-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])
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])])
-
-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_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.])
-AH_TEMPLATE([CONFIG_RCU_DEBUG], [Enable internal debugging self-checks. Introduces a performance penalty.])
-AH_TEMPLATE([CONFIG_CDS_LFHT_ITER_DEBUG], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])
-
-# 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=$enableval],
- [def_compiler_tls="yes"])
-
-# Checks for C compiler
-AC_USE_SYSTEM_EXTENSIONS
+# Enable silent rules by default
+AM_SILENT_RULES([yes])
+
+
+## ##
+## OS and Arch specific defaults ##
+## ##
+
+AS_CASE([$host],
+ [*-cygwin*], [LT_NO_UNDEFINED="-no-undefined"]
+)
+
+
+## ##
+## C compiler checks ##
+## ##
+
+# Choose the C compiler
AC_PROG_CC
-AC_PROG_CC_STDC
+# 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])])
-AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:])
+# Make sure we have pthread support
+AX_PTHREAD([], [AC_MSG_ERROR([Could not configure pthread support])])
+
+# Make sure the C compiler supports weak symbols
+AX_SYS_WEAK_ALIAS
+AS_IF([test "x$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 ##
+## ##
-# Checks for programs.
AC_PROG_AWK
+AC_PROG_GREP
AC_PROG_MAKE_SET
AC_CHECK_PROGS(NPROC, [nproc gnproc])
-AC_CHECK_PROGS(GETCONF, [getconf])
+AC_CHECK_PROG(GETCONF, [getconf])
AS_IF([test "x$NPROC" != "x"],
[NPROC_CMD=$NPROC],
[AS_IF([test "x$GETCONF" != "x"],
)
AC_SUBST([NPROC_CMD], [$NPROC_CMD])
+# Initialize and configure libtool
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 $PTHREAD_CFLAGS"
+## ##
+## Library checks ##
+## ##
# Checks for library functions.
AC_FUNC_MMAP
# AC_FUNC_MALLOC causes problems when cross-compiling.
#AC_FUNC_MALLOC
-# Check for headers
-AC_HEADER_STDBOOL
-AC_CHECK_HEADERS([ \
- limits.h \
- stddef.h \
- sys/param.h \
- sys/time.h \
+# Search for clock_gettime() in -lrt
+AC_SEARCH_LIBS([clock_gettime], [rt], [
+ AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1], [clock_gettime() is detected.])
])
-AS_CASE([$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"
-])
+## ##
+## Optionnal features selection ##
+## ##
-# ARM-specific checks
-AS_CASE([$host_cpu], [arm*], [
- AC_MSG_CHECKING([for dmb instruction])
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
- int main()
- {
- asm volatile("dmb":::"memory");
- return 0;
- }
- ]])
- ],[
- AC_MSG_RESULT([yes])
- AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
- ],[
- AC_MSG_RESULT([no])
- ])
-])
+# Allow to fallback to FIXME if the membarrier syscall is unavailable on the
+# running kernel, when disabled, abort if the syscall is unavailable. Applies
+# to default and bulletproof flavors.
+# Enabled by default
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.])
-# Search for clock_gettime
-AC_SEARCH_LIBS([clock_gettime], [rt], [
- AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
- config_rcu_have_clock_gettime=yes
-], [])
-
-AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
+# Use compiler Thread Local Storage, when disabled use pthread_getspecific() to emulate TLS.
+# Enabled by default
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.])
# 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])])
+# Enabled by default
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems.])
# RCU debugging option
-AC_ARG_ENABLE([rcu-debug],
- AS_HELP_STRING([--enable-rcu-debug], [Enable internal debugging
- self-checks. Introduces a performance penalty.]))
-AS_IF([test "x$enable_rcu_debug" = "xyes"], [
- AC_DEFINE([CONFIG_RCU_DEBUG], [1])
-])
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([rcu-debug], [Enable internal debugging self-checks. Introduces a performance penalty.])
