math-emu/soft-fp.h: (_FP_ROUND_ZERO) cast 0 to void to fix warning

BugLink: https://bugs.launchpad.net/bugs/1857158
[ Upstream commit 83312f1b7ae205dca647bf52bbe2d51303cdedfb ]

_FP_ROUND_ZERO is defined as 0 and used as a statemente in macro
_FP_ROUND. This generates "error: statement with no effect
[-Werror=unused-value]" from gcc. Defining _FP_ROUND_ZERO as (void)0 to
fix it.

This modification is quoted from glibc 'commit <In libc/:>
(8ed1e7d5894000c155acbd06f)'

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/include/math-emu/soft-fp.h b/include/math-emu/soft-fp.h
index 3f284bc031809f6cef05a36360f2c54ca2879ad9..5650c1628383057034cbdff2504376a156aeb8f8 100644 (file)
--- a/include/math-emu/soft-fp.h
+++ b/include/math-emu/soft-fp.h
@@ -138,7 +138,7 @@ do {                                                        \
       _FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND);           \
 } while (0)
 
-#define _FP_ROUND_ZERO(wc, X)          0
+#define _FP_ROUND_ZERO(wc, X)          (void)0
 
 #define _FP_ROUND_PINF(wc, X)                          \
 do {                                                   \