man lsbc++ (1): compiler driver for building LSB conforming applications

Other Alias

lsbcc, lsbcpp

SYNOPSIS

lsbcc [lsbcc-options] [compiler-options]
lsbc++ [lsbcc-options] [compiler-options]
lsbcpp [lsbcc-options] [compiler-options]

DESCRIPTION

This tool should be used in place of the cc, c++ or cpp command when building an LSB-conforming program.

LSB-conforming programs must link dynamically only with LSB-required and application-supplied shared libraries, as no other libraries can be guaranteed to be present on an LSB-compliant system. They must only use specified interfaces from LSB-required shared libraries. LSB programs also need to be linked with a special program interpreter which identifies them as LSB conforming.

The LSB development environment provides a set of replacement system headers and stub dynamic libraries. These headers and libraries have been carefully built so that they contain only the interfaces specified in the LSB. When the stub libraries are used for link-time symbol resolution, the use of unspecified interfaces in those libraries will result in link failures.

lsbcc is designed to apply the LSB build conventions with a minimum of changes to existing build setups. When invoked as the compiler, it first modifies the command line to follow the LSB build conventions, then passes the resulting command line on to the regular compiler, so lsbcc is effectively a wrapper program.

lsbcc takes a number of options prefixed with --lsb-, or alternatively; behavior other than the default can be controlled by a set of environment variables. Typically command line options will override options set through envionment varibles.

LSBCC OPTIONS

--lsb-help: Display help message. The compiler --help option will also display the output from --lsb-help.
--lsb-version: Display the version of LSB this tool can build for.
--lsb-verbose: The complete command line passed to either the C or C++ compiler will be printed to stderr just prior to execution. This helps see the effects of lsbcc and options.
--lsb-cc=<path to c compiler>: Specifies the name of the C compiler to invoke with the modifed argument set. If this environment variable is not found, the default cc will be used. This setting overrides the LSBCC environment setting.
--lsb-cxx=<path to c++ compiler>: Specifies the name of the C++ compiler to invoke with the modifed argument set. If this environment variable is not found, the default c++ will be used. This setting overrides the LSBCXX environment setting.
--lsb-cpp=<path to c preprocessor>: Specifies the name of the C preprocessor to invoke with the modified argument set. If this setting is not found, the default cpp will be used. This setting overrides the LSB_CPP environment setting.
--lsb-forcefeatures: This causes lsbcc to insert macro defines for all of the interface features it supports (e.g. -DHAVE_BSD, -DHAVE_GNU...). These macros are not needed for the LSB headers but may select necessary behavior in non-LSB headers that have conditionals. However, predefining the macros may collide with application defintions of the macros, so this is no longer the default behavior for lsbcc.
--lsb-libpath=<lsb_lib_path>: Specifies the location of the LSB stub libraries that will be linked against. If this option or the LSBCC_LIBS environment variable is not set, the default /opt/lsb/lib will be used. This option overrides the LSBCC_LIBS envionment setting.
--lsb-includepath=<include_path>: Specifies the location of the LSB header files that will be linked against. If this option or the LSBCC_INCLUDES environment variable is not set, the default /opt/lsb/include will be used. This option overrides the LSBCC_INCLUDES envionment setting.
--lsb-cxx-includepath=<include_path>: Specifies the location of the LSB header files that will be linked against. If this option or the LSBCXX_INCLUDES environment variable is not set, the default /opt/lsb/include will be used. This option overrides the LSBCXX_INCLUDES envionment setting.
--lsb-shared-libs=<shared_lib:...>: This option adds libraries to the list of non-lsb libraries to link as shared libraries (such as product internal shared libraries). A library name or colon-separated list of library names to add to the default list. The name should be the base part of the library only, for example to add libfoo.so use the name foo.
--lsb-shared-libpath=<path:...>: This option adds paths to be searched for shared libraries. Libraries found in the given set of paths will be added to the list of non-lsb libraries to link as shared libraries.
--lsb-modules=<module,..>: Enable support for the optional LSB modules listed. Currently the only supported optional module is 'Multimedia' which provides the ALSA libraries. Modules will added in addition to any added from the LSB_MODULES environment setting.

ENVIRONMENT

The following environment variables affect the behavior of lsbcc

LSBCC: Specifies the name of the C compiler to invoke with the modifed argument set. If this environment variable is not found, the default cc will be used.
LSBCXX: Specifies the name of the C++ compiler to invoke with the modifed argument set. If this environment variable is not found, the default c++ will be used.
LSB_CPP: Specifies the name of the C preprocessor to invoke with the modified argument set. If this environment variable is not found, the default cpp will be used.

LSBCC_LIBS: Specifies the location of the LSB stub libraries that will be linked against. If this environment variable is not found, the default /opt/lsb/lib will be used (or /opt/lsb/lib64 on certain 64-bit architectures).

LSBCC_INCLUDES: Specifies the location of the LSB header files that will be linked against. If this environment variable is not found, the default /opt/lsb/include will be used.

