Keil Software — Cx51 Compiler User’s Guide |
17 |
|
|
Chapter 2. Compiling with the Cx51 Compiler
This chapter explains how to compile C source files and discusses the compiler control directives. These directives allow you to:
|
Direct the Cx51 compiler to generate a listing file |
2 |
||
|
Control the amount of information included in the object file |
|||
|
Specify optimization level and memory models |
|
||
|
|
|
|
|
|
NOTE |
|
|
|
|
Typically you will use the Cx51 compiler within the µVision2 IDE. For more |
|
||
|
information on using the µVision2 IDE, refer to the User’s Guide “Getting |
|
||
|
Started with µVision2 and C51”. |
|
||
|
Environment Variables |
|
||
|
If you run the Cx51 compiler within the µVision2 IDE, you need no additional |
|
||
|
settings on your computer. If you want to run the Cx51 compiler and utilities |
|
||
|
from the command prompt, you must manually create the following environment |
|
||
|
variables. |
|
|
|
|
|
|
|
|
|
Variable |
Path |
Environment Variable specifies … |
|
|
PATH |
\C51\BIN |
path of the C51 and CX51 executable programs. |
|
|
TMP |
|
path to use for temporary files generated by the compiler. If the |
|
|
|
|
specified path does not exist, the compiler generates an error and |
|
|
|
|
aborts compilation. |
|
|
C51INC |
\C51\INC |
path to the folder for Cx51 include files. |
|
|
C51LIB |
\C51\LIB |
path to the folder for Cx51 library files. |
|
For Windows NT, Windows 2000 and Windows XP these environment variables are entered under Control Panel – System – Advanced – Environment Variables.
For Windows 95, Windows 98 and Windows ME the settings are placed in AUTOEXEC.BAT using the following commands:
PATH=C:\KEIL\C51\BIN;%PATH%
SET TMP=D:\