1dnl These m4 macros are whitespace sensitive and break if moved around much. 2m4_define([LU_VERSION_H], m4_include([libusb/version.h])) 3m4_define([LU_DEFINE_VERSION_ATOM], 4 [m4_define([$1], m4_bregexp(LU_VERSION_H, 5 [^#define\s*$1\s*\([0-9]*\).*], [\1]))]) 6m4_define([LU_DEFINE_VERSION_RC_ATOM], 7 [m4_define([$1], m4_bregexp(LU_VERSION_H, 8 [^#define\s*$1\s*"\(-rc[0-9]*\)".*], [\1]))]) 9dnl The m4_bregexp() returns (only) the numbers following the #define named 10dnl in the first macro parameter. m4_define() then defines the name for use 11dnl in AC_INIT. 12 13LU_DEFINE_VERSION_ATOM([LIBUSB_MAJOR]) 14LU_DEFINE_VERSION_ATOM([LIBUSB_MINOR]) 15LU_DEFINE_VERSION_ATOM([LIBUSB_MICRO]) 16LU_DEFINE_VERSION_RC_ATOM([LIBUSB_RC]) 17 18AC_PREREQ([2.69]) 19AC_INIT([libusb-1.0], [LIBUSB_MAJOR[.]LIBUSB_MINOR[.]LIBUSB_MICRO[]LIBUSB_RC], [libusb-devel@lists.sourceforge.net], [libusb-1.0], [http://libusb.info]) 20AC_CONFIG_HEADERS([config.h]) 21AC_CONFIG_SRCDIR([libusb/core.c]) 22AC_CONFIG_MACRO_DIR([m4]) 23AC_PROG_CC 24AC_PROG_CXX 25AC_C_INLINE 26AM_INIT_AUTOMAKE 27LT_INIT 28LT_LANG([Windows Resource]) 29 30dnl Library versioning 31dnl These numbers should be tweaked on every release. Read carefully: 32dnl http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html 33dnl http://sourceware.org/autobook/autobook/autobook_91.html 34lt_current=3 35lt_revision=0 36lt_age=3 37LT_LDFLAGS="-version-info ${lt_current}:${lt_revision}:${lt_age} -no-undefined" 38 39m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])]) 40 41EXTRA_CPPFLAGS= 42EXTRA_CFLAGS= 43 44dnl check for -std=gnu11 compiler support (optional) 45dnl note that we don't just check if the compiler accepts '-std=x11' 46dnl but also that it supports the _Thread_local keyword because some compilers 47dnl (e.g. gcc 4.8) accept the command line option but do not implement TLS 48saved_CFLAGS="${CFLAGS}" 49CFLAGS="-std=gnu11" 50AC_MSG_CHECKING([if $CC supports -std=gnu11]) 51AC_COMPILE_IFELSE([AC_LANG_PROGRAM([_Thread_local int x;], [x = 42;])], 52 [AC_MSG_RESULT([yes]) 53 c_dialect=gnu], 54 [AC_MSG_RESULT([no]) 55 c_dialect=]) 56if test "x$c_dialect" != xgnu; then 57 dnl fallback check for -std=c11 compiler support (required) 58 CFLAGS="-std=c11" 59 AC_MSG_CHECKING([if $CC supports -std=c11]) 60 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([_Thread_local int x;], [x = 42;])], 61 [AC_MSG_RESULT([yes])], 62 [AC_MSG_RESULT([no]) 63 AC_MSG_ERROR([compiler with C11 support is required to build libusb])]) 64 c_dialect=c 65fi 66CFLAGS="${saved_CFLAGS}" 67 68AC_DEFINE([_GNU_SOURCE], [1], [Enable GNU extensions.]) 69AC_DEFINE([DEFAULT_VISIBILITY], [__attribute__ ((visibility ("default")))], [Define to the attribute for default visibility.]) 70AC_DEFINE([PRINTF_FORMAT(a, b)], [__attribute__ ((__format__ (__printf__, a, b)))], [Define to the attribute for enabling parameter checks on printf-like functions.]) 