X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=89b34ae7313ef0b183a625cc2692bd22902ec423;hp=c7492df594c081bcd9a723a4dd1e40ef4bc704c0;hb=ee334e481cf5b4216bc61a8b291c9b944c3b4f86;hpb=c673679bdf8346feb043b9fac34f2ddb8eeca4ea diff --git a/configure.ac b/configure.ac index c7492df..89b34ae 100644 --- a/configure.ac +++ b/configure.ac @@ -6,9 +6,9 @@ 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_minor], [13]) m4_define([urcu_version_patch], [0]) -m4_define([urcu_version_dev_stage], []) +m4_define([urcu_version_dev_stage], [-pre]) m4_define([urcu_version], urcu_version_major[.]urcu_version_minor[.]urcu_version_patch[]urcu_version_dev_stage) # Library version information of "liburcu" @@ -96,6 +96,39 @@ AC_TYPE_UINT32_T AC_TYPE_UINT64_T AC_TYPE_UINT8_T +# Detect warning flags supported by the C compiler and append them to +# WARN_CFLAGS. +m4_define([WARN_FLAGS_LIST], [ dnl + -Wall dnl + -Wextra dnl + -Wmissing-prototypes dnl + -Wmissing-declarations dnl + -Wnull-dereference dnl + -Wundef dnl + -Wshadow dnl + -Wjump-misses-init dnl + -Wsuggest-attribute=format dnl + -Wtautological-constant-out-of-range-compare dnl + -Wnested-externs dnl + -Wwrite-strings dnl + -Wformat=2 dnl + -Wstrict-aliasing dnl + -Wmissing-noreturn dnl + -Winit-self dnl + -Wduplicated-cond dnl + -Wduplicated-branches dnl + -Wlogical-op dnl + dnl + dnl-Wredundant-decls dnl + -Wno-null-dereference dnl +]) + +# Pass -Werror as an extra flag during the test: this is needed to make the +# -Wunknown-warning-option diagnostic fatal with clang. +AC_LANG_PUSH([C]) +AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CFLAGS], [-Werror]) +AC_LANG_POP([C]) + ## ## ## Header checks ## @@ -118,7 +151,7 @@ AC_PROG_AWK AC_PROG_GREP AC_PROG_MAKE_SET AC_CHECK_PROGS(NPROC, [nproc gnproc]) -AC_CHECK_PROG(GETCONF, [getconf]) +AC_CHECK_PROGS(GETCONF, [getconf]) AS_IF([test "x$NPROC" != "x"], [NPROC_CMD=$NPROC], [AS_IF([test "x$GETCONF" != "x"], @@ -149,6 +182,7 @@ AC_CHECK_FUNCS([ \ munmap \ rand_r \ sched_getcpu \ + sched_setaffinity \ strerror \ strtoul \ sysconf \ @@ -163,158 +197,71 @@ AC_SEARCH_LIBS([clock_gettime], [rt], [ ]) +## ## +## Optionnal features selection ## +## ## -AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.]) -AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.]) -AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.]) -AH_TEMPLATE([CONFIG_RCU_DEBUG], [Enable internal debugging self-checks. Introduces a performance penalty.]) -AH_TEMPLATE([CONFIG_CDS_LFHT_ITER_DEBUG], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.]) - -# Allow requiring the operating system to support the membarrier system -# call. Applies to default and bulletproof flavors. -AC_ARG_ENABLE([sys-membarrier-fallback], - AS_HELP_STRING([--disable-sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]), - [def_sys_membarrier_fallback=$enableval], - [def_sys_membarrier_fallback="yes"]) -AS_IF([test "x$def_sys_membarrier_fallback" != "xyes"], [AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1])]) +# Allow to fallback to FIXME if the membarrier syscall is unavailable on the +# running kernel, when disabled, abort if the syscall is unavailable. Applies +# to default and bulletproof flavors. +# Enabled by default +AE_FEATURE_DEFAULT_ENABLE +AE_FEATURE([sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]) -# Allow overriding storage used for TLS variables. -AC_ARG_ENABLE([compiler-tls], - AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]), - [def_compiler_tls=$enableval], - [def_compiler_tls="yes"]) +# 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.]) -AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:]) +# smp-support