4.5.6 Initializing Common Blocks

When building dynamic libraries, insure proper initialization of common blocks (by DATA or BLOCK DATA) by gathering the initialized common blocks into the same library, and referencing that library before all others.

For example:

demo% f95 -G -xcode=pic32 -o init.so blkdat1.f blkdat2.f blkdat3.f
demo% f95 -o prog main.f init.so otherlib1.so otherlib2.so

The first compilation creates a dynamic library from files that define common blocks and initialize them in BLOCK DATA units. The second compilation creates the executable binary, linking the compiled main program with the dynamic libraries required by the application. Note that the dynamic library that initializes all the common blocks appears first before all the other libraries. This insures the blocks are properly initialized.