kc3-lang/libjpeg-turbo

2021-10-02T14:26:57

Build: Set CMP0065 NEW (respect ENABLE_EXPORTS) Referring to https://cmake.org/cmake/help/latest/policy/CMP0065.html, CMake 3.3 and earlier automatically added compiler/linker flags such as -rdynamic/-export-dynamic, which caused symbols to be exported from executables. The primary purpose of this is to allow plugins loaded via dlopen() to access symbols from the calling program. libjpeg-turbo does not need this functionality, and enabling it needlessly increases the size of the libjpeg-turbo executables. Setting CMP0065 to NEW when using CMake 3.4 and later prevents CMake from automatically adding the aforementioned compiler/linker flags unless the ENABLE_EXPORTS property is set for a target (or the CMAKE_ENABLE_EXPORTS variable is set, which causes ENABLE_EXPORTS to be set for all targets.) Closes #554