[PATCH i-g-t 1/2] autoconf: Silence void pointer arithmetic warnings

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From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Meson build does it so make the two symmetrical in this respect.

v2:
 * Do it properly. (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index 4f55ea5d0f89..e22703d03198 100644
--- a/configure.ac
+++ b/configure.ac
@@ -256,6 +256,9 @@ AC_ARG_ENABLE(werror,
 			     [Fail on warnings]),
 	      [], [enable_werror=no])
 
+# disable "warning: pointer of type ‘void *’ used in arithmetic"
+AS_COMPILER_FLAG([-Wno-pointer-arith], [CWARNFLAGS+=" -Wno-pointer-arith"], [])
+
 if test "x$enable_debug" = xyes; then
 	AS_COMPILER_FLAG([-g3], [DEBUG_CFLAGS="-g3"], [DEBUG_CFLAGS="-g"])
 	AS_COMPILER_FLAG([-Og], [DEBUG_CFLAGS+=" -Og -Wno-maybe-uninitialized"], # disable maybe-uninitialized due to false positives
-- 
2.19.1

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