Created autoconf/ast_check_raii.m4: contains AST_CHECK_RAII which
checks compiler requirements for RAII:
gcc: -fnested-functions support
clang: -fblocks (and if required -lBlocksRuntime)
The original check was implemented in configure.ac and now has it's
own file. This function also sets C_COMPILER_FAMILY to either gcc or
clang for use by makefile

Created autoconf/ast_check_strsep_array_bounds.m4 (contains
AST_CHECK_STRSEP_ARRAY_BOUNDS):
which checks if clang is able to handle the optimized strsep & strcmp
functions (linux). If not, the standard libc implementation should be
used instead. Clang + the optimized macro's work with:
strsep(char *, char []), but not with strsepo(char *, char *).
Instead of replacing all the occurences throughout the source code,
not using the optimized macro version seemed easier

See 'define __strcmp_gc(s1, s2, l2) in bits/string2.h':
llvm-comment: Normally, this array-bounds warning are suppressed for
macros, so that unused paths like the one that accesses __s1[3] are
not warned about.  But if you preprocess manually, and feed the
result to another instance of clang, it will warn about all the
possible forks of this particular if statement. Instead of switching
of this optimization, another solution would be to run the preproces-
sing step with -frewrite-includes, which should preserve enough
information so that clang should still be able to suppress the diag-
nostic at the compile step later on.

See also "https://llvm.org/bugs/show_bug.cgi?id=20144"
See also "https://llvm.org/bugs/show_bug.cgi?id=11536"

Makefile.rules: If C_COMPILER_FAMILY=clang then add two warning
suppressions:
-Wno-unused-value
-Wno-parentheses-equality
In an earlier review (reviewboard: 4550 and 4554), they were deemed a
nuisace and less than benefitial.

configure.ac:
Added AST_CHECK_RAII() see earlier
Added AST_CHECK_STRSEP_ARRAY_BOUNDS() see earlier
Removed moved content

ASTERISK-24917
Change-Id: I12ea29d3bda2254ad3908e279b7effbbac6a97cb

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@418894 65c4cc65-6c06-0410-ace0-fbb531ad65f3

ast_ext_tool_check.m4 isn't handling cases where a path to a package is
provided (E.G. --with-mysqlclient=/some/sysroot) and the package has a config
tool (E.G. mysql_config) and the package has its own subdirectories in include
or lib.  For example, mysql's libraries are in ${MYSQLCLIENT_DIR}/usr/lib/mysql
but ast_ext_tool_check sets MYSQLCLIENT_LIB to ${MYSQLCLIENT_DIR}/usr/lib.
libxml2 has the same problem with its includes.  They're in 
${LIBXML2_DIR}/usr/include/libxml2 not directly in ${LIBXML2_DIR}/usr/include.
Both cause configure to fail and there are others in the same boat.

The problem is caused by logic in ast_ext_tool_check that overrides the result
of the config tool's --cflags and --libs options if package_DIR is set.

This patch prepends package_DIR (if specified) to the -L and -I results from
the package's config tool instead of overriding them.

Tested by: George Joseph
Tested by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/3550/
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With ptlib 2.10.9, the configure script fails due to grep returning multiple
matches for the pattern it searches for. This patch updates the pattern
matching to return only the actual version for the symbol searched for,
PTLIB_VERSION.

(closes issue ASTERISK-20980)
Reported by: Stefan Reuter
patches:
  ASTERISK-20980-1.patch uploaded by Stefan Reuter (license 5339)
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AST_PKG_CONFIG_CHECK: Similar to AST_EXT_LIB_CHECK, but simply uses
pkg-config data.

This simple version only uses pkg-config(1)'s tests.

This commit also uses the macro to test for GTK2 and GMIME (instead of
the current direct usage of pkg-config).

