How to create a configure script what get used by compiling a c program 30.10.19

1.
install the autoconf tools:

# OSX
$ brew install autoconf automake libtool
# Ubuntu/Debian
$ sudo apt-get install autoconf automake libtool
# RHEL/CentOS
$ sudo yum install autoconf automake libtool

2.
create a sample c source code like hello.c:

#include "stdio.h"     
int main( int argc, char *argv[] )
{
  char s[] = "Hello";
  printf("you said %s",s);
  return 0
}

3.
create the file configure.ac:

# Must init the autoconf setup
# The first parameter is project name
# second is version number
# third is bug report address
AC_INIT([hello], [1.0])

# Safety checks in case user overwritten --srcdir
AC_CONFIG_SRCDIR([hello.c])

# Store the auxiliary build tools (e.g., install-sh, config.sub, config.guess)
# in this dir (build-aux)
AC_CONFIG_AUX_DIR([build-aux])

# Init automake, and specify this program use relaxed structures.
# i.e. this program doesn't follow the gnu coding standards, and doesn't have
# ChangeLog, COPYING, AUTHORS, INSTALL, README etc. files.
AM_INIT_AUTOMAKE([-Wall -Werror foreign])

# Check for C compiler
AC_PROG_CC
# We can add more checks in this section

# Tells automake to create a Makefile
# See https://www.gnu.org/software/automake/manual/html_node/Requirements.html
AC_CONFIG_FILES([Makefile])

# Generate the output
AC_OUTPUT

4.
create the file Makefile.am:

bin_PROGRAMS = hello
hello_SOURCES = hello.c

5.
create the configure script:

autoreconf --verbose --install --force

6.
create the make file:

./configure

7.
create the executable file with:

make

https://www.idryman.org/blog/2016/03/10/autoconf-tutorial-1/

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How to create a configure script what get used by compiling a c program 30.10.19

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