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 ;; 128*) 129 AC_MSG_RESULT([Null]) 130 AC_MSG_WARN([The host being compiled for is not supported.]) 131 AC_MSG_WARN([The library may compile but will not function in any useful manner.]) 132 backend=null 133 platform=posix 134 ;; 135esac 136 137if test "x$platform" = xposix; then 138 AC_DEFINE([PLATFORM_POSIX], [1], [Define to 1 if compiling for a POSIX platform.]) 139 AC_CHECK_TYPES([nfds_t], [], [], [[#include <poll.h>]]) 140 AC_CHECK_FUNCS([pipe2]) 141 dnl Some compilers do not support the '-pthread' option so check for it here 142 saved_CFLAGS="${CFLAGS}" 143 CFLAGS="-Wall -Werror -pthread" 144 AC_MSG_CHECKING([if $CC recognizes -pthread]) 145 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 146 [AC_MSG_RESULT([yes]) 147 AC_SUBST(THREAD_CFLAGS, [-pthread])], 148 [AC_MSG_RESULT([no])]) 149 CFLAGS="${saved_CFLAGS}" 150 dnl Android Linux and Darwin provide pthread functions directly in libc 151 dnl glibc also provides some pthread functions directly, so search for a thread-specific function 152 AC_SEARCH_LIBS([pthread_create], [pthread], 153 [test "x$ac_cv_search_pthread_create" != "xnone required" && AC_SUBST(THREAD_LIBS, [-lpthread])], 154 [], []) 155elif test "x$platform" = xwindows; then 156 AC_DEFINE([PLATFORM_WINDOWS], [1], [Define to 1 if compiling for a Windows platform.]) 157else 158 AC_MSG_ERROR([Unknown platform]) 159fi 160 161case $backend in 162darwin) 163 AC_CHECK_FUNCS([pthread_threadid_np]) 164 LIBS="${LIBS} -lobjc -Wl,-framework,IOKit -Wl,-framework,CoreFoundation" 165 ;; 166haiku) 167 LIBS="${LIBS} -lbe" 168 ;; 169linux) 170 AC_SEARCH_LIBS([clock_gettime], [rt], [], [], []) 171 AC_CHECK_FUNCS([pthread_setname_np]) 172 AC_ARG_ENABLE([udev], 173 [AC_HELP_STRING([--enable-udev], [use udev for device enumeration and hotplug support (recommended) [default=yes]])], 174 [use_udev=$enableval], [use_udev=yes]) 175 if test "x$use_udev" = xyes; then 176 dnl system has udev. use it or fail! 177 AC_CHECK_HEADER([libudev.h], [], [AC_MSG_ERROR([udev support requested but libudev header not installed])]) 178 AC_CHECK_LIB([udev], [udev_new], [], [AC_MSG_ERROR([udev support requested but libudev not installed])]) 179 else 180 AC_CHECK_HEADERS([asm/types.h]) 181 AC_CHECK_HEADER([linux/netlink.h], [], [AC_MSG_ERROR([Linux netlink header not found])]) 182 AC_CHECK_HEADER([sys/socket.h], [], [AC_MSG_ERROR([Linux socket header not found])]) 183 fi 184 ;; 185sunos) 186 LIBS="${LIBS} -ldevinfo" 187 ;; 188windows) 189 AC_CHECK_TYPES([struct timespec], [], [], [[#include <time.h>]]) 190 AC_DEFINE([_WIN32_WINNT], [_WIN32_WINNT_VISTA], [Define to the oldest supported Windows version.]) 191 LT_LDFLAGS="${LT_LDFLAGS} -avoid-version -Wl,--add-stdcall-alias" 192 ;; 193*) 194 dnl no special handling required 195 ;; 196esac 197 198dnl headers not available on all platforms but required on others 199AC_CHECK_HEADERS([sys/time.h]) 200 201if test "x$platform" = xposix; then 202 dnl the clock_gettime() function needs certain clock IDs defined 203 AC_CHECK_FUNCS([clock_gettime], [have_clock_gettime=yes], [have_clock_gettime=]) 204 if test "x$have_clock_gettime" = xyes; then 205 AC_CHECK_DECL([CLOCK_MONOTONIC], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_MONOTONIC])], [[#include <time.h>]]) 206 dnl use the monotonic clock for condition variable timed waits if possible 207 AC_CHECK_FUNCS([pthread_condattr_setclock], [need_clock_realtime=], [need_clock_realtime=yes]) 208 if test "x$need_clock_realtime" = xyes; then 209 AC_CHECK_DECL([CLOCK_REALTIME], [], [AC_MSG_ERROR([C library headers missing