cmake: replace CheckFunctionExists with CheckSymbolExists

Checking functions with `CheckFunctionExists` may
get wrong results, we should replace it with
`CheckSymbolExists`, which is recommended by

cmake: replace CheckFunctionExists with CheckSymbolExists

Checking functions with `CheckFunctionExists` may
get wrong results, we should replace it with
`CheckSymbolExists`, which is recommended by the cmake
official documentation.
Before using `CheckSymbolExists`, we use
`CheckIncludeFiles` to check header files and save the
available header files in a variable that guarantees
`CheckSymbolExists` and `CheckTypeSize` to work correctly.
This approach is modeled after the cmake scripts of `curl`.

The following functions or files were not found before
modification, they can now be found:
- msys2 + mingw-8.1.0 on Windows10 or mingw-7.3.0 on Ubuntu-18.04
timerclear
timercmp
timerisset

- windows10
getaddrinfo
getnameinfo
getprotobynumber
getservbyname
putenv
strtoll
timerclear
timercmp
timerisset

- ubuntu-18.04
sys/sysctl.h
timeradd
timerclear
timercmp
timerisset

- MacOS 10.13
sys/random.h
timeradd
timerclear
timercmp
timerisset

(cherry picked from commit 41d1d75a84e03219ec037b0f7982a67fb031eae7)

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Merge branch 'osx-clock'

Moves the thread into real-time scheduling class, as recommended in [1], it
fixes the separate test provided by @ygj6 [2] everywhere (github actions,
travis-ci, appveyor) un

Merge branch 'osx-clock'

Moves the thread into real-time scheduling class, as recommended in [1], it
fixes the separate test provided by @ygj6 [2] everywhere (github actions,
travis-ci, appveyor) under osx.

[1]: https://developer.apple.com/library/archive/technotes/tn2169/_index.html
[2]: https://github.com/azat-archive/osx-timers/commit/dde1a6e4d04506d0e0fb193ebb9f49ae25873be6

Although even after this changes the following time-related tests failed
on travis-ci:
- no_events
- del_wait

But anyway I guess #940 can be closed, since this fixes the issue in common.

* osx-clock:
test: Use THREAD_* wrappers in del_notify/del_wait
test: move threads created with THREAD_START() to realtime scheduling class too
test: put thread into real time scheduling class on osx for better latencies

Closes: #940
(cherry picked from commit a6f81aa45455c8afb69980f7026a0e706f4f9387)

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evutil_time: detect and use _gmtime64_s()/_gmtime64()

(cherry picked from commit 148d12ad31b03a813f4ffd9df14a85392aa74130)

cmake: fix getrandom() detection

Fixes: 86f55b04 ("arc4random: replace sysctl() with getrandom (on linux)")
(cherry picked from commit 194a5d822651c03fc988c1bf087e65ed20f453f7)

arc4random: replace sysctl() with getrandom (on linux)

Since sysctl() is deprecated for a long-long time, according to
sysctl(2):

Since Linux 2.6.24, uses of this system call result in warnings

arc4random: replace sysctl() with getrandom (on linux)

Since sysctl() is deprecated for a long-long time, according to
sysctl(2):

Since Linux 2.6.24, uses of this system call result in warnings in the kernel log.

Fixes: #890
Suggested-by: Pierce Lopez
(cherry picked from commit 86f55b0420f864b518475f781ce7a3c619180b12)

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Merge branch 'issue-807-accept4-getnameinfo-AF_UNIX'

* issue-807-accept4-getnameinfo-AF_UNIX:
http-server: add usage/help dialog
http: avoid use of uninitialized value for AF_UNIX/AF_LOCAL socka

Merge branch 'issue-807-accept4-getnameinfo-AF_UNIX'

* issue-807-accept4-getnameinfo-AF_UNIX:
http-server: add usage/help dialog
http: avoid use of uninitialized value for AF_UNIX/AF_LOCAL sockaddr
http-server: add ability to bind to unix-socket
build: struct sockaddr_un detection (sys/un.h, afunix.h)

Fixes: #807
(cherry picked from commit 76eded24d3b0c3fc48c5a888906cc9043223101b)

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cmake: fix checking of devpoll backend (like in autotools, by devpoll.h existence)

(cherry picked from commit 8e87de3c24cad940516f49aa0466cfe53fa042bf)

Cleanup __func__ detection

First of all __func__ is not a macro, it is char[] array, so the code
that we had before in cmake, was incorrect, i.e.:
#if defined (__func__)
#define EVENT____func__

Cleanup __func__ detection

First of all __func__ is not a macro, it is char[] array, so the code
that we had before in cmake, was incorrect, i.e.:
#if defined (__func__)
#define EVENT____func__ __func__
#elif defined(__FUNCTION__)
#define EVENT____func__ __FUNCTION__
#else
#define EVENT____func__ __FILE__
#endif

So just detect do we have __func__/__FUNCTION__ in configure/cmake
before build and define EVENT__HAVE___func__/EVENT__HAVE___FUNCTION__
to use the later to choose which should be used as a __func__ (if it is
not presented).