71 72create_import_lib= 73is_android_linux= 74AC_MSG_CHECKING([operating system]) 75case $host in 76*-darwin*) 77 AC_MSG_RESULT([Darwin/Mac OS X]) 78 backend=darwin 79 platform=posix 80 ;; 81*-haiku*) 82 AC_MSG_RESULT([Haiku]) 83 backend=haiku 84 platform=posix 85 ;; 86*-linux* | *-uclinux*) 87 dnl on Android Linux, some functions are in different places 88 case $host in 89 *-linux-android*) 90 AC_MSG_RESULT([Android Linux]) 91 is_android_linux=yes 92 ;; 93 *) 94 AC_MSG_RESULT([Linux]) 95 ;; 96 esac 97 backend=linux 98 platform=posix 99 ;; 100*-netbsd*) 101 AC_MSG_RESULT([NetBSD]) 102 backend=netbsd 103 platform=posix 104 ;; 105*-openbsd*) 106 AC_MSG_RESULT([OpenBSD]) 107 backend=openbsd 108 platform=posix 109 ;; 110*-solaris*) 111 AC_MSG_RESULT([SunOS]) 112 backend=sunos 113 platform=posix 114 ;; 115*-cygwin*) 116 AC_MSG_RESULT([Windows (using Cygwin)]) 117 backend=windows 118 platform=windows 119 EXTRA_CFLAGS="-mwin32" 120 ;; 121*-mingw* | *msys*) 122 AC_MSG_RESULT([Windows]) 123 backend=windows 124 platform=windows 125 test "x$enable_shared" = xyes && create_import_lib=yes 126 EXTRA_CFLAGS="-mwin32 -fno-omit-frame-pointer" 127 EXTRA_LDFLAGS="-static-libgcc" 128 ;; 129*) 130 AC_MSG_RESULT([Null]) 131 AC_MSG_WARN([The host being compiled for is not supported.]) 132 AC_MSG_WARN([The library may compile but will not function in any useful manner.]) 133 backend=null 134 platform=posix 135 ;; 136esac 137 138if test "x$platform" = xposix; then 139 AC_DEFINE([PLATFORM_POSIX], [1], [Define to 1 if compiling for a POSIX platform.]) 140 AC_CHECK_TYPES([nfds_t], [], [], [[#include <poll.h>]]) 141 AC_CHECK_FUNCS([pipe2]) 142 dnl Some compilers do not support the '-pthread' option so check for it here 143 saved_CFLAGS="${CFLAGS}" 144 CFLAGS="-Wall -Werror -pthread" 145 AC_MSG_CHECKING([if $CC recognizes -pthread]) 146 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 147 [AC_MSG_RESULT([yes]) 148 AC_SUBST(THREAD_CFLAGS, [-pthread])], 149 [AC_MSG_RESULT([no])]) 150 CFLAGS="${saved_CFLAGS}" 151 dnl Android Linux and Darwin provide pthread functions directly in libc 152 dnl glibc also provides some pthread functions directly, so search for a thread-specific function 153 AC_SEARCH_LIBS([pthread_create], [pthread], 154 [test "x$ac_cv_search_pthread_create" != "xnone required" && AC_SUBST(THREAD_LIBS, [-lpthread])], 155 [], []) 156 AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic]) 157elif test "x$platform" = xwindows; then 158 AC_DEFINE([PLATFORM_WINDOWS], [1], [Define to 1 if compiling for a Windows platform.]) 159else 160 AC_MSG_ERROR([Unknown platform]) 161fi 162 163case $backend in 164darwin) 165 AC_CHECK_FUNCS([pthread_threadid_np]) 166 LIBS="${LIBS} -lobjc -Wl,-framework,IOKit -Wl,-framework,CoreFoundation -Wl,-framework,Security" 167 AC_CHECK_HEADERS([IOKit/usb/IOUSBHostFamilyDefinitions.h]) 168 ;; 169haiku) 170 LIBS="${LIBS} -lbe" 171 ;; 172linux) 173 AC_SEARCH_LIBS([clock_gettime], [rt], [], [], []) 174 AC_CHECK_FUNCS([pthread_setname_np]) 175 AC_ARG_ENABLE([udev], 176 [AS_HELP_STRING([--enable-udev], [use udev for device enumeration and hotplug support (recommended) [default=yes]])], 177 [use_udev=$enableval], [use_udev=yes]) 178 if test "x$use_udev" = xyes; then 179 dnl system has udev. use it or fail! 180 AC_CHECK_HEADER([libudev.h], [], [AC_MSG_ERROR([udev support requested but libudev header not installed])]) 181 AC_CHECK_LIB([udev], [udev_new], [], [AC_MSG_ERROR([udev support requested but libudev not installed])]) 182 183 # We can build umockdev tests (if available) 184 PKG_PROG_PKG_CONFIG 185 