LSBCXX_INCLUDES: Specifies the location of the LSB C++ header files that will be linked against. If this environment variable is not found, the default /opt/lsb/include/c++ will be used.

LSBCC_SHAREDLIBS

A library name or colon-separated list of library names to add to the default list. The name should be the base part of the library only, for example to add libfoo.so use the name foo.

LSB_SHAREDLIBPATH

This option adds paths to be searched for shared libraries. Libraries found in the given set of paths will be added to the list of non-lsb libraries to link as shared libraries.

LSB_MODULES

Specify which optional LSB modules to include interfaces for. Currently 'Toolkit_Qt' is the only supported optional module.

LSBCC_FORCEFEATURES

This causes lsbcc to insert macro defines for all of the interface features it supports (e.g. -DHAVE_BSD, -DHAVE_GNU...). This can be helpful in some situations and was formerly the default behavior for lsbcc, but also can collide with feature macro definitions from other sources, so is no longer the default behavior for lsbcc.

LSBCC_DEBUG

A numeric value which represents a bit pattern specifying what kinds of debugging output to produce. The bits in this pattern are

0x0001   Display enviromental overrides
0x0002   Display the arguments passed in
0x0004   Display the arguments that are specifically recognized
0x0008   Display the arguments that are not recognized
0x0010   Display changes made to the include arguments
0x0020   Display changes made to the library arguments
0x0040   Display the modified argument list

LSBCC_WARN

A numeric value which represents a bit pattern specifying what kinds of warnings to emit. The bits in this pattern are

0x0001   Warn about libraries being changed to static linking

The 01 value is now on by default, to disable it specify an LSBCC_WARN where the low bit is set to zero.

LSBCC_VERBOSE

The complete command line passed to either the C or C++ compiler will be printed to stderr just prior to execution. This helps see the effects of lsbcc and options.

Non LSB Shared Libraries

Normally, only LSB-defined libraries should be linked as shared libraries, all others must be linked statically. However, if an application provides its own shared libraries which have been carefully checked for LSB conformance, the following methods can be used to selectively overrride lsbcc's rule of forcing static linking. The application may not depend on such a library being present on a system, so it must either be shipped with the application, or with another LSB conforming application on which this application depends.

Libs added with any of these options will be cumlative. Shared libs added with command line options must appear on the command line before any -l options to have effect.

--lsb-shared-libs=<shared_lib:...>: This option adds libraries to the list of non-lsb libraries to link as shared libraries (such as product internal shared libraries). A library name or colon-separated list of library names to add to the default list. The name should be the base part of the library only, for example to add libfoo.so use the name foo.
--lsb-shared-libpath=<path:...>: This option adds paths to be searched for shared libraries. Libraries found in the given set of paths will be added to the list of non-lsb libraries to link as shared libraries.
LSBCC_SHAREDLIBS: A library name or colon-separated list of library names to add to the default list. The name should be the base part of the library only, for example to add libfoo.so use the name foo.

LSB_SHAREDLIBPATH: This option adds paths to be searched for shared libraries. Libraries found in the given set of paths will be added to the list of non-lsb libraries to link as shared libraries.

EXAMPLES

lsbcc hello.c -o hello

CC=lsbcc CXX=lsbc++ ./configure; make

LSBCC_SHAREDLIBS=tcl:tk CC=lsbcc make

AUTHORS

Stuart Anderson <[email protected]> and other LSB contributors.

REPORTING BUGS

Report bugs at http://bugs.linuxbase.org.

BUGS

It is possible to confuse lsbcc's (and lsbc++) automatic library processing. In particular, build systems that include "clever" tools to manage which libraries to use, such as GNU libtool and pkgconfig, may defeat the checks for non-LSB libraries by silently supplying full pathnames instead of the -llib form.

FILES

/opt/lsb/include: the LSB header files
/opt/lsb/lib: the LSB stub libraries
/lib/ld-lsb.so.3: The LSB program interpreter (dynamic linker) for the IA32 architecture
/lib/ld-lsb-ia64.so.3: The LSB program interpreter for the Itanium architecture
/lib/ld-lsb-ppc32.so.3: The LSB program interpreter for the PowerPC 32-bit architecture
/lib64/ld-lsb-ppc64.so.3: The LSB program interpreter for the PowerPC 64-bit architecture
/lib/ld-lsb-s390.so.3: The LSB program interpreter for the S390 architecture
/lib64/ld-lsb-s390x.so.3: The LSB program interpreter for the S390X architecture
/lib64/ld-lsb-x86-64.so.3: The LSB program interpreter for the x86_64 architecture

NOTES

lsbcc is commonly delivered as a package named lsb-build-cc. If this package is used, the support package lsb-build-base must also be installed.

lsb-build-c++ supplies necessary header files for C++ compilation; it is a separate package as the c++ headers come from a different source than the base headers.

For commercial applications, developers need to be aware of the licenses of the libraries they link to. Since some licenses allow dynamic but not static linking to the library, and lsbcc may silently change (apparent) dynamic links to static, the LSBCC_WARN envirnonment variable should be used to notify of such changes.