Fix: Don't override user variables within the build system
[urcu.git] / configure.ac
index 0cb4fa4..5aa3433 100644 (file)
@@ -1,25 +1,22 @@
-#                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
-
-AC_INIT([userspace-rcu],[0.7.2],[mathieu dot desnoyers at efficios dot com])
+AC_PREREQ(2.59)
+AC_INIT([userspace-rcu],[0.10.0-pre],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
 
 # 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_SUBST([URCU_LIBRARY_VERSION], [5:0:1])
 
+AC_CONFIG_HEADERS([include/config.h include/urcu/config.h])
 AC_CONFIG_AUX_DIR([config])
-AC_CONFIG_MACRO_DIR([config])
+AC_CONFIG_MACRO_DIR([m4])
+
 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_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip nostdinc])
+AM_MAINTAINER_MODE([enable])
 
-AC_CONFIG_HEADERS([config.h urcu/config.h])
+# Enable silent rules if available (Introduced in AM 1.11)
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 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.])
@@ -27,26 +24,105 @@ AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex suppor
 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], $ac_cv_tls)], [])
+AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
+AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
+AH_TEMPLATE([CONFIG_RCU_DEBUG], [Enable internal debugging self-checks. Introduce performance penalty.])
+
+# Allow requiring the operating system to support the membarrier system
+# call. Applies to default and bulletproof flavors.
+AC_ARG_ENABLE([sys-membarrier-fallback],
+       AS_HELP_STRING([--disable-sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]),
+       [def_sys_membarrier_fallback=$enableval],
+       [def_sys_membarrier_fallback="yes"])
+AS_IF([test "x$def_sys_membarrier_fallback" != "xyes"], [AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1])])
+
+# Allow overriding storage used for TLS variables.
+AC_ARG_ENABLE([compiler-tls],
+       AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
+       [def_compiler_tls=$enableval],
+       [def_compiler_tls="yes"])
+
+# If not overridden, use ax_tls.m4 to check if TLS is available.
+AS_IF([test "x$def_compiler_tls" = "xyes"],
+       [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
+       [:])
+
+AS_IF([test "x$def_tls_detect" = "x"],
+       [:],
+       [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
+
+# Checks for C compiler
+AC_USE_SYSTEM_EXTENSIONS
+AC_PROG_CC
+AC_PROG_CC_STDC
 
 # Checks for programs.
-AC_PROG_CC
+AC_PROG_AWK
 AC_PROG_MAKE_SET
+AC_CHECK_PROGS(NPROC, [nproc gnproc])
+AC_CHECK_PROGS(GETCONF, [getconf])
+AS_IF([test "x$NPROC" != "x"],
+       [NPROC_CMD=$NPROC],
+       [AS_IF([test "x$GETCONF" != "x"],
+               [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
+               [NPROC_CMD="echo 1"]
+       )]
+)
+AC_SUBST([NPROC_CMD], [$NPROC_CMD])
+
 LT_INIT
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_INLINE
 AC_TYPE_PID_T
 AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT16_T
+AC_TYPE_INT32_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_UINT8_T
+
+AX_C___ATTRIBUTE__
+AS_IF([test "x$ax_cv___attribute__" = "xyes"],
+       [:],
+       [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
+
+AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
 
 # Checks for library functions.
-AC_FUNC_MALLOC
 AC_FUNC_MMAP
-AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf])
+AC_FUNC_FORK
+AC_CHECK_FUNCS([ \
+       atexit \
+       getcpuid \
+       gettid \
+       gettimeofday \
+       memeset \
+       memset \
+       munmap \
+       rand_r \
+       sched_getcpu \
+       strerror \
+       strtoul \
+       sysconf \
+])
+
+# AC_FUNC_MALLOC causes problems when cross-compiling.
+#AC_FUNC_MALLOC
+
+# Check for headers
+AC_HEADER_STDBOOL
+AC_CHECK_HEADERS([ \
+       limits.h \
+       stddef.h \
+       sys/param.h \
+       sys/time.h \
+])
 