PKG_CHECK_MODULES(UMOCKDEV, umockdev-1.0 >= 0.16.0, ac_have_umockdev=yes, ac_have_umockdev=no) 186 PKG_CHECK_MODULES(UMOCKDEV_HOTPLUG, umockdev-1.0 >= 0.17.7, ac_umockdev_hotplug=yes, ac_umockdev_hotplug=no) 187 if test "x$ac_umockdev_hotplug" = xyes; then 188 AC_DEFINE([UMOCKDEV_HOTPLUG], [1], [UMockdev hotplug code is not racy]) 189 fi 190 else 191 AC_CHECK_HEADERS([asm/types.h]) 192 AC_CHECK_HEADER([linux/netlink.h], [], [AC_MSG_ERROR([Linux netlink header not found])]) 193 AC_CHECK_HEADER([sys/socket.h], [], [AC_MSG_ERROR([Linux socket header not found])]) 194 fi 195 ;; 196sunos) 197 LIBS="${LIBS} -ldevinfo" 198 ;; 199windows) 200 AC_CHECK_TYPES([struct timespec], [], [], [[#include <time.h>]]) 201 AC_DEFINE([_WIN32_WINNT], [_WIN32_WINNT_VISTA], [Define to the oldest supported Windows version.]) 202 LT_LDFLAGS="${LT_LDFLAGS} -avoid-version -Wl,--add-stdcall-alias" 203 ;; 204*) 205 dnl no special handling required 206 ;; 207esac 208 209dnl headers not available on all platforms but required on others 210AC_CHECK_HEADERS([sys/time.h]) 211 212if test "x$platform" = xposix; then 213 dnl check availability of clock_gettime() 214 if test "x$backend" = xdarwin; then 215 dnl need to verify that OS X target is 10.12 or later for clock_gettime() 216 AC_MSG_CHECKING([whether OS X target version is 10.12 or later]) 217 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ 218 #include <AvailabilityMacros.h> 219 #if MAC_OS_X_VERSION_MIN_REQUIRED < 101200 220 # error "Target OS X version is too old" 221 #endif 222 ], [])], 223 [AC_MSG_RESULT([yes]) 224 osx_10_12_or_later=yes], 225 [AC_MSG_RESULT([no]) 226 osx_10_12_or_later=]) 227 if test "x$osx_10_12_or_later" = xyes; then 228 AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [have_clock_gettime=]) 229 else 230 AC_MSG_NOTICE([clock_gettime() is not available on target OS X version]) 231 fi 232 else 233 AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [AC_MSG_ERROR([clock_gettime() is required on this platform])]) 234 fi 235 236 if test "x$have_clock_gettime" = xyes; then 237 dnl the clock_gettime() function needs certain clock IDs defined 238 AC_CHECK_DECL([CLOCK_MONOTONIC], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_MONOTONIC])], [[#include <time.h>]]) 239 dnl use the monotonic clock for condition variable timed waits if possible 240 AC_CHECK_FUNCS([pthread_condattr_setclock], [need_clock_realtime=], [need_clock_realtime=yes]) 241 if test "x$need_clock_realtime" = xyes; then 242 AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]]) 243 fi 244 fi 245fi 246 247dnl eventfd support 248if test "x$backend" = xlinux || test "x$backend" = xsunos; then 249 AC_ARG_ENABLE([eventfd], 250 [AS_HELP_STRING([--enable-eventfd], [use eventfd for signalling [default=auto]])], 251 [use_eventfd=$enableval], 252 [use_eventfd=auto]) 253 if test "x$use_eventfd" != xno; then 254 AC_CHECK_HEADER([sys/eventfd.h], [eventfd_h=yes], [eventfd_h=]) 255 if test "x$eventfd_h" = xyes; then 256 AC_CHECK_DECLS([EFD_NONBLOCK, EFD_CLOEXEC], [eventfd_h_ok=yes], [eventfd_h_ok=], [[#include <sys/eventfd.h>]]) 257 if test "x$eventfd_h_ok" = xyes; then 258 AC_CHECK_FUNC([eventfd], [eventfd_ok=yes], [eventfd_ok=]) 259 if test "x$eventfd_ok" = xyes; then 260 AC_DEFINE([HAVE_EVENTFD], [1], [Define to 1 if the system has eventfd functionality.]) 