1 dnl These m4 macros are whitespace sensitive and break if moved around much.
2 m4_define([LU_VERSION_H], m4_include([libusb/version.h]))
3 m4_define([LU_DEFINE_VERSION_ATOM],
4 [m4_define([$1], m4_bregexp(LU_VERSION_H,
5 [^#define\s*$1\s*\([0-9]*\).*], [\1]))])
6 m4_define([LU_DEFINE_VERSION_RC_ATOM],
7 [m4_define([$1], m4_bregexp(LU_VERSION_H,
8 [^#define\s*$1\s*"\(-rc[0-9]*\)".*], [\1]))])
9 dnl The m4_bregexp() returns (only) the numbers following the #define named
10 dnl in the first macro parameter. m4_define() then defines the name for use
13 LU_DEFINE_VERSION_ATOM([LIBUSB_MAJOR])
14 LU_DEFINE_VERSION_ATOM([LIBUSB_MINOR])
15 LU_DEFINE_VERSION_ATOM([LIBUSB_MICRO])
16 LU_DEFINE_VERSION_RC_ATOM([LIBUSB_RC])
19 AC_INIT([libusb-1.0], [LIBUSB_MAJOR[.]LIBUSB_MINOR[.]LIBUSB_MICRO[]LIBUSB_RC], [libusb-devel@lists.sourceforge.net], [libusb-1.0], [http://libusb.info])
20 AC_CONFIG_HEADERS([config.h])
21 AC_CONFIG_SRCDIR([libusb/core.c])
22 AC_CONFIG_MACRO_DIR([m4])
28 LT_LANG([Windows Resource])
30 dnl Library versioning
31 dnl These numbers should be tweaked on every release. Read carefully:
32 dnl http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
33 dnl http://sourceware.org/autobook/autobook/autobook_91.html
37 LT_LDFLAGS="-version-info ${lt_current}:${lt_revision}:${lt_age} -no-undefined"
39 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
44 dnl check for -std=gnu11 compiler support (optional)
45 dnl note that we don't just check if the compiler accepts '-std=x11'
46 dnl but also that it supports the _Thread_local keyword because some compilers
47 dnl (e.g. gcc 4.8) accept the command line option but do not implement TLS
48 saved_CFLAGS="${CFLAGS}"
50 AC_MSG_CHECKING([if $CC supports -std=gnu11])
51 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([_Thread_local int x;], [x = 42;])],
56 if test "x$c_dialect" != xgnu; then
57 dnl fallback check for -std=c11 compiler support (required)
59 AC_MSG_CHECKING([if $CC supports -std=c11])
60 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([_Thread_local int x;], [x = 42;])],
61 [AC_MSG_RESULT([yes])],
63 AC_MSG_ERROR([compiler with C11 support is required to build libusb])])
66 CFLAGS="${saved_CFLAGS}"
68 AC_DEFINE([_GNU_SOURCE], [1], [Enable GNU extensions.])
69 AC_DEFINE([DEFAULT_VISIBILITY], [__attribute__ ((visibility ("default")))], [Define to the attribute for default visibility.])
73 AC_MSG_CHECKING([operating system])
76 AC_MSG_RESULT([Darwin/Mac OS X])
82 AC_MSG_RESULT([Haiku])
87 *-linux* | *-uclinux*)
