We're trying to be -Wundef clean so that we can turn it on (and
eventually make it an error).

Note that the OMX code already used `#if ENABLE_ST_OMX_BELLAGIO` instead
of #ifdef; I could've changed these, but the point of -Wundef is to
catch typos, so we might as well make the change the right way.

Fixes: 83d4a5d5aea5a8a05be2 "st/omx/tizonia: Add H.264 decoder"
Fixes: b2f2236dc565dd1460f0 "st/omx/tizonia: Add H.264 encoder"
Fixes: c62cf1f165919bc74296 "st/omx/tizonia/h264d: Add EGLImage support"
Cc: Gurkirpal Singh <gurkirpal...@gmail.com>
Signed-off-by: Eric Engestrom <eric.engest...@imgtec.com>
---
The meson hunk doesn't look pretty at all, but I'm planning on replacing
all the `pre_args` with a configuration_data(), which will allow to
simplify a lot of this #defines code.
---
 configure.ac |  4 ++++
 meson.build  | 11 +++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 1553ce99da44bca4e826..6de4ceb2fb715505120e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2281,6 +2281,8 @@ if test "x$enable_omx_bellagio" = xyes; then
     PKG_CHECK_MODULES([OMX_BELLAGIO], [libomxil-bellagio >= 
$LIBOMXIL_BELLAGIO_REQUIRED])
     gallium_st="$gallium_st omx_bellagio"
     AC_DEFINE([ENABLE_ST_OMX_BELLAGIO], 1, [Use Bellagio for OMX IL])
+else
+    AC_DEFINE([ENABLE_ST_OMX_BELLAGIO], 0)
 fi
 AM_CONDITIONAL(HAVE_ST_OMX_BELLAGIO, test "x$enable_omx_bellagio" = xyes)
 
@@ -2294,6 +2296,8 @@ if test "x$enable_omx_tizonia" = xyes; then
                        libtizplatform >= $LIBOMXIL_TIZONIA_REQUIRED])
     gallium_st="$gallium_st omx_tizonia"
     AC_DEFINE([ENABLE_ST_OMX_TIZONIA], 1, [Use Tizoina for OMX IL])
+else
+    AC_DEFINE([ENABLE_ST_OMX_TIZONIA], 0)
 fi
 AM_CONDITIONAL(HAVE_ST_OMX_TIZONIA, test "x$enable_omx_tizonia" = xyes)
 
diff --git a/meson.build b/meson.build
index b6e9692f192c528520e7..b9f7cd2aff5fc49e0d93 100644
--- a/meson.build
+++ b/meson.build
@@ -504,7 +504,7 @@ if with_gallium_omx == 'bellagio' or with_gallium_omx == 
'auto'
     'libomxil-bellagio', required : with_gallium_omx == 'bellagio'
   )
   if dep_omx.found()
-    pre_args += '-DENABLE_ST_OMX_BELLAGIO'
+    pre_args += '-DENABLE_ST_OMX_BELLAGIO=1'
     with_gallium_omx = 'bellagio'
   endif
 endif
@@ -525,7 +525,7 @@ if with_gallium_omx == 'tizonia' or with_gallium_omx == 
'auto'
       dependency('tizilheaders', required : with_gallium_omx == 'tizonia'),
     ]
     if dep_omx.found() and dep_omx_other[0].found() and 
dep_omx_other[1].found()
-      pre_args += '-DENABLE_ST_OMX_TIZONIA'
+      pre_args += '-DENABLE_ST_OMX_TIZONIA=1'
       with_gallium_omx = 'tizonia'
     else
       with_gallium_omx = 'disabled'
@@ -533,6 +533,13 @@ if with_gallium_omx == 'tizonia' or with_gallium_omx == 
'auto'
   endif
 endif
 
+if with_gallium_omx != 'bellagio'
+  pre_args += '-DENABLE_ST_OMX_BELLAGIO=0'
+endif
+if with_gallium_omx != 'tizonia'
+  pre_args += '-DENABLE_ST_OMX_TIZONIA=0'
+endif
+
 if with_gallium_omx != 'disabled'
   omx_drivers_path = get_option('omx-libs-path')
   # Figure out where to put the omx driver.
-- 
Cheers,
  Eric

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