Build from sources: error: invalid conversion from ‘const void*’ to ‘void*’ [-fpermissive]

[cobraalloc]

sendReceiver.cpp:136:51: error: invalid conversion from ‘const void*’ to ‘void*’ [-fpermissive]    

BIO* cbio = BIO_new_mem_buf(mypem, sizeof(mypem));

/usr/include/openssl/bio.h:668:6: error:   initializing argument 1 of ‘BIO* BIO_new_mem_buf(void*, int)’ [-fpermissive]
 BIO *BIO_new_mem_buf(void *buf, int len);

FULL ERROR LOG

Scanning dependencies of target anonfile
[ 20%] Building CXX object CMakeFiles/anonfile.dir/helpers/helpers.cpp.o
[ 40%] Building CXX object CMakeFiles/anonfile.dir/sendReceiver/sendReceiver.cpp.o
[ 60%] Building CXX object CMakeFiles/anonfile.dir/json_handler/JHandler.cpp.o
[ 80%] Building CXX object CMakeFiles/anonfile.dir/main.cpp.o
/home/travis/build/0x000N3X4N/anonfile/helpers/helpers.cpp: In static member function ‘static std::string Helpers::readFromFile(std::ifstream&)’:
/home/travis/build/0x000N3X4N/anonfile/helpers/helpers.cpp:35:50: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘std::basic_string<char>::size_type {aka long unsigned int}’ [-Wformat=]
     printf("Size of input file: %d\n", tmp.size());
                                                  ^
/home/travis/build/0x000N3X4N/anonfile/sendReceiver/sendReceiver.cpp: In static member function ‘static CURLcode SendReceiver::sslctx_function(CURL*, void*, void*)’:
/home/travis/build/0x000N3X4N/anonfile/sendReceiver/sendReceiver.cpp:136:51: error: invalid conversion from ‘const void*’ to ‘void*’ [-fpermissive]
   BIO* cbio = BIO_new_mem_buf(mypem, sizeof(mypem));
                                                   ^
In file included from /usr/include/openssl/ssl.h:152:0,
                 from /home/travis/build/0x000N3X4N/anonfile/sendReceiver/sendReceiver.h:10,
                 from /home/travis/build/0x000N3X4N/anonfile/sendReceiver/sendReceiver.cpp:1:
/usr/include/openssl/bio.h:668:6: error:   initializing argument 1 of ‘BIO* BIO_new_mem_buf(void*, int)’ [-fpermissive]
 BIO *BIO_new_mem_buf(void *buf, int len);
      ^
make[2]: *** [CMakeFiles/anonfile.dir/sendReceiver/sendReceiver.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/anonfile.dir/all] Error 2
make: *** [all] Error 2
The command "make -j4" exited with 2.

For resolve this issue you need to install openssl version greater than OpenSSL 1.0.1f 6 Jan 2014 or open the file named sendReceiver.cpp and jump to line 113 static const char mypem[] = and delete const modifier, after the changes the line should look like static char mypem[] =.
Save and rebuild.