88 dnl on Android Linux, some functions are in different places
91 AC_MSG_RESULT([Android Linux])
95 AC_MSG_RESULT([Linux])
103 AC_MSG_RESULT([NetBSD])
109 AC_MSG_RESULT([OpenBSD])
115 AC_MSG_RESULT([SunOS])
121 AC_MSG_RESULT([Windows (using Cygwin)])
127 AC_MSG_RESULT([Windows])
131 test "x$enable_shared" = xyes && create_import_lib=yes
132 EXTRA_CFLAGS="-fno-omit-frame-pointer"
135 AC_MSG_RESULT([Null])
136 AC_MSG_WARN([The host being compiled for is not supported.])
137 AC_MSG_WARN([The library may compile but will not function in any useful manner.])
144 if test "x$poll" = xposix; then
145 AC_DEFINE([POLL_POSIX], [1], [Define to 1 if using the POSIX poll() implementation.])
146 AC_CHECK_TYPES([nfds_t], [], [], [[#include <poll.h>]])
147 AC_CHECK_FUNCS([pipe2])
148 elif test "x$poll" = xwindows; then
149 AC_DEFINE([POLL_WINDOWS], [1], [Define to 1 if using the Windows poll() implementation.])
151 AC_MSG_ERROR([Unknown poll implementation])
154 if test "x$threads" = xposix; then
155 AC_DEFINE([THREADS_POSIX], [1], [Define to 1 if using POSIX threads.])
156 AC_SUBST(THREAD_CFLAGS, [-pthread])
157 dnl Android Linux and Darwin provide pthread functions directly in libc
158 dnl glibc also provides some pthread functions directly, so search for a thread-specific function
159 AC_SEARCH_LIBS([pthread_key_create], [pthread], [AC_SUBST(THREAD_LIBS, [-lpthread])], [], [])
160 elif test "x$threads" = xwindows; then
161 AC_DEFINE([THREADS_WINDOWS], [1], [Define to 1 if using Windows threads.])
163 AC_MSG_ERROR([Unknown threads implementation])
168 AC_CHECK_FUNCS([pthread_threadid_np])
169 LIBS="${LIBS} -lobjc -Wl,-framework,IOKit -Wl,-framework,CoreFoundation"
175 AC_SEARCH_LIBS([clock_gettime], [rt], [], [], [])
176 AC_CHECK_FUNCS([pthread_setname_np])
177 AC_ARG_ENABLE([udev],
178 [AC_HELP_STRING([--enable-udev], [use udev for device enumeration and hotplug support (recommended) [default=yes]])],
179 [use_udev=$enableval], [use_udev=yes])
180 if test "x$use_udev" = xyes; then
181 dnl system has udev. use it or fail!
182 AC_CHECK_HEADER([libudev.h], [], [AC_MSG_ERROR([udev support requested but libudev header not installed])])
183 AC_CHECK_LIB([udev], [udev_new], [], [AC_MSG_ERROR([udev support requested but libudev not installed])])
185 AC_CHECK_HEADERS([asm/types.h])
186 AC_CHECK_HEADER([linux/netlink.h], [], [AC_MSG_ERROR([Linux netlink header not found])])
187 AC_CHECK_HEADER([sys/socket.h], [], [AC_MSG_ERROR([Linux socket header not found])])
191 LIBS="${LIBS} -ldevinfo"
194 AC_CHECK_TYPES([struct timespec], [], [], [[#include <time.h>]])
195 AC_DEFINE([_WIN32_WINNT], [_WIN32_WINNT_VISTA], [Define to the oldest supported Windows version.])
196 dnl Cygwin and MSYS compilers do not define _WIN32 as MinGW and MSVC do
197 dnl simplify checks for Windows compilation by ensuring it is always defined
198 EXTRA_CPPFLAGS="-D_WIN32"
199 LT_LDFLAGS="${LT_LDFLAGS} -avoid-version -Wl,--add-stdcall-alias"
202 dnl no special handling required
206 dnl headers not available on all platforms but required on others
207 AC_CHECK_HEADERS([sys/time.h])
209 dnl the clock_gettime() function needs certain clock IDs defined
210 AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [have_clock_gettime=])
211 if test "x$have_clock_gettime" = xyes; then
212 AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]])
213 AC_CHECK_DECL([CLOCK_MONOTONIC], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_MONOTONIC])], [[#include <time.h>]])
214 elif test "x$backend" != xdarwin && test "x$backend" != xwindows; then
215 AC_MSG_ERROR([clock_gettime() is required on this platform])
219 if test "x$backend" = xlinux || test "x$backend" = xsunos; then
220 AC_ARG_ENABLE([timerfd],
221 [AS_HELP_STRING([--enable-timerfd], [use timerfd for timing [default=auto]])],
