[3.0.x] build: use DYLD_LIBRARY_PATH on macOS

cf. https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryUsageGuidelines.html#//apple_ref/doc/uid/TP40001928-SW12

""" When the library name is a filename (that is, when it doesn’t include directory names), the dynamic loader searches for the library in several locations until it finds it, in the following order:

• $LD_LIBRARY_PATH
• $DYLD_LIBRARY_PATH
• The process’s working directory
• $DYLD_FALLBACK_LIBRARY_PATH

When the library name contains at least one directory name, that is, when the name is a pathname (relative or fully qualified), the dynamic loader searches for the library in the following order:

• $DYLD_LIBRARY_PATH using the filename
• The given pathname
• $DYLD_FALLBACK_LIBRARY_PATH using the filename """

Conclusion: DYLD_LIBRARY_PATH on macOS behave like LD_LIBRARY_PATH on Linux but LD_LIBRARY_PATH on macOS has a different behavior than LD_LIBRARY_PATH on Linux, so DYLD_LIBRARY_PATH should be used on macOS. Specially since we can't really control if the library name will include a path or not (relative or absolute).

(cherry picked from commit abbe7f3b) Signed-off-by: Marvin Scholz epirat07@gmail.com

changed milestone to %3.0.17

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• db55aaa0 - build: use DYLD_LIBRARY_PATH on macOS

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