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], [[email protected]], [libusb-1.0], [https://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=4 35lt_revision=0 36lt_age=4 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 $host in 76*-darwin*) 77 AC_MSG_RESULT([Darwin/Mac OS X]) 78 backend=darwin 79 platform=posix 80 ;; 81*-haiku*) 82 AC_MSG_RESULT([Haiku]) 83 backend=haiku 84 platform=posix 85 ;; 86wasm*-emscripten) 87 AC_MSG_RESULT([Emscripten]) 88 backend=emscripten 89 platform=posix 90 ;; 91wasm*-unknown-none) 92 AC_MSG_ERROR([ 93--host=$host_alias is not accepted as it might become ambiguous in the future. 94Please use an explicit --host=$host_cpu-emscripten instead. 95 ]) 96 ;; 97*-linux* | *-uclinux*) 98 dnl on Android Linux, some functions are in different places 99 case $host in 100 *-linux-android*) 101 AC_MSG_RESULT([Android Linux]) 102 is_android_linux=yes 103 ;; 104 *) 105 AC_MSG_RESULT([Linux]) 106 ;; 107 esac 108 backend=linux 109 platform=posix 110 ;; 111*-netbsd*) 112 AC_MSG_RESULT([NetBSD]) 113 backend=netbsd 114 platform=posix 115 ;; 116*-openbsd*) 117 AC_MSG_RESULT([OpenBSD]) 118 backend=openbsd 119 platform=posix 120 ;; 121*-solaris*) 122 AC_MSG_RESULT([SunOS]) 123 backend=sunos 124 platform=posix 125 ;; 126*-cygwin*) 127 AC_MSG_RESULT([Windows (using Cygwin)]) 128 backend=windows 129 platform=windows 130 EXTRA_CFLAGS="-mwin32" 131 ;; 132*-mingw* | *msys*) 133 AC_MSG_RESULT([Windows]) 134 backend=windows 135 platform=windows 136 test "x$enable_shared" = xyes && create_import_lib=yes 137 EXTRA_CFLAGS="-fno-omit-frame-pointer" 138 EXTRA_LDFLAGS="-static-libgcc" 139 ;; 140*) 141 AC_MSG_RESULT([Null]) 142 AC_MSG_WARN([The host being compiled for is not supported.]) 143 AC_MSG_WARN([The library may compile but will not function in any useful manner.]) 144 backend=null 145 platform=posix 146 ;; 147esac 148 149if test "x$platform" = xposix; then 150 AC_DEFINE([PLATFORM_POSIX], [1], [Define to 1 if compiling for a POSIX platform.]) 151 AC_CHECK_TYPES([nfds_t], [], [], [[#include <poll.h>]]) 152 if test "x$backend" != xemscripten; then 153 # pipe2 is detected as present on Emscripten, but it isn't actually ported and always 154 # returns an error. https://github.com/emscripten-core/emscripten/issues/14824 155 AC_CHECK_FUNCS([pipe2]) 156 fi 157 dnl Some compilers do not support the '-pthread' option so check for it here 158 saved_CFLAGS="${CFLAGS}" 159 CFLAGS="-Wall -Werror -pthread" 160 AC_MSG_CHECKING([if $CC recognizes -pthread]) 161 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 162 [AC_MSG_RESULT([yes]) 163 AC_SUBST(THREAD_CFLAGS, [-pthread])], 164 [AC_MSG_RESULT([no])]) 165 CFLAGS="${saved_CFLAGS}" 166 dnl Android Linux and Darwin provide pthread functions directly in libc 167 dnl glibc also provides some pthread functions directly, so search for a thread-specific function 168 AC_SEARCH_LIBS([pthread_create], [pthread], 169 [test "x$ac_cv_search_pthread_create" != "xnone required" && AC_SUBST(THREAD_LIBS, [-lpthread])], 170 [], []) 171 dnl Check for new-style atomic builtins. We first check without linking to -latomic. 172 AC_MSG_CHECKING(whether __atomic_load_n is supported) 173 AC_LINK_IFELSE([AC_LANG_SOURCE([[ 174 #include <stdint.h> 175 int main() { 176 struct { 177 uint64_t *v; 178 } x; 179 return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) & 180 (int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL); 181 }]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes, GCC_ATOMIC_BUILTINS_SUPPORTED=no) 182 AC_MSG_RESULT($GCC_ATOMIC_BUILTINS_SUPPORTED) 183 if test "x$GCC_ATOMIC_BUILTINS_SUPPORTED" != xyes; then 184 AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic]) 185 fi 186elif test "x$platform" = xwindows; then 187 AC_DEFINE([PLATFORM_WINDOWS], [1], [Define to 1 if compiling for a Windows platform.]) 