Add Extra Compiler Flags in CMake workflow

CMake
1

Hi

I just started working with CMake (was previously using Projucer) and I’m struggling to find out how to add extra compiler/linker options.

In Producer you could click on an exporter and there were edit boxes to add ‘Extra Compiler Flags’ and ‘Extra Linker Flags’

I’ve tried adding target_compile_options(Gain PRIVATE -fPIC) but I’m still getting linker errors saying I need to ‘recompile with -fPIC’

Full error message:
[build] /usr/bin/ld: images/libGainBinaryData.a(BinaryData1.cpp.o): relocation R_X86_64_PC32 against symbol `_ZN10BinaryData14background_pngE’ can not be used when making a shared object; recompile with -fPIC

This VST3/Standalone project was compiling without any issues before I tried to add a background image to my project. I’m not sure what difference that makes though.

Any help will be much appreciated.
–Ian

2

Rather than dealing directly with compiler flags, it’s more idiomatic to set the POSITION_INDEPENDENT_CODE property on each target that requires it:

set_target_properties(myplugin PROPERTIES POSITION_INDEPENDENT_CODE ON)

Note that the plugin wrappers, shared code target, and binary data targets will all require this property to be set.

3

Thanks reuk, that worked perfectly.
–Ian