mk: Try to fix nightlies again #33472
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Looks like the real bug on nightlies is that the `llvm-pass` run-make test is not actually getting the value of `LLVM_CXXFLAGS` correct. Namely, it's blank! Now the only change rust-lang#33093 which actually affected this is that the argument `$(LLVM_CXXFLAGS_$(2))` was moved up from a makefile rule into the definition of a variable. Sounds innocuous? Turns out the variable this was moved into is defined with `:=`, which means that it's not recursively expanded, which basically means that it's expanded immediately. Unfortunately part of this expansion involves running `llvm-config`, which doesn't exist at the start of distcheck build! This didn't show up on the bots because they run `make` *then* `make check`, and the first step builds llvm-config so the next time `make` is loaded everything is available. The distcheck bots, however, run just a plain `distcheck` so `make` doesn't exist ahead of time. You can see this in action where the distcheck bots start out with a bunch of "llvm-config not found" error messages. This commit just changes a few variables to be defined with `=` which essentially means they're lazily expanded. I did not run a full distcheck locally, but this makes the initial "llvm-config not found" error messages go away so I suspect that this is the fix. Closes rust-lang#33379
|
r? @brson (rust_highfive has picked a reviewer for you, use r? to override) |
|
@bors r+ p=123 |
|
📌 Commit eeb2f6d has been approved by |
bors
added a commit
that referenced
this pull request
May 6, 2016
mk: Try to fix nightlies again Looks like the real bug on nightlies is that the `llvm-pass` run-make test is not actually getting the value of `LLVM_CXXFLAGS` correct. Namely, it's blank! Now the only change #33093 which actually affected this is that the argument `$(LLVM_CXXFLAGS_$(2))` was moved up from a makefile rule into the definition of a variable. Sounds innocuous? Turns out the variable this was moved into is defined with `:=`, which means that it's not recursively expanded, which basically means that it's expanded immediately. Unfortunately part of this expansion involves running `llvm-config`, which doesn't exist at the start of distcheck build! This didn't show up on the bots because they run `make` *then* `make check`, and the first step builds llvm-config so the next time `make` is loaded everything is available. The distcheck bots, however, run just a plain `distcheck` so `make` doesn't exist ahead of time. You can see this in action where the distcheck bots start out with a bunch of "llvm-config not found" error messages. This commit just changes a few variables to be defined with `=` which essentially means they're lazily expanded. I did not run a full distcheck locally, but this makes the initial "llvm-config not found" error messages go away so I suspect that this is the fix. Closes #33379 (hopefully)
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Looks like the real bug on nightlies is that the
llvm-passrun-make test isnot actually getting the value of
LLVM_CXXFLAGScorrect. Namely, it's blank!Now the only change #33093 which actually affected this is that the argument
$(LLVM_CXXFLAGS_$(2))was moved up from a makefile rule into the definition ofa variable. Sounds innocuous?
Turns out the variable this was moved into is defined with
:=, which meansthat it's not recursively expanded, which basically means that it's expanded
immediately. Unfortunately part of this expansion involves running
llvm-config, which doesn't exist at the start of distcheck build!This didn't show up on the bots because they run
makethenmake check, andthe first step builds llvm-config so the next time
makeis loaded everythingis available. The distcheck bots, however, run just a plain
distchecksomakedoesn't exist ahead of time. You can see this in action where thedistcheck bots start out with a bunch of "llvm-config not found" error messages.
This commit just changes a few variables to be defined with
=whichessentially means they're lazily expanded. I did not run a full distcheck
locally, but this makes the initial "llvm-config not found" error messages go
away so I suspect that this is the fix.
Closes #33379 (hopefully)