chapter-05/recipe-04 not print COMMENT in add_custom_command

[ozdang]

Expected Behavior

print comment "Intermediate BLAS_LAPACK_wrappers target"

Current Behavior

[user]@[system]:/mnt/d/test-code/cmake-cookbook/chapter-05/recipe-04/cxx-example/build$ cmake --build .
[ 16%] Unpacking C++ wrappers for BLAS/LAPACK
Scanning dependencies of target math
[ 16%] Unpacking C++ wrappers for BLAS/LAPACK
[ 33%] Building CXX object deps/CMakeFiles/math.dir/wrap_BLAS_LAPACK/CxxBLAS.cpp.o
[ 50%] Building CXX object deps/CMakeFiles/math.dir/wrap_BLAS_LAPACK/CxxLAPACK.cpp.o
[ 66%] Linking CXX static library libmath.a
[ 66%] Built target math
Scanning dependencies of target linear-algebra
[ 83%] Building CXX object CMakeFiles/linear-algebra.dir/linear-algebra.cpp.o
[100%] Linking CXX executable linear-algebra
[100%] Built target linear-algebra

Possible Solution

target BLAS_LAPACK_wrappers is not referred and not executed because of missing "ALL" keyword

Your Environment

• Version used: Ubuntu 18.04 on WSL2
• Environment name and version (e.g. PHP 5.4 on nginx 1.9.1):
  chapter-05/recipe-04/cxx-example/build/deps$ cmake --version
  cmake version 3.19.20201129-gea21283