Unable to use LLVM 15.0.6 in sdk v0.29 and 15.0.7 in sdk v0.30

[jpmcb]

Image I'm using:

In v0.29 of the sdk, which uses LLVM 15.0.6 and in v0.30 of the sdk which uses LLVM 15.0.7, users found missing symbols:

readelf -a /*-bottlerocket-linux-musl/sys-root/usr/lib/libunwind.a | grep unw_getcontext

# 0.28.0 output
000000000720  00280000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000a5c  00280000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000b28  00280000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
    40: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND __unw_getcontext
0000000001c4  00240000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000294  00240000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
00000000045c  00240000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
    36: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND __unw_getcontext
     6: 0000000000000000     0 FUNC    GLOBAL HIDDEN     1 __unw_getcontext
     7: 0000000000000000     0 FUNC    WEAK   DEFAULT    1 unw_getcontext

# 0.29.0 output
000000000720  00290000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000a4c  00290000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000b18  00290000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
    41: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND __unw_getcontext
0000000001c4  00250000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
000000000294  00250000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
00000000045c  00250000011b R_AARCH64_CALL26  0000000000000000 __unw_getcontext + 0
    37: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND __unw_getcontext

Notice the final two lines are missing in the v0.29 version of the sdk

GLOBAL HIDDEN     1 __unw_getcontext
     7: 0000000000000000     0 FUNC    WEAK   DEFAULT    1 unw_getcontext

(Shout out to @bcressey for getting this figured out!)

Related to #100

Issue or Feature Request:

Investigate what's going on with the newer versions of LLVM and why we are having trouble using them.

[stmcginnis]

Any idea if this is still an issue with v0.32.0?

[jpmcb]

Likely.

We're still on llvm 14.0.6:

bottlerocket-sdk/hashes/libunwind

Line 1 in 1d0dbe6

# https://github.com/llvm/llvm-project/releases/download/llvmorg-14.0.6/llvm-14.0.6.src.tar.xz

which was downgraded when we last tried to bump llvm for v0.30: #100

If we want to bump llvm, we'll need to pull in the new version and try to figure out what's missing so we can use it with the rest of the sdk.