We're trying to get BGFX to build for Android, following the guide here: https://github.com/Nodrev/bgfx-android-activity as recommended on the BGFX main site.
However, this repository was last updated 3+ years ago, and since then there have been major revisions to the Android NDK structure, meaning all of the library paths are all wrong. We've managed to make some progress, but keep getting stuck on the same error.
What we've tried so far:
- Using various NDK versions from 17 to 25. NDK 21 seems to be the one before the big change in NDK structure but we consistently get an error at some point during the build with each NDK:
'alloca.h' file not found - Using NDK 25, we got various other errors due to incorrect paths, managed to get past those, but this just led us back to the above error.
- Posting a message on the BGFX discussion board, no response.
- We found a message here that appears to describe the problem we're having but the second solution does not work, with error:
error: use of undeclared identifier 'GL_PARAMETER_BUFFER_ARB' ...GL_CHECK(glBindBuffer(GL_PARAMETER_BUFFER_ARB, 0) );
and the first solution doesn't contain enough information to try to replicate it.
The main issue we're having is that it seems there is a variable sysroot which tells the build process where to look for headers and libraries, this points to --sysroot=$(ANDROID_NDK_ROOT)/platforms/android-32/arch-arm in the build script, which does not exist. Setting it to a platform that does exist, e.g. --sysroot=$(ANDROID_SDK_ROOT)/platforms/android-32/ got us as far as the alloc.h error above.
alloca.h is found in \AppData\Local\Android\Sdk\ndk\25.1.8937393\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include so we tried setting sysroot to $(ANDROID_NDK_X86)/sysroot/usr/
which led to the error:
\AppData\Local\Android\Sdk\ndk\25.1.8937393\toolchains\llvm\prebuilt\windows-x86_64/sysroot/usr//include/linux/types.h:21:10: fatal error: 'asm/types.h' file not found
asm/types.h is found in a few places:
ndk\25.1.8937393\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android\asm ndk\25.1.8937393\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\arm-linux-androideabi\asm ndk\25.1.8937393\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\i686-linux-android\asm
but changing sysroot to point to e.g. --sysroot=$(ANDROID_NDK_ARM)/sysroot/usr/include/arm-linux-androidabi gets us back to the alloca.h error again.
This is the error in full:
process_begin: CreateProcess(NULL, uname, ...) failed.
makefile:6: pipe: No error
C:/ProgramData/chocolatey/lib/make/tools/install/bin/make.exe -R -C .build/projects/gmake-android-arm config=debug
make[1]: Entering directory '.../bgfx/.build/projects/gmake-android-arm'
"==== Building bx (debug) ===="
allocator.cpp
In file included from ../../../../bx/src/allocator.cpp:6:
In file included from ../../../../bx/include/bx/allocator.h:9:
../../../../bx/include/bx/bx.h:9:10: fatal error: 'alloca.h' file not found
#include <alloca.h> // alloca
^~~~~~~~~~
1 error generated.
make[2]: *** [bx.make:441: ../../android-arm/obj/Debug/bx/bx/src/allocator.o] Error 1
make[1]: *** [Makefile:17: bx] Error 2
make[1]: Leaving directory '.../bgfx/.build/projects/gmake-android-arm'
make: *** [makefile:69: android-arm-debug] Error 2
We've run out of ideas at this point, would greatly appreciate some help!