definition for CLOCK_REALTIME])], [[#include <time.h>]]) 210 fi 211 elif test "x$backend" != xdarwin; then 212 AC_MSG_ERROR([clock_gettime() is required on this platform]) 213 fi 214fi 215 216dnl eventfd support 217if test "x$backend" = xlinux || test "x$backend" = xsunos; then 218 AC_ARG_ENABLE([eventfd], 219 [AS_HELP_STRING([--enable-eventfd], [use eventfd for signalling [default=auto]])], 220 [use_eventfd=$enableval], 221 [use_eventfd=auto]) 222 if test "x$use_eventfd" != xno; then 223 AC_CHECK_HEADER([sys/eventfd.h], [eventfd_h=yes], [eventfd_h=]) 224 if test "x$eventfd_h" = xyes; then 225 AC_CHECK_DECLS([EFD_NONBLOCK, EFD_CLOEXEC], [eventfd_h_ok=yes], [eventfd_h_ok=], [[#include <sys/eventfd.h>]]) 226 if test "x$eventfd_h_ok" = xyes; then 227 AC_CHECK_FUNC([eventfd], [eventfd_ok=yes], [eventfd_ok=]) 228 if test "x$eventfd_ok" = xyes; then 229 AC_DEFINE([HAVE_EVENTFD], [1], [Define to 1 if the system has eventfd functionality.]) 230 elif test "x$use_eventfd" = xyes; then 231 AC_MSG_ERROR([eventfd() function not found; glibc 2.9+ required]) 232 fi 233 elif test "x$use_eventfd" = xyes; then 234 AC_MSG_ERROR([eventfd header not usable; glibc 2.9+ required]) 235 fi 236 elif test "x$use_eventfd" = xyes; then 237 AC_MSG_ERROR([eventfd header not available; glibc 2.9+ required]) 238 fi 239 fi 240 AC_MSG_CHECKING([whether to use eventfd for signalling]) 241 if test "x$use_eventfd" = xno; then 242 AC_MSG_RESULT([no (disabled by user)]) 243 elif test "x$eventfd_h" != xyes; then 244 AC_MSG_RESULT([no (header not available)]) 245 elif test "x$eventfd_h_ok" != xyes; then 246 AC_MSG_RESULT([no (header not usable)]) 247 elif test "x$eventfd_ok" != xyes; then 248 AC_MSG_RESULT([no (functions not available)]) 249 else 250 AC_MSG_RESULT([yes]) 251 fi 252fi 253 254dnl timerfd support 255if test "x$backend" = xlinux || test "x$backend" = xsunos; then 256 AC_ARG_ENABLE([timerfd], 257 [AS_HELP_STRING([--enable-timerfd], [use timerfd for timing [default=auto]])], 258 [use_timerfd=$enableval], 259 [use_timerfd=auto]) 260 if test "x$use_timerfd" != xno; then 261 AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=yes], [timerfd_h=]) 262 if test "x$timerfd_h" = xyes; then 263 AC_CHECK_DECLS([TFD_NONBLOCK, TFD_CLOEXEC], [timerfd_h_ok=yes], [timerfd_h_ok=], [[#include <sys/timerfd.h>]]) 264 if test "x$timerfd_h_ok" = xyes; then 265 AC_CHECK_FUNC([timerfd_create], [timerfd_ok=yes], [timerfd_ok=]) 266 if test "x$timerfd_ok" = xyes; then 267 AC_DEFINE([HAVE_TIMERFD], [1], [Define to 1 if the system has timerfd functionality.]) 268 elif test "x$use_timerfd" = xyes; then 269 AC_MSG_ERROR([timerfd_create() function not found; glibc 2.9+ required]) 270 fi 271 elif test "x$use_timerfd" = xyes; then 272 AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required]) 273 fi 274 elif test "x$use_timerfd" = xyes; then 275 AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required]) 276 fi 277 fi 278 AC_MSG_CHECKING([whether to use timerfd for timing]) 279 if test "x$use_timerfd" = xno; then 280 AC_MSG_RESULT([no (disabled by user)]) 281 elif test "x$timerfd_h" != xyes; then 282 AC_MSG_RESULT([no (header not available)]) 283 elif test "x$timerfd_h_ok" != xyes; then 284 AC_MSG_RESULT([no (header not usable)]) 285 elif test "x$timerfd_ok" != xyes; then 286 AC_MSG_RESULT([no (functions not available)]) 287 else 288 AC_MSG_RESULT([yes]) 289 fi 290fi 291 292dnl Message logging 293AC_ARG_ENABLE([log], 294 [AS_HELP_STRING([--disable-log], [disable all logging])], 295 [log_enabled=$enableval], 296 [log_enabled=yes]) 297if test "x$log_enabled" != xno; then 298 AC_DEFINE([ENABLE_LOGGING], [1], [Define to 1 to enable message logging.]) 