AC_PREREQ(2.52) m4_include([version.m4]) m4_include([m4/c99-backport.m4]) AC_INIT([memcached], [VERSION_NUMBER], [memcached@googlegroups.com]) AC_CANONICAL_HOST AC_CONFIG_SRCDIR([memcached.c]) AM_INIT_AUTOMAKE([foreign]) AM_CONFIG_HEADER([config.h]) AC_PROG_CC is_darwin=no case "${host_os}" in darwin*) is_darwin=yes ;; esac AM_CONDITIONAL([DARWIN], [test "$is_darwin" = "yes"]) dnl ********************************************************************** dnl DETECT_ICC ([ACTION-IF-YES], [ACTION-IF-NO]) dnl dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES dnl sets the $ICC variable to "yes" or "no" dnl ********************************************************************** AC_DEFUN([DETECT_ICC], [ ICC="no" AC_MSG_CHECKING([for icc in use]) if test "$GCC" = "yes"; then dnl check if this is icc acting as gcc in disguise AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER], AC_MSG_RESULT([no]) [$2], AC_MSG_RESULT([yes]) [$1] ICC="yes") else AC_MSG_RESULT([no]) [$2] fi ]) DETECT_ICC([], []) dnl ********************************************************************** dnl DETECT_CLANG ([ACTION-IF-YES], [ACTION-IF-NO]) dnl dnl check if compiler is clang, and if so run the ACTION-IF-YES sets the dnl $CLANG variable to "yes" or "no" dnl ********************************************************************** AC_DEFUN([DETECT_CLANG], [ AC_MSG_CHECKING([for clang in use]) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([], [[ #ifndef __clang__ not clang #endif ]])], [CLANG=yes], [CLANG=no]) AC_MSG_RESULT([$CLANG]) AS_IF([test "$CLANG" = "yes"],[$1],[$2]) ]) DETECT_CLANG([],[]) dnl ********************************************************************** dnl DETECT_SUNCC ([ACTION-IF-YES], [ACTION-IF-NO]) dnl dnl check if this is the Sun Studio compiler, and if so run the ACTION-IF-YES dnl sets the $SUNCC variable to "yes" or "no" dnl ********************************************************************** AC_DEFUN([DETECT_SUNCC], [ AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"]) AS_IF(test "x$SUNCC" = "xyes", [$1], [$2]) ]) DETECT_SUNCC([CFLAGS="-mt $CFLAGS"], []) AS_IF([test "$ICC" = "yes" -o "$GCC" = "yes"], [ AS_IF(test "$CLANG" = "no",[CFLAGS="$CFLAGS -pthread"]) ]) dnl clang will error .arch_extension crc32 assembler directives to allow dnl assembling crc instructions without this AS_IF(test "$CLANG" = "yes",[CFLAGS="$CFLAGS -Wno-language-extension-token"]) if test "$ICC" = "no"; then AC_PROG_CC_C99 fi AM_PROG_CC_C_O AC_PROG_INSTALL AC_ARG_ENABLE(extstore, [AS_HELP_STRING([--disable-extstore], [Disable external storage (extstore)])]) AC_ARG_ENABLE(seccomp, [AS_HELP_STRING([--enable-seccomp],[Enable seccomp restrictions EXPERIMENTAL])]) AC_ARG_ENABLE(sasl, [AS_HELP_STRING([--enable-sasl],[Enable SASL authentication])]) AC_ARG_ENABLE(sasl_pwdb, [AS_HELP_STRING([--enable-sasl-pwdb],[Enable plaintext password