188else 189 AC_MSG_ERROR([Unknown platform]) 190fi 191 192case $backend in 193darwin) 194 AC_CHECK_FUNCS([pthread_threadid_np]) 195 LIBS="${LIBS} -lobjc -Wl,-framework,IOKit -Wl,-framework,CoreFoundation -Wl,-framework,Security" 196 AC_CHECK_HEADERS([IOKit/usb/IOUSBHostFamilyDefinitions.h]) 197 ;; 198haiku) 199 LIBS="${LIBS} -lbe" 200 ;; 201linux) 202 AC_SEARCH_LIBS([clock_gettime], [rt], [], [], []) 203 AC_CHECK_FUNCS([pthread_setname_np]) 204 AC_ARG_ENABLE([udev], 205 [AS_HELP_STRING([--enable-udev], [use udev for device enumeration and hotplug support (recommended) [default=yes]])], 206 [use_udev=$enableval], [use_udev=yes]) 207 if test "x$use_udev" = xyes; then 208 dnl system has udev. use it or fail! 209 AC_CHECK_HEADER([libudev.h], [], [AC_MSG_ERROR([udev support requested but libudev header not installed])]) 210 AC_CHECK_LIB([udev], [udev_new], [], [AC_MSG_ERROR([udev support requested but libudev not installed])]) 211 212 # We can build umockdev tests (if available) 213 m4_ifdef([PKG_PROG_PKG_CONFIG],[ 214 PKG_PROG_PKG_CONFIG 215 PKG_CHECK_MODULES([UMOCKDEV], [umockdev-1.0 >= 0.16.0], [ac_have_umockdev=yes], [ac_have_umockdev=no]) 216 PKG_CHECK_MODULES([UMOCKDEV_HOTPLUG], [umockdev-1.0 >= 0.17.7], [ac_umockdev_hotplug=yes], [ac_umockdev_hotplug=no]) 217 if test $ac_umockdev_hotplug = yes; then 218 AC_DEFINE([UMOCKDEV_HOTPLUG], [1], [UMockdev hotplug code is not racy]) 219 fi 220 ], []) 221 else 222 AC_CHECK_HEADERS([asm/types.h]) 223 AC_CHECK_HEADER([linux/netlink.h], [], [AC_MSG_ERROR([Linux netlink header not found])]) 224 AC_CHECK_HEADER([sys/socket.h], [], [AC_MSG_ERROR([Linux socket header not found])]) 225 fi 226 ;; 227sunos) 228 LIBS="${LIBS} -ldevinfo" 229 ;; 230windows) 231 AC_CHECK_TYPES([struct timespec], [], [], [[#include <time.h>]]) 232 AC_DEFINE([_WIN32_WINNT], [_WIN32_WINNT_VISTA], [Define to the oldest supported Windows version.]) 233 LT_LDFLAGS="${LT_LDFLAGS} -avoid-version" 234 ;; 235emscripten) 236 # Note: LT_LDFLAGS is not enough here because we need link flags for executable. 237 EM_LDFLAGS="--bind -s ASYNCIFY" 238 AM_LDFLAGS="${AM_LDFLAGS} ${EM_LDFLAGS} -s ASSERTIONS -s ALLOW_MEMORY_GROWTH" 239 LIBS="${LIBS} ${EM_LDFLAGS}" 240 ;; 241*) 242 dnl no special handling required 243 ;; 244esac 245 246dnl headers not available on all platforms but required on others 247AC_CHECK_HEADERS([sys/time.h]) 248 249dnl check availability of clock_gettime(), except don't bother on Darwin, because the result is not used. 250if test "x$platform" = xposix && test "x$backend" != xdarwin; then 251 AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [AC_MSG_ERROR([clock_gettime() is required on this platform])]) 252 253 if test "x$have_clock_gettime" = xyes; then 254 dnl the clock_gettime() function needs certain clock IDs defined 255 AC_CHECK_DECL([CLOCK_MONOTONIC], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_MONOTONIC])], [[#include <time.h>]]) 256 dnl use the monotonic clock for condition variable timed waits if possible 257 AC_CHECK_FUNCS([pthread_condattr_setclock], [need_clock_realtime=], [need_clock_realtime=yes]) 258 if test "x$need_clock_realtime" = xyes; then 259 AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]]) 260 fi 261 fi 262fi 263 264dnl eventfd support 265if test "x$backend" = xlinux || test "x$backend" = xsunos; then 266 AC_ARG_ENABLE([eventfd], 267 [AS_HELP_STRING([--enable-eventfd], [use eventfd for signalling [default=auto]])], 268 [use_eventfd=$enableval], 269 [use_eventfd=auto]) 270 if test "x$use_eventfd" != xno; then 271 AC_CHECK_HEADER([sys/eventfd.h], [eventfd_h=yes], [eventfd_h=]) 272 if test "x$eventfd_h" = xyes; then 273 AC_CHECK_DECLS([EFD_NONBLOCK, EFD_CLOEXEC], [eventfd_h_ok=yes], [eventfd_h_ok=], [[#include <sys/eventfd.h>]]) 274 if test "x$eventfd_h_ok" = xyes; then 275 AC_CHECK_FUNC([eventfd], [eventfd_ok=yes], [eventfd_ok=]) 276 if test "x$eventfd_ok" = xyes; then 277 AC_DEFINE([HAVE_EVENTFD], [1], [Define to 1 if the system has eventfd functionality.]) 