dnl These m4 macros are whitespace sensitive and break if moved around much.

m4_define([LU_VERSION_H], m4_include([libusb/version.h]))

m4_define([LU_DEFINE_VERSION_ATOM],

	[m4_define([$1], m4_bregexp(LU_VERSION_H,

	[^#define\s*$1\s*\([0-9]*\).*], [\1]))])

m4_define([LU_DEFINE_VERSION_RC_ATOM],

	[m4_define([$1], m4_bregexp(LU_VERSION_H,

	[^#define\s*$1\s*"\(-rc[0-9]*\)".*], [\1]))])

dnl The m4_bregexp() returns (only) the numbers following the #define named

dnl in the first macro parameter. m4_define() then defines the name for use

dnl in AC_INIT().

LU_DEFINE_VERSION_ATOM([LIBUSB_MAJOR])

LU_DEFINE_VERSION_ATOM([LIBUSB_MINOR])

LU_DEFINE_VERSION_ATOM([LIBUSB_MICRO])

LU_DEFINE_VERSION_RC_ATOM([LIBUSB_RC])

AC_INIT([libusb], LIBUSB_MAJOR[.]LIBUSB_MINOR[.]LIBUSB_MICRO[]LIBUSB_RC, [libusb-devel@lists.sourceforge.net], [libusb], [http://www.libusb.org/])

# Library versioning

# These numbers should be tweaked on every release. Read carefully:

# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html

# http://sourceware.org/autobook/autobook/autobook_91.html

lt_current="1"

lt_revision="0"

lt_age="1"

LTLDFLAGS="-version-info ${lt_current}:${lt_revision}:${lt_age}"

AM_INIT_AUTOMAKE

AM_MAINTAINER_MODE

AC_CONFIG_SRCDIR([libusb/core.c])

AC_CONFIG_MACRO_DIR([m4])

AM_CONFIG_HEADER([config.h])

m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])

AC_PREREQ([2.50])

AC_PROG_CC

AC_PROG_LIBTOOL

LT_LANG([Windows Resource])

AC_C_INLINE

AM_PROG_CC_C_O

AC_DEFINE([_GNU_SOURCE], 1, [Use GNU extensions])

LTLDFLAGS="${LTLDFLAGS} -no-undefined"

AC_MSG_CHECKING([operating system])

case $host in

*-linux*)

	AC_MSG_RESULT([Linux])

	backend="linux"

	;;

*-darwin*)

	AC_MSG_RESULT([Darwin/Mac OS X])

	backend="darwin"

	;;

*-openbsd*)

	AC_MSG_RESULT([OpenBSD])

	backend="openbsd"

	;;

*-netbsd*)

	AC_MSG_RESULT([NetBSD (using OpenBSD backend)])

	backend="openbsd"

	;;

*-mingw*)

	AC_MSG_RESULT([Windows])

	backend="windows"

	;;

*-cygwin*)

	AC_MSG_RESULT([Cygwin (using Windows backend)])

	backend="windows"

	threads="posix"

	;;

*)

	AC_MSG_ERROR([unsupported operating system])

esac

case $backend in

linux)

	AC_DEFINE(OS_LINUX, 1, [Linux backend])

	AC_SUBST(OS_LINUX)

	AC_CHECK_LIB(rt, clock_gettime, PC_LIBS_PRIVATE="-lrt")

	threads="posix"

	THREAD_CFLAGS="-pthread"

	PC_LIBS_PRIVATE="${PC_LIBS_PRIVATE} -pthread"

	AC_CHECK_HEADERS([poll.h])

	AC_DEFINE([POLL_NFDS_TYPE],[nfds_t],[type of second poll() argument])

	;;

darwin)

	AC_DEFINE(OS_DARWIN, 1, [Darwin backend])

	AC_SUBST(OS_DARWIN)

	threads="posix"

	PC_LIBS_PRIVATE="-lobjc -Wl,-framework,IOKit -Wl,-framework,CoreFoundation"

	LTLDFLAGS="${LTLDFLAGS} -Wl,-prebind"

	AC_CHECK_HEADERS([poll.h])

	AC_CHECK_TYPE([nfds_t],

		[AC_DEFINE([POLL_NFDS_TYPE],[nfds_t],[type of second poll() argument])],

		[AC_DEFINE([POLL_NFDS_TYPE],[unsigned int],[type of second poll() argument])],

		[#include <poll.h>])</poll.h>

	;;

openbsd)

	AC_DEFINE(OS_OPENBSD, 1, [OpenBSD backend])

	AC_SUBST(OS_OPENBSD)

	threads="posix"

	THREAD_CFLAGS="-pthread"

	PC_LIBS_PRIVATE="-pthread"

	AC_CHECK_HEADERS([poll.h])

	AC_DEFINE([POLL_NFDS_TYPE],[nfds_t],[type of second poll() argument])

	;;

windows)

	AC_DEFINE(OS_WINDOWS, 1, [Windows backend])

	AC_SUBST(OS_WINDOWS)

	PC_LIBS_PRIVATE=""

	LTLDFLAGS="${LTLDFLAGS} -avoid-version -Wl,--add-stdcall-alias"