Review: https://reviewboard.asterisk.org/r/1906/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@366351 65c4cc65-6c06-0410-ace0-fbb531ad65f3

The principle difference between libvorbisfile v1.1.2 and newer (at least
v1.2.0) is the addition of the predefined callbacks OV_CALLBACKS_xxx in
vorbis/vorbisfile.h used for ov_open_callbacks().

* Updated the configure script to detect if libvorbisfile.h declares
OV_CALLBACKS_NOCLOSE.

* Copied the declaration of OV_CALLBACKS_NOCLOSE from v1.2.0 to allow
v1.1.2 to compile.

(closes issue ASTERISK-19370)
Reported by: Jonn Taylor
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Recent versions of autoconf (2.68 on my system) won't properly process the configure
script unless every call to AC_LANG_PROGRAM is m4-quoted. Many calls in the script
were, but many were not. This patch corrects the unquoted calls.
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  r339720 | rmudgett | 2011-10-06 17:58:40 -0500 (Thu, 06 Oct 2011) | 27 lines
  
  Merged revisions 339719 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.8
  
  ........
    r339719 | rmudgett | 2011-10-06 17:47:50 -0500 (Thu, 06 Oct 2011) | 20 lines
    
    Fix regression in configure script for libpri capability checks.
    
    JIRA AST-598 added the PRI_L2_PERSISTENCE option to fix BRI PTMP TE layer
    2 persistence issues with some telcos.  ASTERISK-18535 attempted to fix
    the unexpected requirement that libpri *must* have that feature to work
    with Asterisk.  The AST_EXT_LIB_SETUP_DEPENDENT lines made the PRI
    optional features required.  Unfortunately, I thought
    AST_EXT_LIB_SETUP_DEPENDENT didn't do anything useful for libpri and
    deleted those lines for libpri.  The result was the HAVE_PRI_xxx defines
    that control the ability to use optional libpri features were also
    deleted.
    
    * Created AST_EXT_LIB_SETUP_OPTIONAL configuration macro to allow optional
    features in a library that the source code could take advantage of if the
    code supports the feature.
    
    (closes issue ASTERISK-18687)
    Reported by: Norbert
    Tested by: rmudgett
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  r316193 | tzafrir | 2011-05-03 13:57:16 +0300 (ג', 03 מאי 2011) | 8 lines
  
  Re-fix bashism in ./configure: s/let/$(( ))/
  
  A forward-port in r278985 accidentally re-introduced issue 17485. Fixing
  it. Thanks to Jilles Tjoelker for the good report.
  
  (closes issue #17485)
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  r301221 | pabelanger | 2011-01-09 16:40:34 -0500 (Sun, 09 Jan 2011) | 21 lines
  
  Merged revisions 301220 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
  ........
    r301220 | pabelanger | 2011-01-09 16:38:24 -0500 (Sun, 09 Jan 2011) | 14 lines
    
    SOUND_CACHE_DIR now defaults to empty
    
    Sounds files included in the Asterisk tarball were being ignored and
    re-downloaded.  Users wanting to cache the files can still override the setting
    using the --with-sounds-cache option.
    
    (closes issue #18589)
    Reported by: pabelanger
    Patches:
          issue18589.patch uploaded by pabelanger (license 224)
          Tested by: pabelanger
    
    Review: https://reviewboard.asterisk.org/r/1074/
  ........
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  r290752 | qwell | 2010-10-07 15:58:47 -0500 (Thu, 07 Oct 2010) | 23 lines
  
  Merged revisions 290751 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
  ................
    r290751 | qwell | 2010-10-07 15:57:14 -0500 (Thu, 07 Oct 2010) | 16 lines
    
    Merged revisions 290750 via svnmerge from 
    https://origsvn.digium.com/svn/asterisk/branches/1.4
    
    ........
      r290750 | qwell | 2010-10-07 15:56:04 -0500 (Thu, 07 Oct 2010) | 9 lines
      
      Allow PRI to build properly when using --with-pri.
      
      Use the directories found for the parent when using lib dependencies.
      
