rlcarr@athena.mit.edu (Rich Carreiro) (03/22/89)
I've finally gotten the definitive word on how to use Pre-Compiled header files in Lattice C 5.02. This is straight from the Amiga message base on the LBBS. Message #417 To ALL 01-20-89 From CARLOTTA DECONCILIS (SYSOP) Subject PRECOMPILED HEADERS --------------------------------------------------------------------------- HOW TO USE PRECOMPILED HEADER FILES: Precompiled header files can be generated with the 5.0 version of Lattice C for the Amiga. Precompiled header files allow for faster compilation than compressed or ASCII headers on subsequent compilations, however they are larger. To generate a precompiled header file do the following: 1) Create a trivial C program that pulls in the header files that you wish to precompile. For example to precompile stdio.h write a program called foo.c with the single line: #include "stdio.h" 2) Next, invoke lc with the following line: lc -ph -ostdio.sym foo.c Any file name will work. The ".sym" extension is not special but some consistent naming convention will help you recognize precompiled header files when you encounter them. 3) To use the precompiled version of the header, use the -H option on the lc command line. There is no limit to the number of times -H may be specified on the command line. For example: lc -Hstdio.sym -Hstdlib.sym bar.c If you plan to include debug information in the object module, for data types specified in the header file, you must include the -d option before the -H option. If you put the -d option after the -H option, no structure members or data types defined in the header will be available to the debugger. Note that any data declared in a precompiled header file is assumed to be extern. Therefore, the object must be declared in one of the c modules to be linked into the executable file. ** Use the "-h" (lower case) option instead of "-H" in v5.0. V5.02 of Lattice C will support the upper case "-H" option. Both, accomplish the same thing. ================================ Enjoy! ARPA: rlcarr@athena.mit.edu UUCP: ...!mit-eddie!mit-athena!rlcarr BITNET: rlcarr%athena.mit.edu@MITVMA.mit.edu ******************************************************************************* * Rich Carreiro "Back off man, I'm a scientist." * * rlcarr@athena.mit.edu - Dr. Peter Venkman * *******************************************************************************