elfrc elfrc project is a program which can turn arbitrary files into ELF object files.
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object ELF ELF object file converter resource compiler elfrc

elfrc Description

elfrc project is a program which can turn arbitrary files into ELF object files. elfrc project is a program which can turn arbitrary files into ELF object files which can then be linked into your program directly and accessed via simple, user-defined symbol names.For instance, it's possible to embed even huge (16MB+) files directly into the executable and then access the data in constant time without making the compiler or linker eat loads of memory.It's available under the BSD license. For details please consult the LICENSE file contained in the software package.CompilationThe only non-trivial dependency elfrc has are some ELF header files, other than that it should build out-of-the box on any system which uses ELF files. Any C compiler and the standard header files will do.Just run 'make' (GNU make works, so does FreeBSD make) to build the program.UsageHere's the usage line as given when invocing elfrc without any arguments:elfrc Here's what the arguments do:-o < filename > Store resulting ELF object in < filename >. If not given, no ELF object will be generated.-h < filename > Store C header file which can be used to access the resource data in < filename >. If not given, no header file will be generated.-v Be a little verbose about what's going on.In any case, the most important argument is < resfile > - the path to a resource file which can be parsed by elfrc. If no resource file is given, or if "-" (a dash) is given, the resources will be read from the standard input.A resource file is just a plain text file, each line in the file describing a resource to be compiled into the ELF output. Each line is expected to three fields, separated by tab characters: the type of the resource (can be either 'binary' or 'text'), the symbol name (this should be a valid C identifier) and the path to the file to be compiled in.Here's a sample resource file which makes the data of 'bigpicture.jpg' accessible via the 'imgdata' symbol and 'largetext' will contain the contents of '/home/user/book.txt':binary imgdata bigpicture.jpgtext largetext /home/user/book.txtThis little resource file could be saved as e.g. 'resfile.rc' and used with an elfrc invocation like $ elfrc -o resources.o resfile.rc to compile bigpicture.jpg and /home/user/book.txt into resources.o - which could then be linked into your program.If you intend to link the object file into a C or C++ program, you usually want to generate a corresponding header file as well, which you can then include into your sources to access the data easily: $ elfrc -o resources.o -h resources.h resfile.rc Here's how the resulting header file looks like:#ifndef H_5863573680128751#define H_5863573680128751#ifdef __cplusplusextern "C" {#endif/* Automatically generated by elfrc 0.7. Do not modify by hand. *//* bigpicture.jpg */extern const char imgdata;/* /home/user/book.txt */extern const char largetext;#ifdef __cplusplus} /* extern "C" */#endif#endif /* H_5863573680128751 */

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