299fi 300 301AC_ARG_ENABLE([debug-log], 302 [AS_HELP_STRING([--enable-debug-log], [start with debug message logging enabled [default=no]])], 303 [debug_log_enabled=$enableval], 304 [debug_log_enabled=no]) 305if test "x$debug_log_enabled" != xno; then 306 AC_DEFINE([ENABLE_DEBUG_LOGGING], [1], [Define to 1 to start with debug message logging enabled.]) 307fi 308 309AC_ARG_ENABLE([system-log], 310 [AS_HELP_STRING([--enable-system-log], [output logging messages to the systemwide log, if supported by the OS [default=no]])], 311 [system_log_enabled=$enableval], 312 [system_log_enabled=no]) 313if test "x$system_log_enabled" != xno; then 314 AC_DEFINE([USE_SYSTEM_LOGGING_FACILITY], [1], [Define to 1 to output logging messages to the systemwide log.]) 315 if test "x$backend" != xwindows && test "x$is_android_linux" != xyes; then 316 dnl Check if syslog is available in standard C library 317 AC_CHECK_HEADER([syslog.h], [syslog_h=yes], [syslog_h=]) 318 if test "x$syslog_h" = xyes; then 319 AC_CHECK_FUNCS([syslog]) 320 fi 321 fi 322fi 323 324dnl Examples build 325AC_ARG_ENABLE([examples-build], 326 [AS_HELP_STRING([--enable-examples-build], [build example applications [default=no]])], 327 [build_examples=$enableval], 328 [build_examples=no]) 329 330dnl Tests build 331AC_ARG_ENABLE([tests-build], 332 [AS_HELP_STRING([--enable-tests-build], [build test applications [default=no]])], 333 [build_tests=$enableval], 334 [build_tests=no]) 335 336AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != xno]) 337AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno]) 338AM_CONDITIONAL([CREATE_IMPORT_LIB], [test "x$create_import_lib" = xyes]) 339AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = xdarwin]) 340AM_CONDITIONAL([OS_HAIKU], [test "x$backend" = xhaiku]) 341AM_CONDITIONAL([OS_LINUX], [test "x$backend" = xlinux]) 342AM_CONDITIONAL([OS_NETBSD], [test "x$backend" = xnetbsd]) 343AM_CONDITIONAL([OS_NULL], [test "x$backend" = xnull]) 344AM_CONDITIONAL([OS_OPENBSD], [test "x$backend" = xopenbsd]) 345AM_CONDITIONAL([OS_SUNOS], [test "x$backend" = xsunos]) 346AM_CONDITIONAL([OS_WINDOWS], [test "x$backend" = xwindows]) 347AM_CONDITIONAL([PLATFORM_POSIX], [test "x$platform" = xposix]) 348AM_CONDITIONAL([PLATFORM_WINDOWS], [test "x$platform" = xwindows]) 349AM_CONDITIONAL([USE_UDEV], [test "x$use_udev" = xyes]) 350 351dnl The -Wcast-function-type warning causes a flurry of warnings when compiling 352dnl Windows with GCC 8 or later because of dynamically loaded functions 353if test "x$backend" = xwindows; then 354 saved_CFLAGS="${CFLAGS}" 355 CFLAGS="-Werror -Wcast-function-type" 356 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], 357 [EXTRA_CFLAGS="${EXTRA_CFLAGS} -Wno-cast-function-type"], 358 []) 359 CFLAGS="${saved_CFLAGS}" 360fi 361 362SHARED_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" 363 364AM_CPPFLAGS="${EXTRA_CPPFLAGS}" 365AC_SUBST(AM_CPPFLAGS) 366 367AM_CFLAGS="-std=${c_dialect}11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS}" 368AC_SUBST(AM_CFLAGS) 369 370AM_CXXFLAGS="-std=${c_dialect}++11 ${EXTRA_CFLAGS} ${SHARED_CFLAGS} -Wmissing-declarations" 371AC_SUBST(AM_CXXFLAGS) 372 373AC_SUBST(LT_LDFLAGS) 374 375dnl set name of html output directory for doxygen 376AC_SUBST(DOXYGEN_HTMLDIR, [api-1.0]) 377 378AC_CONFIG_FILES([libusb-1.0.pc]) 379AC_CONFIG_FILES([Makefile]) 380AC_CONFIG_FILES([libusb/Makefile]) 381AC_CONFIG_FILES([examples/Makefile]) 382AC_CONFIG_FILES([tests/Makefile]) 383AC_CONFIG_FILES([doc/Makefile]) 384AC_CONFIG_FILES([doc/doxygen.cfg]) 385AC_OUTPUT 386