build a hello world program under sigclear

It is simple to use sigclear-develop for algorithm and program development. We start with writing a hello-world program under sigclear. It includes the following two text files in a project folder, for example named as test/:

Mhelloworld.c

// hello world
/* test program to say hello world */
#include < stdio.h>
int main(int argc, const char **argv)
{
	printf("hello wolrd\n");
}

SConstruct

from program import *
SGBuild("sigclear-test")

local build

To build the project, just type the command scons local or simply scons on the folder. It will automatically build the binary program sghelloworld and a manual file sghelloworld.1 in the project folder. To run the program and view the manual,


./sghelloworld
hello world
man ./sghelloworld.1

build and install

To install the built programs, manuals, (and headers, libraries if possible) in the sigclear system folder (/opt/sigclear/, must have written access), scons install To install them into other folder, such as /opt/sigclear2/ scons install prefix=/opt/sigclear2/

build an installable package

To build an installable package, type the following command in the shell scons package It will generate a sigclear-test-1-0.el8.x86_64.rpm package on CentOS 8, or a sigclear-test-1-0.db9.x86_64.deb package on Debian 9.