261 elif test "x$use_eventfd" = xyes; then 262 AC_MSG_ERROR([eventfd() function not found; glibc 2.9+ required]) 263 fi 264 elif test "x$use_eventfd" = xyes; then 265 AC_MSG_ERROR([eventfd header not usable; glibc 2.9+ required]) 266 fi 267 elif test "x$use_eventfd" = xyes; then 268 AC_MSG_ERROR([eventfd header not available; glibc 2.9+ required]) 269 fi 270 fi 271 AC_MSG_CHECKING([whether to use eventfd for signalling]) 272 if test "x$use_eventfd" = xno; then 273 AC_MSG_RESULT([no (disabled by user)]) 274 elif test "x$eventfd_h" != xyes; then 275 AC_MSG_RESULT([no (header not available)]) 276 elif test "x$eventfd_h_ok" != xyes; then 277 AC_MSG_RESULT([no (header not usable)]) 278 elif test "x$eventfd_ok" != xyes; then 279 AC_MSG_RESULT([no (functions not available)]) 280 else 281 AC_MSG_RESULT([yes]) 282 fi 283fi 284 285dnl timerfd support 286if test "x$backend" = xlinux || test "x$backend" = xsunos; then 287 AC_ARG_ENABLE([timerfd], 288 [AS_HELP_STRING([--enable-timerfd], [use timerfd for timing [default=auto]])], 289 [use_timerfd=$enableval], 290 [use_timerfd=auto]) 291 if test "x$use_timerfd" != xno; then 292 AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=yes], [timerfd_h=]) 293 if test "x$timerfd_h" = xyes; then 294 AC_CHECK_DECLS([TFD_NONBLOCK, TFD_CLOEXEC], [timerfd_h_ok=yes], [timerfd_h_ok=], [[#include <sys/timerfd.h>]]) 295 if test "x$timerfd_h_ok" = xyes; then 296 AC_CHECK_FUNC([timerfd_create], [timerfd_ok=yes], [timerfd_ok=]) 297 if test "x$timerfd_ok" = xyes; then 298 AC_DEFINE([HAVE_TIMERFD], [1], [Define to 1 if the system has timerfd functionality.]) 299 elif test "x$use_timerfd" = xyes; then 300 AC_MSG_ERROR([timerfd_create() function not found; glibc 2.9+ required]) 301 fi 302 elif test "x$use_timerfd" = xyes; then 303 AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required]) 304 fi 305 elif test "x$use_timerfd" = xyes; then 306 AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required]) 307 fi 308 fi 309 AC_MSG_CHECKING([whether to use timerfd for timing]) 310 if test "x$use_timerfd" = xno; then 311 AC_MSG_RESULT([no (disabled by user)]) 312 elif test "x$timerfd_h" != xyes; then 313 AC_MSG_RESULT([no (header not available)]) 314 elif test "x$timerfd_h_ok" != xyes; then 315 AC_MSG_RESULT([no (header not usable)]) 316 elif test "x$timerfd_ok" != xyes; then 317 AC_MSG_RESULT([no (functions not available)]) 318 else 319 AC_MSG_RESULT([yes]) 320 fi 321fi 322 323dnl Message logging 324AC_ARG_ENABLE([log], 325 [AS_HELP_STRING([--disable-log], [disable all logging])], 326 [log_enabled=$enableval], 327 [log_enabled=yes]) 328if test "x$log_enabled" != xno; then 329 AC_DEFINE([ENABLE_LOGGING], [1], [Define to 1 to enable message logging.]) 330fi 331 332AC_ARG_ENABLE([debug-log], 333 [AS_HELP_STRING([--enable-debug-log], [start with debug message logging enabled [default=no]])], 334 [debug_log_enabled=$enableval], 335 [debug_log_enabled=no]) 336if test "x$debug_log_enabled" != xno; then 337 AC_DEFINE([ENABLE_DEBUG_LOGGING], [1], [Define to 1 to start with debug message logging enabled.]) 