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Diffstat (limited to 'erts/aclocal.m4')
| -rw-r--r-- | erts/aclocal.m4 | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/erts/aclocal.m4 b/erts/aclocal.m4 new file mode 100644 index 0000000000..0ad963db12 --- /dev/null +++ b/erts/aclocal.m4 @@ -0,0 +1,938 @@ + +dnl %CopyrightBegin% +dnl +dnl Copyright Ericsson AB 1998-2009. All Rights Reserved. +dnl +dnl The contents of this file are subject to the Erlang Public License, +dnl Version 1.1, (the "License"); you may not use this file except in +dnl compliance with the License. You should have received a copy of the +dnl Erlang Public License along with this software. If not, it can be +dnl retrieved online at http://www.erlang.org/. +dnl +dnl Software distributed under the License is distributed on an "AS IS" +dnl basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +dnl the License for the specific language governing rights and limitations +dnl under the License. +dnl +dnl %CopyrightEnd% + +dnl +dnl aclocal.m4 +dnl +dnl Local macros used in configure.in. The Local Macros which +dnl could/should be part of autoconf are prefixed LM_, macros specific +dnl to the Erlang system are prefixed ERL_. +dnl + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_FIND_EMU_CC +dnl +dnl +dnl Tries fairly hard to find a C compiler that can handle jump tables. +dnl Defines the @EMU_CC@ variable for the makefiles and +dnl inserts NO_JUMP_TABLE in the header if one cannot be found... +dnl + +AC_DEFUN(LM_FIND_EMU_CC, + [AC_CACHE_CHECK(for a compiler that handles jumptables, + ac_cv_prog_emu_cc, + [ +AC_TRY_COMPILE([],[ + __label__ lbl1; + __label__ lbl2; + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; +lbl1: + return 1; +lbl2: + return 2; +],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no) + +if test $ac_cv_prog_emu_cc = no; then + for ac_progname in emu_cc.sh gcc; do + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$ac_progname; then + ac_cv_prog_emu_cc=$ac_dir/$ac_progname + break + fi + done + IFS="$ac_save_ifs" + if test $ac_cv_prog_emu_cc != no; then + break + fi + done +fi + +if test $ac_cv_prog_emu_cc != no; then + save_CC=$CC + save_CFLAGS=$CFLAGS + save_CPPFLAGS=$CPPFLAGS + CC=$ac_cv_prog_emu_cc + CFLAGS="" + CPPFLAGS="" + AC_TRY_COMPILE([],[ + __label__ lbl1; + __label__ lbl2; + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; + lbl1: + return 1; + lbl2: + return 2; + ],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no) + CC=$save_CC + CFLAGS=$save_CFLAGS + CPPFLAGS=$save_CPPFLAGS +fi +]) +if test $ac_cv_prog_emu_cc = no; then + AC_DEFINE(NO_JUMP_TABLE,[],[Defined if no found C compiler can handle jump tables]) + EMU_CC=$CC +else + EMU_CC=$ac_cv_prog_emu_cc +fi +AC_SUBST(EMU_CC) +]) + + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_PROG_INSTALL_DIR +dnl +dnl Figure out how to create directories with parents. +dnl (In my opinion INSTALL_DIR is a bad name, MKSUBDIRS or something is better) +dnl +dnl We prefer 'install -d', but use 'mkdir -p' if it exists. +dnl If none of these methods works, we give up. + +AC_DEFUN(LM_PROG_INSTALL_DIR, +[AC_CACHE_CHECK(how to create a directory including parents, +ac_cv_prog_mkdir_p, +[ +temp_name_base=config.