X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=0cb4fa46aabba7109382275be53e7142ff09adaa;hp=9bb763d27600c0b0d9dde9f8068ac7d191819117;hb=8afbdefc6a045ed243ee186a64254888e381a9bb;hpb=bf9de1b724767a7b0d9f32385ed3ab8623aabb71 diff --git a/configure.ac b/configure.ac index 9bb763d..0cb4fa4 100644 --- a/configure.ac +++ b/configure.ac @@ -2,27 +2,38 @@ # Process this file with autoconf to produce a configure script. -AC_INIT([userspace-rcu], [0.2.3], [mathieu dot desnoyers at polymtl dot ca]) +AC_INIT([userspace-rcu],[0.7.2],[mathieu dot desnoyers at efficios dot com]) + +# Following the numbering scheme proposed by libtool for the library version +# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html +AC_SUBST([URCU_LIBRARY_VERSION], [1:0:0]) + AC_CONFIG_AUX_DIR([config]) +AC_CONFIG_MACRO_DIR([config]) AC_CANONICAL_TARGET AC_CANONICAL_HOST AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip]) +m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) + +m4_include([config/ax_tls.m4]) + AC_CONFIG_SRCDIR([urcu.h]) -AM_PROG_MKDIR_P AC_CONFIG_HEADERS([config.h urcu/config.h]) -# Keep at the end to do not pollute installed header. -AH_TEMPLATE([CONFIG_URCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.]) -AH_TEMPLATE([CONFIG_URCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) -AH_TEMPLATE([CONFIG_URCU_HAVE_FUTEX], [Defined when on a system with futex support.]) -AH_TEMPLATE([CONFIG_URCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks -cmpxchg instruction.]) +AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.]) +AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) +AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) +AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.]) +AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.]) +AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.]) + +AX_TLS([AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $ac_cv_tls)], []) # Checks for programs. AC_PROG_CC AC_PROG_MAKE_SET -AC_PROG_LIBTOOL +LT_INIT # Checks for typedefs, structures, and compiler characteristics. AC_C_INLINE @@ -32,94 +43,211 @@ AC_TYPE_SIZE_T # Checks for library functions. AC_FUNC_MALLOC AC_FUNC_MMAP -AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul]) +AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf]) # Find arch type -case $target_cpu in - i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;; - i486) ARCHTYPE="x86";; - i586) ARCHTYPE="x86";; - i686) ARCHTYPE="x86";; - x86_64) ARCHTYPE="x86";; - powerpc) ARCHTYPE="ppc" ;; - ppc64) ARCHTYPE="ppc" ;; - powerpc64) ARCHTYPE="ppc" ;; - ppc) ARCHTYPE="ppc" ;; - s390) ARCHTYPE="s390" ;; - s390x) ARCHTYPE="s390" ;; - *) ARCHTYPE="unknown";; -esac - -if test "$ARCHTYPE" = "unknown"; then - AC_MSG_ERROR([Unable to detect the architecture.]) -fi +AS_CASE([$host_cpu], + [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"], + [i486], [ARCHTYPE="x86"], + [i586], [ARCHTYPE="x86"], + [i686], [ARCHTYPE="x86"], + [amd64], [ARCHTYPE="x86"], + [x86_64], [ARCHTYPE="x86"], + [powerpc], [ARCHTYPE="ppc"], + [ppc64], [ARCHTYPE="ppc"], + [powerpc64], [ARCHTYPE="ppc"], + [ppc], [ARCHTYPE="ppc"], + [s390], [ARCHTYPE="s390"], + [s390x], [ARCHTYPE="s390"], + [sparc64], [ARCHTYPE="sparc64"], + [alpha*], [ARCHTYPE="alpha"], + [ia64], [ARCHTYPE="gcc"], + [arm*], [ARCHTYPE="arm"], + [ARCHTYPE="unknown"] +) + AC_SUBST(ARCHTYPE) AC_SUBST(SUBARCHTYPE) -[ -#if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586"; then -#For now, using lock; addl compatibility mode even for i686, because the -#Pentium III is seen as a i686, but lacks mfence instruction. -#Only using fence for x86_64. -if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586" -a "x$target_cpu" != "xi686"; then -] - AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1]) -[ -fi -] - -AC_MSG_CHECKING([sys_futex()]) -AC_TRY_COMPILE( -[ -#include -], -[ -#ifndef __NR_futex -#error "futexes not available" -#endif -], -[ - AC_MSG_RESULT([yes]) - AC_DEFINE([CONFIG_URCU_HAVE_FUTEX], [1]) - compat_futex_test=0 -] -, -[ - AC_MSG_RESULT([no]) - compat_futex_test=1 -] -) +UATOMICSRC=urcu/uatomic/$ARCHTYPE.h +ARCHSRC=urcu/arch/$ARCHTYPE.h + +AS_IF([test "x$SUBARCHTYPE" = xx86compat],[ + AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) +]) -AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ]) +AS_IF([test "$host_cpu" = "armv7l"],[ + CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1" +]) -AM_CONDITIONAL([GCC_API], [test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc]) +# ARM-specific checks +AS_IF([test "x$ARCHTYPE" = "xarm"],[ + AC_MSG_CHECKING([for dmb instruction]) + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ + int main() + { + asm volatile("dmb":::"memory"); + return 0; + } + ]]) + ],[ + AC_MSG_RESULT([yes]) + AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) + ],[ + AC_MSG_RESULT([no]) + ]) +]) -AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ]) +# x86-specific checks +AS_IF([test "x$ARCHTYPE" = "xx86"],[ + AC_MSG_CHECKING([if architecture really supports the mfence instruction]) + #For now, using lock; addl compatibility mode even for i686, because the + #Pentium III is seen as a i686, but lacks mfence instruction. + #Only using fence for x86_64. + AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[ + AC_MSG_RESULT([yes]) + AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) + ],[ + AC_MSG_RESULT([no]) + ]) +]) -[ -if test "x$SUBARCHTYPE" = xx86compat; then -] - AC_DEFINE([CONFIG_URCU_COMPAT_ARCH], [1]) -[ -fi -] +# Check if sys_futex() is available +AC_MSG_CHECKING([for sys_futex()]) +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ + #include + #ifndef __NR_futex + #error "futexes not available" + #endif + ]]) +],[ + AC_MSG_RESULT([yes]) + AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) + compat_futex_test=0 +],[ + AC_MSG_RESULT([no]) + compat_futex_test=1 +]) -AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this - on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"]) +AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"]) +AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"]) + +# smp-support configure option +AC_ARG_ENABLE([smp-support], + AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]), + [def_smp_support=$enableval], + [def_smp_support="yes"]) +AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])]) + + +# From the sched_setaffinity(2)'s man page: +# ~~~~ +# The CPU affinity system calls were introduced in Linux kernel 2.5.8. +# The library interfaces were introduced in glibc 2.3. Initially, the +# glibc interfaces included a cpusetsize argument. In glibc 2.3.3, +# the cpuset size argument was removed, but this argument was +# restored in glibc 2.3.4. +# ~~~~ + +# In addition to that, some vendors ported the system call to 2.4 +# kernels. + +# Furthermore, when the function first appeared, the MASK argument was +# an unsigned long pointer, while later it was made into a cpu_set_t +# pointer. Systems that have the cpu_set_t version also should have +# the CPU_ZERO, CPU_SET, etc. macros. + +# All this mess means we have to cater for at least 3 different +# sched_setaffinity prototypes: + +# ~~~~ +# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); +# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); +# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); +# ~~~~ + +# Since we define _GNU_SOURCE in the sources, must do so too in the +# autoconf tests, as defining _GNU_SOURCE or not exposes +# sched_setaffinity bits differently. +saved_CFLAGS=$CFLAGS +CFLAGS="$CFLAGS -D_GNU_SOURCE" + +# First check if the function is available at all. +AC_CHECK_FUNCS([sched_setaffinity],[ + # Okay, we have it. Check if also have cpu_set_t. If we don't, + # then we have the first version using unsigned long, and no + # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the + # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., + # should also be present, but we confirm nonetheless. + + AC_CHECK_TYPES([cpu_set_t],[ + # We do have it. Confirm that we have CPU_ZERO, and it actually works. + AC_MSG_CHECKING([whether CPU_ZERO works]) + AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works]) + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ + #define _GNU_SOURCE + #include + int main() + { + cpu_set_t foo; CPU_ZERO (&foo); + return 0; + } + ]]) + ],[ + # Works! + AC_DEFINE(HAVE_CPU_ZERO, 1) + AC_MSG_RESULT([yes]) + ],[ + AC_MSG_RESULT([no]) + ]) + + # Check how many arguments does sched_setaffinity take. + # Should be 3 or 2. + AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ + #include + int main() + { + cpu_set_t foo; + sched_setaffinity (0, sizeof (foo), &foo); + return 0; + } + ]]) + ], + [sched_set_affinity_args=3], + [sched_set_affinity_args=2]) + AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, + [Defined to sched_setaffinity's number of arguments.]) + AC_MSG_RESULT([$sched_set_affinity_args]) + ],[ + # No cpu_set_t, always 3 args. + AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) + ], + [#include ]) +]) -[ -if test "$def_smp_support" = "no"; then - echo "SMP support disabled." -else -] - AC_DEFINE([CONFIG_URCU_SMP], [1]) -[ - echo "SMP support enabled." -fi -] +CFLAGS=$saved_CFLAGS +AC_CONFIG_LINKS([ + urcu/arch.h:$ARCHSRC + urcu/uatomic.h:$UATOMICSRC +]) AC_CONFIG_FILES([ Makefile + doc/Makefile tests/Makefile + liburcu.pc + liburcu-bp.pc + liburcu-cds.pc + liburcu-qsbr.pc + liburcu-mb.pc + liburcu-signal.pc ]) AC_OUTPUT + +# Report on selected configure options +AS_IF([test "x$def_smp_support" = "xyes"],[ + AS_ECHO("SMP support enabled.") +],[ + AS_ECHO("SMP support disabled.") +])