National Instruments 320685D-01 UNIX Compiler/Linker Issues

© National Instruments Corporation 5-1 LabWindows/CVI Programmer Reference Manual
5
UNIX Compiler/Linker Issues
This chapter describes the kinds of compiled modules available under LabWindows/CVI for
UNIX and includes programming guidelines for modules you generate with external
compilers.
Calling Sun C Library Functions
You can call functions in the Sun Solaris C libraries from source code in LabWindows/CVI.
LabWindows/CVI automatically links your program to the following static libraries, located
in the /usr/lib directory, when you build the project.
Solaris 1: libm.a, libc.a
Solaris 2: libsocket.a, libnsl.a, libintl.a, libm.a, libc.a
When you create a standalone executable, LabWindows/CVI invokes the Sun Solaris link
editor (ld) to link your program to the LabWindows/CVI dynamic library and to the system
libraries. By default, the Sun Solaris link editor uses the dynamic versions of the libraries.
LabWindows/CVI passes the following linking options to the Sun Solaris link editor:
Solaris 1: -lm -ldl -lc
Solaris 2: -lsocket -lnsl -lintl -lm -lthread -lc
In general, you can use the header files that Sun provides for these libraries in the
/usr/include directory. For the ANSI C functions, however, use the header files that come
with LabWindows/CVI.
Restrictions on Calling Sun C Library Functions
You cannot call any Sun C Library function that uses data types incompatible with the
LabWindows/CVI compiler or libraries. In particular, you must not call functions that use the
long double data type. In LabWindows/CVI the long double data type has 8 bytes, but the
Sun libraries expect a 16-byte object.
Under Solaris 2, you must not call any function that uses the long long data type.
LabWindows/CVI does not recognize this non-ANSI type.
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