 # Find arch type
 AS_CASE([$host_cpu],
+       [k1om], [ARCHTYPE="x86"],
        [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
        [i486], [ARCHTYPE="x86"],
        [i586], [ARCHTYPE="x86"],
@@ -56,28 +132,40 @@ AS_CASE([$host_cpu],
        [powerpc], [ARCHTYPE="ppc"],
        [ppc64], [ARCHTYPE="ppc"],
        [powerpc64], [ARCHTYPE="ppc"],
+       [powerpc64le], [ARCHTYPE="ppc"],
        [ppc], [ARCHTYPE="ppc"],
        [s390], [ARCHTYPE="s390"],
        [s390x], [ARCHTYPE="s390"],
+       [sparc], [ARCHTYPE="sparc64"],
        [sparc64], [ARCHTYPE="sparc64"],
        [alpha*], [ARCHTYPE="alpha"],
-       [ia64], [ARCHTYPE="gcc"],
+       [ia64], [ARCHTYPE="ia64"],
        [arm*], [ARCHTYPE="arm"],
+       [aarch64*], [ARCHTYPE="aarch64"],
+       [mips*], [ARCHTYPE="mips"],
+       [nios2*], [ARCHTYPE="nios2"],
+       [tile*], [ARCHTYPE="tile"],
+       [hppa*], [ARCHTYPE="hppa"],
        [ARCHTYPE="unknown"]
 )
 
+AS_CASE([$host],[*-cygwin*],
+       [AM_CONDITIONAL(USE_CYGWIN, true)],
+       [AM_CONDITIONAL(USE_CYGWIN, false)]
+)
+
 AC_SUBST(ARCHTYPE)
 AC_SUBST(SUBARCHTYPE)
 
-UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
-ARCHSRC=urcu/arch/$ARCHTYPE.h
+UATOMICSRC=include/urcu/uatomic/$ARCHTYPE.h
+ARCHSRC=include/urcu/arch/$ARCHTYPE.h
 
 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
        AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
 ])
 
 AS_IF([test "$host_cpu" = "armv7l"],[
-       CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
+       AM_CFLAGS="$AM_CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
 ])
 
 # ARM-specific checks
@@ -98,17 +186,37 @@ AS_IF([test "x$ARCHTYPE" = "xarm"],[
        ])
 ])
 
+# Tile-specific checks
+AS_IF([echo "$host_cpu" | grep "^tile"],[
+       AC_MSG_CHECKING([for Tile architecture type])
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+                               #ifndef __tilegx__
+                               #error
+                               #endif
+               ]])
+       ],[
+               AC_MSG_RESULT([ok])
+       ],[
+               AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
+       ])
+])
+
 # x86-specific checks
 AS_IF([test "x$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"],[
+       #
+       #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
+       #variant but lacks fence instructions.
+       AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om" -a "x$host_cpu" != "xk1om"],[
                AC_MSG_RESULT([yes])
                AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
+               config_rcu_have_fence=yes
        ],[
                AC_MSG_RESULT([no])
+               config_rcu_have_fence=no
        ])
 ])
 
@@ -129,8 +237,15 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
        compat_futex_test=1
 ])
 
+# Search for clock_gettime
+AC_SEARCH_LIBS([clock_gettime], [rt], [
+       AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
+       config_rcu_have_clock_gettime=yes
+], [])
+
 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
+AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
 
 # smp-support configure option
 AC_ARG_ENABLE([smp-support], 
@@ -139,6 +254,13 @@ AC_ARG_ENABLE([smp-support],
        [def_smp_support="yes"])
 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
 
+# RCU debugging option
+AC_ARG_ENABLE([rcu-debug],
+      AS_HELP_STRING([--enable-rcu-debug], [Enable internal debugging
+                     self-checks. Introduce performance penalty.]))
+AS_IF([test "x$enable_rcu_debug" = "xyes"], [
+       AC_DEFINE([CONFIG_RCU_DEBUG], [1])
+])
 
 # From the sched_setaffinity(2)'s man page:
 # ~~~~
@@ -166,11 +288,46 @@ AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
 #  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"
+AC_CHECK_TYPES([cpu_set_t],
+       [have_cpu_set_t="yes"],
+       [have_cpu_set_t="no"],
+       [#include <sched.h>])
+
+# 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([[
+               #include <sched.h>
+               int main()
+               {
+                       cpu_set_t foo; CPU_ZERO(&foo);
+                       return 0;
+               }
+       ]])
+],[
+       AC_DEFINE(HAVE_CPU_ZERO, 1)
+       AC_MSG_RESULT([yes])
+],[
+       AC_MSG_RESULT([no])
+])
+
+# Confirm that we have CPU_SET, and it actually works.
+AC_MSG_CHECKING([whether CPU_SET works])
+AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+               #include <sched.h>
+               int main()
+               {
+                       cpu_set_t foo, mask; CPU_SET(0, &foo);
+                       return 0;
+               }
+       ]])
+],[
+       AC_DEFINE(HAVE_CPU_SET, 1)
+       AC_MSG_RESULT([yes])
+],[
+       AC_MSG_RESULT([no])
+])
 
