* undefined reference to libquadmath routines
@ 2011-06-07 11:17 Syed Bilal Mehdi
2011-06-07 13:46 ` Ian Lance Taylor
0 siblings, 1 reply; 6+ messages in thread
From: Syed Bilal Mehdi @ 2011-06-07 11:17 UTC (permalink / raw)
To: gcc-help
I just got gcc 4.6 built successfully. I was trying libquadmath with the
following test code:
http://gcc.gnu.org/onlinedocs/libquadmath/quadmath_005fsnprintf.html#quadmath_005fsnprintf
but I get the following errors:
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:13:
undefined reference to `sqrtq(__float128)'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:14:
undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
...)'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
...)'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:22:
undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
...)'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:28:
undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
...)'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
...)'
What am I missing here. I tried specifying -lquadmath but that didn't help!!
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: undefined reference to libquadmath routines
2011-06-07 11:17 undefined reference to libquadmath routines Syed Bilal Mehdi
@ 2011-06-07 13:46 ` Ian Lance Taylor
2011-06-07 19:20 ` Syed Bilal Mehdi
0 siblings, 1 reply; 6+ messages in thread
From: Ian Lance Taylor @ 2011-06-07 13:46 UTC (permalink / raw)
To: Syed Bilal Mehdi; +Cc: gcc-help
Syed Bilal Mehdi <bilal.mehdi87@gmail.com> writes:
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:13:
> undefined reference to `sqrtq(__float128)'
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:14:
> undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
> ...)'
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
> undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
> ...)'
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:22:
> undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
> ...)'
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:28:
> undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
> ...)'
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
> undefined reference to `quadmath_snprintf(char*, unsigned int, char const*,
> ...)'
>
> What am I missing here. I tried specifying -lquadmath but that didn't help!!
The format of those errors tells me that you are calling these as C++
functions, but they are written in C. There is a missing extern "C"
somewhere.
In fact, it's in quadmath.h. That's a bug. Please file a bug report
for it. Thanks.
In the meantime, write this:
extern "C" {
#include "quadmath.h"
}
Ian
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: undefined reference to libquadmath routines
2011-06-07 13:46 ` Ian Lance Taylor
@ 2011-06-07 19:20 ` Syed Bilal Mehdi
2011-06-07 19:58 ` Jeffrey Walton
2011-06-08 0:00 ` Jonathan Wakely
0 siblings, 2 replies; 6+ messages in thread
From: Syed Bilal Mehdi @ 2011-06-07 19:20 UTC (permalink / raw)
To: gcc-help
That solved the problem. But now there is another problem. If I miss adding
-lfortran as external library, I get the following error during build of my
test code
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:15:
undefined reference to `sqrtq'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:16:
undefined reference to `quadmath_snprintf'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:20:
undefined reference to `quadmath_snprintf'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:24:
undefined reference to `quadmath_snprintf'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:30:
undefined reference to `quadmath_snprintf'
/site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:20:
undefined reference to `quadmath_snprintf'
And when I do add -lgfortran as external library, the build goes successful
but I get the following error during runtime
./test: error while loading shared libraries: libgfortran.so.3: cannot open
shared object file: No such file or directory
Is it a bug again? or am I missing something this time? and why is fortran
important here?
Ian Lance Taylor-3 wrote:
>
> Syed Bilal Mehdi <bilal.mehdi87@gmail.com> writes:
>
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:13:
>> undefined reference to `sqrtq(__float128)'
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:14:
>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>> const*,
>> ...)'
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>> const*,
>> ...)'
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:22:
>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>> const*,
>> ...)'
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:28:
>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>> const*,
>> ...)'
>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>> const*,
>> ...)'
>>
>> What am I missing here. I tried specifying -lquadmath but that didn't
>> help!!
>
> The format of those errors tells me that you are calling these as C++
> functions, but they are written in C. There is a missing extern "C"
> somewhere.
>
> In fact, it's in quadmath.h. That's a bug. Please file a bug report
> for it. Thanks.
>
> In the meantime, write this:
>
> extern "C" {
> #include "quadmath.h"
> }
>
> Ian
>
>
--
View this message in context: http://old.nabble.com/undefined-reference-to-libquadmath-routines-tp31790381p31794507.html
Sent from the gcc - Help mailing list archive at Nabble.com.
