Doubt regarding propagation of dependencies for static libraries

Usage
1

My question is simple (NOTE: Not sure it matters a lot but I am compiling against emscripten hence using emcmake and emmake)

So basically I have 3 PROJECTS (A B C)

  1. I have libC.a
  2. For B I am doing
add_library(B STATIC 
   source files
)

# Specify include directories for this library’s headers (for propagation)
target_include_directories(B PUBLIC 
    source headers
)

target_link_libraries(B PUBLIC 
   C
)

Q1) Now my first question is about symbols. I guess I should be able to find symbols present in C in B too ?

nm libB.a | grep "symbol_from_C"
  1. Now when I am trying to build A that links with B
target_link_libraries(A PUBLIC B

Q2) Now here I run emcmake and emmake … which gives me an error saying I have undefined symbols. Now these symbols should technically be present in C and so I am curious if the dependency of C has not reached A through B ?

I am linking everything through PUBLIC, so not sure anything is wrong there. I’ve been using target_link_libraries etc since quite some time without understanding how these dependencies propoagate.

Also I first thought the link.txt for B would show us info on C too but that just has

emar qc libB.a xx.cpp.o (basically source object files)
/emranlib libB.a

So even this doesn’t show me info on C. I am really confused how these can be propagated ahead to A.