[libcamera-devel] [PATCH] qcam: Fix compilation errors with gcc-9 and Qt < 5.13

[Laurent Pinchart]

gcc-9 has introduced a deprecated-copy warning that is triggered by Qt
header files. The issue has been fixed in Qt 5.13. Fix compilation with
earlier Qt versions by disabling the warning. In order to still benefit
from the warning when possible, only disable it for gcc-9 and Qt < 5.13.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/qcam/meson.build | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/qcam/meson.build b/src/qcam/meson.build
index 21f91f25cec0..1e71f20fa15e 100644
--- a/src/qcam/meson.build
+++ b/src/qcam/meson.build
@@ -18,11 +18,23 @@ qt5_dep = dependency('qt5',
                      required : false)
 
 if qt5_dep.found()
+    qt5_cpp_args = [ '-DQT_NO_KEYWORDS' ]
+
+    # gcc 9 introduced a deprecated-copy warning that is triggered by Qt until
+    # Qt 5.13. Disable it manually.
+    if cc.get_id() == 'gcc'
+        gcc_version = cc.version().split('.')
+        qt5_version = qt5_dep.version().split('.')
+        if qt5_version[1].to_int() < 13 and gcc_version[0].to_int() >= 9
+            qt5_cpp_args += [ '-Wno-deprecated-copy' ]
+        endif
+    endif
+
     moc_files = qt5.preprocess(moc_headers: qcam_moc_headers,
                                dependencies: qt5_dep)
 
     qcam  = executable('qcam', qcam_sources, moc_files,
                        install : true,
                        dependencies : [libcamera_dep, qt5_dep],
-                       cpp_args : '-DQT_NO_KEYWORDS')
+                       cpp_args : qt5_cpp_args)
 endif
-- 
Regards,

Laurent Pinchart