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   1 From: Richard Purdie <richard.purdie@linuxfoundation.org>
   2 Subject: [PATCH 11/12] ltmain.in: Handle prefix-map compiler options correctly
   3
   4 If lto is enabled, we need the prefix-map variables to be passed to the linker.
   5 Add these to the list of options libtool passes through.
   6
   7 Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
   8
   9 Upstream-Status: Submitted [https://lists.gnu.org/archive/html/libtool-patches/2021-10/msg00019.html]
  10
  11 Index: libtool-2.4.6/build-aux/ltmain.in
  12 ===================================================================
  13 --- libtool-2.4.6.orig/build-aux/ltmain.in
  14 +++ libtool-2.4.6/build-aux/ltmain.in
  15 @@ -5424,9 +5424,10 @@ func_mode_link ()
  16        # --sysroot=*          for sysroot support
  17        # -O*, -g*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
  18        # -stdlib=*            select c++ std lib with clang
  19 +      # -f*-prefix-map*      needed for lto linking
  20        -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
  21        -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
  22 -      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*)
  23 +      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*|-f*-prefix-map*)
  24          func_quote_for_eval "$arg"
  25         arg=$func_quote_for_eval_result
  26          func_append compile_command " $arg"