[sdcc-devel] [ sdcc-Feature Requests-872250 ] order of library search

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Feature Requests item #872250, was opened at 2004-01-07 13:59
Message generated for change (Comment added) made by ganeshaadityan
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Category: None
Group: None
Status: Open
Priority: 5
Submitted By: ganesh meenu (ganeshaadityan)
Assigned to: Nobody/Anonymous (nobody)
Summary: order of library search

Initial Comment:
A change in the order in which the folders are searched 
for *.lib files is required. First the folders specified in 
the command line via -L option should be searched 
before attempting to search the sdcclib. This change 
will enable the end users to modify/rewrite the 
functions which are there in the standard library.

Thanks in advance
ganesh

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>Comment By: ganesh meenu (ganeshaadityan)
Date: 2004-01-09 16:10

Message:
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I rewrote the strcpy function to add 0x200 to the bytes as 
they are copied. I named the function as strcpy and the file 
containing this function as strcpy.c. I placed this file in a 
folder called lib in my working folder. I compiled this file with 
sdcc -c strcpy.c and it compiled OK creating the strcpy.rel 
file. I added an entry strcpy in my already existing utils.lib 
file. Now I created TEST_LIB.c file which has the main() 
function. In this, I created a string ucase[]
= "ABCDEFGHIJKLMNOP". I copied this to another string lcase
[17] using strcpy(lcase, ucase); I displayed both the strings 
in the 2x16 LCD connected to my kit. I expect to see 
ABCDEFGHIJKLMNOP & abcdefghijklmnop, but I see 
uppercase in both the lines. (I get expected result if I 
rename my function to zstrcpy and call zstrcpy in the main. )

The following are the extracts from the .map and .lnk files:
Extract from TEST_LIB.map
-----------------8><---------------------------------------------
-------

Libraries Linked		       [   object  file   ]

lib/LCD.lib                         [          lcd_pos ]
D:\SDCC_235_20030610\bin\..\lib\small/libsdcc.lib    
[          _strcpy ]
lib/LCD.lib                         [       lcd_string ]
D:\SDCC_235_20030610\bin\..\lib\small/libsdcc.lib    [         
_startup ]
D:\SDCC_235_20030610\bin\..\lib\small/libsdcc.lib    [         
_gptrput ]
D:\SDCC_235_20030610\bin\..\lib\small/libsdcc.lib    
[              _bp ]
D:\SDCC_235_20030610\bin\..\lib\small/libsdcc.lib    [         
_gptrget ]
lib/utils.lib                       [         delay1ms ]
-----------------8><---------------------------------------------
-------
Extract from TEST_LIB.lnk
-----------------8><---------------------------------------------
-------
-k lib
-k D:\SDCC_235_20030610\bin\..\lib\small
-l libsdcc
-l libint
-l liblong
-l libfloat
-l utils.lib
-l LCD.lib
-l i2c.lib
-l Serial.lib
-l SerialStack.lib
-l MDBStack.lib
TEST_LIB.rel

-e
-----------------8><---------------------------------------------
-------

I feel even though the folders are searched in the required 
order (myfolder followed by sdccfolder) the lib files are taken 
the otherway around (sdcclib followed by mylib). As I had 
mentioned earlier, having mylib searched first will help the 
user to rewrite the some lib functions to suit his requirement.

Regards Ganesh



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Comment By: Borut Razem (borutr)
Date: 2004-01-07 17:52

Message:
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Did you try with a newer SDCC version?
Can you attach an short example, comman line and the
produced .lkr file?
I took a look to the code, and it seems OK: -k entries for
-L paths are (or at least should be :-) before system library
path entries.

If the .lkr file is OK, then this is probably a linker problem...

Borut


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Comment By: ganesh meenu (ganeshaadityan)
Date: 2004-01-07 17:31

Message:
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I use sdcc 2.3.5 (June 10 2003) (MINGW32) on Win2K box. 
My target device is mcs51. Sorry about not giving this info in 
first place

Regards Ganesh


----------------------------------------------------------------------

Comment By: Borut Razem (borutr)
Date: 2004-01-07 16:35

Message:
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Please be more specific about the target and SDDC version,
vhere you found the problem.

----------------------------------------------------------------------

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