Compiler method of finding header.

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/usr/include/openssl/kssl.h:72:18: krb5.h: No such file or directory

includes line:
#include <krb5.h>

So it's expecting the header to be wherever the compiler expects them.

using locate:
/usr/kerberos/include/krb5.h

How do I tell the compiler where to look for headers? OS is RedHat 9.

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Without knowing what you are trying to compile or being able to see the Makefile it would be hard to say how you could do that in the makefile as includes "include" header files that are located in /usr/include so your Makefile is not at fault here, or so it seems to me.

If this is a one file error then you could edit kssl.h and change the above mentioned include to;

#include </usr/kerberos/include/krb5.h>

I expect you would then find that your compile will go on a little and barf again as it will miss another file, you can also create a sym link in /usr/ include (possably a better idea).

cd /usr/include
ln -s /usr/kerberos/include kerberos
Or something to that effect.

The most likly explanation for the problem is that your kerberos includes have been installed one directory too high, header files belong in /usr/include and not in /usr, that is what i have been taught.

If the Linux community is a bunch of theives because they
try to imitate windows programs, then the Windows community
is built on organized crime.

Regards Richard
[email protected]
http://people.zeelandnet.nl/pa3gcu/



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Hi,
I am not quite sure I understand what you are trying to do here, but this might help.

If you put something like

#include <foobar.h>

in a source file, then the compiler looks for foobar.h in the default location(s) - usually /usr/include.
If you put something like

#include "/home/me/include/foobar.h"

in the source, the the compiler looks for that specific file. Note that the first example uses angle brackets <> and the second uses double quotes.
So you might try something like:

#include "/usr/kerberos/include/krb5.h"

You second option is to add /usr/kerberos/include/ to the list of places checked for include files. You can do this on the command line for gcc with to option:

gcc -I/usr/kerberos/include/ something.c

You are probably using a Makefile, so you would have to hack that to make it (the -I option) work.

I hope this helps.

regards,

John Kelly
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if you asking how to permanently change your include folder, I have to admit that I don't actually know. but if you just want it to search a particular directory at compile time you use the -I option

for instance if I want gcc to look in the /home/mydir/include folder I would type

gcc file.c -I /home/mydir/include

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Short answer:
Add "-I/usr/kerberos/include" to your GCC command.

Long answer:

This looks like a problem with kssl.h expecting a file to be located in the "standard search path" for gcc but it is not.

To see the standard search path for includes do this:
cpp -v

On my machine I get this:
[driver@mulan ~/junk]$ cpp -v
Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/specs
Configured with: ../configure --prefix=/usr --libdir=/usr/lib --with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --enable-long-long --enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java --host=i586-mandrake-linux-gnu --with-system-zlib Thread model: posix
gcc version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk)
/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/cpp0 -lang-c -v
-D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i586__ -D__tune_pentium__ -
GNU CPP version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk) (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include
/usr/include
End of search list.

The important part is at the bottom - I cut/paste the important part:
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include /usr/include
End of search list.

So the default search path for files that are "#include <...>" is:
/usr/local/include /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include /usr/include

If you want to ADD a directory to this when you run gcc pass "-I". You can do a test with cpp:
[driver@mulan ~/junk]$ cpp -v -I/usr/X11R6/include
Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/specs
Configured with: ../configure --prefix=/usr --libdir=/usr/lib --with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --enable-long-long --enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java --host=i586-mandrake-linux-gnu --with-system-zlib Thread model: posix
gcc version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk)
/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/cpp0 -lang-c -v
-I/usr/X11R6/include/ -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i586__ -D__tune_pentium__ - GNU CPP version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk) (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/X11R6/include
/usr/local/include
/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include
/usr/include
End of search list.

Notice the search list now includes /usr/X11R6/include as I added it with the -I.

Remember if you pass a direcory that doesn't exist, or you cannot access it will be listed before the directories with an error. A standard mandrake install has one already compiled in... It's this:
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"

Note: cpp is the C pre-proccessor that gcc will call. -I works the same in both.

Bryan Whitehead
SysAdmin - JPL - Interferometry and Large Optical Systems
Phone: 818 354 2903
[email protected]

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