Some mkldscript improvements

[Dragorn421]

Implementation of some of the things I suggested in my review in zeldaret#1204

Apart from the usage sentences, this changes the build/ldscript.txt from (excerpt)

	_buffersSegmentRomStartTemp = _RomSize;
	_buffersSegmentRomStart = _buffersSegmentRomStartTemp;
	..buffers : AT(_buffersSegmentRomStart)
	{
		_buffersSegmentStart = .;

		build/segments/buffers.o (.text)
		build/segments/buffers.o (.data)
		build/segments/buffers.o (.rodata)
		_buffersSegmentOvlStart = .;
		_buffersSegmentOvlEnd = .;
		_buffersSegmentOvlSize = ABSOLUTE(_buffersSegmentOvlEnd - _buffersSegmentOvlStart);
	}
	_buffersSegmentRomSize = ABSOLUTE(_buffersSegmentOvlEnd - _buffersSegmentTextStart);
	_RomSize += _buffersSegmentRomSize;
	_buffersSegmentRomEndTemp = _RomSize;
	_buffersSegmentRomEnd = _buffersSegmentRomEndTemp;
	..buffers.bss (NOLOAD) :
	{
		build/segments/buffers.o (.bss)
	}
		_buffersSegmentEnd = .;
		_buffersSegmentSize = ABSOLUTE(_buffersSegmentEnd - _buffersSegmentStart);


	_ovl_titleSegmentRomStartTemp = _RomSize;
	_ovl_titleSegmentRomStart = _ovl_titleSegmentRomStartTemp;
	..ovl_title 0x80800000 : AT(_ovl_titleSegmentRomStart)
	{
		_ovl_titleSegmentStart = .;

		build/segments/ovl_title.o (.text)
		build/segments/ovl_title.o (.data)
		build/segments/ovl_title.o (.rodata)
		_ovl_titleSegmentOvlStart = .;
		build/segments/ovl_title.reloc.o (.ovl)
		_ovl_titleSegmentOvlEnd = .;
		_ovl_titleSegmentOvlSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentOvlStart);
	}
	_ovl_titleSegmentRomSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentTextStart);
	_RomSize += _ovl_titleSegmentRomSize;
	_ovl_titleSegmentRomEndTemp = _RomSize;
	_ovl_titleSegmentRomEnd = _ovl_titleSegmentRomEndTemp;
	..ovl_title.bss (NOLOAD) :
	{
		build/segments/ovl_title.o (.bss)
	}
		_ovl_titleSegmentEnd = .;
		_ovl_titleSegmentSize = ABSOLUTE(_ovl_titleSegmentEnd - _ovl_titleSegmentStart);

to

	_buffersSegmentRomStartTemp = _RomSize;
	_buffersSegmentRomStart = _buffersSegmentRomStartTemp;
	_buffersSegmentStart = .;

	..buffers _buffersSegmentStart : AT(_buffersSegmentRomStart)
	{
		build/segments/buffers.o (.text)
		build/segments/buffers.o (.data)
		build/segments/buffers.o (.rodata)
	}

	_buffersSegmentRomSize = ABSOLUTE(_buffersSegmentRoDataEnd - _buffersSegmentTextStart);
	_RomSize += _buffersSegmentRomSize;
	_buffersSegmentRomEndTemp = _RomSize;
	_buffersSegmentRomEnd = _buffersSegmentRomEndTemp;

	..buffers.bss (NOLOAD) :
	{
		build/segments/buffers.o (.bss)
	}

	_buffersSegmentEnd = .;
	_buffersSegmentSize = ABSOLUTE(_buffersSegmentEnd - _buffersSegmentStart);


	_ovl_titleSegmentRomStartTemp = _RomSize;
	_ovl_titleSegmentRomStart = _ovl_titleSegmentRomStartTemp;
	_ovl_titleSegmentStart = 0x80800000;

	..ovl_title _ovl_titleSegmentStart : AT(_ovl_titleSegmentRomStart)
	{
		build/segments/ovl_title.o (.text)
		build/segments/ovl_title.o (.data)
		build/segments/ovl_title.o (.rodata)

		_ovl_titleSegmentOvlStart = .;
		build/segments/ovl_title.reloc.o (.ovl)
		_ovl_titleSegmentOvlEnd = .;
		_ovl_titleSegmentOvlSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentOvlStart);
	}