      (closes issue #17314)
      Reported by: tzafrir
      Patches: 
            17314-withdeps.diff uploaded by qwell (license 4)
    ........
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  r279502 | seanbright | 2010-07-26 11:43:54 -0400 (Mon, 26 Jul 2010) | 12 lines
  
  Merged revisions 279501 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
  ........
    r279501 | seanbright | 2010-07-26 11:41:13 -0400 (Mon, 26 Jul 2010) | 5 lines
    
    Expand the correct value within AST_OPTION_ONLY.
    
    (closes issue #17703)
    Reported by: stuarth
  ........
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  r278984 | tilghman | 2010-07-23 12:04:15 -0500 (Fri, 23 Jul 2010) | 5 lines
  
  Establish a maximum version for openh323 (i.e. not opal), because chan_h323 will fail to load, even if it links.
  
  (issue #17679)
  Reported by: am
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  r277738 | tilghman | 2010-07-17 11:59:11 -0500 (Sat, 17 Jul 2010) | 5 lines
  
  Remove uclibc cross-compile triplet, as uclibc has a working fork()... it's only uclinux that does not.
  
  (closes issue #17616)
   Reported by: pprindeville
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@277775 65c4cc65-6c06-0410-ace0-fbb531ad65f3

(closes issue #17654)
 Reported by: pprindeville
 Patches: 
       issue17654.diff uploaded by qwell (license 4)
 Tested by: qwell, pprindeville


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@276830 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Review: https://reviewboard.asterisk.org/r/790/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@276731 65c4cc65-6c06-0410-ace0-fbb531ad65f3

(closes issue #16991)
Reported by: pprindeville
Patches: 
      with_netsnmp.patch.txt uploaded by twilson (license 396)
Tested by: twilson

Review: https://reviewboard.asterisk.org/r/739/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@272254 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Theoretically the ./configure script is a pure bourne-shell script.
Practically it may be run by bash if /bin/sh is not good enough. But we should not count on it. See bug report for the gory details.

(closes issue #17485)
Patches:
      0001-remove-bashism-from-ast_check_pwlib.m4.patch uploaded by tzafrir (license 46)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@270184 65c4cc65-6c06-0410-ace0-fbb531ad65f3

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r267971 | tilghman | 2010-06-04 11:27:02 -0500 (Fri, 04 Jun 2010) | 2 lines
  
  As-fixiate the build process
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@267972 65c4cc65-6c06-0410-ace0-fbb531ad65f3

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@267819 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Cache sound tarfiles in a common directory, such that a clean reinstall does not force a re-download of the tarballs.

(closes issue #15370)
 Reported by: pprindeville
 Patches: 
       asterisk-trunk-bugid15370.patch uploaded by pprindeville (license 347)
 Tested by: pprindeville, tilghman, seanbright


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@263724 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Cleanup a bit more by getting rid of useless version defines. Also make library detection use passed CFLAGS.

(closes issue #17309)
 Reported by: stuarth


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  r214517 | tilghman | 2009-08-27 16:45:34 -0500 (Thu, 27 Aug 2009) | 7 lines
  
  Use autoconf to detect libcurl, as this enables cross-compilation checks, something we didn't allow before.
  (closes issue #15714)
   Reported by: pprindeville
   Patches: 
         20090813__issue15714.diff.txt uploaded by tilghman (license 14)
   Tested by: pprindeville
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  r214436 | tilghman | 2009-08-27 11:53:58 -0500 (Thu, 27 Aug 2009) | 2 lines
  
  One more build system change, to make the descriptions look better, if we have better information.
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  r214357 | tilghman | 2009-08-27 11:03:50 -0500 (Thu, 27 Aug 2009) | 3 lines
  
  Make autoheader descriptions render correctly in our autoconfig.h file.
  (Figured out while working with issue #14906)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@214360 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Someone asked yesterday, "is there a good reason why we can't just put these
modules in Asterisk?".  After a brief discussion, as long as the modules are
clearly set aside in their own directory and not enabled by default, it is
perfectly fine.