278 elif test "x$use_eventfd" = xyes; then 279 AC_MSG_ERROR([eventfd() function not found; glibc 2.9+ required]) 280 fi 281 elif test "x$use_eventfd" = xyes; then 282 AC_MSG_ERROR([eventfd header not usable; glibc 2.9+ required]) 283 fi 284 elif test "x$use_eventfd" = xyes; then 285 AC_MSG_ERROR([eventfd header not available; glibc 2.9+ required]) 286 fi 287 fi 288 AC_MSG_CHECKING([whether to use eventfd for signalling]) 289 if test "x$use_eventfd" = xno; then 290 AC_MSG_RESULT([no (disabled by user)]) 291 elif test "x$eventfd_h" != xyes; then 292 AC_MSG_RESULT([no (header not available)]) 293 elif test "x$eventfd_h_ok" != xyes; then 294 AC_MSG_RESULT([no (header not usable)]) 295 elif test "x$eventfd_ok" != xyes; then 296 AC_MSG_RESULT([no (functions not available)]) 297 else 298 AC_MSG_RESULT([yes]) 299 fi 300fi 301 302dnl timerfd support 303if test "x$backend" = xlinux || test "x$backend" = xsunos; then 304 AC_ARG_ENABLE([timerfd], 305 [AS_HELP_STRING([--enable-timerfd], [use timerfd for timing [default=auto]])], 306 [use_timerfd=$enableval], 307 [use_timerfd=auto]) 308 if test "x$use_timerfd" != xno; then 309 AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=yes], [timerfd_h=]) 310 if test "x$timerfd_h" = xyes; then 311 AC_CHECK_DECLS([TFD_NONBLOCK, TFD_CLOEXEC], [timerfd_h_ok=yes], [timerfd_h_ok=], [[#include <sys/timerfd.h>]]) 312 if test "x$timerfd_h_ok" = xyes; then 313 AC_CHECK_FUNC([timerfd_create], [timerfd_ok=yes], [timerfd_ok=]) 314 if test "x$timerfd_ok" = xyes; then 315 AC_DEFINE([HAVE_TIMERFD], [1], [Define to 1 if the system has timerfd functionality.]) 316 elif test "x$use_timerfd" = xyes; then 317 AC_MSG_ERROR([timerfd_create() function not found; glibc 2.9+ required]) 318 fi 319 elif test "x$use_timerfd" = xyes; then 320 AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required]) 321 fi 322 elif test "x$use_timerfd" = xyes; then 323 AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required]) 324 fi 325 fi 326 AC_MSG_CHECKING([whether to use timerfd for timing]) 327 if test "x$use_timerfd" = xno; then 328 AC_MSG_RESULT([no (disabled by user)]) 329 elif test "x$timerfd_h" != xyes; then 330 AC_MSG_RESULT([no (header not available)]) 331 elif test "x$timerfd_h_ok" != xyes; then 332 AC_MSG_RESULT([no (header not usable)]) 333 elif test "x$timerfd_ok" != xyes; then 334 AC_MSG_RESULT([no (functions not available)]) 335 else 336 AC_MSG_RESULT([yes]) 337 fi 338fi 339 340dnl Message logging 341AC_ARG_ENABLE([log], 342 [AS_HELP_STRING([--disable-log], [disable all logging])], 343 [log_enabled=$enableval], 344 [log_enabled=yes]) 345if test "x$log_enabled" != xno; then 346 AC_DEFINE([ENABLE_LOGGING], [1], [Define to 1 to enable message logging.]) 347fi 348 349AC_ARG_ENABLE([debug-log], 350 [AS_HELP_STRING([--enable-debug-log], [start with debug message logging enabled [default=no]])], 351 [debug_log_enabled=$enableval], 352 [debug_log_enabled=no]) 353if test "x$debug_log_enabled" != xno; then 354 AC_DEFINE([ENABLE_DEBUG_LOGGING], [1], [Define to 1 to start with debug message logging enabled.]) 