db])]) AS_IF([test "x$enable_sasl_pwdb" = "xyes"], [enable_sasl=yes ]) AC_ARG_ENABLE(tls, [AS_HELP_STRING([--enable-tls], [Enable Transport Layer Security EXPERIMENTAL ])]) AC_ARG_ENABLE(asan, [AS_HELP_STRING([--enable-asan], [Compile with ASAN EXPERIMENTAL ])]) AC_ARG_ENABLE(static, [AS_HELP_STRING([--enable-static], [Compile a statically linked binary])]) AC_ARG_ENABLE(unix_socket, [AS_HELP_STRING([--disable-unix-socket], [Disable unix domain socket])]) AC_ARG_ENABLE(proxy, [AS_HELP_STRING([--enable-proxy], [Enable proxy code EXPERIMENTAL])]) AC_ARG_ENABLE(proxy-uring, [AS_HELP_STRING([--enable-proxy-uring], [Enable proxy io_uring code EXPERIMENTAL])]) AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror], [Enable -Werror])]) dnl ********************************************************************** dnl DETECT_SASL_CB_GETCONF dnl dnl check if we can use SASL_CB_GETCONF dnl ********************************************************************** AC_DEFUN([AC_C_DETECT_SASL_CB_GETCONF], [ AC_CACHE_CHECK([for SASL_CB_GETCONF], [ac_cv_c_sasl_cb_getconf], [AC_TRY_COMPILE( [ #include ], [ unsigned long val = SASL_CB_GETCONF; ], [ ac_cv_c_sasl_cb_getconf=yes ], [ ac_cv_c_sasl_cb_getconf=no ]) ]) AS_IF([test "$ac_cv_c_sasl_cb_getconf" = "yes"], [AC_DEFINE([HAVE_SASL_CB_GETCONF], 1, [Set to nonzero if your SASL implementation supports SASL_CB_GETCONF])]) ]) dnl ********************************************************************** dnl DETECT_SASL_CB_GETCONFPATH dnl dnl check if we can use SASL_CB_GETCONFPATH dnl ********************************************************************** AC_DEFUN([AC_C_DETECT_SASL_CB_GETCONFPATH], [ AC_CACHE_CHECK([for SASL_CB_GETCONFPATH], [ac_cv_c_sasl_cb_getconfpath], [AC_TRY_COMPILE( [ #include ], [ unsigned long val = SASL_CB_GETCONFPATH; ], [ ac_cv_c_sasl_cb_getconfpath=yes ], [ ac_cv_c_sasl_cb_getconfpath=no ]) ]) AS_IF([test "$ac_cv_c_sasl_cb_getconfpath" = "yes"], [AC_DEFINE([HAVE_SASL_CB_GETCONFPATH], 1, [Set to nonzero if your SASL implementation supports SASL_CB_GETCONFPATH])]) ]) AC_CHECK_HEADERS([sasl/sasl.h]) if test "x$enable_sasl" = "xyes"; then AC_C_DETECT_SASL_CB_GETCONF AC_C_DETECT_SASL_CB_GETCONFPATH AC_DEFINE([ENABLE_SASL],1,[Set to nonzero if you want to include SASL]) AC_SEARCH_LIBS([sasl_server_init], [sasl2 sasl], [], [ AC_MSG_ERROR([Failed to locate the library containing sasl_server_init]) ]) AS_IF([test "x$enable_sasl_pwdb" = "xyes"], [AC_DEFINE([ENABLE_SASL_PWDB], 1, [Set to nonzero if you want to enable a SASL pwdb])]) fi AC_ARG_ENABLE(dtrace, [AS_HELP_STRING([--enable-dtrace],[Enable dtrace probes])]) if test "x$enable_dtrace" = "xyes"; then AC_PATH_PROG([DTRACE], [dtrace], "no", [/usr/sbin:$PATH]) if test "x$DTRACE" != "xno"; then AC_DEFINE([ENABLE_DTRACE],1,[Set to nonzero if you want to include DTRACE]) build_dtrace=yes $DTRACE -h -o conftest.h -s memcached_dtrace.d 