Re: [virt-viewer v2 1/5] Use GLIB_VERSION_MAX_ALLOWED

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On Wed, Feb 24, 2016 at 8:26 AM, Pavel Grunt <pgrunt@xxxxxxxxxx> wrote:
> On Wed, 2016-02-24 at 08:04 +0100, Fabiano Fidêncio wrote:
>> In order to avoid using a too new GLib API.
>>
>> Signed-off-by: Fabiano Fidêncio <fidencio@xxxxxxxxxx>
>> ---
>>  acinclude.m4 |  2 +-
>>  configure.ac | 10 +++++++++-
>>  2 files changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/acinclude.m4 b/acinclude.m4
>> index a9561c4..30d5cc1 100644
>> --- a/acinclude.m4
>> +++ b/acinclude.m4
>> @@ -34,7 +34,7 @@ AC_DEFUN([VIRT_VIEWER_COMPILE_WARNINGS],[
>>       try_compiler_flags="$try_compiler_flags -Wall -Wmissing-
>> prototypes -std=c99 -Wnested-externs -Wpointer-arith"
>>          try_compiler_flags="$try_compiler_flags -Wextra -Wshadow
>> -Wcast-align -Wwrite-strings -Waggregate-return"
>>          # Removed -Wstrict-prototypes to avoid GTK bug
>> -     try_compiler_flags="$try_compiler_flags -Winline
>> -Wredundant-decls -Wno-sign-compare -Wno-deprecated-declarations"
>> +     try_compiler_flags="$try_compiler_flags -Winline
>> -Wredundant-decls -Wdeprecated-declarations -Wno-sign-compare"
>>       if test "$enable_compile_warnings" = "error" ; then
>>           try_compiler_flags="$try_compiler_flags -Werror"
> This change should not be here.

Actually, it should.
Any function used from a newer version of glib will be treated as
"deprecated" and then a warning will be thrown saying that the
function is newer than the maximum allowed version.
Without setting the deprecated-declarations warning, this whole change
is useless. (And took me a while to find out what was going wrong
...).
Does it make sense for you?

>
>>       fi
>> diff --git a/configure.ac b/configure.ac
>> index 5503d46..437f6e4 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> @@ -12,7 +12,10 @@ AC_CANONICAL_HOST
>>  m4_ifndef([AM_SILENT_RULES], [m4_define([AM_SILENT_RULES],[])])
>>  AM_SILENT_RULES([yes])
>>
>> -GLIB2_REQUIRED="2.38.0"
>> +# Keep these two definitions in agreement.
>> +GLIB2_REQUIRED="2.38"
>> +GLIB2_ENCODED_VERSION="GLIB_VERSION_2_38"
>> +
>>  LIBXML2_REQUIRED="2.6.0"
>>  LIBVIRT_REQUIRED="0.10.0"
>>  GTK_REQUIRED="3.10"
>> @@ -94,6 +97,11 @@ GLIB_MKENUMS=`$PKG_CONFIG --variable=glib_mkenums
>> glib-2.0`
>>  AC_SUBST(GLIB_MKENUMS)
>>
>>  PKG_CHECK_MODULES(GLIB2, glib-2.0 >= $GLIB2_REQUIRED gio-2.0
>> gthread-2.0 gmodule-export-2.0)
>> +GLIB2_CFLAGS="$GLIB2_CFLAGS
>> -DGLIB_VERSION_MIN_REQUIRED=$GLIB2_ENCODED_VERSION"
>> +GLIB2_CFLAGS="$GLIB2_CFLAGS
>> -DGLIB_VERSION_MAX_ALLOWED=$GLIB2_ENCODED_VERSION"
>> +AC_SUBST(GLIB2_CFLAGS)
>> +AC_SUBST(GLIB2_LIBS)
>> +
>>  PKG_CHECK_MODULES(LIBXML2, libxml-2.0 >= $LIBXML2_REQUIRED)
>>
>>  AC_ARG_WITH([libvirt],
>
> Ack with the change.
>
> Pavel
>
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-- 
Fabiano Fidêncio

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