# rculfhash iterator debugging
-AC_ARG_ENABLE([cds-lfht-iter-debug],
- AS_HELP_STRING([--enable-cds-lfht-iter-debug], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.]))
-AS_IF([test "x$enable_cds_lfht_iter_debug" = "xyes"], [
- AC_DEFINE([CONFIG_CDS_LFHT_ITER_DEBUG], [1])
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([cds-lfht-iter-debug], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])
+
+
+## ##
+## Set defines for optional features conditionnals in the source code ##
+## ##
+
+AE_IF_FEATURE_DISABLED([sys-membarrier-fallback], [
+ AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
+])
+
+AE_IF_FEATURE_ENABLED([compiler-tls], [
+ AC_DEFINE([CONFIG_RCU_TLS], [1], [Use compiler provided Thread Local Storage.])
+])
+
+AE_IF_FEATURE_ENABLED([smp-support], [
+ AC_DEFINE([CONFIG_RCU_SMP], [1], [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.])
+])
+
+AE_IF_FEATURE_ENABLED([rcu-debug], [
+ AC_DEFINE([CONFIG_RCU_DEBUG], [1], [Enable internal debugging self-checks. Introduces a performance penalty.])
+])
+
+AE_IF_FEATURE_ENABLED([cds-lfht-iter-debug], [
+ AC_DEFINE([CONFIG_CDS_LFHT_ITER_DEBUG], [1], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])
])
+AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS"
+
+AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
+
+
+
# From the sched_setaffinity(2)'s man page:
# ~~~~
# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
])
])
+## ##
+## 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)
PPRINT_PROP_STRING([Target architecture], $host_cpu)
# SMP support enabled/disabled
-test "x$def_smp_support" = "xyes" && value=1 || value=0
+AE_IS_FEATURE_ENABLED([smp-support]) && value=1 || value=0
PPRINT_PROP_BOOL([SMP support], $value)
# TLS
-test "x$def_compiler_tls" = "xyes" && value="compiler TLS" || value="pthread_getspecific()"
+AE_IS_FEATURE_ENABLED([compiler-tls]) && value="compiler TLS" || value="pthread_getspecific()"
PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])
# clock_gettime() available
-test "x$config_rcu_have_clock_gettime" = "xyes" && value=1 || value=0
+test "x$ac_cv_search_function_clock_gettime" != "xno" && value=1 || value=0
PPRINT_PROP_BOOL([clock_gettime()], $value)
# Require membarrier
-test "x$def_sys_membarrier_fallback" != "xyes" && value=1 || value=0
+AE_IS_FEATURE_ENABLED([sys-membarrier-fallback]) && value=0 || value=1
PPRINT_PROP_BOOL([Require membarrier], $value)
# RCU debug enabled/disabled
-test "x$enable_rcu_debug" = "xyes" && value=1 || value=0
+AE_IS_FEATURE_ENABLED([rcu-debug]) && value=1 || value=0
PPRINT_PROP_BOOL([Internal debugging], $value)
# rculfhash iterator debug enabled/disabled
-test "x$enable_cds_lfht_iter_debug" = "xyes" && value=1 || value=0
-PPRINT_PROP_BOOL([Lock-free hash table iterator debugging], $value)
+AE_IS_FEATURE_ENABLED([cds-lfht-iter-debug]) && value=1 || value=0
+PPRINT_PROP_BOOL([Lock-free HT iterator debugging], $value)
PPRINT_PROP_BOOL([Multi-flavor support], 1)
report_bindir="`eval eval echo $bindir`"
report_libdir="`eval eval echo $libdir`"
-# Print the bindir and libdir this `make install' will install into.
+# Print the bindir and libdir this 'make install' will install into.
AS_ECHO
PPRINT_SUBTITLE([Install directories])
PPRINT_PROP_STRING([Binaries], [$report_bindir])
projects / urcu.git / blobdiff