X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=10d4ff0041b1b5507733dd131739fb41dfb1898f;hp=82f0c46712f2545ebe661a1a01a996727593bba2;hb=6b5533b01a70007d3637a48dc0948225fe9b5490;hpb=0b1e236d1711f4f9076f73a093ece05aca00eca4 diff --git a/configure.ac b/configure.ac index 82f0c46..10d4ff0 100644 --- a/configure.ac +++ b/configure.ac @@ -1,9 +1,31 @@ -AC_PREREQ(2.59) -AC_INIT([userspace-rcu],[0.12.0],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/]) - +dnl SPDX-License-Identifier: LGPL-2.1-only +dnl +dnl Copyright (C) 2021 EfficiOS, Inc. +dnl +dnl Process this file with autoconf to produce a configure script. + +# Project version information +m4_define([urcu_version_major], [0]) +m4_define([urcu_version_minor], [12]) +m4_define([urcu_version_patch], [0]) +m4_define([urcu_version_dev_stage], []) +m4_define([urcu_version], urcu_version_major[.]urcu_version_minor[.]urcu_version_patch[]urcu_version_dev_stage) + +# Library version information of "liburcu" # 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], [7:0:1]) +m4_define([urcu_lib_version_current], [7]) +m4_define([urcu_lib_version_revision], [0]) +m4_define([urcu_lib_version_age], [1]) +m4_define([urcu_lib_version], urcu_lib_version_current[:]urcu_lib_version_revision[:]urcu_lib_version_age) + + +## ## +## Autoconf base setup ## +## ## + +AC_PREREQ([2.69]) +AC_INIT([userspace-rcu],[urcu_version],[mathieu dot desnoyers at efficios dot com],[],[http://liburcu.org/]) AC_CONFIG_HEADERS([include/config.h include/urcu/config.h]) AC_CONFIG_AUX_DIR([config]) @@ -12,17 +34,105 @@ AC_CONFIG_MACRO_DIR([m4]) AC_CANONICAL_TARGET AC_CANONICAL_HOST -AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip nostdinc]) + +## ## +## Automake base setup ## +## ## + +AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip nostdinc -Wall -Wno-portability -Werror]) AM_MAINTAINER_MODE([enable]) -# Enable silent rules if available (Introduced in AM 1.11) -m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) +# Enable silent rules by default +AM_SILENT_RULES([yes]) + + +## ## +## OS and Arch specific defaults ## +## ## + +AS_CASE([$host], + [*-cygwin*], [LT_NO_UNDEFINED="-no-undefined"] +) + + +## ## +## C compiler checks ## +## ## + +# Choose the C compiler +AC_PROG_CC +# AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70 +m4_version_prereq([2.70], [], [AC_PROG_CC_STDC]) + +# Make sure the C compiler supports C99 +AS_IF([test "$ac_cv_prog_cc_c99" = "no"], [AC_MSG_ERROR([The compiler does not support C99])]) + +# Enable available system extensions and LFS support +AC_USE_SYSTEM_EXTENSIONS +AC_SYS_LARGEFILE + +# Make sure the C compiler supports __attribute__ +AX_C___ATTRIBUTE__ +AS_IF([test "x$ax_cv___attribute__" != "xyes"], + [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])]) + +# Make sure we have pthread support +AX_PTHREAD([], [AC_MSG_ERROR([Could not configure pthread support])]) + +# Make sure the C compiler supports weak symbols +AX_SYS_WEAK_ALIAS +AS_IF([test "x$ax_cv_sys_weak_alias" = "xno"], + [AC_MSG_ERROR([Your platform doesn't support weak symbols.])]) + +# Checks for typedefs, structures, and compiler characteristics. +AC_C_INLINE +AC_C_TYPEOF +AC_TYPE_INT32_T +AC_TYPE_PID_T +AC_TYPE_SIZE_T +AC_TYPE_SSIZE_T +AC_TYPE_UINT16_T +AC_TYPE_UINT32_T +AC_TYPE_UINT64_T +AC_TYPE_UINT8_T + + +## ## +## Header checks ## +## ## + +AC_HEADER_STDBOOL +AC_CHECK_HEADERS([ \ + limits.h \ + stddef.h \ + sys/param.h \ + sys/time.h \ +]) + + +## ## +## Programs checks ## +## ## + +AC_PROG_AWK +AC_PROG_GREP +AC_PROG_MAKE_SET +AC_CHECK_PROGS(NPROC, [nproc gnproc]) +AC_CHECK_PROG(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], [$NPROC_CMD]) + +# Initialize and configure libtool +LT_INIT -AC_REQUIRE_AUX_FILE([tap-driver.sh]) AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.]) -AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) -AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.]) AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.]) AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.]) AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.]) @@ -43,46 +153,8 @@ AC_ARG_ENABLE([compiler-tls], [def_compiler_tls=$enableval], [def_compiler_tls="yes"]) -# Checks for C compiler -AC_USE_SYSTEM_EXTENSIONS -AC_PROG_CC -AC_PROG_CC_STDC - AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:]) -# Checks for programs. -AC_PROG_AWK -AC_PROG_MAKE_SET -AC_CHECK_PROGS(NPROC, [nproc gnproc]) -AC_CHECK_PROGS(GETCONF, [getconf]) -AS_IF([test "x$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$ax_cv___attribute__" = "xyes"], - [:], - [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])]) - -AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])]) AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS" @@ -107,66 +179,12 @@ AC_CHECK_FUNCS([ \ # AC_FUNC_MALLOC causes problems when cross-compiling. #AC_FUNC_MALLOC -# Check for headers -AC_HEADER_STDBOOL -AC_CHECK_HEADERS([ \ - limits.h \ - stddef.h \ - sys/param.h \ - sys/time.h \ -]) - -AS_CASE([$host],[*-cygwin*], - [AM_CONDITIONAL(USE_CYGWIN, true)], - [AM_CONDITIONAL(USE_CYGWIN, false)] -) - -AS_IF([test "$host_cpu" = "armv7l"],[ - AM_CFLAGS="$AM_CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1" -]) - -# ARM-specific checks -AS_CASE([$host_cpu], [arm*], [ - AC_MSG_CHECKING([for dmb instruction]) - AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ - int main() - { - asm volatile("dmb":::"memory"); - return 0; - } - ]]) - ],[ - AC_MSG_RESULT([yes]) - AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) - ],[ - AC_MSG_RESULT([no]) - ]) -]) - -# Check if sys_futex() is available -AC_MSG_CHECKING([for sys_futex()]) -AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ - #include - #ifndef __NR_futex - #error "futexes not available" - #endif - ]]) -],[ - AC_MSG_RESULT([yes]) - AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) - compat_futex_test=0 -],[ - AC_MSG_RESULT([no]) - compat_futex_test=1 -]) - # Search for clock_gettime AC_SEARCH_LIBS([clock_gettime], [rt], [ AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1]) config_rcu_have_clock_gettime=yes ], []) -AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"]) AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"]) # smp-support configure option @@ -293,6 +311,15 @@ AC_CHECK_FUNCS([sched_setaffinity],[ ]) ]) +## ## +## Substitute variables for use in Makefile.am ## +## ## + +# Library versions for libtool +AC_SUBST([URCU_LIBRARY_VERSION], [urcu_lib_version]) + +AC_SUBST(LT_NO_UNDEFINED) + AM_CPPFLAGS="-include config.h" AC_SUBST(AM_CPPFLAGS) @@ -403,10 +430,6 @@ PPRINT_PROP_STRING([Target architecture], $host_cpu) test "x$def_smp_support" = "xyes" && value=1 || value=0 PPRINT_PROP_BOOL([SMP support], $value) -# Futex support available -test "x$compat_futex_test" = "x0" && value=1 || value=0 -PPRINT_PROP_BOOL([Futex support], $value) - # TLS test "x$def_compiler_tls" = "xyes" && value="compiler TLS" || value="pthread_getspecific()" PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])