New comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/24097#issuecomment-680423238

Comment:
If you don't mind, please give me one more test. I can't put down `USE_SYSTEM_LLVM` and built one version with the Void `llvm10` and one with the in-tree, patched llvm9. I ran `xbps-src check julia` for each version. I've pushed a commit on top of your `p7zip` change to build with `USE_SYSTEM_LLVM`.

When built against Void `llvm10`, `check` reports 38552019 pass results, 3 failures, and 352559 broken tests.
When built with the in-tree llvm9, `check` reports 38559013 pass results, 3 failures and 352559 broken tests.

These are the differences:
```
--- llvm09.txt	2020-08-25 22:13:48.687994239 -0400
+++ llvm10.txt	2020-08-25 22:13:48.687994239 -0400
@@ -20,2 +19,2 @@
-    Libdl                           |       64             1        65
-    LinearAlgebra/addmul            |     4338                    4338
+    LinearAlgebra/addmul            |    10620                   10620
+    Libdl                           |       72             1        73
@@ -68 +67 @@
-    abstractarray                   |    54677         24795     79472
+    abstractarray                   |    54967         24795     79762
@@ -74 +73 @@
-    bitarray                        |   913624                  913624
+    bitarray                        |   914096                  914096
@@ -99 +98 @@
-    env                             |      191                     191
+    env                             |      192                     192
@@ -123 +122 @@
-    loading                         |   159280                  159280
+    loading                         |   145198                  145198
@@ -127 +126 @@
-    misc                            |  1280984                 1280984
+    misc                            |  1280992                 1280992
@@ -140 +139 @@
-    ranges                          | 12109662        327691  12437353
+    ranges                          | 12109689        327691  12437380
@@ -177 +176 @@
-  Overall                           | 38559013     3  352559  38911575
+  Overall                           | 38552019     3  352559  38904581
```

I'm not sure why the total number of tests is different, but it sure seems like Julia is generally doing what it expects with the Void `llvm10`.

If you can identify a problem caused by `llvm10`, we'll stick with the vendored version in https://github.com/void-linux/void-packages/pull/24097/commits/026635864dd593504e8f2a02d188a421685467e2 and call it quits. However, if everything seems to work as you expect with `llvm10`, I prefer building against the Void package. You've noted before that LLVM takes a long time to build, and builder resources are valuable. Adding all of this extra time just to support Julia is a hard sell unless absolutely necessary.