	_ovl_titleSegmentRomSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentTextStart);
	_RomSize += _ovl_titleSegmentRomSize;
	_ovl_titleSegmentRomEndTemp = _RomSize;
	_ovl_titleSegmentRomEnd = _ovl_titleSegmentRomEndTemp;

	..ovl_title.bss (NOLOAD) :
	{
		build/segments/ovl_title.o (.bss)
	}

	_ovl_titleSegmentEnd = .;
	_ovl_titleSegmentSize = ABSOLUTE(_ovl_titleSegmentEnd - _ovl_titleSegmentStart);

diff:

 	_buffersSegmentRomStartTemp = _RomSize;
 	_buffersSegmentRomStart = _buffersSegmentRomStartTemp;
-	..buffers : AT(_buffersSegmentRomStart)
-	{
-		_buffersSegmentStart = .;
+	_buffersSegmentStart = .;
 
+	..buffers _buffersSegmentStart : AT(_buffersSegmentRomStart)
+	{
 		build/segments/buffers.o (.text)
 		build/segments/buffers.o (.data)
 		build/segments/buffers.o (.rodata)
-		_buffersSegmentOvlStart = .;
-		_buffersSegmentOvlEnd = .;
-		_buffersSegmentOvlSize = ABSOLUTE(_buffersSegmentOvlEnd - _buffersSegmentOvlStart);
 	}
-	_buffersSegmentRomSize = ABSOLUTE(_buffersSegmentOvlEnd - _buffersSegmentTextStart);
+
+	_buffersSegmentRomSize = ABSOLUTE(_buffersSegmentRoDataEnd - _buffersSegmentTextStart);
 	_RomSize += _buffersSegmentRomSize;
 	_buffersSegmentRomEndTemp = _RomSize;
 	_buffersSegmentRomEnd = _buffersSegmentRomEndTemp;
+
 	..buffers.bss (NOLOAD) :
 	{
 		build/segments/buffers.o (.bss)
 	}
-		_buffersSegmentEnd = .;
-		_buffersSegmentSize = ABSOLUTE(_buffersSegmentEnd - _buffersSegmentStart);
+
+	_buffersSegmentEnd = .;
+	_buffersSegmentSize = ABSOLUTE(_buffersSegmentEnd - _buffersSegmentStart);
 
 
 	_ovl_titleSegmentRomStartTemp = _RomSize;
 	_ovl_titleSegmentRomStart = _ovl_titleSegmentRomStartTemp;
-	..ovl_title 0x80800000 : AT(_ovl_titleSegmentRomStart)
-	{
-		_ovl_titleSegmentStart = .;
+	_ovl_titleSegmentStart = 0x80800000;
 
+	..ovl_title _ovl_titleSegmentStart : AT(_ovl_titleSegmentRomStart)
+	{
 		build/segments/ovl_title.o (.text)
 		build/segments/ovl_title.o (.data)
 		build/segments/ovl_title.o (.rodata)
+
 		_ovl_titleSegmentOvlStart = .;
 		build/segments/ovl_title.reloc.o (.ovl)
 		_ovl_titleSegmentOvlEnd = .;
 		_ovl_titleSegmentOvlSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentOvlStart);
 	}
+
 	_ovl_titleSegmentRomSize = ABSOLUTE(_ovl_titleSegmentOvlEnd - _ovl_titleSegmentTextStart);
 	_RomSize += _ovl_titleSegmentRomSize;
 	_ovl_titleSegmentRomEndTemp = _RomSize;
 	_ovl_titleSegmentRomEnd = _ovl_titleSegmentRomEndTemp;
+
 	..ovl_title.bss (NOLOAD) :
 	{
 		build/segments/ovl_title.o (.bss)
 	}
-		_ovl_titleSegmentEnd = .;
-		_ovl_titleSegmentSize = ABSOLUTE(_ovl_titleSegmentEnd - _ovl_titleSegmentStart);
+
+	_ovl_titleSegmentEnd = .;
+	_ovl_titleSegmentSize = ABSOLUTE(_ovl_titleSegmentEnd - _ovl_titleSegmentStart);

[Thar0]

Thanks! 🎉