2>/dev/zero if test $? -eq 0 then dtrace_instrument_obj=yes rm conftest.h # on Mac probe id are generated with $ if test "$is_darwin" = "yes"; then CFLAGS="$CFLAGS -Wno-dollar-in-identifier-extension" fi fi if test "`which tr`" = "/usr/ucb/tr"; then AC_MSG_ERROR([Please remove /usr/ucb from your path. See man standards for more info]) fi else AC_MSG_ERROR([Need dtrace binary and OS support.]) fi fi if test "x$enable_extstore" != "xno"; then AC_DEFINE([EXTSTORE],1,[Set to nonzero if you want to enable extstore]) fi if test "x$enable_tls" = "xyes"; then AC_DEFINE([TLS],1,[Set to nonzero if you want to enable TLS]) fi if test "x$enable_asan" = "xyes"; then AC_DEFINE([ASAN],1,[Set to nonzero if you want to compile using ASAN]) fi if test "x$enable_static" = "xyes"; then AC_DEFINE([STATIC],1,[Set to nonzero if you want to compile a statically linked binary]) fi if test "x$enable_unix_socket" = "xno"; then AC_DEFINE([DISABLE_UNIX_SOCKET],1,[Set to nonzero if you want to disable unix domain socket]) fi if test "x$enable_proxy" = "xyes"; then AC_DEFINE([PROXY],1,[Set to nonzero if you want to enable proxy code]) CPPFLAGS="-Ivendor/lua/src -Ivendor/liburing/src/include $CPPFLAGS" dnl lua needs math lib. LIBS="$LIBS -lm -ldl" fi if test "x$enable_proxy_uring" = "xyes"; then AC_DEFINE([HAVE_LIBURING],1,[Set to nonzero if you want to enable proxy uring handling]) CPPFLAGS="-Ivendor/liburing/src/include $CPPFLAGS" fi AM_CONDITIONAL([BUILD_DTRACE],[test "$build_dtrace" = "yes"]) AM_CONDITIONAL([DTRACE_INSTRUMENT_OBJ],[test "$dtrace_instrument_obj" = "yes"]) AM_CONDITIONAL([ENABLE_SASL],[test "$enable_sasl" = "yes"]) AM_CONDITIONAL([ENABLE_EXTSTORE],[test "$enable_extstore" != "no"]) AM_CONDITIONAL([ENABLE_ARM_CRC32],[test "$enable_arm_crc32" = "yes"]) AM_CONDITIONAL([ENABLE_TLS],[test "$enable_tls" = "yes"]) AM_CONDITIONAL([ENABLE_ASAN],[test "$enable_asan" = "yes"]) AM_CONDITIONAL([ENABLE_STATIC],[test "$enable_static" = "yes"]) AM_CONDITIONAL([DISABLE_UNIX_SOCKET],[test "$enable_unix_socket" = "no"]) AM_CONDITIONAL([ENABLE_PROXY],[test "$enable_proxy" = "yes"]) AM_CONDITIONAL([ENABLE_PROXY_URING],[test "$enable_proxy_uring" = "yes"]) AC_SUBST(DTRACE) AC_SUBST(DTRACEFLAGS) AC_SUBST(ENABLE_SASL) AC_SUBST(PROFILER_LDFLAGS) AC_ARG_ENABLE(coverage, [AS_HELP_STRING([--disable-coverage],[Disable code coverage])]) if test "x$enable_coverage" != "xno"; then if test "$GCC" = "yes" -a "$ICC" != "yes" -a "$CLANG" != "yes" then CFLAGS="$CFLAGS -pthread" AC_PATH_PROG([PROFILER], [gcov], "no", [$PATH]) if test "x$PROFILER" != "xno"; then # Issue 97: The existence of gcov doesn't mean we have -lgcov AC_CHECK_LIB(gcov, main, [ PROFILER_FLAGS="-fprofile-arcs -ftest-coverage" PROFILER_LDFLAGS="-lgcov" ], [ PROFILER_FLAGS= PROFILER_LDFLAGS= ]) fi elif test "$SUNCC" = "yes" then AC_PATH_PROG([PROFILER], [tcov], "no", [$PATH]) if test "x$PROFILER" != "xno"; then