diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 2451ae338..4b918837e 100644 --- a/configure.ac +++ b/configure.ac @@ -1062,14 +1062,28 @@ AC_LINK_IFELSE( # for FreeBSD thr_self AC_CHECK_HEADERS([sys/thr.h]) -AC_MSG_CHECKING(for compiler atomic operations) +AC_MSG_CHECKING(for compiler sync operations) AC_LINK_IFELSE( [AC_LANG_PROGRAM([], [int foo1; int foo2 = __sync_fetch_and_add(&foo1, 1);])], AC_MSG_RESULT(yes) -AC_DEFINE([HAVE_GCC_ATOMICS], 1, [Define to 1 if your GCC C compiler provides atomic operations.]), +ax_cv_have_gcc_atomics=1 +AC_DEFINE([HAVE_GCC_ATOMICS], 1, [Define to 1 if your GCC C compiler provides __sync atomic operations.]), +AC_MSG_RESULT(no) +) + +AC_MSG_CHECKING(for compiler atomic operations) +AC_LINK_IFELSE( +[AC_LANG_PROGRAM([], [int foo1; int foo2 = __atomic_fetch_add(&foo1, 1, __ATOMIC_RELAXED);])], +AC_MSG_RESULT(yes) +ax_cv_have_c_atomics=1 +AC_DEFINE([HAVE_C_ATOMICS], 1, [Define to 1 if your C compiler provides __atomic operations.]), AC_MSG_RESULT(no) ) +if test -z $ax_cv_have_c_atomics$ax_cv_have_gcc_atomics; then + AC_MSG_ERROR([*** Atomic operations are not supported by your compiler.]) +fi + # glibc, AFAIK, is the only C library that makes printing a NULL to a string safe. AC_MSG_CHECKING([if your system printf is NULL-safe.]) AC_RUN_IFELSE( @@ -1397,9 +1411,6 @@ AST_C_DEFINE_CHECK([RTLD_NOLOAD], [RTLD_NOLOAD], [dlfcn.h]) AST_C_DEFINE_CHECK([IP_MTU_DISCOVER], [IP_MTU_DISCOVER], [netinet/in.h]) -AC_CHECK_HEADER([libkern/OSAtomic.h], - [AC_DEFINE_UNQUOTED([HAVE_OSX_ATOMICS], 1, [Define to 1 if OSX atomic operations are supported.])]) - AC_CHECK_SIZEOF([int]) AC_CHECK_SIZEOF([long]) AC_CHECK_SIZEOF([long long]) |