$$ +temp_name=$temp_name_base/x/y/z +$INSTALL -d $temp_name >/dev/null 2>&1 +ac_cv_prog_mkdir_p=none +if test -d $temp_name; then + ac_cv_prog_mkdir_p="$INSTALL -d" +else + mkdir -p $temp_name >/dev/null 2>&1 + if test -d $temp_name; then + ac_cv_prog_mkdir_p="mkdir -p" + fi +fi +rm -fr $temp_name_base +]) + +case "${ac_cv_prog_mkdir_p}" in + none) AC_MSG_ERROR(don't know how create directories with parents) ;; + *) INSTALL_DIR="$ac_cv_prog_mkdir_p" AC_SUBST(INSTALL_DIR) ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_PROG_PERL5 +dnl +dnl Try to find perl version 5. If found set PERL to the absolute path +dnl of the program, if not found set PERL to false. +dnl +dnl On some systems /usr/bin/perl is perl 4 and e.g. +dnl /usr/local/bin/perl is perl 5. We try to handle this case by +dnl putting a couple of +dnl Tries to handle the case that there are two programs called perl +dnl in the path and one of them is perl 5 and the other isn't. +dnl +AC_DEFUN(LM_PROG_PERL5, +[AC_PATH_PROGS(PERL, perl5 perl, false, + /usr/local/bin:/opt/local/bin:/usr/local/gnu/bin:${PATH}) +changequote(, )dnl +dnl[ That bracket is needed to balance the right bracket below +if test "$PERL" = "false" || $PERL -e 'exit ($] >= 5)'; then +changequote([, ])dnl + ac_cv_path_PERL=false + PERL=false +dnl AC_MSG_WARN(perl version 5 not found) +fi +])dnl + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_SO_BSDCOMPAT +dnl +dnl Check if the system has the SO_BSDCOMPAT flag on sockets (linux) +dnl +AC_DEFUN(LM_DECL_SO_BSDCOMPAT, +[AC_CACHE_CHECK([for SO_BSDCOMPAT declaration], ac_cv_decl_so_bsdcompat, +AC_TRY_COMPILE([#include <sys/socket.h>], [int i = SO_BSDCOMPAT;], + ac_cv_decl_so_bsdcompat=yes, + ac_cv_decl_so_bsdcompat=no)) + +case "${ac_cv_decl_so_bsdcompat}" in + "yes" ) AC_DEFINE(HAVE_SO_BSDCOMPAT,[], + [Define if you have SO_BSDCOMPAT flag on sockets]) ;; + * ) ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_INADDR_LOOPBACK +dnl +dnl Try to find declaration of INADDR_LOOPBACK, if nowhere provide a default +dnl + +AC_DEFUN(LM_DECL_INADDR_LOOPBACK, +[AC_CACHE_CHECK([for INADDR_LOOPBACK in netinet/in.h], + ac_cv_decl_inaddr_loopback, +[AC_TRY_COMPILE([#include <sys/types.h> +#include <netinet/in.h>], [int i = INADDR_LOOPBACK;], +ac_cv_decl_inaddr_loopback=yes, ac_cv_decl_inaddr_loopback=no) +]) + +if test ${ac_cv_decl_inaddr_loopback} = no; then + AC_CACHE_CHECK([for INADDR_LOOPBACK in rpc/types.h], + ac_cv_decl_inaddr_loopback_rpc, + AC_TRY_COMPILE([#include <rpc/types.h>], + [int i = INADDR_LOOPBACK;], + ac_cv_decl_inaddr_loopback_rpc=yes, + ac_cv_decl_inaddr_loopback_rpc=no)) + + case "${ac_cv_decl_inaddr_loopback_rpc}" in + "yes" ) + AC_DEFINE(DEF_INADDR_LOOPBACK_IN_RPC_TYPES_H,[], + [Define if you need to include rpc/types.h to get INADDR_LOOPBACK defined]) ;; + * ) + AC_CACHE_CHECK([for INADDR_LOOPBACK in winsock2.h], + ac_cv_decl_inaddr_loopback_winsock2, + AC_TRY_COMPILE([#define WIN32_LEAN_AND_MEAN + #include <winsock2.h>], + [int i = INADDR_LOOPBACK;], + ac_cv_decl_inaddr_loopback_winsock2=yes, + ac_cv_decl_inaddr_loopback_winsock2=no)) + case "${ac_cv_decl_inaddr_loopback_winsock2}" in + "yes" ) + AC_DEFINE(DEF_INADDR_LOOPBACK_IN_WINSOCK2_H,[], + [Define if you need