configure: test for -Wfloat-conversion

supported by clang, gcc-4.9+

Change-Id: I893766de7307fef9a8b68c0cfae137c9d3b0dbe8

diff --git a/configure b/configure
index 2fe9ba1caefa3c11856a70b9c1ac1519e1b3a621..4ae4217f43dd6be82834d518ef9a7b0267474187 100755 (executable)
--- a/configure
+++ b/configure
@@ -571,6 +571,7 @@ process_toolchain() {
         check_add_cflags -Wall
         check_add_cflags -Wdeclaration-after-statement
         check_add_cflags -Wdisabled-optimization
+        check_add_cflags -Wfloat-conversion
         check_add_cflags -Wpointer-arith
         check_add_cflags -Wtype-limits
         check_add_cflags -Wcast-qual