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meson: Fix plugin symbol export for C++ sources/plugins

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The symbol visibility=hidden flag was only being applied to C
compilation, so plugins implemented in C++ would leak extra symbols
than the 2 _get_desc() and _register().

That also showed that the gst-libs opencv C++ lib was not marking
symbols for export correctly because the BUILDING_GST_OPENCV define
wasn't in the C++ args, so fix that too.
This commit is contained in:
Jan Schmidt 2019-09-06 19:13:46 +10:00 committed by Jan Schmidt
parent 346bca80af
commit c0561fb916
2 changed files with 2 additions and 0 deletions
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1
gst-libs/gst/opencv/meson.build
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@ -17,6 +17,7 @@ if opencv_dep.found()
gstopencv = library('gstopencv-' + api_version, gstopencv = library('gstopencv-' + api_version,
opencv_sources, opencv_sources,
c_args : gst_plugins_bad_args + ['-DBUILDING_GST_OPENCV'], c_args : gst_plugins_bad_args + ['-DBUILDING_GST_OPENCV'],
cpp_args : gst_plugins_bad_args + ['-DBUILDING_GST_OPENCV'],
include_directories : [configinc, libsinc], include_directories : [configinc, libsinc],
version : libversion, version : libversion,
soversion : soversion, soversion : soversion,

1
meson.build
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@ -70,6 +70,7 @@ if cc.get_id() == 'msvc'
export_define = '__declspec(dllexport) extern' export_define = '__declspec(dllexport) extern'
elif cc.has_argument('-fvisibility=hidden') elif cc.has_argument('-fvisibility=hidden')
add_project_arguments('-fvisibility=hidden', language: 'c') add_project_arguments('-fvisibility=hidden', language: 'c')
add_project_arguments('-fvisibility=hidden', language: 'cpp')
export_define = 'extern __attribute__ ((visibility ("default")))' export_define = 'extern __attribute__ ((visibility ("default")))'
else else
export_define = 'extern' export_define = 'extern'