From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 5 Jul 2024 08:40:26 +0000 (+0100)
Subject: linux-user/main: Suppress out-of-range comparison warning for clang
X-Git-Tag: qemu-xen-4.20.0~85^2~21
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=f324a03ee23177e41509786bf09c9e7263989ff8;p=qemu-xen.git

linux-user/main: Suppress out-of-range comparison warning for clang

For arm32 host and arm64 guest we get

.../main.c:851:32: error: result of comparison of constant 70368744177664 with expression of type 'unsigned long' is always false [-Werror,-Wtautological-constant-out-of-range-compare]
        if (TASK_UNMAPPED_BASE < reserved_va) {
            ~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~

We already disable -Wtype-limits here, for this exact comparison, but
that is not enough for clang.  Disable -Wtautological-compare as well,
which is a superset.  GCC ignores the unknown warning flag.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240630190050.160642-15-richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240705084047.857176-20-alex.bennee@linaro.org>
---

diff --git a/linux-user/main.c b/linux-user/main.c
index 94c99a1366..7d3cf45fa9 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -843,6 +843,7 @@ int main(int argc, char **argv, char **envp)
      */
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wtype-limits"
+#pragma GCC diagnostic ignored "-Wtautological-compare"
 
     /*
      * Select an initial value for task_unmapped_base that is in range.