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4 C Compiler
This chapter explains how to use the xgcc C compiler, and provides details on interfacing with the assembly source.
For information about the standard functions of the C compiler and the syntax of the C source programs, refer to the ANSI C
literature generally available on the market.
4.1 Functions
The xgcc C compiler compiles C source files to generate an assembly source file that includes S1C17 Core instruction set
mnemonics, extended instructions, and assembler directives. The xgcc is a gnu C compiler in conformity with an ANSI standard.
Since special syntax is not supported, the programs developed for other types of microcomputers can be transplanted easily to the
S1C17 Family.
Furthermore, since this C compiler has a powerful optimizing capability that allows it to generate a very compact code, it is best
suited to developing embedded applications.
This C compiler consists of three files: xgcc.exe, cpp.exe and cc1.exe.
The xgcc is based on the C compiler of Free Software Foundation, Inc. A GCC version 4 C compiler is provided in the gcc4 folder of
this package, and a GCC version 3 C compiler that is the same as GNU17 v2.3.0 is provided in the gcc3 folder. Details about the
license of this compiler are written in the text files "COPYING3" and "COPYING", therefore, be sure to read this file before using the
compiler.
4.2 Input/Output File
4.2.1
Input File
C source file
File format:
Text file
File name:
<filename>.c
Description:
File in which the C source program is described.
4.2.2
Output Files
Assembly source file
File format:
Text file
File name:
<filename>.s
Description:
An assembly source file to be input to the as assembler. This file is generated when the -S option is specified.
S5U1C17001C Manual
(Rev. 1.0)
C source file
File.c
C compiler
ｘgcc -S
Assembbly
File.s
source file
as assembler
Figure 4.2.1 Flowchart
Seiko Epson Corporation
C source file
File.c
C compiler
ｘgcc -c
Object
File.o
source file
ld linker
4 C Compiler
4-1
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