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@@ -0,0 +1,151 @@
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+Patch borrowed from
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+http://code.google.com/p/minimyth/source/browse/trunk/gar-minimyth/script/db/mysql/files/mysql-5.1.47-ac_cache_check.patch?r=6493.
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+
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+It allows to override through ac_cv_* variables various checks that
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+cannot be performed when cross-compiling.
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+
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+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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+
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+diff -Naur mysql-5.1.47-old/storage/innodb_plugin/plug.in mysql-5.1.47-new/storage/innodb_plugin/plug.in
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+--- mysql-5.1.47-old/storage/innodb_plugin/plug.in 2010-05-20 09:55:10.000000000 -0700
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++++ mysql-5.1.47-new/storage/innodb_plugin/plug.in 2010-05-20 09:56:12.000000000 -0700
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+@@ -53,9 +53,10 @@
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+ esac
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+ AC_SUBST(INNODB_DYNAMIC_CFLAGS)
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+
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+- AC_MSG_CHECKING(whether GCC atomic builtins are available)
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++ AC_CACHE_CHECK([whether GCC atomic builtins are available],
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++ [ac_cv_have_decl_HAVE_IB_GCC_ATOMIC_BUILTINS],
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+ # either define HAVE_IB_GCC_ATOMIC_BUILTINS or not
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+- AC_TRY_RUN(
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++ [AC_TRY_RUN(
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+ [
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+ int main()
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+ {
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+@@ -95,18 +96,23 @@
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+ }
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+ ],
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+ [
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+- AC_DEFINE([HAVE_IB_GCC_ATOMIC_BUILTINS], [1],
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+- [GCC atomic builtins are available])
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+ AC_MSG_RESULT(yes)
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++ ac_cv_have_decl_HAVE_IB_GCC_ATOMIC_BUILTINS=yes
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+ ],
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+ [
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+ AC_MSG_RESULT(no)
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++ ac_cv_have_decl_HAVE_IB_GCC_ATOMIC_BUILTINS=no
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+ ]
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+- )
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++ )])
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++ if test "x$ac_cv_have_decl_HAVE_IB_GCC_ATOMIC_BUILTINS"= "xyes" ; then
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++ AC_DEFINE([HAVE_IB_GCC_ATOMIC_BUILTINS], [1],
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++ [GCC atomic builtins are available])
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++ fi
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+
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+- AC_MSG_CHECKING(whether pthread_t can be used by GCC atomic builtins)
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++ AC_CACHE_CHECK([whether pthread_t can be used by GCC atomic builtins],
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++ [ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_GCC],
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+ # either define HAVE_IB_ATOMIC_PTHREAD_T_GCC or not
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+- AC_TRY_RUN(
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++ [AC_TRY_RUN(
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+ [
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+ #include <pthread.h>
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+ #include <string.h>
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+@@ -126,14 +132,18 @@
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+ }
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+ ],
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+ [
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+- AC_DEFINE([HAVE_IB_ATOMIC_PTHREAD_T_GCC], [1],
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+- [pthread_t can be used by GCC atomic builtins])
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+ AC_MSG_RESULT(yes)
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++ ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_GCC=yes
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+ ],
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+ [
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+ AC_MSG_RESULT(no)
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++ ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_GCC=no
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+ ]
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+- )
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++ )])
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++ if test "x$ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_GCC"= "xyes" ; then
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++ AC_DEFINE([HAVE_IB_ATOMIC_PTHREAD_T_GCC], [1],
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++ [pthread_t can be used by GCC atomic builtins])
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++ fi
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+
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+ AC_MSG_CHECKING(whether Solaris libc atomic functions are available)
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+ # either define HAVE_IB_SOLARIS_ATOMICS or not
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+@@ -147,9 +157,10 @@
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+ are available])
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+ )
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+
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+- AC_MSG_CHECKING(whether pthread_t can be used by Solaris libc atomic functions)
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++ AC_CACHE_CHECK([whether pthread_t can be used by Solaris libc atomic functions],
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++ [ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS],
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+ # either define HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS or not
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+- AC_TRY_RUN(
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++ [AC_TRY_RUN(
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+ [
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+ #include <pthread.h>
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+ #include <string.h>
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+@@ -180,28 +191,33 @@
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+ }
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+ ],
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+ [
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+- AC_DEFINE([HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS], [1],
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+- [pthread_t can be used by solaris atomics])
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+ AC_MSG_RESULT(yes)
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++ ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS=yes
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+ ],
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+ [
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+ AC_MSG_RESULT(no)
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++ ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS=no
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+ ]
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+- )
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++ )])
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++ if test "x$ac_cv_have_decl_HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS"= "xyes" ; then
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++ AC_DEFINE([HAVE_IB_ATOMIC_PTHREAD_T_SOLARIS], [1],
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++ [pthread_t can be used by solaris atomics])
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++ fi
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+
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+ # this is needed to know which one of atomic_cas_32() or atomic_cas_64()
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+ # to use in the source
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+ AC_CHECK_SIZEOF([pthread_t], [], [#include <pthread.h>])
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+
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+ # Check for x86 PAUSE instruction
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+- AC_MSG_CHECKING(for x86 PAUSE instruction)
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++ AC_CACHE_CHECK([for x86 PAUSE instruction],
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++ [ac_cv_have_decl_HAVE_IB_PAUSE_INSTRUCTION],
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+ # We have to actually try running the test program, because of a bug
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+ # in Solaris on x86_64, where it wrongly reports that PAUSE is not
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+ # supported when trying to run an application. See
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+ # http://bugs.opensolaris.org/bugdatabase/printableBug.do?bug_id=6478684
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+ # We use ib_ prefix to avoid collisoins if this code is added to
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+ # mysql's configure.in.
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+- AC_TRY_RUN(
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++ [AC_TRY_RUN(
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+ [
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+ int main() {
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+ __asm__ __volatile__ ("pause");
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+@@ -209,16 +225,21 @@
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+ }
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+ ],
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+ [
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+- AC_DEFINE([HAVE_IB_PAUSE_INSTRUCTION], [1], [Does x86 PAUSE instruction exist])
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+ AC_MSG_RESULT(yes)
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++ ac_cv_have_decl_HAVE_IB_PAUSE_INSTRUCTION=yes
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+ ],
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+ [
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+ AC_MSG_RESULT(no)
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++ ac_cv_have_decl_HAVE_IB_PAUSE_INSTRUCTION=no
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+ ],
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+ [
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+ AC_MSG_RESULT(no)
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++ ac_cv_have_decl_HAVE_IB_PAUSE_INSTRUCTION=no
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+ ]
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+- )
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++ )])
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++ if test "x$ac_cv_have_decl_HAVE_IB_PAUSE_INSTRUCTION"= "xyes" ; then
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++ AC_DEFINE([HAVE_IB_PAUSE_INSTRUCTION], [1], [Does x86 PAUSE instruction exist])
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++ fi
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+ ])
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+
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+ # vim: set ft=config:
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