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Changes between Initial Version and Version 1 of Ticket #44125, comment 5

initial	v1
1		`libc++` should be pretty much the only software affected, for one reason: it's not shipped or supported by Apple, but has to be prominently installed into `/usr/lib`. It's a really rare occasion, as most software is bundled within `${prefix}` by MacPorts.
	1	`libc++` should be pretty much the only software affected, for one reason: it's not shipped or supported by Apple, but has to be prominently installed into `/usr/lib`. It's a really rare occasion, as most software is bundled within `${prefix}` by MacPorts. `{prefix}/lib` and `${prefix}/include` are automatically added by MacPorts and `-isysroot` can't shadow them (although this statement might be inaccurate depending on the position of the additional `-I`/`-isystem`/`-L` flags compared to `-isysroot`) so problems like that can't occur.
2	2
3	3	The other thing is that `/Developer/SDKs/...` is and should remain Apple-land only. Installing `libc++` to that place is "dirtying" the SDKs, which sounds like a bad idea to me.