to include winsock2.h to get INADDR_LOOPBACK defined]) ;; + * ) + # couldn't find it anywhere + AC_DEFINE(HAVE_NO_INADDR_LOOPBACK,[], + [Define if you don't have a definition of INADDR_LOOPBACK]) ;; + esac;; + esac +fi +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_STRUCT_SOCKADDR_SA_LEN +dnl +dnl Check if the sockaddr structure has the field sa_len +dnl + +AC_DEFUN(LM_STRUCT_SOCKADDR_SA_LEN, +[AC_CACHE_CHECK([whether struct sockaddr has sa_len field], + ac_cv_struct_sockaddr_sa_len, +AC_TRY_COMPILE([#include <sys/types.h> +#include <sys/socket.h>], [struct sockaddr s; s.sa_len = 10;], + ac_cv_struct_sockaddr_sa_len=yes, ac_cv_struct_sockaddr_sa_len=no)) + +dnl FIXME convbreak +case ${ac_cv_struct_sockaddr_sa_len} in + "no" ) AC_DEFINE(NO_SA_LEN,[1],[Define if you dont have salen]) ;; + *) ;; +esac +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_STRUCT_EXCEPTION +dnl +dnl Check to see whether the system supports the matherr function +dnl and its associated type "struct exception". +dnl + +AC_DEFUN(LM_STRUCT_EXCEPTION, +[AC_CACHE_CHECK([for struct exception (and matherr function)], + ac_cv_struct_exception, +AC_TRY_COMPILE([#include <math.h>], + [struct exception x; x.type = DOMAIN; x.type = SING;], + ac_cv_struct_exception=yes, ac_cv_struct_exception=no)) + +case "${ac_cv_struct_exception}" in + "yes" ) AC_DEFINE(USE_MATHERR,[1],[Define if you have matherr() function and struct exception type]) ;; + * ) ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_SYS_IPV6 +dnl +dnl Check for ipv6 support and what the in6_addr structure is called. +dnl (early linux used in_addr6 insted of in6_addr) +dnl + +AC_DEFUN(LM_SYS_IPV6, +[AC_MSG_CHECKING(for IP version 6 support) +AC_CACHE_VAL(ac_cv_sys_ipv6_support, +[ok_so_far=yes + AC_TRY_COMPILE([#include <sys/types.h> +#include <netinet/in.h>], + [struct in6_addr a6; struct sockaddr_in6 s6;], ok_so_far=yes, ok_so_far=no) + +if test $ok_so_far = yes; then + ac_cv_sys_ipv6_support=yes +else + AC_TRY_COMPILE([#include <sys/types.h> +#include <netinet/in.h>], + [struct in_addr6 a6; struct sockaddr_in6 s6;], + ac_cv_sys_ipv6_support=in_addr6, ac_cv_sys_ipv6_support=no) +fi +])dnl + +dnl +dnl Have to use old style AC_DEFINE due to BC with old autoconf. +dnl + +case ${ac_cv_sys_ipv6_support} in + yes) + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) + ;; + in_addr6) + AC_MSG_RESULT([yes (but I am redefining in_addr6 to in6_addr)]) + AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) + AC_DEFINE(HAVE_IN_ADDR6_STRUCT,[],[Early linux used in_addr6 instead of in6_addr, define if you have this]) + ;; + *) + AC_MSG_RESULT(no) + ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_SYS_MULTICAST +dnl +dnl Check for multicast support. Only checks for multicast options in +dnl setsockopt(), no check is performed that multicasting actually works. +dnl If options are found defines HAVE_MULTICAST_SUPPORT +dnl + +AC_DEFUN(LM_SYS_MULTICAST, +[AC_CACHE_CHECK([for multicast support], ac_cv_sys_multicast_support, +[AC_EGREP_CPP(yes, +[#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#if defined(IP_MULTICAST_TTL) && defined(IP_MULTICAST_LOOP) && defined(IP_MULTICAST_IF) && defined(IP_ADD_MEMBERSHIP) && defined(IP_DROP_MEMBERSHIP) +yes +#endif +], ac_cv_sys_multicast_support=yes, ac_cv_sys_multicast_support=no)]) +if test $ac_cv_sys_multicast_support = yes; then + AC_DEFINE(HAVE_MULTICAST_SUPPORT,[1], + [Define if setsockopt() accepts multicast options]) +fi +])dnl + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_SYS_ERRLIST +dnl +dnl Define SYS_ERRLIST_DECLARED if the variable sys_errlist is declared +dnl in a system header file, stdio.h or errno.h. +dnl + +AC_DEFUN(LM_DECL_SYS_ERRLIST, +[AC_CACHE_CHECK([for sys_errlist declaration in stdio.h or errno.h], + ac_cv_decl_sys_errlist, +[AC_TRY_COMPILE([#include <stdio.h> +#include <errno.h>], [char *msg = *(sys_errlist + 1);], + ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)]) +if test $ac_cv_decl_sys_errlist = yes; then + AC_DEFINE(SYS_ERRLIST_DECLARED,[], + [define if the variable sys_errlist is declared in a system header file]) +fi +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_CHECK_FUNC_DECL( funname, declaration [, extra includes +dnl [, action-if-found [, action-if-not-found]]] ) +dnl +dnl Checks if the declaration "declaration" of "funname" conflicts +dnl with the header files idea of how the function should be +dnl declared. It is useful on systems which lack prototypes and you +dnl need to provide your own (e.g. when you want to take the address +dnl of a function). The 4'th argument is expanded if conflicting, +dnl the 5'th argument otherwise +dnl +dnl + +AC_DEFUN(LM_CHECK_FUNC_DECL, +[AC_MSG_CHECKING([for conflicting declaration of $1]) +AC_CACHE_VAL(ac_cv_func_decl_$1, +[AC_TRY_COMPILE([#include <stdio.h> +$3],[$2 +char *c = (char *)$1; +], eval "ac_cv_func_decl_$1=no", eval "ac_cv_func_decl_$1=yes")]) +if eval "test \"`echo '$ac_cv_func_decl_'$1`\" = yes"; then + AC_MSG_RESULT(yes) + ifelse([$4], , :, [$4]) +else + AC_MSG_RESULT(no) +ifelse([$5], , , [$5 +])dnl +fi +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl ERL_FIND_ETHR_LIB +dnl +dnl Find a thread library to use. Sets ETHR_LIBS to libraries to link +dnl with, ETHR_X_LIBS to extra libraries to link with (same as ETHR_LIBS +dnl except that the ethread lib itself is not included), ETHR_DEFS to +dnl defines to compile with, ETHR_THR_LIB_BASE to the name of the +dnl thread library which the ethread library is based on, and ETHR_LIB_NAME +dnl to the name of the library where the ethread implementation is located. +dnl ERL_FIND_ETHR_LIB currently searches for 'pthreads', and +dnl 'win32_threads'. If no thread library was found ETHR_LIBS, ETHR_X_LIBS, +dnl ETHR_DEFS, ETHR_THR_LIB_BASE, and ETHR_LIB_NAME are all set to the +dnl empty string. +dnl + +AC_DEFUN(ERL_FIND_ETHR_LIB, +[ + +ethr_modified_default_stack_size= + +dnl Name of lib where ethread implementation is located +ethr_lib_name=ethread + +ETHR_THR_LIB_BASE= +ETHR_THR_LIB_BASE_NAME= +ETHR_X_LIBS= +ETHR_LIBS= +ETHR_LIB_NAME= +ETHR_DEFS= + +dnl if test "x$host_os" = "x"; then +dnl AC_CANONICAL_HOST +dnl fi + +dnl win32? +AC_MSG_CHECKING([for native win32 threads]) +if test "X$host_os" = "Xwin32"; then + AC_MSG_RESULT(yes) + # * _WIN32_WINNT >= 0x0400 is needed for + # TryEnterCriticalSection + # * _WIN32_WINNT >= 0x0403 is needed for + # InitializeCriticalSectionAndSpinCount + # The ethread