Closes: #644
(cherry picked from commit e85818d24850540d220e6d7bc0a30653ba2135f2)

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Get rid of macros which are never used

There are no expansions of these macros or tests for their existence.

Signed-off-by: Philip Prindeville <[email protected]>
(cherry picked from co

Get rid of macros which are never used

There are no expansions of these macros or tests for their existence.

Signed-off-by: Philip Prindeville <[email protected]>
(cherry picked from commit 755896efe25e5caecd498c08cce072c713720783)

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Fix arc4random_addrandom() detecting and fallback (regression)

But this is kind of hot-fix, we definitelly need more sane arc4random
compat layer.

Fixes: #488
Introduced-in: 6541168 ("Detect arch4r

Fix arc4random_addrandom() detecting and fallback (regression)

But this is kind of hot-fix, we definitelly need more sane arc4random
compat layer.

Fixes: #488
Introduced-in: 6541168 ("Detect arch4random_addrandom() existence")
(cherry picked from commit 266f43af7798befa3d27bfabaa9ae699259c3924)

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Merge branch 'win32-fixes'

This patchset fixes win32 builds after some previous patches (referenced
in particular commits), and also removes some quirks for win32.

* win32-fixes:
test: do not ret

Merge branch 'win32-fixes'

This patchset fixes win32 builds after some previous patches (referenced
in particular commits), and also removes some quirks for win32.

* win32-fixes:
test: do not return void
log/win32: fix exporting extern variable
log-internal: missing extern "C"
log: remove USE_GLOBAL_FOR_DEBUG_LOGGING
cmake: Export missing symbols for win32
cmake: eliminate EVENT_BUILDING_REGRESS_TEST, since we link with shared libs
test: windows doesn't have WNOWAIT
cmake: clean not used #defines from event-config.h
cmake: add <pthread.h> only for non-win32

(cherry picked from commit d84f0205453941235b0e04729098d4329c189bba)

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Merge branch 'cmake-missing-bits'

This patchset adds next missing things (in compare to autotools):
- pkgconfig
- event_pthreads/event_openssl
- compile shared/static libraries always

And some fixe

Merge branch 'cmake-missing-bits'

This patchset adds next missing things (in compare to autotools):
- pkgconfig
- event_pthreads/event_openssl
- compile shared/static libraries always

And some fixes, because it will not build after fixing other things:
- export missing symbols for cmake (-fvisibility=hidden)

* cmake-missing-bits:
cmake: support visibility for AppleClang too
cmake: fix export absolute path and relative path and cleanup a bit
cmake: generate and install pkgconfig files
cmake: build SHARED and STATIC libraries (like autoconf does)
cmake: add missing event_openssl/event_pthreads libraries
Export symbols for -fvisibility=hidden (under cmake)

Refs: #246
(cherry picked from commit 489991a2b2628ba1ff4e6879b9f67ec35d224c38)

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Merge branch 'cmake-configure-fixes-v2'

Fixes in cmake, to make it more like configure and support some
cross-compiling.

* cmake-configure-fixes-v2:
cmake: fix extracting of the version from git

Merge branch 'cmake-configure-fixes-v2'

Fixes in cmake, to make it more like configure and support some
cross-compiling.