355fi 356 357AC_ARG_ENABLE([system-log], 358 [AS_HELP_STRING([--enable-system-log], [output logging messages to the systemwide log, if supported by the OS [default=no]])], 359 [system_log_enabled=$enableval], 360 [system_log_enabled=no]) 361if test "x$system_log_enabled" != xno; then 362 AC_DEFINE([USE_SYSTEM_LOGGING_FACILITY], [1], [Define to 1 to output logging messages to the systemwide log.]) 363 if test "x$backend" != xwindows && test "x$is_android_linux" != xyes; then 364 dnl Check if syslog is available in standard C library 365 AC_CHECK_HEADER([syslog.h], [syslog_h=yes], [syslog_h=]) 366 if test "x$syslog_h" = xyes; then 367 AC_CHECK_FUNCS([syslog]) 368 fi 369 fi 370fi 371 372dnl Examples build 373AC_ARG_ENABLE([examples-build], 374 [AS_HELP_STRING([--enable-examples-build], [build example applications [default=no]])], 375 [build_examples=$enableval], 376 [build_examples=no]) 377 378dnl Tests build 379AC_ARG_ENABLE([tests-build], 380 [AS_HELP_STRING([--enable-tests-build], [build test applications [default=no]])], 381 [build_tests=$enableval], 382 [build_tests=no]) 383 384AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != xno]) 385AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno]) 386AM_CONDITIONAL([BUILD_UMOCKDEV_TEST], [test "x$ac_have_umockdev" = xyes -a "x$log_enabled" != xno -a "x$debug_log_enabled" != xyes]) 387AM_CONDITIONAL([CREATE_IMPORT_LIB], [test "x$create_import_lib" = xyes]) 388AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = xdarwin]) 389AM_CONDITIONAL([OS_HAIKU], [test "x$backend" = xhaiku]) 390AM_CONDITIONAL([OS_LINUX], [test "x$backend" = xlinux]) 391AM_CONDITIONAL([OS_NETBSD], [test "x$backend" = xnetbsd]) 392AM_CONDITIONAL([OS_NULL], [test "x$backend" = xnull]) 393AM_CONDITIONAL([OS_OPENBSD], [test "x$backend" = xopenbsd]) 394AM_CONDITIONAL([OS_SUNOS], [test "x$backend" = xsunos]) 395AM_CONDITIONAL([OS_WINDOWS], [test "x$backend" = xwindows]) 396AM_CONDITIONAL([OS_EMSCRIPTEN], [test "x$backend" = xemscripten]) 397AM_CONDITIONAL([PLATFORM_POSIX], [test "x$platform" = xposix]) 398AM_CONDITIONAL([PLATFORM_WINDOWS], [test "x$platform" = xwindows]) 399AM_CONDITIONAL([USE_UDEV], [test "x$use_udev" = xyes]) 400 401dnl The -Wcast-function-type warning causes a flurry of warnings when compiling 402dnl Windows with GCC 8 or later because of dynamically loaded functions 403if test "x$backend" = xwindows; then 404 saved_CFLAGS="${CFLAGS}" 405 CFLAGS="-Werror -Wcast-function-type" 406 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 407 [EXTRA_CFLAGS="${EXTRA_CFLAGS} -Wno-cast-function-type"], 408 []) 409 CFLAGS="${saved_CFLAGS}" 410fi 411 412dnl Some linkers do not support the '--add-stdcall-alias' option so check for it here 413if test "x$backend" = xwindows; then 414 saved_CFLAGS="${CFLAGS}" 415 CFLAGS="-Wl,--add-stdcall-alias" 416 AC_MSG_CHECKING([if linker supports --add-stdcall-alias]) 417 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], 418 [AC_MSG_RESULT([yes]) 419 LT_LDFLAGS="${LT_LDFLAGS} -Wl,--add-stdcall-alias"], 420 [AC_MSG_RESULT([no])]) 421 CFLAGS="${saved_CFLAGS}" 422fi 423 424SHARED_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" 425 426AM_CPPFLAGS="${EXTRA_CPPFLAGS}" 427AC_SUBST(AM_CPPFLAGS) 428 429AM_CFLAGS="-std=${c_dialect}11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS}" 430AC_SUBST(AM_CFLAGS) 431 432AM_CXXFLAGS="-std=${c_dialect}++11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS} -Wmissing-declarations" 433AC_SUBST(AM_CXXFLAGS) 434 435AC_SUBST(LT_LDFLAGS) 436AC_SUBST(AM_LDFLAGS) 437 438AC_SUBST([EXTRA_LDFLAGS]) 439 440dnl set name of html output directory for doxygen 441AC_SUBST(DOXYGEN_HTMLDIR, [api-1.0]) 442 443AC_CONFIG_FILES([libusb-1.0.pc]) 444AC_CONFIG_FILES([Makefile]) 445AC_CONFIG_FILES([libusb/Makefile]) 446AC_CONFIG_FILES([examples/Makefile]) 447AC_CONFIG_FILES([tests/Makefile]) 448AC_CONFIG_FILES([doc/Makefile]) 449AC_CONFIG_FILES([doc/doxygen.cfg]) 450AC_OUTPUT 451