m4/fp_merge_objects_supports_response_files.m4

   1 # FP_MERGE_OBJECTS_SUPPORTS_RESPONSE_FILES
   2 # --------------------
   3 # See if whether we are using a version of the merge objects tool which supports response files.
   4 AC_DEFUN([FP_MERGE_OBJECTS_SUPPORTS_RESPONSE_FILES], [
   5     AC_MSG_CHECKING([whether $LD supports response files])
   6     echo 'int funA(int x) {return x;}' > conftesta.c
   7     echo 'int funB(int x) {return x;}' > conftestb.c
   8     "$CC" -c -o conftesta.o conftesta.c > /dev/null 2>&1
   9     "$CC" -c -o conftestb.o conftestb.c > /dev/null 2>&1
  10     printf -- "-o\nconftest.o\nconftesta.o\nconftestb.o\n" > args.txt
  11     "$MergeObjsCmd" "$MergeObjsArgs" @args.txt > /dev/null 2>&1
  12     if ("$NM" conftest.o | grep "funA" > /dev/null 2>&1) && ("$NM" conftest.o | grep "funB" > /dev/null 2>&1)
  13     then
  14         MergeObjsSupportsResponseFiles=YES
  15         AC_MSG_RESULT([yes])
  16     else
  17         MergeObjsSupportsResponseFiles=NO
  18         AC_MSG_RESULT([no])
  19     fi
  20     rm -f conftesta.c conftestb.c conftesta.o conftestb.o conftest.o args.txt
  21     AC_SUBST(MergeObjsSupportsResponseFiles)
  22 ])