	AC_DEFINE([POLL_NFDS_TYPE],[unsigned int],[type of second poll() argument])

	;;

esac

AC_SUBST(THREAD_CFLAGS)

AC_SUBST(PC_LIBS_PRIVATE)

LIBS="${LIBS} ${PC_LIBS_PRIVATE}"

AM_CONDITIONAL(OS_LINUX, test "x$backend" = xlinux)

AM_CONDITIONAL(OS_DARWIN, test "x$backend" = xdarwin)

AM_CONDITIONAL(OS_OPENBSD, test "x$backend" = xopenbsd)

AM_CONDITIONAL(OS_WINDOWS, test "x$backend" = xwindows)

AM_CONDITIONAL(THREADS_POSIX, test "x$threads" = xposix)

if test "$threads" = posix; then

	AC_DEFINE(THREADS_POSIX, 1, [Use POSIX Threads])

fi

# timerfd

AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=1], [timerfd_h=0])

AC_ARG_ENABLE([timerfd],

	[AS_HELP_STRING([--enable-timerfd],

		[use timerfd for timing (default auto)])],

	[use_timerfd=$enableval], [use_timerfd='auto'])

if test "x$use_timerfd" = "xyes" -a "x$timerfd_h" = "x0"; then

	AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required])

fi

AC_CHECK_DECL([TFD_NONBLOCK], [tfd_hdr_ok=yes], [tfd_hdr_ok=no], [#include <sys timerfd.h="">])</sys>

if test "x$use_timerfd" = "xyes" -a "x$tfd_hdr_ok" = "xno"; then

	AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required])

fi

AC_MSG_CHECKING([whether to use timerfd for timing])

if test "x$use_timerfd" = "xno"; then

	AC_MSG_RESULT([no (disabled by user)])

else

	if test "x$timerfd_h" = "x1" -a "x$tfd_hdr_ok" = "xyes"; then

		AC_MSG_RESULT([yes])

		AC_DEFINE(USBI_TIMERFD_AVAILABLE, 1, [timerfd headers available])

	else

		AC_MSG_RESULT([no (header not available)])

	fi

fi

AC_CHECK_TYPES(struct timespec)

# Message logging

AC_ARG_ENABLE([log], [AS_HELP_STRING([--disable-log], [disable all logging])],

	[log_enabled=$enableval],

	[log_enabled='yes'])

if test "x$log_enabled" != "xno"; then

	AC_DEFINE([ENABLE_LOGGING], 1, [Message logging])

fi

AC_ARG_ENABLE([debug-log], [AS_HELP_STRING([--enable-debug-log],

	[enable debug logging (default n)])],

	[debug_log_enabled=$enableval],

	[debug_log_enabled='no'])

if test "x$debug_log_enabled" != "xno"; then

	AC_DEFINE([ENABLE_DEBUG_LOGGING], 1, [Debug message logging])

fi

# Examples build

AC_ARG_ENABLE([examples-build], [AS_HELP_STRING([--enable-examples-build],

	[build example applications (default n)])],

	[build_examples=$enableval],

	[build_examples='no'])

AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != "xno"])

# check for -fvisibility=hidden compiler support (GCC >= 3.4)

saved_cflags="$CFLAGS"

# -Werror required for cygwin

CFLAGS="$CFLAGS -Werror -fvisibility=hidden"

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],

	[VISIBILITY_CFLAGS="-fvisibility=hidden"

	 AC_DEFINE([DEFAULT_VISIBILITY], [__attribute__((visibility("default")))], [Default visibility]) ],

	[ VISIBILITY_CFLAGS=""

	 AC_DEFINE([DEFAULT_VISIBILITY], [], [Default visibility]) ],

	])

CFLAGS="$saved_cflags"

# check for -Wno-pointer-sign compiler support (GCC >= 4)

saved_cflags="$CFLAGS"

CFLAGS="$CFLAGS -Wno-pointer-sign"

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],

	nopointersign_cflags="-Wno-pointer-sign", nopointersign_cflags="")

CFLAGS="$saved_cflags"

# sigaction not available on MinGW

AC_CHECK_FUNC([sigaction], [have_sigaction=yes], [have_sigaction=no])

AM_CONDITIONAL([HAVE_SIGACTION], [test "x$have_sigaction" = "xyes"])

# headers not available on all platforms but required on others

AC_CHECK_HEADERS([sys/time.h])

AC_CHECK_FUNCS(gettimeofday)

AM_CFLAGS="-std=gnu99 -Wall -Wundef -Wunused -Wstrict-prototypes -Werror-implicit-function-declaration $nopointersign_cflags -Wshadow"

AC_SUBST(VISIBILITY_CFLAGS)

AC_SUBST(AM_CFLAGS)

AC_SUBST(LTLDFLAGS)

AC_CONFIG_FILES([libusb-1.0.pc])

AC_CONFIG_FILES([Makefile])

AC_CONFIG_FILES([libusb/Makefile])

AC_CONFIG_FILES([examples/Makefile])

AC_CONFIG_FILES([doc/Makefile])

AC_CONFIG_FILES([doc/doxygen.cfg])

AC_OUTPUT