[babl] configure.ac: clean up SSE config

[Ell <ell src gnome org>]

commit 61a30c4914504b2e4ab3b528cafb1b902463437b
Author: Ell <ell_se yahoo com>
Date:   Wed Jul 24 07:58:00 2019 +0300

    configure.ac: clean up SSE config

 configure.ac | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6d89762..7f53331 100644
--- a/configure.ac
+++ b/configure.ac
@@ -342,26 +342,28 @@ AC_ARG_ENABLE(sse,
   enable_sse=$enable_mmx)
 
 AC_ARG_ENABLE(sse2,
-  [  --enable-sse2            enable SSE2 support (default=auto)],,
+  [  --enable-sse2           enable SSE2 support (default=auto)],,
   enable_sse2=$enable_sse)
 
 AC_ARG_ENABLE(sse3,
-  [  --enable-sse3            enable SSE3 support (default=auto)],,
+  [  --enable-sse3           enable SSE3 support (default=auto)],,
   enable_sse3=$enable_sse2)
 
 AC_ARG_ENABLE(sse4_1,
-  [  --enable-sse4_1            enable SSE4_1 support (default=auto)],,
+  [  --enable-sse4_1         enable SSE4_1 support (default=auto)],,
   enable_sse4_1=$enable_sse)
 
 AC_ARG_ENABLE(f16c,
-  [  --enable-f16c            enable hardware half-float support (default=auto)],,
+  [  --enable-f16c           enable hardware half-float support (default=auto)],,
   enable_f16c=$enable_sse)
 
 if test "x$enable_mmx" = xyes; then
   BABL_DETECT_CFLAGS(MMX_EXTRA_CFLAGS, '-mmmx')
   SSE_EXTRA_CFLAGS=
   SSE2_EXTRA_CFLAGS=
+  SSE3_EXTRA_CFLAGS=
   SSE4_1_EXTRA_CFLAGS=
+  F16C_EXTRA_CFLAGS=
 
   AC_MSG_CHECKING(whether we can compile MMX code)
 
@@ -432,7 +434,7 @@ if test "x$enable_mmx" = xyes; then
 
           if test "x$enable_sse4_1" = xyes; then
             BABL_DETECT_CFLAGS(sse4_1_flag, '-msse4.1')
-            SSE4_1_EXTRA_CFLAGS="$SSE_EXTRA_CFLAGS $sse4_1_flag"
+            SSE4_1_EXTRA_CFLAGS="$SSE3_EXTRA_CFLAGS $sse4_1_flag"
 
             AC_MSG_CHECKING(whether we can compile SSE4_1 code)