* cmake-configure-fixes-v2:
cmake: fix extracting of the version from git (check for number of matches)
Detect arch4random_addrandom() existence
Use off_t instead of ev_off_t for sendfile() (fixes android build)
cmake: detect _GNU_SOURCE not by __GNU_LIBRARY__ only (fallback to _GNU_SOURCE)
Check for WNOWAIT in waitpid() in runtime (not in cmake/configure)
cmake: add <pthread.h> into CMAKE_REQUIRED_INCLUDES for sizeof(pthread_t)
cmake: fix values for #cmakedefine
cmake: drop duplicates from event-config template
cmake: add value for the #cmakedefine macros (like autoconf)
cmake: Fix checking of enum values from sysctl.h

(cherry picked from commit 5aade2d30b6c5eff226cbf7b63fda5a01987ba4f)

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Merge branch 'fix-openssl-linking'

* fix-openssl-linking:
sample/https-client: use ERR_remove_*state() when we have them
Do not check for ERR_remove_thread_state() (do not link ssl into every li

Merge branch 'fix-openssl-linking'

* fix-openssl-linking:
sample/https-client: use ERR_remove_*state() when we have them
Do not check for ERR_remove_thread_state() (do not link ssl into every library)

Closes: #476
(cherry picked from commit 98faf19895bd6aa41c68f7da050179e207f05ae1)

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Merge branch 'fix-struct-linger'

@jbech
"Accidentally disabled by 0dda56a due to confusion between struct
linger vs. SO_LINGER and #define vs. AC_DEFINE. Try adding synthetic
#error test to co

Merge branch 'fix-struct-linger'

@jbech
"Accidentally disabled by 0dda56a due to confusion between struct
linger vs. SO_LINGER and #define vs. AC_DEFINE. Try adding synthetic
#error test to confirm."

* fix-struct-linger:
cmake: check for 'struct linger' existence
test/bench*: prefix event-config.h macros after 0dda56a48e94
test/bench_httpclient: restore SO_LINGER usage after 0dda56a48e94

Fixes: #444 (original pull-request)
(cherry picked from commit 9d5a4bdc5cfbf2385efc7c58103161b3512c4500)

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cmake: cleanup

- Remove a redundant check on netdb.h (EVENT__HAVE_NETDB_H).
- Properly setup EVENT__SIZEOF_SSIZE_T for the case where "ssize_t" is
not "int".
- Remove unused EVENT__HAVE_PTHREAD.
-

cmake: cleanup

- Remove a redundant check on netdb.h (EVENT__HAVE_NETDB_H).
- Properly setup EVENT__SIZEOF_SSIZE_T for the case where "ssize_t" is
not "int".
- Remove unused EVENT__HAVE_PTHREAD.
- Set EVENT__HAVE_LIBZ instead of EVENT__HAVE_ZLIB (and remove the
latter).

Closes: #391 (cherry-picked from PR)

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tests: use waitpid(..., WNOWAIT) to fix failing of main/fork under solaris

According to solaris docs:
"One instance of a SIGCHLD signal is queued for each child process whose
status has changed.

tests: use waitpid(..., WNOWAIT) to fix failing of main/fork under solaris

According to solaris docs:
"One instance of a SIGCHLD signal is queued for each child process whose
status has changed. If waitpid() returns because the status of a child
process is available, and WNOWAIT was not specified in options, any pending
SIGCHLD signal associated with the process ID of that child process is
discarded. Any other pending SIGCHLD signals remain pending."

And interesting thing that it works if you add sleep(1) before waitpid(), and
also if you run with --verbose (some race or what).

But linux doesn't support WNOWAIT in waitpid() so add detection into
cmake/autotools.

Fixes: #387
Link: https://bugzilla.redhat.com/show_bug.cgi?id=840782

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[#372] check for errno.h

cmake: don't define EVENT__NEED_DLLIMPORT always (fixes VS2013 static build)

Otherwise that #ifdef in visibility.h is useless, and __declspec(dllimport)
will be always on.

Fixes: #314
Fixes: 4545fa

cmake: don't define EVENT__NEED_DLLIMPORT always (fixes VS2013 static build)

Otherwise that #ifdef in visibility.h is useless, and __declspec(dllimport)
will be always on.

Fixes: #314
Fixes: 4545fa9b6866df47ce2f908631a84477a94d5f49 ("Add option to build shared
library")

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More cmake updates, lot's of missing definitions

CMake syntax fixes fo .in files

Lot's of cmake updates

This is still not done, cmake here was a horrid mess, but we're
getting our act together now.

sample/https-client: check for ERR_remove_thread_state() existence

Fixes: freebsd 9.2 build

Add option to build shared library

Stop checking for inet_aton; we don't use it.

We had cmake and autoconf tests for the inet_aton function... but we
never actually use it any more.

(The autoconf tests still use the callability of i

Stop checking for inet_aton; we don't use it.

We had cmake and autoconf tests for the inet_aton function... but we
never actually use it any more.

(The autoconf tests still use the callability of inet_aton to decide
whether we need to link against -lresolv)

Reported by Harlan Stenn.

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