Description: Allow setting path for LLC/OPT during configuration
 Patch configure.ac to allow us to modify the path for LLC/OPT during
 configuration.
Author: Ilias Tsitsimpis <iliastsi@debian.org>

Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -600,14 +600,18 @@ AC_SUBST([ClangCmd])
 dnl ** Which LLVM llc to use?
 dnl --------------------------------------------------------------
 AC_ARG_VAR(LLC,[Use as the path to LLVM's llc [default=autodetect]])
-FIND_LLVM_PROG([LLC], [llc], [$LlvmMinVersion], [$LlvmMaxVersion])
+if test -z "$LLC"; then
+  FIND_LLVM_PROG([LLC], [llc], [$LlvmMinVersion], [$LlvmMaxVersion])
+fi
 LlcCmd="$LLC"
 AC_SUBST([LlcCmd])
 
 dnl ** Which LLVM opt to use?
 dnl --------------------------------------------------------------
 AC_ARG_VAR(OPT,[Use as the path to LLVM's opt [default=autodetect]])
-FIND_LLVM_PROG([OPT], [opt], [$LlvmMinVersion], [$LlvmMaxVersion])
+if test -z "$OPT"; then
+  FIND_LLVM_PROG([OPT], [opt], [$LlvmMinVersion], [$LlvmMaxVersion])
+fi
 OptCmd="$OPT"
 AC_SUBST([OptCmd])
 
Index: b/distrib/configure.ac.in
===================================================================
--- a/distrib/configure.ac.in
+++ b/distrib/configure.ac.in
@@ -145,14 +145,18 @@ LlvmMaxVersion=@LlvmMaxVersion@
 dnl ** Which LLVM llc to use?
 dnl --------------------------------------------------------------
 AC_ARG_VAR(LLC,[Use as the path to LLVM's llc [default=autodetect]])
-FIND_LLVM_PROG([LLC], [llc], [$LlvmMinVersion], [$LlvmMaxVersion])
+if test -z "$LLC"; then
+  FIND_LLVM_PROG([LLC], [llc], [$LlvmMinVersion], [$LlvmMaxVersion])
+fi
 LlcCmd="$LLC"
 AC_SUBST([LlcCmd])
 
 dnl ** Which LLVM opt to use?
 dnl --------------------------------------------------------------
 AC_ARG_VAR(OPT,[Use as the path to LLVM's opt [default=autodetect]])
-FIND_LLVM_PROG([OPT], [opt], [$LlvmMinVersion], [$LlvmMaxVersion])
+if test -z "$OPT"; then
+  FIND_LLVM_PROG([OPT], [opt], [$LlvmMinVersion], [$LlvmMaxVersion])
+fi
 OptCmd="$OPT"
 AC_SUBST([OptCmd])
 
