mplib1 has been ported to the following platforms/formats.
- linux, i386, ELF, GCC
- NCR3000, SVR4, i386, ELF
- Sequent ptx V4.2.x, i386, COFF
- Sequent ptx V4.2.x/V4.4.x, i386, ELF
- SINIX V5.42
- Solaris V2.5
- HP UX B.10.20
To build mplib1 on any platform you will require GNU make or some equivalent
make program that can cope with VPATH directives, inclusion of dynamically
generated include files (for dependancies) and appending text to a variable
( CFLAGS+=-DSPECIAL_DEFINE ).
If you already have a suitable make, to build for an existing platform execute the following in the main directory
where XXXX is one of the following
This will create a link from make_platform to the relevant platform
makefile, and also create a new mplib1/mplib1_config.h file.
It will also create a file called make_site which should now be
customised for the particular environment. Currently the only likely
contents are definitions of where to find GNU GDBM files.
It should then be possible to build mplib1 simply by typing
Porting to a new platform
Porting mplib1 to a new platform is easiest if it bears some
resemblance to an existing port. That notwithstanding, just follow the
straight-forward instructions below.
- Choose a suitable platform type name, below we use 'wibbleos'.
- In the platform directory we will create two files. One called
wibbleos.g the other wibbleos.m.
- The wibbleos.g contains the platform required #define
statements. These are detailed below.
- The wibbleos.m contains the platform specific Makefile
statements. Some of the varients required are discussed
The following are a list of the current symbols that may be required.
- to be defined when compiler does not handle long long
- Used when the compiler handles long long constructs
and accepts %Lx for printing same. Otherwise %llx
- Used when the machine architecture requires 8 byte elements
(double and long long) to align on 8 byte boundaries.
- to be defined when <sys/select.h> needs to be
included (for definition of fd_set).
- to be defined when <getopt.h> needs to be included
for the definition of getopt(2)
- to be defined when gettimeofday is defined as taking two
int gettimeofday(struct timeval *tv, struct timezone *tz);
- to be defined when gettimeofday is defined as taking
two parameters, but the second one should always be NULL.
- to be defined when it is valid to add an off_t to a
void * to get another pointer (equivalent to typecasting
to char, adding the offset, and typecasting back).
There is a set of symbols of which one and only one should be used,
which defines which inter-process locking mechanism to use.
For details of current implementations click
The platform dependant makefile will have any specific requirements
for the following make variables.
- DEPFLAGS - make depend flags
- include paths, special flags
- CFLAGS - producing object files from C files
- include paths, special flags
- ARFLAGS - archiving flags
- object format, verbosity etc.
- LDFLAGS - linking flags
- object formats, symbol manipulation, etc.
- LDLIBS - linking libraries
- libraries, library paths.
In addition it would contain any special build rules for platform
Note: if modifications to the source files are required, then
the changes should be selectable using a suitable #ifdef
and the #define placed in the platform define file.