Missing g_object_unref

Missing g_object_unref

[Vlado]

Hello.

Can somebody give advice what library defines g_object_unref function 
call, please?
I use x86_64 Cygwin.

I would like to build rrdtool 1.6.0. Building it as Windows native app 
is near impossible. Building it in Cygwin is much less pain and I hope 
the "undefined reference to `g_object_unref'" is the last obstacle.
In Debian I found that g_object_unref is defined in libgobject-2.0.a, 
but there is no library libgobject-2.0.a in Cygwin.

Vlado



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Re: Missing g_object_unref

[Vlado]

On 2.4.2017 11:47, Vlado wrote:
> Hello.
>
> Can somebody give advice what library defines g_object_unref function 
> call, please?
> I use x86_64 Cygwin.
>
> I would like to build rrdtool 1.6.0. Building it as Windows native app 
> is near impossible. Building it in Cygwin is much less pain and I hope 
> the "undefined reference to `g_object_unref'" is the last obstacle.
> In Debian I found that g_object_unref is defined in libgobject-2.0.a, 
> but there is no library libgobject-2.0.a in Cygwin.
>
> Vlado
>
>
Answer is: Library libgobject-2.0.dll.a is a part of libglib2.0-devel.

I have installed libglib2.0-devel version 2.50.3-1 now, I added 
-llibglib-2.0 -llibgobject-2.0 to LIBS and still have

Making all in src
make[1]: Entering directory '/usr/src/rrdtool-1.6.0/src'
make  all-am
make[2]: Entering directory '/usr/src/rrdtool-1.6.0/src'
   CCLD     rrdtool.exe
./.libs/librrd.a(librrd_la-rrd_graph.o):rrd_graph.c:(.text+0xcb2): 
undefined reference to `g_object_unref'
./.libs/librrd.a(librrd_la-rrd_graph.o):rrd_graph.c:(.text+0xcb2): 
relocation truncated to fit: R_X86_64_PC32 against undefined symbol 
`g_object_unref'
./.libs/librrd.a(librrd_la-rrd_graph.o):rrd_graph.c:(.text+0x14023): 
undefined reference to `g_object_unref'
./.libs/librrd.a(librrd_la-rrd_graph.o):rrd_graph.c:(.text+0x14023): 
relocation truncated to fit: R_X86_64_PC32 against undefined symbol 
`g_object_unref'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:715: rrdtool.exe] Error 1
make[2]: Leaving directory '/usr/src/rrdtool-1.6.0/src'
make[1]: *** [Makefile:552: all] Error 2
make[1]: Leaving directory '/usr/src/rrdtool-1.6.0/src'
make: *** [Makefile:557: all-recursive] Error 1

Investigating objects in libgobject-2.0:

$ nm --print-file-name --defined-only lib-extract/libgobject-2.0/* | 
grep -F g_object_unref
d000165.o:0000000000000000 I __imp_g_object_unref
d000165.o:0000000000000000 T g_object_unref

"T" means symbol is defined in TEXT (code).

Is the "undefined reference to `g_object_unref'" result of "relocation 
truncated to fit"?



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Re: Missing g_object_unref

[Ken Brown]

On 4/2/2017 8:17 AM, Vlado wrote:
> On 2.4.2017 11:47, Vlado wrote:
>> Hello.
>>
>> Can somebody give advice what library defines g_object_unref function
>> call, please?
>> I use x86_64 Cygwin.
>>
>> I would like to build rrdtool 1.6.0. Building it as Windows native app
>> is near impossible. Building it in Cygwin is much less pain and I hope
>> the "undefined reference to `g_object_unref'" is the last obstacle.
>> In Debian I found that g_object_unref is defined in libgobject-2.0.a,
>> but there is no library libgobject-2.0.a in Cygwin.
>>
>> Vlado
>>
>>
> Answer is: Library libgobject-2.0.dll.a is a part of libglib2.0-devel.
>
> I have installed libglib2.0-devel version 2.50.3-1 now, I added
> -llibglib-2.0 -llibgobject-2.0 to LIBS

Wrong syntax.  This should be "-lgobject-2.0 -lglib-2.0":

$ pkg-config --libs gobject-2.0
-lgobject-2.0 -lglib-2.0 -lintl

Ken

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Re: Missing g_object_unref

[Vlado]

On 2.4.2017 18:26, Ken Brown wrote:
> Wrong syntax.  This should be "-lgobject-2.0 -lglib-2.0":

Thanks, it helped.

Vlado

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