alexandrumc

#!/bin/bash



touchfiles="
    touch $HOME/.dub/packages/phobos-master/phobos/std/file.d
    touch $HOME/.dub/packages/mir-optim-1.5.1/mir-optim/source/mir/optim/least_squares.d
    touch $HOME/.dub/packages/mir-cpuid-1.2.2/mir-cpuid/source/cpuid/x86_any.d
    touch $HOME/.dub/packages/mir-core-1.0.3/mir-core/source/mir/conv.d
    touch $HOME/.dub/packages/mir-3.2.0/mir/source/mir/model/lda/hoffman.d

alexandrumc

module x;

import y;

/*
Semantic analysis 1 = only TOP-LEVEL declarations are analyzed
By TOP-LEVEL declarations I understand: - functions (the header of the function, the parameters and the return type; 
                                                        *the body IS NOT included*)
                                        - global variables (templates instantiations included)
                                        - struct/classes/templates declarations

alexandrumc

Now let's see how the previous example correlates with compilation taking longer when using -unittest.

Besides the if(compiledWithUnittest) block from the needsCodegen() which prefers instantiations from root modules, there's another if(compiledWithUnittest) which enforces the treatment of non-root modules (imports) as root modules.

for reference: https://github.com/dlang/dmd/blob/f5f0b68b8537270fd70cb7fb27c703abd216377d/src/dmd/dtemplate.d#L7139-L7144

This means that if you have the following program:

module test;

alexandrumc

TWO ways: 1) dmd importer.d
          2) dmd -unittest importer.d

import importme;      // *importme.d* is opened and semantic analysis on *importme.d* begins; 
                      //  now you should follow the comments from *importme.d*

//imports are solved now; semantic analysis continues

void main() 
{ 

alexandrumc

import std.bitmanip;

struct MyStruct
{
    mixin(bitfields!(
        uint, "x", 2,
        uint, "", 6));

}

alexandrumc

gcc -Wp,-MD,drivers/net/.virtio_net_tmp.mod.o.d  
	-nostdinc 
	-isystem /usr/lib/gcc/x86_64-linux-gnu/7/include -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi 
	-I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h 
	-D__KERNEL__ -Wall -Wundef 
	-Wstrict-prototypes -Wno-trigraphs 
	-fno-strict-aliasing -fno-common -fshort-wchar 
	-Werror-implicit-function-declaration -Wno-format-security 
	-std=gnu89