I am trying to compile the example from the docs https://docs.python.org/2.7/extending/embedding.html and my code looks exactly like the one under 5.1:
#include
I replicated the same problem on Lubuntu14.04 32bit virtual machine running on Win7 machine.
I did the following things to replicate the problem in the first place where the C++ code is written in Eclipse C/C++ IDE. Defined a C++ Eclipse project titled "test". The source file contains the following C++ code which is the same as mentioned above by Miguellissimo.
C++ Code ::
#include "python2.7/Python.h"
int main(int argc, char *argv[]) {
Py_Initialize();
PyRun_SimpleString("print \"Hello, world!\"");
Py_Finalize();
return 0;
}
Errors ::
test.o: In function main':
/home/ros/workspace/test/src/test.cpp:15: undefined reference to
Py_Initialize'
/home/ros/workspace/test/src/test.cpp:17: undefined reference to PyRun_SimpleStringFlags'
/home/ros/workspace/test/src/test.cpp:18: undefined reference to
Py_Finalize'
collect2: error: ld returned 1 exit status
The output of the following commands was the same as mentioned before by Miguellissimo,
ros@rosPC:~/workspace/test/src$ python2.7-config --cflags
-I/usr/include/python2.7 -I/usr/include/i386-linux-gnu/python2.7 -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes
ros@rosPC:~/workspace/test/src$ python2.7-config --ldflags
-L/usr/lib/python2.7/config-i386-linux-gnu -L/usr/lib -lpthread -ldl -lutil -lm -lpython2.7 -Xlinker -export-dynamic -Wl,-O1 -Wl,-Bsymbolic-functions
Project Properties of C++ Eclipse Project titled "test"::
Inside, I had the following C++ Build Settings
GCC C++ Compiler
Command: g++
All options: -I/opt/ros/indigo/include -O0 -g3 -Wall -c -fmessage-length=0
Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Includes
include paths: /opt/ros/indigo/include
GCC C Compiler
Command: gcc
All options: -I/opt/ros/indigo/include -I/usr/lib/python2.7/config-i386-linux-gnu -O0 -g3 -Wall -c -fmessage-length=0
Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Includes
include paths: /opt/ros/indigo/include
/usr/lib/python2.7/config-i386-linux-gnu
GCC C++ Linker
Command: g++
All options: Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Libraries:
Libraries(-I):
Library search path(-L):
Solution::
Specified the following C++ Build Settings in the Project Properties of C++ Eclipse Project "test"
GCC C++ Compiler
Command: g++
All options: -I/opt/ros/indigo/include -I/usr/include/python2.7 -O0 -g3 -Wall -c -fmessage-length=0
Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Includes
include paths: /opt/ros/indigo/include
/usr/include/python2.7
GCC C Compiler
Command: gcc
All options: -I/opt/ros/indigo/include -I/usr/include/python2.7 -O0 -g3 -Wall -c -fmessage-length=0
Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Includes
include paths: /opt/ros/indigo/include
/usr/include/python2.7
GCC C++ Linker
Command: g++
All options: -L/usr/lib/python2.7/config-i386-linux-gnu
Command line pattern: ${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}
Libraries:
Libraries(-I): python2.7
Library search path(-L): /usr/lib/python2.7/config-i386-linux-gnu
Result :: Linker errors which resulted previously from the compilation of C++ Eclipse project doesn't occur anymore.