configure option +# Enabled by default +AE_FEATURE_DEFAULT_ENABLE +AE_FEATURE([smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems.]) +# RCU debugging option +# Disabled by default +AE_FEATURE_DEFAULT_DISABLE +AE_FEATURE([rcu-debug], [Enable internal debugging self-checks. Introduces a performance penalty.]) -AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS" +# rculfhash iterator debugging +# Disabled by default +AE_FEATURE_DEFAULT_DISABLE +AE_FEATURE([cds-lfht-iter-debug], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.]) -AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"]) -# 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])]) +## ## +## Set defines for optional features conditionnals in the source code ## +## ## -# 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$enable_rcu_debug" = "xyes"], [ - AC_DEFINE([CONFIG_RCU_DEBUG], [1]) +AE_IF_FEATURE_DISABLED([sys-membarrier-fallback], [ + AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1], [Require the operating system to support the membarrier system call for default and bulletproof flavors.]) ]) -# rculfhash iterator debugging -AC_ARG_ENABLE([cds-lfht-iter-debug], - AS_HELP_STRING([--enable-cds-lfht-iter-debug], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])) -AS_IF([test "x$enable_cds_lfht_iter_debug" = "xyes"], [ - AC_DEFINE([CONFIG_CDS_LFHT_ITER_DEBUG], [1]) +AE_IF_FEATURE_ENABLED([compiler-tls], [ + AC_DEFINE([CONFIG_RCU_TLS], [1], [Use compiler provided Thread Local Storage.]) ]) -# 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); -# ~~~~ - -AC_CHECK_TYPES([cpu_set_t], - [have_cpu_set_t="yes"], - [have_cpu_set_t="no"], - [#include ]) - -# 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 - 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]) +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.]) ]) -# 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 - int main() - { - cpu_set_t foo; CPU_SET(0, &foo); - return 0; - } - ]]) -],[ - AC_DEFINE(HAVE_CPU_SET, 1) - AC_MSG_RESULT([yes]) -],[ - AC_MSG_RESULT([no]) +AE_IF_FEATURE_ENABLED([rcu-debug], [ + AC_DEFINE([CONFIG_RCU_DEBUG], [1], [Enable internal debugging self-checks. Introduces a performance penalty.]) ]) -# 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. - - 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]) - 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) - ]) +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.]) ]) + +## ## +## Set automake variables for optional feature conditionnals in Makefile.am ## +## ## + +# Building the examples requires the shared libraries to be enabled +AM_CONDITIONAL([ENABLE_EXAMPLES], AE_IS_FEATURE_ENABLED([shared])) + + ## ## ## Substitute variables for use in Makefile.am ## ## ## @@ -324,12 +271,20 @@ AC_SUBST([URCU_LIBRARY_VERSION], [urcu_lib_version]) AC_SUBST(LT_NO_UNDEFINED) -AM_CPPFLAGS="-include config.h" +# The order in which the include folders are searched is important. +# The top_builddir should always be searched first in the event that a build +# time generated file is included. +AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_srcdir)/include -include config.h" AC_SUBST(AM_CPPFLAGS) -AM_CFLAGS="-Wall -Wextra -Wno-unused-parameter $AM_CFLAGS" +AM_CFLAGS="$WARN_CFLAGS $PTHREAD_CFLAGS" AC_SUBST(AM_CFLAGS) + +## ## +## Output files generated by configure ## +## ## + AC_CONFIG_FILES([ Makefile doc/Makefile @@ -431,11 +386,11 @@ PPRINT_SUBTITLE([Features]) 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)], [$value]) # clock_gettime() available @@ -443,23 +398,23 @@ test "x$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])