X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=10d4ff0041b1b5507733dd131739fb41dfb1898f;hp=c36a9fdf10a078b4f8edbdcef0367313efe0cdfd;hb=6b5533b01a70007d3637a48dc0948225fe9b5490;hpb=78d75878ba59e55d36205d78d98be26496e112c1 diff --git a/configure.ac b/configure.ac index c36a9fd..10d4ff0 100644 --- a/configure.ac +++ b/configure.ac @@ -45,39 +45,80 @@ AM_MAINTAINER_MODE([enable]) # Enable silent rules by default 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_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])]) +## ## +## OS and Arch specific defaults ## +## ## -# 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=$enableval], - [def_compiler_tls="yes"]) +AS_CASE([$host], + [*-cygwin*], [LT_NO_UNDEFINED="-no-undefined"] +) -# Checks for C compiler -AC_USE_SYSTEM_EXTENSIONS + +## ## +## 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]) -AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:]) -# Checks for programs. +# Make sure the C compiler supports C99 +AS_IF([test "$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_PROGS(GETCONF, [getconf]) +AC_CHECK_PROG(GETCONF, [getconf]) AS_IF([test "x$NPROC" != "x"], [NPROC_CMD=$NPROC], [AS_IF([test "x$GETCONF" != "x"], @@ -87,25 +128,33 @@ AS_IF([test "x$NPROC" != "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])]) +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_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=$enableval], + [def_compiler_tls="yes"]) + +AS_IF([test "x$def_compiler_tls" = "xyes"], AC_DEFINE([CONFIG_RCU_TLS], [1]), [:]) -AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])]) AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS" @@ -130,20 +179,6 @@ AC_CHECK_FUNCS([ \ # AC_FUNC_MALLOC causes problems when cross-compiling. #AC_FUNC_MALLOC -# Check for headers -AC_HEADER_STDBOOL -AC_CHECK_HEADERS([ \ - limits.h \ - stddef.h \ - sys/param.h \ - sys/time.h \ -]) - -AS_CASE([$host],[*-cygwin*], - [AM_CONDITIONAL(USE_CYGWIN, true)], - [AM_CONDITIONAL(USE_CYGWIN, false)] -) - # Search for clock_gettime AC_SEARCH_LIBS([clock_gettime], [rt], [ AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1]) @@ -283,6 +318,8 @@ AC_CHECK_FUNCS([sched_setaffinity],[ # 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)