2 files changed, 8 insertions, 0 deletions
diff --git a/src/vhdl/libghdl/libghdl.adb b/src/vhdl/libghdl/libghdl.adb
index b0442b9f4..51cd0dd02 100644
--- a/src/vhdl/libghdl/libghdl.adb
+++ b/src/vhdl/libghdl/libghdl.adb
@@ -98,6 +98,11 @@ package body Libghdl is
       return Ghdlcomp.Compile_Analyze_File2 (File (1 .. Len));
    end Analyze_File;
 
+   procedure Set_Exec_Prefix (Prefix : Thin_String_Ptr; Len : Natural) is
+   begin
+      Ghdllocal.Exec_Prefix := new String'(Prefix (1 .. Len));
+   end Set_Exec_Prefix;
+
    Gnat_Version : constant String := "unknown compiler version" & ASCII.NUL;
    pragma Export (C, Gnat_Version, "__gnat_version");
 begin
diff --git a/src/vhdl/libghdl/libghdl.ads b/src/vhdl/libghdl/libghdl.ads
index dbc6b260e..c4edfb9a1 100644
--- a/src/vhdl/libghdl/libghdl.ads
+++ b/src/vhdl/libghdl/libghdl.ads
@@ -25,6 +25,9 @@ package Libghdl is
    --  --ieee). Return 0 for success.
    function Set_Option (Opt : Thin_String_Ptr; Len : Natural) return Integer;
 
+   --  Set the prefix (used to locate libraries).
+   procedure Set_Exec_Prefix (Prefix : Thin_String_Ptr; Len : Natural);
+
    --  To be called before Analyze_File to initialize analysis.
    procedure Analyze_Init;