Don't set -mfpu=neon globally if the compiler supports neon.

By default only drawhelpers and image loaders will now use neon.
If -mfpu=neon has been explicitly enabled in the mkspec,
QT_ALWAYS_HAVE_NEON will be defined, allowing the use of neon
intrinsics elsewhere.

Task-number: QTBUG-15163
Reviewed-by: Benjamin Poulain <benjamin.poulain@nokia.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/configure b/configure
index a238300..5aab180 100755
--- a/configure
+++ b/configure
@@ -3526,7 +3526,7 @@ Usage:  $relconf [-h] [-prefix <dir>] [-prefix-install] [-bindir <dir>] [-libdir
         [-verbose] [-v] [-silent] [-no-nis] [-nis] [-no-cups] [-cups] [-no-iconv]
         [-iconv] [-no-pch] [-pch] [-no-dbus] [-dbus] [-dbus-linked] [-no-gui]
         [-no-separate-debug-info] [-no-mmx] [-no-3dnow] [-no-sse] [-no-sse2]
-        [-no-sse3] [-no-ssse3] [-no-sse4.1] [-no-sse4.2] [-no-avx]
+        [-no-sse3] [-no-ssse3] [-no-sse4.1] [-no-sse4.2] [-no-avx] [-no-neon]
         [-qtnamespace <namespace>] [-qtlibinfix <infix>] [-separate-debug-info] [-armfpa]
         [-no-optimized-qmake] [-optimized-qmake] [-no-xmlpatterns] [-xmlpatterns]
         [-no-multimedia] [-multimedia] [-no-phonon] [-phonon] [-no-phonon-backend] [-phonon-backend]
@@ -3730,6 +3730,7 @@ cat << EOF
     -no-sse4.1.......... Do not compile with use of SSE4.1 instructions.
     -no-sse4.2.......... Do not compile with use of SSE4.2 instructions.
     -no-avx ............ Do not compile with use of AVX instructions.
+    -no-neon ........... Do not compile with use of NEON instructions.
 
     -qtnamespace <name>  Wraps all Qt library code in 'namespace <name> {...}'.
     -qtlibinfix <infix>  Renames all libQt*.so to libQt*<infix>.so.
@@ -4161,8 +4162,6 @@ Qt for Embedded Linux only:
 
     -iwmmxt ............ Compile using the iWMMXt instruction set
                          (available on some XScale CPUs).
-
-    -no-neon ........... Do not compile with use of NEON instructions.
 EOF
 fi