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6e58332f61
On NetBSD, time_t has for a long time now been __int64_t. On 32-bit CPUs, the compiler is not obliged to define __sync_bool_compare_and_swap_8, so instead this ends up as an undefined symbol when linking rsyslog. This makes the code fall back to the pthread / locking method on these systems, but at least lets the program build.
67 lines
1.9 KiB
Plaintext
67 lines
1.9 KiB
Plaintext
# rsyslog
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#
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# atomic_operations.m4 - autoconf macro to check if compiler supports atomic
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# operations
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#
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# rgerhards, 2008-09-18, added based on
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# http://svn.apache.org/repos/asf/apr/apr/trunk/configure.in
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#
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#
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AC_DEFUN([RS_ATOMIC_OPERATIONS],
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[AC_CACHE_CHECK([whether the compiler provides atomic builtins], [ap_cv_atomic_builtins],
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[AC_TRY_RUN([
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#include <sys/types.h>
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int main()
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{
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unsigned long val = 1010, tmp, *mem = &val;
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time_t tval = 1010, ttmp, *tmem = &tval;
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if (__sync_fetch_and_add(&val, 1010) != 1010 || val != 2020)
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return 1;
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tmp = val;
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if (__sync_fetch_and_sub(mem, 1010) != tmp || val != 1010)
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return 1;
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if (__sync_sub_and_fetch(&val, 1010) != 0 || val != 0)
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return 1;
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tmp = 3030;
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if (__sync_val_compare_and_swap(mem, 0, tmp) != 0 || val != tmp)
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return 1;
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if (__sync_lock_test_and_set(&val, 4040) != 3030)
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return 1;
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mem = &tmp;
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if (__sync_val_compare_and_swap(&mem, &tmp, &val) != &tmp)
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return 1;
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if (__sync_fetch_and_add(&tval, 1010) != 1010 || tval != 2020)
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return 1;
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ttmp = tval;
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if (__sync_fetch_and_sub(tmem, 1010) != ttmp || tval != 1010)
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return 1;
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if (__sync_sub_and_fetch(&tval, 1010) != 0 || tval != 0)
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return 1;
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ttmp = 3030;
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if (__sync_val_compare_and_swap(tmem, 0, ttmp) != 0 || tval != ttmp)
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return 1;
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if (__sync_lock_test_and_set(&tval, 4040) != 3030)
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return 1;
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tmem = &ttmp;
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if (__sync_val_compare_and_swap(&tmem, &ttmp, &tval) != &ttmp)
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return 1;
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__sync_synchronize();
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if (mem != &val)
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return 1;
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if (tmem != &tval)
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return 1;
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return 0;
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}], [ap_cv_atomic_builtins=yes], [ap_cv_atomic_builtins=no], [ap_cv_atomic_builtins=no])])
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if test "$ap_cv_atomic_builtins" = "yes"; then
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AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [Define if compiler provides atomic builtins])
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fi
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])
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