Peter Scheibel f1f94ad31a Externals with merged prefixes (#22653) ... We remove system paths from search variables like PATH and from -L options because they may contain many packages and could interfere with Spack-built packages. External packages may be installed to prefixes that are not actually system paths but are still "merged" in the sense that many other packages are installed there. To avoid conflicts, this PR places all external packages at the end of search paths.		2021-05-22 11:51:20 -07:00
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spack	Externals with merged prefixes (#22653)	2021-05-22 11:51:20 -07:00