On 08/09/2011 04:10 AM, florent ainardi wrote:
i have a little problem when i try to compil my program
nss and nspr are installed on my system
when i launch gcc with the following syntax
gcc -g test.c -otest -I/usr/include/nss -I/usr/include/nspr
i have the following error
................
undefined reference to 'PR_Init'
undefined reference to 'NSS_NoDB_Init'
undefined reference to 'PR_Get_Error'
do you have an idea ?
Yes, but the real question is why don't you? Your questions on this list
suggest you're struggling with basic computer science. With all due
respect you need to take some courses in fundamentals. This list is
dedicated to advanced topics in computer security, it is not the place
to learn how to compile and link, one of the very first topics in a
computer science education.
The answer to your question is that you need to supply the nss and nspr
libraries which contain those symbols to the linker. This is done with
the -l command line arg passed to gcc when you're building a final
executable image. The "undefined reference" error means the linker (do
you know what that is?) is unable to resolve (i.e. locate the compiled
code) for those functions because they are not in your test.c program,
rather they are in the nss and nspr libraries, hence your test.c program
makes a reference to a symbol which is undefined. So where is it
defined? In the nss and nspr libraries!
Pay particular attention to the -I and -l command line args and be sure
to understand the distinction between them. In previous emails you
incorrectly conflated include files and libraries. They play very
distinct and separate roles during the build process.
In the future I'm sure the folks on this list would be happy to help you
with actual issues with NSS, PKI and cryptography, but not with computer
science 101 :-) As a courtesy to others on this list such things are
said to be "off topic".
HTH,
John
--
dev-tech-crypto mailing list
dev-tech-crypto@lists.mozilla.org
https://lists.mozilla.org/listinfo/dev-tech-crypto
