# 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$GETCONF" != "x"],
)
AC_SUBST([NPROC_CMD], [$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 $PTHREAD_CFLAGS"
# AC_FUNC_MALLOC causes problems when cross-compiling.
#AC_FUNC_MALLOC
-# Check for headers
-AC_HEADER_STDBOOL
-AC_CHECK_HEADERS([ \
- limits.h \
- stddef.h \
- sys/param.h \
- sys/time.h \
-])
-
-AS_CASE([$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])
# 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)
projects / urcu.git / blobdiff