CODEWITHSUNDEEP
cmake
João Neto
João Neto

Reputation: 1841

using set_source_files_properties with glob_recurse

I want to change the LANGUAGE property of all .c files to be CXX so that they're compiled with g++. However, when I use the result of a GLOB_RECURSE in set_source_files_properties, it seems to have no effect.

I have the following in my CMakeLists.txt and its output is not making sense to me.

get_source_file_property(property_before ${CMAKE_SOURCE_DIR}/examples/one/file.c LANGUAGE)
message(STATUS ${property_before})
# OUTPUT: NOTFOUND

file(GLOB_RECURSE c_sources "*.c")
foreach(c_file ${c_sources})
    message(STATUS ${c_file})
    # examples/one/file.c is included in the list of files
endforeach(c_file)
set_source_files_properties(c_sources PROPERTIES LANGUAGE CXX)

get_source_file_property(property_after ${CMAKE_SOURCE_DIR}/examples/one/file.c LANGUAGE)
message(STATUS ${property_after})
# OUTPUT: NOTFOUND

set_source_files_properties(${CMAKE_SOURCE_DIR}/examples/one/file.c PROPERTIES LANGUAGE CXX)
get_source_file_property(property_after_manual ${CMAKE_SOURCE_DIR}/examples/one/file.c LANGUAGE)
message(STATUS ${property_after_manual})
# OUTPUT: CXX

Source tree is something like:

.
├── CMakeLists.txt
├── examples # that use my library
│   ├── one
│   │   ├── file.c
│   │   └── CMakeLists.txt
│   ├── …
│   └── CMakeLists.txt
├── include # my library headers
│   ├── header1.h
│   ├── header2.h
│   └── …
├── src
│   ├── src1.cpp
│   ├── src2.cpp
│   └── …
└── test #tests
    └── …

Pretty sure I'm doing something dumb and it's an easy fix, but I've wasted over an hour and I didn't find the issue. I really don't want to add manually all the .c files :-)

Upvotes: 1

Views: 3049

Answers (1)

bk138
bk138

Reputation: 3088

You need to expand the c_sources variable like so: set_source_files_properties(${c_sources} PROPERTIES LANGUAGE CXX), like you already do it correctly in the foreach above.

Upvotes: 2

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