lib will refuse to build if _WIN32_WINNT < 0x0403. + # + # -D_WIN32_WINNT should have been defined in $CPPFLAGS; fetch it + # and save it in ETHR_DEFS. + found_win32_winnt=no + for cppflag in $CPPFLAGS; do + case $cppflag in + -DWINVER*) + ETHR_DEFS="$ETHR_DEFS $cppflag" + ;; + -D_WIN32_WINNT*) + ETHR_DEFS="$ETHR_DEFS $cppflag" + found_win32_winnt=yes + ;; + *) + ;; + esac + done + if test $found_win32_winnt = no; then + AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS]) + fi + ETHR_X_LIBS= + ETHR_THR_LIB_BASE=win32_threads + AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads]) +else + AC_MSG_RESULT(no) + +dnl Try to find POSIX threads + +dnl The usual pthread lib... + AC_CHECK_LIB(pthread, pthread_create, ETHR_X_LIBS="-lpthread") + +dnl FreeBSD has pthreads in special c library, c_r... + if test "x$ETHR_X_LIBS" = "x"; then + AC_CHECK_LIB(c_r, pthread_create, ETHR_X_LIBS="-lc_r") + fi + +dnl On ofs1 the '-pthread' switch should be used + if test "x$ETHR_X_LIBS" = "x"; then + AC_MSG_CHECKING([if the '-pthread' switch can be used]) + saved_cflags=$CFLAGS + CFLAGS="$CFLAGS -pthread" + AC_TRY_LINK([#include <pthread.h>], + pthread_create((void*)0,(void*)0,(void*)0,(void*)0);, + [ETHR_DEFS="-pthread" + ETHR_X_LIBS="-pthread"]) + CFLAGS=$saved_cflags + if test "x$ETHR_X_LIBS" != "x"; then + AC_MSG_RESULT(yes) + else + AC_MSG_RESULT(no) + fi + fi + + if test "x$ETHR_X_LIBS" != "x"; then + ETHR_DEFS="$ETHR_DEFS -D_THREAD_SAFE -D_REENTRANT" + ETHR_THR_LIB_BASE=pthread + AC_DEFINE(ETHR_PTHREADS, 1, [Define if you have pthreads]) + case $host_os in + openbsd*) + # The default stack size is insufficient for our needs + # on OpenBSD. We increase it to 256 kilo words. + ethr_modified_default_stack_size=256;; + solaris*) + ETHR_DEFS="$ETHR_DEFS -D_POSIX_PTHREAD_SEMANTICS" ;; + linux*) + ETHR_DEFS="$ETHR_DEFS -D_POSIX_THREAD_SAFE_FUNCTIONS -D_GNU_SOURCE" + if test "x$erl_xcomp_linux_kernel" != "x"; then + linux_kernel_vsn_=$erl_xcomp_linux_kernel + else + linux_kernel_vsn_=`uname -r` + fi + usable_sigusrx=no + usable_sigaltstack=no + + # FIXME: Test for actual problems instead of kernel versions. + case $linux_kernel_vsn_ in + [[0-1]].*|2.[[0-1]]|2.[[0-1]].*) + ;; + 2.[[2-3]]|2.[[2-3]].*) + usable_sigusrx=yes + ;; + *) + usable_sigusrx=yes + usable_sigaltstack=yes + ;; + esac + + AC_MSG_CHECKING(if SIGUSR1 and SIGUSR2 can be used) + AC_MSG_RESULT($usable_sigusrx) + if test $usable_sigusrx = no; then + ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGUSRX" + fi + + AC_MSG_CHECKING(if sigaltstack can be used) + AC_MSG_RESULT($usable_sigaltstack) + if test $usable_sigaltstack = no; then + ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGALTSTACK" + fi + + AC_MSG_CHECKING(for Native POSIX Thread Library) + case `getconf GNU_LIBPTHREAD_VERSION 2>/dev/null` in + nptl*) nptl=yes;; + NPTL*) nptl=yes;; + *) nptl=no;; + esac + AC_MSG_RESULT($nptl) + if test $nptl = yes; then + ETHR_THR_LIB_BASE_NAME=nptl + fi + if test $nptl = yes; then + need_nptl_incldir=no + AC_CHECK_HEADER(nptl/pthread.h, need_nptl_incldir=yes) + if test $need_nptl_incldir = yes; then + # Ahh... + nptl_path="$C_INCLUDE_PATH:$CPATH:/usr/local/include:/usr/include" + nptl_ws_path= + save_ifs="$IFS"; IFS=":" + for