Paho MQTT throws undefined reference error during compile
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I have a problem using Paho MQTT client in C.
I downloaded the pre built binaries for my system (Windows 10 64) from their projects page. I unpacked the zip file to a folder in the documents folder, where I also created a .c file with the example at the bottom of the Paho product page. My editor is atom and my compiler is gcc.
When I tried to compile it in Atom, I got this error:
undefined reference to MQTTClient_create'
So I went searching and found plenty of topics, but I still couldn't figure out, how to resolve this issue. From this stackoverflow topic I gather that it's a linker problem and that I need to link the files during compile, so here's what I tried:
gcc MQTT.c -L "C:UsersPeteDocumentsMQTT on CExamplesPaholib" -l paho-mqtt3c
Which still gives me the same undefined reference error. When I try to link to the dll of the same name, the compiler does not find the file.
Can anyone point me in the right direction, please?
Any help is appreciated!
windows-10 eclipse c mqtt
asked Jan 3 at 22:11
PetePete
309
migrated from superuser.com Jan 4 at 10:31
This question came from our site for computer enthusiasts and power users.
add a comment |
I have a problem using Paho MQTT client in C.
I downloaded the pre built binaries for my system (Windows 10 64) from their projects page. I unpacked the zip file to a folder in the documents folder, where I also created a .c file with the example at the bottom of the Paho product page. My editor is atom and my compiler is gcc.
When I tried to compile it in Atom, I got this error:
undefined reference to MQTTClient_create'
So I went searching and found plenty of topics, but I still couldn't figure out, how to resolve this issue. From this stackoverflow topic I gather that it's a linker problem and that I need to link the files during compile, so here's what I tried:
gcc MQTT.c -L "C:UsersPeteDocumentsMQTT on CExamplesPaholib" -l paho-mqtt3c
Which still gives me the same undefined reference error. When I try to link to the dll of the same name, the compiler does not find the file.
Can anyone point me in the right direction, please?
Any help is appreciated!
windows-10 eclipse c mqtt
asked Jan 3 at 22:11
PetePete
309
migrated from superuser.com Jan 4 at 10:31
This question came from our site for computer enthusiasts and power users.
add a comment |
I have a problem using Paho MQTT client in C.
I downloaded the pre built binaries for my system (Windows 10 64) from their projects page. I unpacked the zip file to a folder in the documents folder, where I also created a .c file with the example at the bottom of the Paho product page. My editor is atom and my compiler is gcc.
When I tried to compile it in Atom, I got this error:
undefined reference to MQTTClient_create'
So I went searching and found plenty of topics, but I still couldn't figure out, how to resolve this issue. From this stackoverflow topic I gather that it's a linker problem and that I need to link the files during compile, so here's what I tried:
gcc MQTT.c -L "C:UsersPeteDocumentsMQTT on CExamplesPaholib" -l paho-mqtt3c
Which still gives me the same undefined reference error. When I try to link to the dll of the same name, the compiler does not find the file.
Can anyone point me in the right direction, please?
Any help is appreciated!
windows-10 eclipse c mqtt
asked Jan 3 at 22:11
PetePete
309
I have a problem using Paho MQTT client in C.
I downloaded the pre built binaries for my system (Windows 10 64) from their projects page. I unpacked the zip file to a folder in the documents folder, where I also created a .c file with the example at the bottom of the Paho product page. My editor is atom and my compiler is gcc.
When I tried to compile it in Atom, I got this error:
undefined reference to MQTTClient_create'
So I went searching and found plenty of topics, but I still couldn't figure out, how to resolve this issue. From this stackoverflow topic I gather that it's a linker problem and that I need to link the files during compile, so here's what I tried:
gcc MQTT.c -L "C:UsersPeteDocumentsMQTT on CExamplesPaholib" -l paho-mqtt3c
Which still gives me the same undefined reference error. When I try to link to the dll of the same name, the compiler does not find the file.
Can anyone point me in the right direction, please?
Any help is appreciated!
windows-10 eclipse c mqtt
windows-10 eclipse c mqtt
asked Jan 3 at 22:11
PetePete
309
asked Jan 3 at 22:11
PetePete
309
asked Jan 3 at 22:11
PetePete
309
asked Jan 3 at 22:11
PetePete
309
asked Jan 3 at 22:11
PetePete
309
309
migrated from superuser.com Jan 4 at 10:31
This question came from our site for computer enthusiasts and power users.
migrated from superuser.com Jan 4 at 10:31
This question came from our site for computer enthusiasts and power users.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
- Copy the
dllfile intoc:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
answered Jan 8 at 18:24
GeoRebGeoReb
77
I had not registered the dll in Windows. When I ran your command forpaho-mqtt3c.dllI got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.
– Pete
Jan 8 at 20:00
add a comment |
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
answered Jan 11 at 0:03
PetePete
309
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
- Copy the
dllfile intoc:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
answered Jan 8 at 18:24
GeoRebGeoReb
77
I had not registered the dll in Windows. When I ran your command forpaho-mqtt3c.dllI got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.
– Pete
Jan 8 at 20:00
add a comment |
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
- Copy the
dllfile intoc:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
answered Jan 8 at 18:24
GeoRebGeoReb
77
I had not registered the dll in Windows. When I ran your command forpaho-mqtt3c.dllI got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.
– Pete
Jan 8 at 20:00
add a comment |
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
- Copy the
dllfile intoc:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
answered Jan 8 at 18:24
GeoRebGeoReb
77
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
- Copy the
dllfile intoc:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
answered Jan 8 at 18:24
GeoRebGeoReb
77
answered Jan 8 at 18:24
GeoRebGeoReb
77
answered Jan 8 at 18:24
GeoRebGeoReb
77
answered Jan 8 at 18:24
GeoRebGeoReb
77
77
I had not registered the dll in Windows. When I ran your command forpaho-mqtt3c.dllI got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.
– Pete
Jan 8 at 20:00
add a comment |
I had not registered the dll in Windows. When I ran your command forpaho-mqtt3c.dllI got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.
– Pete
Jan 8 at 20:00
I had not registered the dll in Windows. When I ran your command for
paho-mqtt3c.dll I got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.– Pete
Jan 8 at 20:00
I had not registered the dll in Windows. When I ran your command for
paho-mqtt3c.dll I got: "The module "paho-mqtt3c.dll" was loaded but the entry-point DllRegisterServer was not found." It seems to work for the ...cs.dll, but the compiler gives me the same error as before.– Pete
Jan 8 at 20:00
add a comment |
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
answered Jan 11 at 0:03
PetePete
309
add a comment |
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
answered Jan 11 at 0:03
PetePete
309
add a comment |
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
answered Jan 11 at 0:03
PetePete
309
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
answered Jan 11 at 0:03
PetePete
309
answered Jan 11 at 0:03
PetePete
309
answered Jan 11 at 0:03
PetePete
309
answered Jan 11 at 0:03
PetePete
309
309
add a comment |
add a comment |
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