Linking order

Strapping Scherzo · Post by **Strapping Scherzo** » Thu Jan 08, 2004 9:51 am

Does startup.o have to be the first in the list of object files when linking? I'm just curious if this is my booting problem.

nymus · Post by **nymus** » Thu Jan 08, 2004 10:03 am

is your program not "booting" or not "linking"?

I think it depends on the way your files reference each other.

If you have file1.c that calls functions from file2.c, file 1.c must come first in the link line. (I think)

Strapping Scherzo · Post by **Strapping Scherzo** » Thu Jan 08, 2004 10:12 am

It was not booting and I fixed it. It was the link order. Note to all programmers: startup.o must come first in the link command. It doesn't matter for serial upload because dc-load already has it's startup code in memory. I'm uploading a new pre-pre-pre-alpha of Sper Famicast to my website right now.

BlackAura · Post by **BlackAura** » Thu Jan 08, 2004 10:36 am

Are you using a custom makefile for this, by any chance? If you're using a makefile like the ones the KOS examples use, it's taken care of by the makefile template thingy that the makefile includes.

Arqueiro · Post by **Arqueiro** » Thu Jan 08, 2004 11:37 am

scherzo wrote:It was not booting and I fixed it. It was the link order. Note to all programmers: startup.o must come first in the link command. It doesn't matter for serial upload because dc-load already has it's startup code in memory. I'm uploading a new pre-pre-pre-alpha of Sper Famicast to my website right now.

good woek man !!! i see the news about this emulator ! vary good job!

do u already found one to program the ASM code ? this is a hard part of your work...

sorry but i dont know ASM

but i like to help you in other things if you want !

Strapping Scherzo · Post by **Strapping Scherzo** » Thu Jan 08, 2004 12:07 pm

BlackAura wrote:Are you using a custom makefile for this, by any chance? If you're using a makefile like the ones the KOS examples use, it's taken care of by the makefile template thingy that the makefile includes.

I'm using Dev-C++ configured to use a precompiled sh4 toolchain and KOS libs. I picked them up from links in this thread:
http://www.dcemulation.org/phpBB/viewtopic.php?t=38963
Dev-C++ lists the object files on the linker's command line in the order the source files were added to the project AND it puts the custom parameters for the linker (where I had startup.o) at the end of command line. So I just had to write a post step in the makefile that linked with startup.o first. So I'm actually linking twice now, overwriting the first elf. Maybe I can stop Dev-C++ from doing it's link but it's pretty harmless as it is right now.

Once I figure out all these little quirks of using Dev-C++ as an IDE for Dreamcast Development, I'd like to release a zip of my Dev-C++ so that people can setup a development environment on windows in just about one step.

BlackAura · Post by **BlackAura** » Fri Jan 09, 2004 9:59 am

Ah, it's a DevC++ thing. I've never managed to get that to work acceptably.

ragnarok2040 · Post by **ragnarok2040** » Fri Jan 09, 2004 4:21 pm

I managed to get it to work, but there seems to be different issues for different people. I bet it might be a ntfs/fat32/win98 or win2k/xp type of compatability issue. I got it to work by setting up the Dreamcast compiler like it says, except using mingw32-make.exe instead of regular make.exe in dev-cpp's bin folder. I also had to remove the rm lines from the dreamcast.mak files, because the rm lines were giving an error about nothing to remove, even though it should've just warned.. or something. After I had done all that, it worked quite well, actually.

JMD · Post by **JMD** » Sun Feb 15, 2004 4:28 pm

Hi,

My project compiled with Dev C++ run fine with code cable but refuse to boot with Demo Menu.

scherzo wrote:I just had to write a post step in the makefile that linked with startup.o first.

How did you that ?

Thanks.

Storminator16 · Post by **Storminator16** » Sun Feb 15, 2004 4:32 pm

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all-before:
	rm -f romdisk.img romdisk.o
	genromfs -f romdisk.img -d romdisk -v
	bin2o romdisk.img romdisk_boot romdisk.o

[b]all-after :[/b]
#	dc-tool -e -x $(BIN)
	sh-elf-gcc startup.o <blah blah blah, object files>-o $(BIN) -L"C:/Dev-Cpp/dclib" -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000 romdisk.o -lmp3 -loggvorbisplay -lparallax -lkmg -lpng -ljpeg -lkglx -lkallisti -lz -lm -lgcc -lk++
	sh-elf-strip $(BIN)

JMD · Post by **JMD** » Mon Feb 16, 2004 3:15 pm

Thanks WillSams

I tried many times but I it's got a pbm with the Windows style folder :

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sh-elf-gcc.exe startup.o main.o Text.o utils.o myGraphLib.o Game.o Pause.o HScore.o Menu.o -o "shangai.elf" -L"C:/Program Files/Dev-Cpp/dclib" -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000 startup.o romdisk.o -loggvorbisplay -lpng -lz -lm -lkallisti -lgcc

error :

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make.exe: *** No rule to make target `/Program', needed by `main.o'.  Stop.

I think I don't have the same make.exe than you because the syntax

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all-before:
   rm -f romdisk.img romdisk.o
   genromfs -f romdisk.img -d romdisk -v
   bin2o romdisk.img romdisk_boot romdisk.o

don't run on my install

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dreamcast.mak:2: *** missing separator.  Stop.

