z/TPF Program Management - IBM

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Compiler overview for z/TPF C/C++ support
The z/TPF system requires three compilers to support C/C++ language programs:
an ELF-compatible compiler (GNU compiler collection (GCC) or Systems/C and
Systems/C++), the IBM z/OS C/C++ compiler, and a native Linux C/C++ compiler.
The executable and linking format (ELF)-compatible compiler is required to build the
online z/TPF system and user application programs. C/C++ language programs that
are written for the z/TPF system must be compiled and linked in an ELF format. To
do this, the z/TPF system uses an ELF-compatible compiler, also known as a
cross-compiler, that emits object code specifically for the z/TPF system. The
ELF-compatible compiler runs on Linux and produces object code that is a
specialization of ELF for the z/TPF system. The ELF-compatible compiler is
required because you cannot use the native compiler that comes with Linux to build
z/TPF applications that are written in C/C++ language.
The ELF-compatible compiler links to the GNU C library (glibc) and the GNU
standard C++ library (libstdc++). Each ELF-compatible compiler is associated with a
specific version of the libstdc++ library that it links to. For more information, see
Required z/TPF and z/TPFDF product software.
The IBM z/OS C/C++ compiler is required to build offline utilities, such as tpfldr
and db2pp, on z/OS. It is not used to build programs that are loaded to the online
system.
A native Linux C/C++ compiler is required to build offline utilities, such as tpfobjpp
and offldr, on Linux. It is not used to build programs that are loaded to the online
system.
For more information about the z/TPF ELF-compatible compilers, see “GCC
ELF-compatible compilers” and “Systems/C and Systems/C++ ELF-compatible
compilers” on page 34.
GCC ELF-compatible compilers
For the GNU compiler collection (GCC) executable and linking format
(ELF)-compatible compilers, the z/TPF system supports a staged approach to
upgrading your compiler.
In other words, you can have a combination of compiled product and application
code levels:
v Continue with all product and application code compiled with GCC V4.1.
v Compile all product code with GCC V4.6, with some applications compiled with
GCC V4.6 and some applications compiled with GCC V4.1.
v Compile all product and application code with GCC V4.6.
All of the combinations assume that you installed all of the compiler-related APARs
for the z/TPF system.
GCC V4.6 only
Using the GCC V4.6 compiler exclusively involves installing the compiler-related
APARs, getting and installing the GCC V4.6 compiler, and rebuilding your product
and application code with the GCC V4.6 compiler.
© Copyright IBM Corp. 2005, 2012 33