Section 6.13. System Libraries

6.13. System Libraries

When you are building the source application on Linux, link errors may result because of missing libraries. System libraries may be named differently on Linux or simply don't exist because the APIs are already in the standard libc library. Table 6-21 compares HP-UX system libraries to Linux system libraries in terms of their functionalities.

Table 6-21. Linux and HP-UX System Library Comparison Table

Description	HP-UX	Linux
Curses	libxcurses	libncurses
Database APIs	libc, libdbm	libdb*
Security APIs	libsec (pwd.h)	libc (shadow.h)[47]
Socket APIs	libxnet (UNIX95/98) t_accept(), t_alloc(), t_bind(), t_close() . . .	libc (BSD4.3)
	libc (BSD4.3) endservent(), gethostbyaddr(), gethostname(), getnetbyaddr() . . .
RPC APIs	libnsl	libc
Math	libm (math.h) copysign, copysignf ldexp, modf, scalbn . . .	libm
XDR APIs	librpcsvc	libc
Real-time priority	rtprio	libc
Scientific Library	Various (HP MLIB)	libgsl (GNU Scientific Library)

^[47] PAM for Linux may be another option. See www.linuxdocs.org/HOWTOs/User-Authentication-HOWTO/index.html and www.kernel.org/pub/linux/libs/pam/.

GNU libc includes a variety of support libraries. See Chapter 3 for a complete listing of the libraries included in the GNU libc.