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: undefined reference to libquadmath routines
2011-06-07 19:20 ` Syed Bilal Mehdi
@ 2011-06-07 19:58 ` Jeffrey Walton
2011-06-08 0:00 ` Jonathan Wakely
1 sibling, 0 replies; 6+ messages in thread
From: Jeffrey Walton @ 2011-06-07 19:58 UTC (permalink / raw)
To: Syed Bilal Mehdi; +Cc: gcc-help
On Tue, Jun 7, 2011 at 2:40 PM, Syed Bilal Mehdi
<bilal.mehdi87@gmail.com> wrote:
>
> That solved the problem. But now there is another problem. If I miss adding
> -lfortran as external library, I get the following error during build of my
> test code
>
> [SNIP]
> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:20:
> undefined reference to `quadmath_snprintf'
Then don't do that ;)
> And when I do add -lgfortran as external library, the build goes successful
> but I get the following error during runtime
>
> ./test: error while loading shared libraries: libgfortran.so.3: cannot open
> shared object file: No such file or directory
>
> Is it a bug again? or am I missing something this time? and why is fortran
> important here?
Is libgfortran.so installed and available? `whereis libgfortran.so` or
`file libgfortran.so` should let you know if its installed. `ldconfig
-p | grep -i libgfortran` should tell you if its available.
Jeff
>
> Ian Lance Taylor-3 wrote:
>>
>> Syed Bilal Mehdi <bilal.mehdi87@gmail.com> writes:
>>
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:13:
>>> undefined reference to `sqrtq(__float128)'
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:14:
>>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>>> const*,
>>> ...)'
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
>>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>>> const*,
>>> ...)'
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:22:
>>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>>> const*,
>>> ...)'
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:28:
>>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>>> const*,
>>> ...)'
>>> /site/ae/shares/MotionLab/papers/pingpong/examples/LongDoublePrecisionTests/test.cpp:18:
>>> undefined reference to `quadmath_snprintf(char*, unsigned int, char
>>> const*,
>>> ...)'
>>>
>>> What am I missing here. I tried specifying -lquadmath but that didn't
>>> help!!
>>
>> The format of those errors tells me that you are calling these as C++
>> functions, but they are written in C. There is a missing extern "C"
>> somewhere.
>>
>> In fact, it's in quadmath.h. That's a bug. Please file a bug report
>> for it. Thanks.
>>
>> In the meantime, write this:
>>
>> extern "C" {
>> #include "quadmath.h"
>> }
>>
>> Ian
>>
>>
>
> --
> View this message in context: http://old.nabble.com/undefined-reference-to-libquadmath-routines-tp31790381p31794507.html
> Sent from the gcc - Help mailing list archive at Nabble.com.
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: undefined reference to libquadmath routines
2011-06-07 19:20 ` Syed Bilal Mehdi
2011-06-07 19:58 ` Jeffrey Walton
@ 2011-06-08 0:00 ` Jonathan Wakely
2011-06-09 4:52 ` Syed Bilal Mehdi
1 sibling, 1 reply; 6+ messages in thread
From: Jonathan Wakely @ 2011-06-08 0:00 UTC (permalink / raw)
To: Syed Bilal Mehdi; +Cc: gcc-help
On 7 June 2011 19:40, Syed Bilal Mehdi wrote:
>
> And when I do add -lgfortran as external library, the build goes successful
> but I get the following error during runtime
>
> ./test: error while loading shared libraries: libgfortran.so.3: cannot open
> shared object file: No such file or directory
See http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.how_to_set_paths
and the page it links to.
That is talking about the C++ runtime library but the same rules apply
to the other GCC runtime libraries.
> Is it a bug again? or am I missing something this time? and why is fortran
> important here?
I think libquadmath was added for gfortran and I assume it has a
dependency on it.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2011-06-07 11:17 undefined reference to libquadmath routines Syed Bilal Mehdi
2011-06-07 13:46 ` Ian Lance Taylor
2011-06-07 19:20 ` Syed Bilal Mehdi
2011-06-07 19:58 ` Jeffrey Walton
2011-06-08 0:00 ` Jonathan Wakely
2011-06-09 4:52 ` Syed Bilal Mehdi
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