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Embedding binary data into a C++ executable via two different methods.

Generating Data

make out/data.bin will generate binary data using src/datagen.cc

Method 1: xxd

xxd -i [binary file] > [header file] reads a binary file and produces a header file suitable for inclusion in C/C++.

make out/xxduser will produce a binary which includes out/data.bin through this method.

Method 2: linked object file

src/data.S is a custom assembly source which includes out/data.bin binary data directly. It can be built into an object file using make out/data.o.

The object file can be inspected using nm out/data.o:

0000000000000028 D _data_end
0000000000000028 D _data_size
0000000000000000 D _data_start

Finally, make out/externuser builds and links src/externuser.cc with the above object file.

Running it

make runall should print the following:

bin/externuser && bin/xxduser
0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9
0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9