# Process this file with autoconf to produce a configure script.
AC_INIT([libptp2],[1.1.10],[emsi@ipartners.pl])
AM_INIT_AUTOMAKE(libptp2, 1.1.10)
AC_PREREQ(2.53)
AM_CONFIG_HEADER([config.h])
AC_PROG_LIBTOOL

# library versioning
# (quoted from libtool doc)
# 1. Update the version information only immediately before a public release
# 2. If the library source code has changed at all since the last update,
#    then increment revision (`c:r:a' becomes `c:r+1:a').
# 3. If any interfaces have been added, removed, or changed since the last
#    update, increment current, and set revision to 0.
# 4. If any interfaces have been added since the last public release,
#    then increment age.
# 5. If any interfaces have been removed since the last public release,
#    then set age to 0. 

LIBPTP2_VERSION_CURRENT=2
LIBPTP2_VERSION_REVISION=4
LIBPTP2_VERSION_AGE=1
LIBPTP2_VERSION_INFO=$LIBPTP2_VERSION_CURRENT:$LIBPTP2_VERSION_REVISION:$LIBPTP2_VERSION_AGE
AC_SUBST(LIBPTP2_VERSION_INFO)

# Checks for programs.
AC_PROG_CC

# turn on warnings for gcc
if test "$ac_cv_prog_gcc" = "yes"; then
	CFLAGS="$CFLAGS -Wall -Wmissing-declarations -Wmissing-prototypes"
	LDFLAGS="$LDFLAGS -Wall"
fi

# Checks for libraries.

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([libintl.h stdlib.h string.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_STRUCT_TM

# Checks for library functions.
AC_FUNC_ERROR_AT_LINE
AC_FUNC_MALLOC
AC_FUNC_MKTIME
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([memset strchr strdup strtol getopt_long])

hostos=any
case $host in
	*-linux*)
	hostos=Linux
	AC_DEFINE([LINUX_OS], [], [Linux OS])
	;;
	*)
	AC_DEFINE([UNKNOWN_OS], [], [Unknown OS])
	;;
esac
AM_CONDITIONAL(LINUX_OS, test "x$hostos" = "xLinux")

build_ptpcam=yes
#check for --disable-ptpcam
AC_ARG_ENABLE([ptpcam],
	AC_HELP_STRING([--disable-ptpcam],
		[do not build ptpcam (default is to build ptpcam)])
)
if test "x$enable_ptpcam" = "xno"; then
	build_ptpcam=no
fi

AM_CONDITIONAL(PTPCAM, test "x$build_ptpcam" = "xyes")

# Check for libusb
if test "x$build_ptpcam" = "xyes"
then
AC_ARG_WITH([libusbdir],
	AC_HELP_STRING([--with-libusbdir=<path>],
			[libusb installation prefix path])
,[
	PTPCAM_CFLAGS="-I$withval/include"
	PTPCAM_LDFLAGS="-L$withval/lib -lusb"
	AC_SUBST(PTPCAM_CFLAGS)
	AC_SUBST(PTPCAM_LDFLAGS)
	CFLAGS_save="$CFLAGS"
	LDFLAGS_save="$LDFLAGS"
	CFLAGS="$CFLAGS $PTPCAM_CFLAGS"
	LDFLAGS="$LDFLAGS $PTPCAM_LDFLAGS"
	AC_CHECK_LIB(usb,usb_busses,
		[CFLAGS="$CFLAGS_save";LDFLAGS="$LDFLAGS_save"],
		[AC_ERROR([
*** You need at least version 0.1.8 of the libusb library to build ptpcam.
*** Download and istall it from http://sourceforge.net/projects/libusb/ or
*** use --disable-ptpcam option to build without ptpcam tool.
		])])
],[
	AC_PATH_PROG(LIBUSB_CONFIG,libusb-config)
	if test -n "${LIBUSB_CONFIG}"; then
		PTPCAM_CFLAGS="`$LIBUSB_CONFIG --cflags`"
		PTPCAM_LDFLAGS="`$LIBUSB_CONFIG --libs`"
		AC_SUBST(PTPCAM_CFLAGS)
		AC_SUBST(PTPCAM_LDFLAGS)
		CFLAGS_save="$CFLAGS"
		LDFLAGS_save="$LDFLAGS"
		CFLAGS="$CFLAGS $PTPCAM_CFLAGS"
		LDFLAGS="$LDFLAGS $PTPCAM_LDFLAGS"
		AC_CHECK_LIB(usb,usb_busses,
			[LIBUSB_VER="`$LIBUSB_CONFIG --version`"],
			[AC_ERROR([
*** You need at least version 0.1.8 of the libusb library to build ptpcam.
*** Download and istall it from http://sourceforge.net/projects/libusb/ or
*** use --disable-ptpcam option to build without ptpcam tool.
			])])
		CFLAGS="$CFLAGS_save"
		LDFLAGS="$LDFLAGS_save"
	fi
	
	LUSBMAJOR=${LIBUSB_VER%%.*}
	LIBUSB_VER=${LIBUSB_VER#${LUSBMAJOR}.}
	LUSBMINOR=${LIBUSB_VER%.*}
	LUSBPLEVL=${LIBUSB_VER#${LUSBMINOR}.}
	#We require exactly 0 major version here
	if test "$LUSBMAJOR" -eq "0"; then
		#We require at least 1 minor version number
		if test "$LUSBMINOR" -eq "1"; then
			#We requite at least patchlevel 8 and not 10
			case "$LUSBPLEVL" in
			[0-7])
				AC_ERROR([
*** You need at least version 0.1.8 of the libusb library to build ptpcam.
*** Download and istall it from http://sourceforge.net/projects/libusb/ or
*** use --disable-ptpcam option to build without ptpcam tool.
				])
				;;
			10)
				AC_MSG_WARN([
*** WARNING!!!
*** libusb-0.1.10 is known to be broken!
*** Pleasae use older or more recent version or procede at YOUR OWN RISK!
				])
				;;
			esac
		elif test "$LUSBMINOR" -lt "1"; then
			AC_ERROR([
*** You need at least version 0.1.8 of the libusb library to build ptpcam.
*** Download and istall it from http://sourceforge.net/projects/libusb/ or
*** use --disable-ptpcam option to build without ptpcam tool.
			])
		fi
	else
		AC_ERROR([
*** You need the 0 line of libusb which is at least 0.1.8. 
*** Higher versions might not be compatible! Download and istall
*** libusb version 0.X.X from http://sourceforge.net/projects/libusb/ or
*** use --disable-ptpcam option to build without ptpcam tool.
		])
	fi

fi
])

dnl Create a header file containing NetBSD-style byte swapping macros
AC_NEED_BYTEORDER_H(src/libptp-endian.h)
dnl Create a stdint.h-like file containing size-specific integer definitions
dnl that will always be available
AC_NEED_STDINT_H(src/libptp-stdint.h)

AC_CONFIG_FILES([ 
Makefile
src/Makefile
])
AC_OUTPUT