Compile error：use of undeclared identifier 'rindex'

[Chris-166]

chris@chris-166:~/Projects/ros2-android/src$ colcon build --packages-select uncrustify_vendor
Starting >>> uncrustify_vendor
--- stderr: uncrustify_vendor                            
/home/chris/Projects/ros2-android/src/build/uncrustify_vendor/uncrustify-0.72.0-prefix/src/uncrustify-0.72.0/src/log_rules.cpp:51:12: error: use of undeclared identifier 'rindex'
   where = rindex(func, ':');
           ^
1 error generated.
gmake[5]: *** [CMakeFiles/uncrustify.dir/build.make:797: CMakeFiles/uncrustify.dir/src/log_rules.cpp.o] Error 1
gmake[5]: *** Waiting for unfinished jobs....
gmake[4]: *** [CMakeFiles/Makefile2:1048: CMakeFiles/uncrustify.dir/all] Error 2
gmake[3]: *** [Makefile:166: all] Error 2
gmake[2]: *** [CMakeFiles/uncrustify-0.72.0.dir/build.make:89: uncrustify-0.72.0-prefix/src/uncrustify-0.72.0-stamp/uncrustify-0.72.0-build] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:140: CMakeFiles/uncrustify-0.72.0.dir/all] Error 2
gmake: *** [Makefile:149: all] Error 2
---
Failed   <<< uncrustify_vendor [0.68s, exited with code 2]

Summary: 0 packages finished [1.12s]
  1 package failed: uncrustify_vendor
  1 package had stderr output: uncrustify_vendor

1. Version or commit hash
   commit ec8f8b4 (HEAD -> humble, tag: 2.0.2, origin/humble)
2. Compilation environment：22.04.1-Ubuntu

[clalancette]

So this is a bit of a tricky situation.

The immediate cause of the failure is that the Android libc likely doesn't have rindex.

But really, we shouldn't be compiling this particular package on Android at all, as you want to compile this on the host. We just don't have a good way to express that in our package.xml.

For now, I'm going to mark this as 'backlog' since Android isn't a supported platform.

[Chris-166]

Can I switch the branch from humble to galactic to temporarily work around this issue?

[clalancette]

Can I switch the branch from humble to galactic to temporarily work around this issue?

I doubt that will make a difference, as you'll be in a similar situation.

[NicolARun06]

@Chris-166 I met the same issue, and I modified workspace/src/build/uncrustify_vendor/uncrustify-0.72.0-prefix/src/uncrustify-0.72.0/src/log_rules.cpp:51 .
from: where = rindex(func, ':');
to: where = strrchr(func, ':');

after that, the package 'uncrustify_vendor' could be built sucessfully...