222 [use_timerfd=$enableval],
224 if test "x$use_timerfd" != xno; then
225 AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=yes], [timerfd_h=])
226 if test "x$timerfd_h" = xyes; then
227 AC_CHECK_DECLS([TFD_NONBLOCK, TFD_CLOEXEC], [timerfd_h_ok=yes], [timerfd_h_ok=], [[#include <sys/timerfd.h>]])
228 if test "x$timerfd_h_ok" = xyes; then
229 AC_CHECK_FUNC([timerfd_create], [timerfd_ok=yes], [timerfd_ok=])
230 if test "x$timerfd_ok" = xyes; then
231 AC_DEFINE([HAVE_TIMERFD], [1], [Define to 1 if the system has timerfd functionality.])
232 elif test "x$use_timerfd" = xyes; then
233 AC_MSG_ERROR([timerfd_create() function not found; glibc 2.9+ required])
235 elif test "x$use_timerfd" = xyes; then
236 AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required])
238 elif test "x$use_timerfd" = xyes; then
239 AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required])
242 AC_MSG_CHECKING([whether to use timerfd for timing])
243 if test "x$use_timerfd" = xno; then
244 AC_MSG_RESULT([no (disabled by user)])
245 elif test "x$timerfd_h" != xyes; then
246 AC_MSG_RESULT([no (header not available)])
247 elif test "x$timerfd_h_ok" != xyes; then
248 AC_MSG_RESULT([no (header not usable)])
249 elif test "x$timerfd_ok" != xyes; then
250 AC_MSG_RESULT([no (functions not available)])
258 [AS_HELP_STRING([--disable-log], [disable all logging])],
259 [log_enabled=$enableval],
261 if test "x$log_enabled" != xno; then
262 AC_DEFINE([ENABLE_LOGGING], [1], [Define to 1 to enable message logging.])
265 AC_ARG_ENABLE([debug-log],
266 [AS_HELP_STRING([--enable-debug-log], [start with debug message logging enabled [default=no]])],
267 [debug_log_enabled=$enableval],
268 [debug_log_enabled=no])
269 if test "x$debug_log_enabled" != xno; then
270 AC_DEFINE([ENABLE_DEBUG_LOGGING], [1], [Define to 1 to start with debug message logging enabled.])
273 AC_ARG_ENABLE([system-log],
274 [AS_HELP_STRING([--enable-system-log], [output logging messages to the systemwide log, if supported by the OS [default=no]])],
275 [system_log_enabled=$enableval],
276 [system_log_enabled=no])
277 if test "x$system_log_enabled" != xno; then
278 AC_DEFINE([USE_SYSTEM_LOGGING_FACILITY], [1], [Define to 1 to output logging messages to the systemwide log.])
279 if test "x$backend" != xwindows && test "x$is_android_linux" != xyes; then
280 dnl Check if syslog is available in standard C library
281 AC_CHECK_HEADER([syslog.h], [syslog_h=yes], [syslog_h=])
282 if test "x$syslog_h" = xyes; then
283 AC_CHECK_FUNCS([syslog])
289 AC_ARG_ENABLE([examples-build],
290 [AS_HELP_STRING([--enable-examples-build], [build example applications [default=no]])],
291 [build_examples=$enableval],
293 if test "x$build_examples" != xno; then
294 dnl sigaction needed for some example programs
295 AC_CHECK_FUNC([sigaction], [have_sigaction=yes], [have_sigaction=])
299 AC_ARG_ENABLE([tests-build],
300 [AS_HELP_STRING([--enable-tests-build], [build test applications [default=no]])],
301 [build_tests=$enableval],
304 AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != xno])
305 AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno])
306 AM_CONDITIONAL([CREATE_IMPORT_LIB], [test "x$create_import_lib" = xyes])
307 AM_CONDITIONAL([HAVE_SIGACTION], [test "x$have_sigaction" = xyes])
308 AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = xdarwin])
309 AM_CONDITIONAL([OS_HAIKU], [test "x$backend" = xhaiku])
310 AM_CONDITIONAL([OS_LINUX], [test "x$backend" = xlinux])
311 AM_CONDITIONAL([OS_NETBSD], [test "x$backend" = xnetbsd])
312 AM_CONDITIONAL([OS_NULL], [test "x$backend" = xnull])
313 AM_CONDITIONAL([OS_OPENBSD], [test "x$backend" = xopenbsd])
314 AM_CONDITIONAL([OS_SUNOS], [test "x$backend" = xsunos])
315 AM_CONDITIONAL([OS_WINDOWS], [test "x$backend" = xwindows])
316 AM_CONDITIONAL([POLL_POSIX], [test "x$poll" = xposix])
317 AM_CONDITIONAL([POLL_WINDOWS], [test "x$poll" = xwindows])
318 AM_CONDITIONAL([THREADS_POSIX], [test "x$threads" = xposix])
319 AM_CONDITIONAL([THREADS_WINDOWS], [test "x$threads" = xwindows])
320 AM_CONDITIONAL([USE_UDEV], [test "x$use_udev" = xyes])
322 dnl The -Wcast-function-type warning causes a flurry of warnings when compiling
323 dnl Windows with GCC 8 or later because of dynamically loaded functions
324 if test "x$backend" = xwindows; then
325 saved_CFLAGS="${CFLAGS}"
326 CFLAGS="-Werror -Wcast-function-type"
327 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])],
328 [EXTRA_CFLAGS="${EXTRA_CFLAGS} -Wno-cast-function-type"],
330 CFLAGS="${saved_CFLAGS}"
333 SHARED_CFLAGS="-Wall -Wextra -Wshadow -Wunused -Wwrite-strings -Werror=format-security -Werror=implicit-function-declaration -Werror=implicit-int -Werror=init-self -Werror=missing-prototypes -Werror=strict-prototypes -Werror=undef -Werror=uninitialized"
335 AM_CPPFLAGS="${EXTRA_CPPFLAGS}"
336 AC_SUBST(AM_CPPFLAGS)
338 AM_CFLAGS="-std=${c_dialect}11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS}"
341 AM_CXXFLAGS="-std=${c_dialect}++11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS} -Wmissing-declarations"
342 AC_SUBST(AM_CXXFLAGS)
346 dnl set name of html output directory for doxygen
347 AC_SUBST(DOXYGEN_HTMLDIR, [api-1.0])
349 AC_CONFIG_FILES([libusb-1.0.pc])
350 AC_CONFIG_FILES([Makefile])
351 AC_CONFIG_FILES([libusb/Makefile])
352 AC_CONFIG_FILES([examples/Makefile])
353 AC_CONFIG_FILES([tests/Makefile])
354 AC_CONFIG_FILES([doc/Makefile])
355 AC_CONFIG_FILES([doc/doxygen.cfg])