How can I remove the file extension from the object name in the build step?

Question

CMAKE_<LANG>_COMPILE_OBJECT is a variable to set compile rules.

set("<CMAKE_MY_COMPILER> <DEFINES> <INCLUDES> -o <OBJECT> -c <FLAGS> <SOURCE>")

This variable is set in CMake<LANG>Information.cmake. The source file is build and produces an object file build/hello_world.o. CMake is expecting the compiler to produce a different object name.

[ 95%] Building object CMakeFiles/hello_world.dir/src/hello_world.my.o
[100%] Linking executable hello_world
[100%] Built target hello_world

How can I remove the source file extension my from the object name in the build step?

Have you tried modifying the variable? Have you looked into using CMake's `string(REGEX ... )` [command](https://cmake.org/cmake/help/v3.12/command/string.html#regular-expressions) to manipulate the contents of this variable? — Kevin, Sep 17 '19 at 18:39
this is not a cached variable nor a global variable. I don't think I have access to it. — linuxUser123, Sep 17 '19 at 21:37

score 0 · Accepted Answer · answered Aug 05 '20 at 20:41

0

Set the following variable:

set(CMAKE_<LANG>_OUTPUT_EXTENSION_REPLACE 1)

I set this in the file CMakeLANGInformation.cmake for a new cmake language.

answered Aug 05 '20 at 20:41

Patrick

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Hi Patrick, I cannot find this variable in doc, is this an internal feature ? – Prateek Khandelwal Jan 06 '22 at 04:03
It is [here](https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_OUTPUT_EXTENSION.html). Appending _REPLACE does what you would expect. – Patrick Jan 06 '22 at 15:17

How can I remove the file extension from the object name in the build step?

1 Answers1