On Wednesday, 8 January 2014 at 01:27:28 UTC, Walter Bright wrote:
It's not that hard. Use the -betterC switch to prevent
ModuleInfo records and their dependencies from being emitted,
and then you can write D code that has zero dependence on
druntime or phobos.
...until you declare a struct. I find the -betterC switch to be
totally useless. If you are just toying, there's no module info
anyway:
extern(C) {
void _d_run_main() {} // why is this required now????
void* _d_dso_registry;
void _start() {
}
}
dmd -c *.d -defaultlib= -debuglib=
gcc -m32 *.o -nostdlib
success. Add "struct Test{}" and:
Error: ModuleInfo not found. object.d may be incorrectly
installed or corrupt.
OK, add -betterC:
Error: TypeInfo not found. object.d may be incorrectly installed
or corrupt, compile with -v switch
If you do use an object.d with it defined to get past the
compiler, it doesn't help much as the linker complains anyway:
test.o:(.data._D20TypeInfo_S4test4Test6__initZ+0x0): undefined
reference to `_D15TypeInfo_Struct6__vtblZ'
So my verdict is -betterC is pretty useless. If it got past the
TypeInfo stuff the same way it gets past ModuleInfo though, then
we'd be cooking with gas. That potentially gives a language that
is legitimately a better C. But without structs, bah.
