AC_PREREQ([2.71])

AC_INIT([libpwm],[0.0.0],[linux-pwm@vger.kernel.org])
AC_CONFIG_SRCDIR([sysfs.c])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_USE_SYSTEM_EXTENSIONS

# support LFS
AC_SYS_LARGEFILE

AM_MAINTAINER_MODE
AM_INIT_AUTOMAKE([foreign])

LT_CURRENT=0
LT_REVISION=0
LT_AGE=0
AC_SUBST(LT_CURRENT)
AC_SUBST(LT_REVISION)
AC_SUBST(LT_AGE)

#
# Checks for programs.
#
AC_PROG_CC

LT_INIT

AC_ARG_ENABLE([pwmcdev],
	      [AS_HELP_STRING([--enable-pwmcdev], [Build code to use /dev/pwmchipX @<:@default=check@:>@])],
	      [],
	      [: m4_divert_text([DEFAULTS], [enable_pwmcdev=check])])

available_pwmcdev=yes

AC_CHECK_HEADER([linux/pwm.h], [
AC_CHECK_DECL([PWM_IOCTL_GET_NUM_PWMS],, [available_pwmcdev=no], [#include <linux/pwm.h>])
		], [available_pwmcdev=no])

AC_MSG_CHECKING([Current state])
AC_MSG_RESULT([$available_pwmcdev $enable_pwmcdev])
AS_IF([test "x$enable_pwmcdev" = "xcheck"], [enable_pwmcdev=$available_pwmcdev])
AC_MSG_CHECKING([Current state])
AC_MSG_RESULT([$available_pwmcdev $enable_pwmcdev])

AC_MSG_CHECKING([if character device support is to be enabled])

AS_IF(test "x$enable_pwmcdev" = "xyes", [
	AC_DEFINE([HAVE_PWMCDEV], [1], [Define to 1 if the character device backend should be built])
	AC_MSG_RESULT([yes])
], [AC_MSG_RESULT([no])])

AM_CONDITIONAL([HAVE_PWMCDEV], [test x$enable_pwmcdev = xyes])

AC_CONFIG_FILES([
	Makefile
	libpwm.pc
])
AC_OUTPUT