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Bug#45288: pb2 returns a lot of compilation warnings

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Fix assorted warnings that are generated in optimized builds.
Most of it is silencing variables that are set but unused.

This patch also introduces the MY_ASSERT_UNREACHABLE macro
which helps the compiler to deduce that a certain piece of
code is unreachable.

include/my_compiler.h:
  Use GCC's __builtin_unreachable if available. It allows
  GCC to deduce the unreachability of certain code paths,
  thus avoiding warnings that, for example, accused that a
  variable could be used without being initialized (due to
  unreachable code paths).
This commit is contained in:
Davi Arnaut
2010-10-20 16:21:40 -02:00
parent b5bb13ec03
commit 3e9c52250a
18 changed files with 53 additions and 45 deletions
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2
sql/sql_acl.cc
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@ -5479,7 +5479,7 @@ static int handle_grant_struct(uint struct_no, bool drop,
host= grant_name->host.hostname;
break;
default:
assert(0);
MY_ASSERT_UNREACHABLE();
}
if (! user)
user= "";