For more information about why a module goes in addons, see README-addons.txt.

chan_ooh323 does not currently compile as it is behind some trunk API updates.
However, it will not build by default, so it should be okay for now.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@204413 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Defaulting to 'static' for the function scope was bad... so remove it.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@201090 65c4cc65-6c06-0410-ace0-fbb531ad65f3

The last changes to ast_gcc_attribute.m4 caused some problems checking for
various attributes, because the scope of the symbol the attribute is applied
to can be important; this patch allows the scope to be specified for the check.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@200985 65c4cc65-6c06-0410-ace0-fbb531ad65f3

The configure script tests for compiler attributes didn't actually enable
enough warnings or provide a proper test harness to determine whether the 
compiler supports the attribute in question or not; this caused gcc 4.1 to
report that it supports 'weakref', but it doesn't actually support it in the
way that is needed for our optional API mechanism. The new configure script
test will properly distinguish between full support and partial support
for this attribute, among others.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@200764 65c4cc65-6c06-0410-ace0-fbb531ad65f3

(closes issue #14988)
Reported by: tzafrir
Patches:
      configure.ac.diff uploaded by homesick (license 91)
      new_ast_check_osptk.m4 uploaded by homesick (license 91)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196946 65c4cc65-6c06-0410-ace0-fbb531ad65f3

(closes issue #14671)
 Reported by: Chainsaw
 Patches: 
       asterisk-1.6.0.6-toolcheck-libs-not-ldflags.patch uploaded by Chainsaw (license 723)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@192132 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Chan_h323 can now be compiled against both the previously supported versions of
OpenH323 as well as the current H.323 Plus (version 1.20.2). The configure
script has been modified to look in the default install location of h323 to
hopefully help avoid using the environment variables OPENH323DIR and PWLIBDIR.
Also, the CLI command "h323 show version" has been added which indicates which
version of h323 is in use.

(closes issue #11261)
Reported by: vhatz
Patches:
      asterisk-1.6.0.6-h323plus.patch uploaded by jthurman (license 614)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@182722 65c4cc65-6c06-0410-ace0-fbb531ad65f3

string.


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https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r180941 | qwell | 2009-03-10 17:02:18 -0500 (Tue, 10 Mar 2009) | 1 line
  
  Make things happier when using autoconf 2.62+
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@180944 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Several changes in PTLib have occurred requiring build time detection. Changes
accounted for include the library name change, config option change, install
location change, and a boolean type change which is handled by ast_ptlib.h.
Also, the sed check has been modified to properly work with autoconf >= 2.62.

(closes issue #14224)
Reported by: bergolth
Patches:
      asterisk-autoconf-sed.patch uploaded by bergolth (license 661)
      asterisk-pwlib-v3.patch uploaded by bergolth (license 661)
Tested by: jpeeler


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https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r172438 | tilghman | 2009-01-29 16:54:29 -0600 (Thu, 29 Jan 2009) | 9 lines
  
  Lose the CAP_NET_ADMIN at every fork, instead of at startup.  Otherwise, if
  Asterisk runs as a non-root user and the administrator does a 'restart now',
  Asterisk loses the ability to set QOS on packets.
  (closes issue #14004)
   Reported by: nemo
   Patches: 
         20090105__bug14004.diff.txt uploaded by Corydon76 (license 14)
   Tested by: Corydon76
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@172441 65c4cc65-6c06-0410-ace0-fbb531ad65f3

improve handling of API calls provided by loaded modules through use of some GCC features; this makes app_stack's usage of AGI APIs even cleaner, and will allow it to work 'as expected' either with or without res_agi being loaded

reviewed at http://reviewboard.digium.com/r/62



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not necessary, so I am reverting it



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@156612 65c4cc65-6c06-0410-ace0-fbb531ad65f3

macro. These missing calls were discovered when working on
timerfd support in a separate branch.



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