Compile your code with -fPIC or -fPIE about cmakepchcompiler HOT 4 CLOSED

There some explicit handling for -fPIC introduced by @mick-p1982 and POSITION_INDEPENDENT_CODE property is not carried over to PCH target for some reason.

@mick-p1982 Do you remember what was the issue with POSITION_INDEPENDENT_CODE?

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This is somewhat similar (but not duplicate) to #23. We need to ensure that we properly copy CMAKE_CXX_COMPILE_OPTIONS_PIC to CXXPCH in order to make PIC generation working for PCH.
I try to work on it in near future.

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The high-level feature CMake offers for PIC just don't get processed normally... CMake must add it later in the pipeline. I've never heard of PIE; but I'm sure it can be added. I'm not offering. The PIC variable is injected near the bottom of the main script file.

I should add that the feature isn't about setting the "-fPIC" flag manually. It's about the platform-independent feature provided by CMake.

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Fixed in e17969b

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