dir in $nptl_path; do + if test "x$dir" != "x"; then + nptl_ws_path="$nptl_ws_path $dir" + fi + done + IFS=$save_ifs + nptl_incldir= + for dir in $nptl_ws_path; do + AC_CHECK_HEADER($dir/nptl/pthread.h, + nptl_incldir=$dir/nptl) + if test "x$nptl_incldir" != "x"; then + ETHR_DEFS="$ETHR_DEFS -isystem $nptl_incldir" + break + fi + done + if test "x$nptl_incldir" = "x"; then + AC_MSG_ERROR(Failed to locate nptl system include directory) + fi + fi + fi + + AC_DEFINE(ETHR_INIT_MUTEX_IN_CHILD_AT_FORK, 1, \ +[Define if mutexes should be reinitialized (instead of unlocked) in child at fork.]) ;; + *) ;; + esac + + dnl We sometimes need ETHR_DEFS in order to find certain headers + dnl (at least for pthread.h on osf1). + saved_cppflags=$CPPFLAGS + CPPFLAGS="$CPPFLAGS $ETHR_DEFS" + + dnl We need the thread library in order to find some functions + saved_libs=$LIBS + LIBS="$LIBS $ETHR_X_LIBS" + + + + dnl + dnl Check for headers + dnl + + AC_CHECK_HEADER(pthread.h, + AC_DEFINE(ETHR_HAVE_PTHREAD_H, 1, \ +[Define if you have the <pthread.h> header file.])) + + dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h> + AC_CHECK_HEADER(pthread/mit/pthread.h, \ + AC_DEFINE(ETHR_HAVE_MIT_PTHREAD_H, 1, \ +[Define if the pthread.h header file is in pthread/mit directory.])) + + AC_CHECK_HEADER(sys/time.h, \ + AC_DEFINE(ETHR_HAVE_SYS_TIME_H, 1, \ +[Define if you have the <sys/time.h> header file.])) + + AC_TRY_COMPILE([#include <time.h> + #include <sys/time.h>], + [struct timeval *tv; return 0;], + AC_DEFINE(ETHR_TIME_WITH_SYS_TIME, 1, \ +[Define if you can safely include both <sys/time.h> and <time.h>.])) + + + dnl + dnl Check for functions + dnl + + AC_CHECK_FUNC(pthread_atfork, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_ATFORK, 1, \ +[Define if you have the pthread_atfork function.])) + AC_CHECK_FUNC(pthread_mutexattr_settype, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_MUTEXATTR_SETTYPE, 1, \ +[Define if you have the pthread_mutexattr_settype function.])) + AC_CHECK_FUNC(pthread_mutexattr_setkind_np, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_MUTEXATTR_SETKIND_NP, 1, \ +[Define if you have the pthread_mutexattr_setkind_np function.])) + AC_CHECK_FUNC(pthread_spin_lock, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_SPIN_LOCK, 1, \ +[Define if you have the pthread_spin_lock function.])) + case $host_os in + linux*) # Writers may get starved + # TODO: write a test that tests the implementation + ;; + *) + AC_CHECK_FUNC(pthread_rwlock_init, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCK_INIT, 1, \ +[Define if you have a pthread_rwlock implementation that can be used.])) + ;; + esac + AC_CHECK_FUNC(pthread_attr_setguardsize, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \ +[Define if you have the pthread_attr_setguardsize function.])) + + dnl Restore LIBS + LIBS=$saved_libs + dnl restore CPPFLAGS + CPPFLAGS=$saved_cppflags + + fi +fi + +AC_MSG_CHECKING([whether default stack size should be modified]) +if test "x$ethr_modified_default_stack_size" != "x"; then + AC_DEFINE_UNQUOTED(ETHR_MODIFIED_DEFAULT_STACK_SIZE, $ethr_modified_default_stack_size, [Define if you want to modify the default stack size]) + AC_MSG_RESULT([yes; to $ethr_modified_default_stack_size kilo words]) +else + AC_MSG_RESULT([no]) +fi + +if test "x$ETHR_THR_LIB_BASE" != "x"; then + ETHR_DEFS="-DUSE_THREADS $ETHR_DEFS" + ETHR_LIBS="-l$ethr_lib_name $ETHR_X_LIBS" + ETHR_LIB_NAME=$ethr_lib_name +fi + +AC_CHECK_SIZEOF(void *, 4) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF_PTR, $ac_cv_sizeof_void_p, [Define to the size of pointers]) + +if test "X$disable_native_ethr_impls" = "Xyes"; then + AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations]) +fi + +AC_DEFINE(ETHR_HAVE_ETHREAD_DEFINES, 1, \ +[Define if you have all ethread defines]) + +AC_SUBST(ETHR_X_LIBS) +AC_SUBST(ETHR_LIBS) +AC_SUBST(ETHR_LIB_NAME) +AC_SUBST(ETHR_DEFS) +AC_SUBST(ETHR_THR_LIB_BASE) +AC_SUBST(ETHR_THR_LIB_BASE_NAME) + +]) + + + +dnl ---------------------------------------------------------------------- +dnl +dnl ERL_TIME_CORRECTION +dnl +dnl In the presence of a high resolution realtime timer Erlang can adapt +dnl its view of time relative to this timer. On solaris such a timer is +dnl available with the syscall gethrtime(). On other OS's a fallback +dnl solution using times() is implemented. (However on e.g. FreeBSD times() +dnl is implemented using gettimeofday so it doesn't make much sense to +dnl use it there...) On second thought, it seems to be safer to do it the +dnl other way around. I.e. only use times() on OS's where we know it will +dnl work... +dnl + +AC_DEFUN(ERL_TIME_CORRECTION, +[if test x$ac_cv_func_gethrtime = x; then + AC_CHECK_FUNC(gethrtime) +fi +if test x$clock_gettime_correction = xunknown; then + AC_TRY_COMPILE([#include <time.h>], + [struct timespec ts; + long long result; + clock_gettime(CLOCK_MONOTONIC,&ts); + result = ((long long) ts.tv_sec) * 1000000000LL + + ((long long) ts.tv_nsec);], + clock_gettime_compiles=yes, + clock_gettime_compiles=no) +else + clock_gettime_compiles=no +fi + + +AC_CACHE_CHECK([how to correct for time adjustments], erl_cv_time_correction, +[ +case $clock_gettime_correction in + yes) + erl_cv_time_correction=clock_gettime;; + no|unknown) + case $ac_cv_func_gethrtime in + yes) + erl_cv_time_correction=hrtime ;; + no) + case $host_os in + linux*) + case $clock_gettime_correction in + unknown) + if test x$clock_gettime_compiles = xyes; then + linux_kernel_vsn_=`uname -r` + case $linux_kernel_vsn_ in + [[0-1]].*|2.[[0-5]]|2.[[0-5]].*) + erl_cv_time_correction=times ;; + *) + erl_cv_time_correction=clock_gettime;; + esac + else + erl_cv_time_correction=times + fi + ;; + *) + erl_cv_time_correction=times ;; + esac + ;; + *) + erl_cv_time_correction=none ;; + esac + ;; + esac + ;; +esac +]) +xrtlib="" +case $erl_cv_time_correction in + times) + AC_DEFINE(CORRECT_USING_TIMES,[], + [Define if you do not have a high-res. timer & want to use times() instead]) + ;; + clock_gettime) + xrtlib="-lrt" + AC_DEFINE(GETHRTIME_WITH_CLOCK_GETTIME,[1], + [Define if you want to use clock_gettime to simulate gethrtime]) + ;; +esac +dnl +dnl Check if gethrvtime is working, and if to use procfs ioctl +dnl or (yet to be written) write to the procfs ctl file. +dnl + +AC_MSG_CHECKING([if gethrvtime works and how to use it]) +AC_TRY_RUN([ +/* gethrvtime procfs ioctl test */ +/* These need to be undef:ed to not break