google.com/p/google-glog/issues/detail?id=209 and former https://github.com/google/glog/pull/19 - this is an updated version of that patch.

It adds a flag that allows to switch behavior from base_filename + filename_extension + time_pid_string to base_filename + filename_extension, while still defaulting to the current behavior to avoid breakage in existing code. This change would allow easier log rotation schemes and better control on what's written on disk.

* Ifdef away fcntl on mingw

* Use the defined HAVE_FCNTL instead

* ifdef away tests as well

add have_sys_wait for wait() on mingw.

* OS_WINDOWS bug in fseeking to the end, only triggered here

doc: add information about log cleaner

src/logging.cc: fix wrong assignment

src/symbolize.cc: do not check for HAVE_DLFCN_H for macOS

This seems to raise a build failure, see
https://github.com/google/glog/commit/10498b485fe1007f8e913bf2c39ff39fe01c8dc8#commitcomment-35770392Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

src/utilities: fix build without pthread

When UNWIND_LIBRARY is used directly as a public dependency then
absolute path is stored in cmake config file. This is an issue when
glog is used as part of an SDK, which was built somewhere else. When
SDK is installed on developer's machine, cmake config contains a full
path to non-existent location. The solution is to find libunwind
during configure stage and store target name as a dependency, not a full path.
Cmake module looks for libunwind and libunwind-PLAT, where PLAT is one of
supported platforms.
Signed-off-by: Vyacheslav Yurkov <uvv.mail@gmail.com>

- Remove is_default_thread function which is an internal and not used
  function
- Remove g_main_thread_id as it was used only by is_default_thread

Fixes:
 - http://autobuild.buildroot.net/results/5320bbe1205e782e3516d9bead8d1ed825bcbaadSigned-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

removed executable flag from .cmake file

Support pkg-config

Revert "Added fixed log name support"