 # First check if the function is available at all.
 AC_CHECK_FUNCS([sched_setaffinity],[
@@ -180,27 +337,8 @@ AC_CHECK_FUNCS([sched_setaffinity],[
        # 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 <sched.h>
-                               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])
-               ])
-
+       AS_IF([test "x$have_cpu_set_t" = "xyes"], [
+               # We do have it.
                # Check how many arguments does sched_setaffinity take.
                # Should be 3 or 2.
                AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
@@ -209,45 +347,104 @@ AC_CHECK_FUNCS([sched_setaffinity],[
                                int main()
                                {
                                        cpu_set_t foo;
-                                       sched_setaffinity (0, sizeof (foo), &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,
+               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 <sched.h>])
+       ])
 ])
 
-CFLAGS=$saved_CFLAGS
+AM_CPPFLAGS="-include config.h"
+AC_SUBST(AM_CPPFLAGS)
+
+AC_SUBST(AM_CFLAGS)
 
 AC_CONFIG_LINKS([
-       urcu/arch.h:$ARCHSRC
-       urcu/uatomic.h:$UATOMICSRC
+       include/urcu/arch.h:$ARCHSRC
+       include/urcu/uatomic.h:$UATOMICSRC
 ])
 AC_CONFIG_FILES([
        Makefile
        doc/Makefile
+       doc/examples/Makefile
+       include/Makefile
+       src/Makefile
        tests/Makefile
-       liburcu.pc
-       liburcu-bp.pc
-       liburcu-cds.pc
-       liburcu-qsbr.pc
-       liburcu-mb.pc
-       liburcu-signal.pc
+       tests/common/Makefile
+       tests/unit/Makefile
+       tests/benchmark/Makefile
+       tests/regression/Makefile
+       tests/regression/regression_tests
+       tests/utils/Makefile
+       src/liburcu.pc
+       src/liburcu-bp.pc
+       src/liburcu-cds.pc
+       src/liburcu-qsbr.pc
+       src/liburcu-mb.pc
+       src/liburcu-signal.pc
 ])
 AC_OUTPUT
 
-# Report on selected configure options
-AS_IF([test "x$def_smp_support" = "xyes"],[
-       AS_ECHO("SMP support enabled.")
-],[
-       AS_ECHO("SMP support disabled.")
-])
+#
+# Mini-report on what will be built.
+#
+
+PPRINT_INIT
+PPRINT_SET_INDENT(1)
+PPRINT_SET_TS(38)
+
+AS_ECHO
+AS_ECHO("${PPRINT_COLOR_BLDBLU}Userspace-RCU $PACKAGE_VERSION${PPRINT_COLOR_RST}")
+AS_ECHO
+
+PPRINT_SUBTITLE([Features])
+
+PPRINT_PROP_STRING([Target architecture], $host_cpu)
+
+# SMP support enabled/disabled
+test "x$def_smp_support" = "xyes" && value=1 || value=0
+PPRINT_PROP_BOOL([SMP support], $value)
+
+# Memory fence support available
+test "x$config_rcu_have_fence" = "xyes" && value=1 || value=0
+PPRINT_PROP_BOOL([Memory fence instructions], $value)
+
+# Futex support available
+test "x$compat_futex_test" = "x0" && value=1 || value=0
+PPRINT_PROP_BOOL([Futex support], $value)
+
+# TLS
+test "x$def_tls_detect" = "x" && value="pthread_getspecific()" || value="$def_tls_detect"
+PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])
+
+# clock_gettime() available
+test "x$config_rcu_have_clock_gettime" = "xyes" && value=1 || value=0
+PPRINT_PROP_BOOL([clock_gettime()], $value)
+
+# Require membarrier
+test "x$def_sys_membarrier_fallback" != "xyes" && value=1 || value=0
+PPRINT_PROP_BOOL([Require membarrier], $value)
+
+# RCU debug enabled/disabled
+test "x$enable_rcu_debug" = "xyes" && value=1 || value=0
+PPRINT_PROP_BOOL([Internal debugging], $value)
+
+report_bindir="`eval eval echo $bindir`"
+report_libdir="`eval eval echo $libdir`"
+
+# Print the bindir and libdir this `make install' will install into.
+AS_ECHO
+PPRINT_SUBTITLE([Install directories])
+PPRINT_PROP_STRING([Binaries], [$report_bindir])
+PPRINT_PROP_STRING([Libraries], [$report_libdir])
+
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