activation of + * micro level process accounting on /proc/self + */ +#ifdef _LARGEFILE_SOURCE +# undef _LARGEFILE_SOURCE +#endif +#ifdef _FILE_OFFSET_BITS +# undef _FILE_OFFSET_BITS +#endif +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/signal.h> +#include <sys/fault.h> +#include <sys/syscall.h> +#include <sys/procfs.h> +#include <fcntl.h> + +int main() { + long msacct = PR_MSACCT; + int fd; + long long start, stop; + int i; + pid_t pid = getpid(); + char proc_self[30] = "/proc/"; + + sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid); + if ( (fd = open(proc_self, O_WRONLY)) == -1) + exit(1); + if (ioctl(fd, PIOCSET, &msacct) < 0) + exit(2); + if (close(fd) < 0) + exit(3); + start = gethrvtime(); + for (i = 0; i < 100; i++) + stop = gethrvtime(); + if (start == 0) + exit(4); + if (start == stop) + exit(5); + exit(0); return 0; +} +], erl_gethrvtime=procfs_ioctl, erl_gethrvtime=false, erl_gethrvtime=false) +case $erl_gethrvtime in + procfs_ioctl) + AC_DEFINE(HAVE_GETHRVTIME_PROCFS_IOCTL,[1], + [define if gethrvtime() works and uses ioctl() to /proc/self]) + AC_MSG_RESULT(uses ioctl to procfs) + ;; + *) + AC_MSG_RESULT(not working) + + dnl + dnl Check if clock_gettime (linux) is working + dnl + + AC_MSG_CHECKING([if clock_gettime can be used to get process CPU time]) + save_libs=$LIBS + LIBS="-lrt" + AC_TRY_RUN([ + #include <stdlib.h> + #include <unistd.h> + #include <string.h> + #include <stdio.h> + #include <time.h> + int main() { + long long start, stop; + int i; + struct timespec tp; + + if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp) < 0) + exit(1); + start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; + for (i = 0; i < 100; i++) + clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp); + stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; + if (start == 0) + exit(4); + if (start == stop) + exit(5); + exit(0); return 0; + } + ], erl_clock_gettime=true, erl_clock_gettime=false, erl_clock_gettime=false) + LIBS=$save_libs + case $host_os in + linux*) + AC_MSG_RESULT([not stable, disabled]) + LIBRT=$xrtlib + ;; + *) + case $erl_clock_gettime in + true) + AC_DEFINE(HAVE_CLOCK_GETTIME,[], + [define if clock_gettime() works for getting process time]) + AC_MSG_RESULT(using clock_gettime) + LIBRT=-lrt + ;; + *) + AC_MSG_RESULT(not working) + LIBRT=$xrtlib + ;; + esac + ;; + esac + AC_SUBST(LIBRT) + ;; +esac +])dnl + +dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY +dnl [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]]) +dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a +dnl AC_LANG_JAVA instead...) +AC_DEFUN(ERL_TRY_LINK_JAVA, +[java_link='$JAVAC conftest.java 1>&AC_FD_CC' +changequote(�, �)dnl +cat > conftest.java <<EOF +�$1� +class conftest { public static void main(String[] args) { + �$2� + ; return; }} +EOF +changequote([, ])dnl +if AC_TRY_EVAL(java_link) && test -s conftest.class; then + ifelse([$3], , :, [rm -rf conftest* + $3]) +else + echo "configure: failed program was:" 1>&AC_FD_CC + cat conftest.java 1>&AC_FD_CC + echo "configure: PATH was $PATH" 1>&AC_FD_CC +ifelse([$4], , , [ rm -rf conftest* + $4 +])dnl +fi +rm -f conftest*]) +#define UNSAFE_MASK 0xc0000000 /* Mask for bits that must be constant */ + + |