Comments (6)
I have the following line in my main Android.mk
file:
LOCAL_LDLIBS += -ldl -lEGL -lGLESv3 -llog -lz -landroid \
-lgvr
However, the debugger shows this:
I also tried adding -lGLESv3 to Android.mk files for fplbase (on FPLBASE_COMMON_LDLIBS
) but the debugger still shows the same.
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On your API target, those functions should be natively available, i.e we do:
#if __ANDROID_API__ >= 18
#include <GLES3/gl3.h>
#else // __ANDROID_API__ < 18
#include <GLES2/gl2.h>
#include "gl3stub.h"
#endif // __ANDROID_API__ < 18
Only the stubs should declare them as variables that can be NULL. The init (which shouldn't run on your machine) is here:
void AndroidInitGl3Functions() {
#if __ANDROID_API__ < 18
gl3stubInit();
#endif
}
Can you check if gl3stubInit()
runs? if so, there may be something wrong with your target settings?
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It doesn't run, i.e. I checked the __ANDROID_API__
variable and it is correctly set to 24. I also tried calling gl3stubInit from my application code. It returns GL_TRUE, but the segmentation fault persists.
from fplbase.
Given your idea, I fixed it by removing $(NDK_ROOT)/sources/android/ndk-helper/gl3stub.c
from FPLBASE_COMMON_SRC_FILES
. I also have -lGLESv3
in my project's Android.mk
, but that might be irrelevant. After that, the debugger no longer shows NULL for glGenVertexArrays
. Although, it shows a link to libGLESv2.so
for this function. But that's probably fine.
I could set a PR with this fix, but I'm not sure how to check for APP_PLATFORM < 18
(or something like that) to conditionally add gl3stub.c
as source in fplbase's Android.mk
.
from fplbase.
Wow, I guess this is really a linker problem then? It sees two definitions of the function, and somehow decides to make it point to the uninitialized one from gl3stub.c
.
Which is weird, because I'd think they'd look like different kind of symbols to the linker, given that one is not necessarily a function pointer variable.
Anyway, as to how to fix this.. @stewartmiles, do you know how to make this conditional?
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I think the easiest way to conditionally compile $(NDK_ROOT)/sources/android/ndk_helper/gl3stub.c
is to add a fplbase file that includes a new file e.g fplbase/src/gl3stub_android.c
and have that file switch between either compiling to nothing or including ndk_helper's stub implementation. You'll need to add $(NDK_ROOT)/sources/android
to the include path when building fplbase.
In fplbase/src/gl3stub_android.c
something like this:
#if defined(__ANDROID__)
#if defined(__ANDROID__API__) >= 18
#include "ndk_helper/gl3stub.c"
#endif // defined(__ANDROID__API__) >= 18
#endif // defined(__ANDROID__)
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