Our llvm does not contain a single top-level library, so consult llvm-config
for the libraries that need to be linked against.

--- clamav-0.100.2/libclamav/c++/configure.ac	2018-09-19 14:29:07.000000000 -0500
+++ clamav-0.100.2/libclamav/c++/configure.ac	2018-10-06 21:45:09.377249158 -0500
@@ -105,7 +105,7 @@
 
     if test "x$llvm_linking" = "xdynamic"; then
         AC_SUBST(LLVMCONFIG_LDFLAGS, [`$llvmconfig --ldflags`])
-        AC_SUBST(LLVMCONFIG_LIBS, [-lLLVM-$llvmver])
+        AC_SUBST(LLVMCONFIG_LIBS, [`$llvmconfig --libs $llvmcomp`])
         AC_SUBST(LLVMCONFIG_LIBFILES, [])
     else
         if test $llvmver_test -ge 350; then
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