PROFILER_FLAGS=-xprofile=tcov fi elif test "x$CLANG" != "xno" then AC_PATH_PROG([PROFILER], [gcov], "no", [$PATH]) if test "x$PROFILER" != "xno" then PROFILER_FLAGS="-fprofile-arcs -ftest-coverage" PROFILER_LDFLAGS= fi fi fi AC_SUBST(PROFILER_FLAGS) AC_ARG_ENABLE(64bit, [AS_HELP_STRING([--enable-64bit],[build 64bit version])]) if test "x$enable_64bit" = "xyes" then org_cflags=$CFLAGS CFLAGS=-m64 AC_RUN_IFELSE( [AC_LANG_PROGRAM([], [dnl return sizeof(void*) == 8 ? 0 : 1; ]) ],[ CFLAGS="-m64 $org_cflags" ],[ AC_MSG_ERROR([Don't know how to build a 64-bit object.]) ],[ dnl cross compile AC_MSG_WARN([Assuming no extra CFLAGS are required for cross-compiling 64bit version.]) ]) fi dnl Check if data pointer is 64bit or not AC_CHECK_SIZEOF([void *]) # Issue 213: Search for clock_gettime to help people linking # with a static version of libevent AC_SEARCH_LIBS(clock_gettime, rt) # Issue 214: Search for the network libraries _before_ searching # for libevent (to help people linking with static libevent) AC_SEARCH_LIBS(socket, socket) AC_SEARCH_LIBS(gethostbyname, nsl) trylibeventdir="" AC_ARG_WITH(libevent, [ --with-libevent=PATH Specify path to libevent installation ], [ if test "x$withval" != "xno" ; then trylibeventdir=$withval fi ] ) dnl ------------------------------------------------------ dnl libevent detection. swiped from Tor. modified a bit. LIBEVENT_URL=https://www.monkey.org/~provos/libevent/ AC_CACHE_CHECK([for libevent directory], ac_cv_libevent_dir, [ saved_LIBS="$LIBS" saved_LDFLAGS="$LDFLAGS" saved_CPPFLAGS="$CPPFLAGS" le_found=no for ledir in $trylibeventdir "" $prefix /usr/local ; do LDFLAGS="$saved_LDFLAGS" LIBS="-levent $saved_LIBS" # Skip the directory if it isn't there. if test ! -z "$ledir" -a ! -d "$ledir" ; then continue; fi if test ! -z "$ledir" ; then if test -d "$ledir/lib" ; then LDFLAGS="-L$ledir/lib $LDFLAGS" else LDFLAGS="-L$ledir $LDFLAGS" fi if test -d "$ledir/include" ; then CPPFLAGS="-I$ledir/include $CPPFLAGS" else CPPFLAGS="-I$ledir $CPPFLAGS" fi fi # Can I compile and link it? AC_TRY_LINK([#include #include #include ], [ event_init(); ], [ libevent_linked=yes ], [ libevent_linked=no ]) if test $libevent_linked = yes; then if test ! -z "$ledir" ; then ac_cv_libevent_dir=$ledir _myos=`echo $target_os | cut -f 1 -d .` AS_IF(test "$SUNCC" = "yes" -o "x$_myos" = "xsolaris2", [saved_LDFLAGS="$saved_LDFLAGS -Wl,-R$ledir/lib"], [AS_IF(test "$GCC" = "yes", [saved_LDFLAGS="$saved_LDFLAGS -Wl,-rpath,$ledir/lib"])]) else ac_cv_libevent_dir="(system)" fi le_found=yes break fi done LIBS="$saved_LIBS" LDFLAGS="$saved_LDFLAGS" CPPFLAGS="$saved_CPPFLAGS" if test $le_found = no ; then AC_MSG_ERROR([libevent is required. You can get it from $LIBEVENT_URL If it's already installed, specify its path using --with-libevent=/dir/ ]) fi ]) LIBS="-levent $LIBS" if test $ac_cv_libevent_dir != "(system)"; then if