I must use :

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romdisk.img:
	genromfs -f romdisk.img -d romdisk -v

romdisk.o: romdisk.img
	bin2o romdisk.img romdisk romdisk.o

all-before: romdisk.o

I made few weeks ago a doc (sorry it's in french) of how to install Dev-C++ with l@Cible

speud · Post by **speud** » Mon Feb 16, 2004 3:23 pm

did you try to replace the folder names by dos style names? is i remember correctly it takes the 6 first chars and put a ~1 at the end, for example Program Files becomes Progra~1

GPF · Post by **GPF** » Mon Feb 16, 2004 3:48 pm

or maybe use

/cygdrive/c/Program\ Files/Dev-Cpp/dclib

if under cygwin

the point is you have to escape the space with a backslash even though I thought the "quotes" around it should have worked anyway

Storminator16 · Post by **Storminator16** » Mon Feb 16, 2004 3:55 pm

He's using Dev-C++

GPF · Post by **GPF** » Mon Feb 16, 2004 4:17 pm

Didn't realize that it was under dev-cpp, I only used it as an editor then used the command line under mingw to compile

sh-elf-gcc.exe startup.o main.o Text.o utils.o myGraphLib.o Game.o Pause.o HScore.o Menu.o -o "shangai.elf" -L"C:/Program Files/Dev-Cpp/dclib" -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000 startup.o romdisk.o -loggvorbisplay -lpng -lz -lm -lkallisti -lgcc

shouldn't it be

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sh-elf-gcc.exe startup.o main.o Text.o utils.o myGraphLib.o Game.o Pause.o HScore.o Menu.o -o "shangai.elf"  -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000 startup.o romdisk.o -L"C:/Program Files/Dev-Cpp/dclib" -loggvorbisplay -lpng -lz -lm -lkallisti -lgcc

because the -L is the location of the lib directory not that will eliminate the space problem between Program and Files

maybe use

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c:\\Program\ Files\\Dev-Cpp\\dclib

or

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C:/Program\ Files/Dev-Cpp/dclib

speud · Post by **speud** » Mon Feb 16, 2004 4:27 pm

i dont know about dev-c++ but i had the same problem with other programs before, in the command line i tried to put the path between " like he did but it didnt work, so i removed them and wrote the path in dos style and it worked, it was under windows xp

JMD · Post by **JMD** » Mon Feb 16, 2004 4:27 pm

The ~ seems to works.
Now all compile right (without makefile errors) but there is only the normal Dev-C++ output.
... I will search a little than give you feedback.

Thanks.

JMD · Post by **JMD** » Tue Feb 17, 2004 1:42 pm

Ok,

I found solution to my makefile pbm. I googled and find this.
It was a stupid pbm beetween tab and spaces so I edit the file with notepad

.

Here is my new makefile :

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LIBS2 = $(patsubst startup.o, ,$(LIBS))
BIN2 = $(patsubst %.elf,%.el2,$(BIN))
RBIN = $(patsubst %.elf,%.bin,$(BIN))
FBIN = 1st_read.bin


romdisk.img : 
	genromfs -f romdisk.img -d romdisk -v

romdisk.o : romdisk.img
	bin2o romdisk.img romdisk romdisk.o

all-before : romdisk.o
	
$(BIN2) : $(BIN)
	$(CC) startup.o $(LINKOBJ) -o $(BIN2) $(LIBS2)

Strip : $(BIN2)
	sh-elf-strip $(BIN2)

$(RBIN) : Strip
	sh-elf-objcopy -O binary  $(BIN2) $(RBIN)

all-after : $(RBIN) 
	scramble $(RBIN) $(FBIN)

When I use a variable, I've no more pbm with long file names.

And the end of my compilation log :

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sh-elf-gcc.exe main.o Text.o utils.o myGraphLib.o Game.o Pause.o HScore.o Menu.o  -o "Maqiupai.elf" -L"C:/Program Files/Dev-Cpp/dclib" -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000 startup.o romdisk.o -loggvorbisplay -lpng -lz -lm -lkallisti -lgcc -nostdlib 

sh-elf-gcc.exe startup.o main.o Text.o utils.o myGraphLib.o Game.o Pause.o HScore.o Menu.o  -o Maqiupai.el2 -L"C:/Program Files/Dev-Cpp/dclib" -ml -m4-single-only -nostartfiles -nostdlib -Wl,-Ttext=0x8c010000   romdisk.o -loggvorbisplay -lpng -lz -lm -lkallisti -lgcc -nostdlib 

sh-elf-strip Maqiupai.el2

sh-elf-objcopy Maqiupai.el2 Maqiupai.bin

scramble Maqiupai.bin 1st_read.bin

Execution terminated

We can see the 2 compils, the strip, the objcopy and the scramble.

The second elf (el2 : the elf after the strip) work's fine with the coder cable and DC-Tool.

BUT (I begin to feel a bit bored now

),
When I use DemoMenu to run my file (I use the DCEvolution Xmas Disc's one), no file runs.
I tried the bin, the 1st...bin and the el2 (file after strip).

Where is the pbm ? In the DemoMenu version, In the compil order ?

Have you got any ideas ?

Thanks

JMD · Post by **JMD** » Sun Feb 22, 2004 4:24 am

That's works fine now.

I updated the example on my last post to be correct.