From 1d04a8ea3b9fac4a94c23b87753cb841debd668a Mon Sep 17 00:00:00 2001
From: Packit Service <user-cont-team+packit-service@redhat.com>
Date: Dec 16 2020 23:29:21 +0000
Subject: Apply patch kyotocabinet-1.2.76-8-byte-atomics.patch


patch_name: kyotocabinet-1.2.76-8-byte-atomics.patch
present_in_specfile: true

---

diff --git a/configure b/configure
index d36c87e..a093217 100755
--- a/configure
+++ b/configure
@@ -4012,25 +4012,22 @@ fi
 # Atomic operations
 if test "$enable_atomic" != "no"
 then
-  printf 'checking for atomic operations... '
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
+  printf 'checking for 8 byte atomic operations... '
+  if printf '
+/* Some targets support 4 byte atomics, but not 8 byte atomics,
+ * and will fail at link time if they are used.
+ *
+ * http://gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Atomic-Builtins.html
+ * http://gcc.gnu.org/wiki/Atomic
+ */
+#include <stdint.h>
 int
 main ()
 {
-__sync_fetch_and_add
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
-  MYGCCATOMIC=yes
-else
-  MYGCCATOMIC=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  if test "$MYGCCATOMIC" = "yes"
+uint64_t n = 0xdeadbeaf;
+__sync_bool_compare_and_swap(&n, 0xdeadbeaf, 0);
+return n;
+}' | $CC -xc -o config.tmp - >/dev/null 2>&1
   then
     MYCPPFLAGS="$MYCPPFLAGS -D_MYGCCATOMIC"
     printf 'yes\n'
diff --git a/configure.in b/configure.in
index bcb11d2..4966bae 100644
--- a/configure.in
+++ b/configure.in
@@ -238,9 +238,22 @@ fi
 # Atomic operations
 if test "$enable_atomic" != "no"
 then
-  printf 'checking for atomic operations... '
-  AC_TRY_COMPILE([], [__sync_fetch_and_add], [MYGCCATOMIC=yes], [MYGCCATOMIC=no])
-  if test "$MYGCCATOMIC" = "yes"
+  printf 'checking for 8 byte atomic operations... '
+  if printf '
+/* Some targets support 4 byte atomics, but not 8 byte atomics,
+ * and will fail at link time if they are used.
+ *
+ * http://gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Atomic-Builtins.html
+ * http://gcc.gnu.org/wiki/Atomic
+ */
+#include <stdint.h>
+int
+main ()
+{
+uint64_t n = 0xdeadbeaf;
+__sync_bool_compare_and_swap(&n, 0xdeadbeaf, 0);
+return n;
+}' | $CC -xc -o config.tmp - >/dev/null 2>&1
   then
     MYCPPFLAGS="$MYCPPFLAGS -D_MYGCCATOMIC"
     printf 'yes\n'