test -d "$ac_cv_libevent_dir/lib" ; then LDFLAGS="-L$ac_cv_libevent_dir/lib $LDFLAGS" le_libdir="$ac_cv_libevent_dir/lib" else LDFLAGS="-L$ac_cv_libevent_dir $LDFLAGS" le_libdir="$ac_cv_libevent_dir" fi if test -d "$ac_cv_libevent_dir/include" ; then CPPFLAGS="-I$ac_cv_libevent_dir/include $CPPFLAGS" else CPPFLAGS="-I$ac_cv_libevent_dir $CPPFLAGS" fi fi AC_RUN_IFELSE( [AC_LANG_PROGRAM([ #include ], [dnl const char *ver = event_get_version(); return (ver != NULL && *ver != '1') ? 0 : 1; ]) ],[ AC_DEFINE(HAVE_LIBEVENT_NEW, 1, [linked to libevent]) ], [ AC_MSG_ERROR([libevent2 is required]) ], [] []) trylibssldir="" AC_ARG_WITH(libssl, [ --with-libssl=PATH Specify path to libssl installation ], [ if test "x$withval" != "xno" ; then trylibssldir=$withval fi ] ) dnl ---------------------------------------------------------------------------- dnl libssl detection. swiped from libevent. modified for openssl detection. PKG_PROG_PKG_CONFIG OPENSSL_URL=https://www.openssl.org/ if test "x$enable_tls" = "xyes"; then PKG_CHECK_MODULES(OPENSSL, openssl, [LIBS="$LIBS $OPENSSL_LIBS" CFLAGS="$CFLAGS $OPENSSL_CFLAGS"], [ AC_CACHE_CHECK([for libssl directory], ac_cv_libssl_dir, [ saved_LIBS="$LIBS" saved_LDFLAGS="$LDFLAGS" saved_CPPFLAGS="$CPPFLAGS" le_found=no for ledir in $trylibssldir "" $prefix /usr/local ; do LDFLAGS="$saved_LDFLAGS" LIBS="-lssl -lcrypto $saved_LIBS" # Skip the directory if it isn't there. if test ! -z "$ledir" -a ! -d "$ledir" ; then continue; fi if test ! -z "$ledir" ; then if test -d "$ledir/lib" ; then LDFLAGS="-L$ledir/lib $LDFLAGS" else LDFLAGS="-L$ledir $LDFLAGS" fi if test -d "$ledir/include" ; then CPPFLAGS="-I$ledir/include $CPPFLAGS" else CPPFLAGS="-I$ledir $CPPFLAGS" fi fi # Can I compile and link it? AC_TRY_LINK([#include #include #include #include ], [ SSL_CTX* ssl_ctx = SSL_CTX_new(TLS_server_method()); assert(OPENSSL_VERSION_NUMBER >= 0x10100000L);], [ libssl_linked=yes ], [ libssl_linked=no ]) if test $libssl_linked = yes; then if test ! -z "$ledir" ; then ac_cv_libssl_dir=$ledir _myos=`echo $target_os | cut -f 1 -d .` AS_IF(test "$SUNCC" = "yes" -o "x$_myos" = "xsolaris2", [saved_LDFLAGS="$saved_LDFLAGS -Wl,-R$ledir/lib"], [AS_IF(test "$GCC" = "yes", [saved_LDFLAGS="$saved_LDFLAGS -Wl,-rpath,$ledir/lib"])]) else ac_cv_libssl_dir="(system)" fi le_found=yes break fi done LIBS="$saved_LIBS" LDFLAGS="$saved_LDFLAGS" CPPFLAGS="$saved_CPPFLAGS" if test $le_found = no ; then AC_MSG_ERROR([libssl (at least version 1.1.0) is required. You can get it from $OPENSSL_URL If it's already installed, specify its path using --with-libssl=/dir/ ]) fi ]) LIBS="-lssl -lcrypto $LIBS" if test $ac_cv_libssl_dir != "(system)"; then if test -d "$ac_cv_libssl_dir/lib" ; then LDFLAGS="-L$ac_cv_libssl_dir/lib $LDFLAGS" le_libdir="$ac_cv_libssl_dir/lib" else LDFLAGS="-L$ac_cv_libssl_dir $LDFLAGS" le_libdir="$ac_cv_libssl_dir" fi