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Old 08-01-2017, 10:10 AM   #1
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Compiler xlc can't find headers


I am having problems with my C compiler xlc. It can't find the header files when I try to compile a program. For example, if I:

cc md5.c

It throws me an error that says: include file <sqludf.h> not found. But if I search the sqludf.h header I find it in a path. I already changed the angle brackets to quotes in the md5.c file:

#include file "sqludf.h"

to search for headers in the current directory over system headers, but it still shows the same error "include file "sqludf.h" not found". I also tried to bind the path where the sqludf.h is to the LD_LIBRARY_PATH, but it doesn't work either:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/header/sqludf.h

what can i do to solve this? Thanks in advance

Last edited by m@o_614; 08-01-2017 at 10:13 AM.
Old 08-02-2017, 03:03 AM   #2
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That is failing to find a header file, not a linked library.

I am not familiar with xlc, but with most C/C++ compilers you would need to pass the search directory with -I, like

cc -I/path/to/header source.c
Or you could simply use the full path in the include directive.
Old 08-02-2017, 09:56 AM   #3
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Moved: This thread is more suitable in <Programming> and has been moved accordingly to help your thread/question get the exposure it deserves.
Old 08-02-2017, 02:29 PM   #4
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Thanks for your responses. I put the full path in the include directives and the error messages "sqludf.h not found". are no longer appearing but now it is giving me another error when i try to compile the md5.c file:

ld: 0711-317 ERROR: Undefined symbol: .main
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

this is the code in md5.c, as you can see there is no main in this file and neither in the md5.h:

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include </home/inst6/sqllib/include/sqludf.h>
#include </home/inst6/sqllib/include/sqlca.h>
#include </home/inst6/sqllib/include/sqlda.h>
#include "md5.h"

/* MD5 Hashing */

#ifdef __cplusplus
extern "C"
void SQL_API_FN md5_c(
SQLUDF_CHAR out[33],

char *t;

t = md5( in );
strcpy( out, t );
free( t );

*outnull = 0;
Old 08-02-2017, 02:41 PM   #5
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This isn't a main program, so you cannot create an executable from it.
Anyways, please read this topic: What information to include in a post and how to use [code] tags?

Edit: you seem to wish to create a DB2-database plugin, that calculates MD5.
Try this:

xlc -Iincludepath -o md5.o md5.c
xlc -G -o md5.o

Last edited by NevemTeve; 08-02-2017 at 02:50 PM.


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