Remove possibility to compile with specific glibc

Option is broken for its original testing purposes.  Furthermore it
even loading with the target glibc it is somehow still affected by
system's glibc, hence the option is unrealiable.  Therefore let's
remove it.

Signed-off-by: Giuliano Belinassi <[email protected]>

configure.ac

@@ -263,12 +263,6 @@ AC_DEFINE_UNQUOTED([LD_LINUX], ["$_LD_LINUX"],
 AM_CONDITIONAL([CPU_X86_64],  [test "$_PROC" == "x86_64"])
 AM_CONDITIONAL([CPU_PPC64LE], [test "$_PROC" == "powerpc64le"])
 
-# Use the glibc versions installed on path
-AC_ARG_WITH([glibc],
-AS_HELP_STRING([--with-glibc=GLIBC_PATH],[Use the glibc installed on GLIBC_PATH, where the .so file is present]),
-[AC_SUBST([AM_LDFLAGS], ["-Wl,--dynamic-linker=$with_glibc/$_LD_LINUX -Wl,--rpath=$with_glibc/"])],
-[])
-
 # Check if -fpatchable-function-entry=$ULP_NOPS_LEN,$RE_NOPS_LEN works
 # correctly.
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
@@ -278,6 +272,9 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
   [patchable_works=yes],
   [patchable_works=no])
 
+# Fix some problems with the Makefiles expecting a default value for AM_LDFLAGS
+AC_SUBST([AM_LDFLAGS], [""])
+
 AS_IF([test "x$patchable_works" == "xno"],
 AC_MSG_ERROR(
 [The -fpatchable-functions-entry flag of your C compiler does not work correctly]))