if test -d "$ac_cv_libssl_dir/include" ; then CPPFLAGS="-I$ac_cv_libssl_dir/include $CPPFLAGS" else CPPFLAGS="-I$ac_cv_libssl_dir $CPPFLAGS" fi fi ]) fi if test "x$enable_static" = "xyes"; then LIBS="$LIBS -ldl" LDFLAGS="-static $LDFLAGS" fi dnl ---------------------------------------------------------------------------- AC_SEARCH_LIBS(gethugepagesizes, hugetlbfs) AC_HEADER_STDBOOL AH_BOTTOM([#if HAVE_STDBOOL_H #include #else #define bool char #define false 0 #define true 1 #endif ]) AC_CHECK_HEADERS([inttypes.h]) AH_BOTTOM([#ifdef HAVE_INTTYPES_H #include #endif ]) AC_CHECK_HEADERS([sys/auxv.h]) dnl ********************************************************************** dnl Figure out if this system has the stupid sasl_callback_ft dnl ********************************************************************** AC_DEFUN([AC_HAVE_SASL_CALLBACK_FT], [AC_CACHE_CHECK(for sasl_callback_ft, ac_cv_has_sasl_callback_ft, [ AC_TRY_COMPILE([ #ifdef HAVE_SASL_SASL_H #include #include #endif ],[ sasl_callback_ft a_callback; ],[ ac_cv_has_sasl_callback_ft=yes ],[ ac_cv_has_sasl_callback_ft=no ]) ]) if test $ac_cv_has_sasl_callback_ft = yes; then AC_DEFINE(HAVE_SASL_CALLBACK_FT, 1, [we have sasl_callback_ft]) fi ]) AC_HAVE_SASL_CALLBACK_FT dnl ********************************************************************** dnl DETECT_UINT64_SUPPORT dnl dnl check if we can use a uint64_t dnl ********************************************************************** AC_DEFUN([AC_C_DETECT_UINT64_SUPPORT], [ AC_CACHE_CHECK([for print macros for integers (C99 section 7.8.1)], [ac_cv_c_uint64_support], [AC_TRY_COMPILE( [ #ifdef HAVE_INTTYPES_H #include #endif #include ], [ uint64_t val = 0; fprintf(stderr, "%" PRIu64 "\n", val); ], [ ac_cv_c_uint64_support=yes ], [ ac_cv_c_uint64_support=no ]) ]) ]) AC_C_DETECT_UINT64_SUPPORT AS_IF([test "x$ac_cv_c_uint64_support" = "xno"], [AC_MSG_WARN([ Failed to use print macros (PRIu) as defined in C99 section 7.8.1. ])]) AC_C_CONST dnl From licq: Copyright (c) 2000 Dirk Mueller dnl Check if the type socklen_t is defined anywhere AC_DEFUN([AC_C_SOCKLEN_T], [AC_CACHE_CHECK(for socklen_t, ac_cv_c_socklen_t, [ AC_TRY_COMPILE([ #include #include ],[ socklen_t foo; ],[ ac_cv_c_socklen_t=yes ],[ ac_cv_c_socklen_t=no ]) ]) if test $ac_cv_c_socklen_t = no; then AC_DEFINE(socklen_t, int, [define to int if socklen_t not available]) fi ]) AC_C_SOCKLEN_T dnl Check if we're a little-endian or a big-endian system, needed by hash code AC_C_BIGENDIAN( [AC_DEFINE(ENDIAN_BIG, 1, [machine is bigendian])], [AC_DEFINE(ENDIAN_LITTLE, 1, [machine is littleendian])], [AC_MSG_ERROR([Cannot detect endianness. Must pass ac_cv_c_bigendian={yes,no} to configure.])]) AC_DEFUN([AC_C_HTONLL], [ AC_MSG_CHECKING([for htonll]) have_htoll="no" AC_TRY_LINK([ #include #include #ifdef HAVE_INTTYPES_H #include */ #endif ], [ return htonll(0); ], [ have_htoll="yes" AC_DEFINE([HAVE_HTONLL], [1], [Have ntohll]) ], [ have_htoll="no" ]) AC_MSG_RESULT([$have_htoll]) ]) AC_C_HTONLL dnl Check whether the user's system supports pthread AC_SEARCH_LIBS(pthread_create, pthread) if test "x$ac_cv_search_pthread_create" = "xno"; then AC_MSG_ERROR([Can't enable threads without the POSIX thread library.]) fi AC_CHECK_FUNCS(mlockall) AC_CHECK_FUNCS(getpagesizes) AC_CHECK_FUNCS(sysconf) AC_CHECK_FUNCS(memcntl) AC_CHECK_FUNCS(clock_gettime) AC_CHECK_FUNCS(preadv) AC_CHECK_FUNCS(pread) AC_CHECK_FUNCS(eventfd) AC_CHECK_FUNCS([accept4], [AC_DEFINE(HAVE_ACCEPT4, 1, [Define to 1 if support accept4])]) AC_CHECK_FUNCS([getopt_long], [AC_DEFINE(HAVE_GETOPT_LONG, 1, [Define to 1 if support getopt_long])]) dnl Need to disable opt for alignment check. GCC is too clever and turns this dnl into wide stores and no cmp under O2. AC_DEFUN([AC_C_ALIGNMENT], [AC_CACHE_CHECK(for alignment, ac_cv_c_alignment, [ AC_RUN_IFELSE( [AC_LANG_PROGRAM([ #include #include #pragma GCC optimize ("O0") ], [ char *buf = malloc(32); uint64_t *ptr = (uint64_t*)(buf+2); // catch sigbus, etc. *ptr = 0x1; // catch unaligned word access (ARM cpus) #ifdef ENDIAN_BIG #define ALIGNMENT 0x02030405 #else #define ALIGNMENT 0x05040302 #endif *(buf + 0) = 1; *(buf + 1) = 2; *(buf + 2) = 3; *(buf + 3) = 4; *(buf + 4) = 5; int* i = (int*)(buf+1); return (ALIGNMENT == *i) ? 0 : 1; ]) ],[ ac_cv_c_alignment=none ],[ ac_cv_c_alignment=need ],[ dnl cross compile ac_cv_c_alignment=maybe ]) ]) AS_IF([test $ac_cv_c_alignment = need], [AC_DEFINE(NEED_ALIGN, 1, [Machine need alignment])]) AS_IF([test $ac_cv_c_alignment = maybe], [AC_MSG_WARN([Assuming aligned access is required when cross-compiling]) AC_DEFINE(NEED_ALIGN, 1, [Machine need alignment])]) ]) AC_C_ALIGNMENT dnl Check for our specific usage of GCC atomics. dnl These were added in 4.1.2, but 32bit OS's may lack shorts and 4.1.2 dnl lacks testable defines. have_gcc_atomics=no AC_MSG_CHECKING(for GCC atomics) AC_TRY_LINK([],[ unsigned short a; unsigned short b; b = __sync_add_and_fetch(&a, 1); b = __sync_sub_and_fetch(&a, 2); ],[have_gcc_atomics=yes AC_DEFINE(HAVE_GCC_ATOMICS, 1, [GCC Atomics available])]) AC_MSG_RESULT($have_gcc_atomics) dnl Check for usage of 64bit atomics dnl 32bit systems shouldn't have these. have_gcc_64atomics=no AC_MSG_CHECKING(for GCC 64bit atomics) AC_TRY_LINK([#include ],[ uint64_t a; uint64_t b; b = __sync_add_and_fetch(&a, 1); b = __sync_sub_and_fetch(&a, 2); ],[have_gcc_64atomics=yes AC_DEFINE(HAVE_GCC_64ATOMICS, 1, [GCC 64bit Atomics available])]) AC_MSG_RESULT($have_gcc_64atomics) dnl Check for the requirements for running memcached with less privileges dnl than the default privilege set. On Solaris we need setppriv and priv.h dnl If you want to add support for other platforms you should check for dnl your requirements, define HAVE_DROP_PRIVILEGES, and make sure you