338fi 339 340AC_ARG_ENABLE([system-log], 341 [AS_HELP_STRING([--enable-system-log], [output logging messages to the systemwide log, if supported by the OS [default=no]])], 342 [system_log_enabled=$enableval], 343 [system_log_enabled=no]) 344if test "x$system_log_enabled" != xno; then 345 AC_DEFINE([USE_SYSTEM_LOGGING_FACILITY], [1], [Define to 1 to output logging messages to the systemwide log.]) 346 if test "x$backend" != xwindows && test "x$is_android_linux" != xyes; then 347 dnl Check if syslog is available in standard C library 348 AC_CHECK_HEADER([syslog.h], [syslog_h=yes], [syslog_h=]) 349 if test "x$syslog_h" = xyes; then 350 AC_CHECK_FUNCS([syslog]) 351 fi 352 fi 353fi 354 355dnl Examples build 356AC_ARG_ENABLE([examples-build], 357 [AS_HELP_STRING([--enable-examples-build], [build example applications [default=no]])], 358 [build_examples=$enableval], 359 [build_examples=no]) 360 361dnl Tests build 362AC_ARG_ENABLE([tests-build], 363 [AS_HELP_STRING([--enable-tests-build], [build test applications [default=no]])], 364 [build_tests=$enableval], 365 [build_tests=no]) 366 367AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != xno]) 368AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno]) 369AM_CONDITIONAL([BUILD_UMOCKDEV_TEST], [test "x$ac_have_umockdev" = xyes -a "x$log_enabled" != xno]) 370AM_CONDITIONAL([CREATE_IMPORT_LIB], [test "x$create_import_lib" = xyes]) 371AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = xdarwin]) 372AM_CONDITIONAL([OS_HAIKU], [test "x$backend" = xhaiku]) 373AM_CONDITIONAL([OS_LINUX], [test "x$backend" = xlinux]) 374AM_CONDITIONAL([OS_NETBSD], [test "x$backend" = xnetbsd]) 375AM_CONDITIONAL([OS_NULL], [test "x$backend" = xnull]) 376AM_CONDITIONAL([OS_OPENBSD], [test "x$backend" = xopenbsd]) 377AM_CONDITIONAL([OS_SUNOS], [test "x$backend" = xsunos]) 378AM_CONDITIONAL([OS_WINDOWS], [test "x$backend" = xwindows]) 379AM_CONDITIONAL([PLATFORM_POSIX], [test "x$platform" = xposix]) 380AM_CONDITIONAL([PLATFORM_WINDOWS], [test "x$platform" = xwindows]) 381AM_CONDITIONAL([USE_UDEV], [test "x$use_udev" = xyes]) 382 383dnl The -Wcast-function-type warning causes a flurry of warnings when compiling 384dnl Windows with GCC 8 or later because of dynamically loaded functions 385if test "x$backend" = xwindows; then 386 saved_CFLAGS="${CFLAGS}" 387 CFLAGS="-Werror -Wcast-function-type" 388 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 389 [EXTRA_CFLAGS="${EXTRA_CFLAGS} -Wno-cast-function-type"], 390 []) 391 CFLAGS="${saved_CFLAGS}" 392fi 393 394SHARED_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" 395 396AM_CPPFLAGS="${EXTRA_CPPFLAGS}" 397AC_SUBST(AM_CPPFLAGS) 398 399AM_CFLAGS="-std=${c_dialect}11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS}" 400AC_SUBST(AM_CFLAGS) 401 402AM_CXXFLAGS="-std=${c_dialect}++11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS} -Wmissing-declarations" 403AC_SUBST(AM_CXXFLAGS) 404 405AC_SUBST(LT_LDFLAGS) 406 407AC_SUBST([EXTRA_LDFLAGS]) 408 409dnl set name of html output directory for doxygen 410AC_SUBST(DOXYGEN_HTMLDIR, [api-1.0]) 411 412AC_CONFIG_FILES([libusb-1.0.pc]) 413AC_CONFIG_FILES([Makefile]) 414AC_CONFIG_FILES([libusb/Makefile]) 415AC_CONFIG_FILES([examples/Makefile]) 416AC_CONFIG_FILES([tests/Makefile]) 417AC_CONFIG_FILES([doc/Makefile]) 418AC_CONFIG_FILES([doc/doxygen.cfg]) 419AC_OUTPUT 420