4.4 Creating Binary EFI Images - $(MAKE) stage
Binary EFI images are created in two steps; the first step uses 3rd party assemblers, compilers and linkers to generate a PE32/PE32+/COFF image file, while the second step uses code from the GenFw application provided in EDK II to modify the PE32/PE32+/COFF image file to create an EFI file with an EFI_IMAGE_SECTION_HEADER structure. Since different EFI_SECTION types may require different values for alignment offsets, the GenFw tool must specify the component type, which is derived from the INF metadata's ModuleType statement.
This stage is executed by the build tool calling either the NMAKE or the MAKE tool for each module. The Makefiles (Makefile or GNUMakefile) are created during the metadata processing stage. The Makefiles specify the compiler, linker, assembler, and GenFw tool commands and options. Once all modules have been built by the 3rd party tools, the build tool will call the GenFds application to initiate the third stage of a build, if there is a Flash Definition File (FDF) specified in the DSC file. If no FDF file is specified, then the build will terminate with the creation of individual module EFI formatted (EFI) images.
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