add dnl the source file containing the implementation into memcached_SOURCE dnl in Makefile.am AC_CHECK_FUNCS(setppriv, [ AC_CHECK_HEADER(priv.h, [ AC_DEFINE([HAVE_DROP_PRIVILEGES], 1, [Define this if you have an implementation of drop_privileges()]) build_solaris_privs=yes ], []) ],[]) AS_IF([test "x$enable_seccomp" = "xyes" ], [ AC_CHECK_LIB(seccomp, seccomp_rule_add, [ AC_DEFINE([HAVE_DROP_PRIVILEGES], 1, [Define this if you have an implementation of drop_privileges()]) build_linux_privs=yes AC_DEFINE([HAVE_DROP_WORKER_PRIVILEGES], 1, [Define this if you have an implementation of drop_worker_privileges()]) build_linux_privs=yes ], []) ]) AC_CHECK_FUNCS(pledge, [ AC_CHECK_HEADER(unistd.h, [ AC_DEFINE([HAVE_DROP_PRIVILEGES], 1, [Define this if you have an implementation of drop_privileges()]) build_openbsd_privs=yes ], []) ],[]) AC_CHECK_FUNCS(cap_enter, [ AC_CHECK_HEADER(sys/capsicum.h, [ AC_DEFINE([HAVE_DROP_PRIVILEGES], 1, [Define this if you have an implementation of drop_privileges()]) build_freebsd_privs=yes ], []) ],[]) AC_CHECK_FUNCS(sandbox_init, [ AC_CHECK_HEADER(sandbox.h, [ AC_DEFINE([HAVE_DROP_PRIVILEGES], 1, [Define this if you have an implementation of drop_privileges()]) build_darwin_privs=yes ], []) ],[]) AM_CONDITIONAL([BUILD_SOLARIS_PRIVS],[test "$build_solaris_privs" = "yes"]) AM_CONDITIONAL([BUILD_LINUX_PRIVS],[test "$build_linux_privs" = "yes"]) AM_CONDITIONAL([BUILD_OPENBSD_PRIVS],[test "$build_openbsd_privs" = "yes"]) AM_CONDITIONAL([BUILD_FREEBSD_PRIVS],[test "$build_freebsd_privs" = "yes"]) AM_CONDITIONAL([BUILD_DARWIN_PRIVS],[test "$build_darwin_privs" = "yes"]) AC_ARG_ENABLE(docs, [AS_HELP_STRING([--disable-docs],[Disable documentation generation])]) AC_PATH_PROG([XML2RFC], [xml2rfc], "no") AC_PATH_PROG([XSLTPROC], [xsltproc], "no") AM_CONDITIONAL([BUILD_SPECIFICATIONS], [test "x$enable_docs" != "xno" -a "x$XML2RFC" != "xno" -a "x$XSLTPROC" != "xno"]) if test "x$enable_werror" = "xyes"; then CFLAGS="$CFLAGS -Werror" fi dnl Let the compiler be a bit more picky. Please note that you cannot dnl specify these flags to the compiler before AC_CHECK_FUNCS, because dnl the test program will generate a compilation warning and hence fail dnl to detect the function ;-) if test "$ICC" = "yes" then dnl ICC trying to be gcc. CFLAGS="$CFLAGS -diag-disable 187 -Wall" AC_DEFINE([_GNU_SOURCE],[1],[make sure IOV_MAX is defined]) elif test "$GCC" = "yes" then GCC_VERSION=`$CC -dumpversion` CFLAGS="$CFLAGS -Wall -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls" if test "x$enable_asan" = "xyes"; then CFLAGS="$CFLAGS -fsanitize=address" fi case $GCC_VERSION in 4.4.*) CFLAGS="$CFLAGS -fno-strict-aliasing" ;; esac AC_DEFINE([_GNU_SOURCE],[1],[make sure IOV_MAX is defined]) elif test "$SUNCC" = "yes" then CFLAGS="$CFLAGS -errfmt=error -errwarn -errshort=tags" fi AC_CONFIG_FILES(Makefile doc/Makefile) AC_OUTPUT