CODEWITHSUNDEEP
c++cmakeclang
rwols
rwols

Reputation: 3078

Change compiler invocation in CMake

If I'm using the clang compiler in CMake, I would like to prepend the option -cc1 to it for every possible invocation (better: only for a certain target)

I tried using

set(CMAKE_CXX_COMPILER "${CMAKE_CXX_COMPILER} -cc1")

But this wraps the invocation in quotes; consequently this doesn't get recognized as a valid command in my shell.

If I use

set(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER} -cc1)

then I get a semicolon between the clang invocation and the -cc1 option. This also doesn't work.

How do I get CMake to change /path/to/clang into /path/to/clang -cc1 ?

Upvotes: 1

Views: 1773

Answers (2)

rwols
rwols

Reputation: 3078

One workaround for clang-specific needs is to use the -Xclang compiler option, which forces the clang driver to pass the option that follows it to clang -cc1.

For example:

target_compile_options(${target} PUBLIC "-Xclang -include-pch ${output}")

Upvotes: 2

trollkill
trollkill

Reputation: 44

See: cmake CFLAGS CXXFLAGS modification

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -cc1")

For a single target:

target_compile_options(target -cc1)

Upvotes: 0

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