Android.bp: tell <math.h> we're part of the implementation.

This is needed before we can upgrade to newer versions of this project,
that have added the dummy long double functions for the case where both
double and long double are 64-bit.

Test: builds
Change-Id: Ibc745f3e41cc528b55f108fafb568f4673b488a0

1 files changed, 3 insertions, 0 deletions

diff --git a/Android.bp b/Android.bp
index 3f3f563..0eeff07 100755
--- a/Android.bp
+++ b/Android.bp
@@ -6,6 +6,9 @@ cc_library {
     cflags: [
         "-Werror",
         "-O2",
+        // We're actually implementing bionic here, so we don't want <math.h>
+        // to try to be helpful by renaming long double routines.
+        "-D__BIONIC_LP32_USE_LONG_DOUBLE",
         "-DWANT_ROUNDING=0",
         "-DWANT_ERRNO=0",
         "-DFLT_EVAL_METHOD=0",