configure.ac:
===

AC_INIT([giants],[0.1],[robert.stolarz@yandex.com])
AC_CONFIG_SRCDIR([src/main.cpp])
AM_INIT_AUTOMAKE([foreign subdir-objects])
AM_MAINTAINER_MODE([enable])

AC_PROG_CXX
AC_PROG_CC

PKG_CHECK_MODULES([gllibs], [gl glew glfw3 >= 3.0])
PKG_CHECK_MODULES([soil2], [soil2])

AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

======

Makefile.am:
===
bin_PROGRAMS = giants
giants_SOURCES = src/main.cpp
AM_CXXFLAGS = @gllibs_CFLAGS@ -Wall -v
AM_LDFLAGS = @gllibs_LIBS@ -lm
======

soil2.pc
===
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib/linux
includedir=${prefix}/include

Name: soil2
Description: A tiny C lib primarily for uploading textures into OpenGL
Version: 44.1
Requires:
Conflicts:
Libs: -L${libdir} -lsoil2 
Libs.private:
Cflags: -I${includedir} 
======