build: move library flags from EXTRA_LDFLAGS to LIBS

LIBS is the variable that Autoconf uses to put library flags.  From the
manual of GNU Autoconf (version 2.69):

>  -- Variable: LDFLAGS
>
>      [...]
>
>      This variable's contents should contain options like '-s' and '-L'
>      that affect only the behavior of the linker.  Please see the
>      explanation of 'CFLAGS' for what you can do if an option also
>      affects other phases of the compiler.
>
>      Don't use this variable to pass library names ('-l') to the linker;
>      use 'LIBS' instead.
>
>  -- Variable: LIBS
>
>      '-l' options to pass to the linker.  The default value is empty,
>      but some Autoconf macros may prepend extra libraries to this
>      variable if those libraries are found and provide necessary
>      functions, see *note Libraries::.  'configure' uses this variable
>      when linking programs to test for C, C++, Objective C, Objective
>      C++, Fortran, and Go features.

1 files changed, 4 insertions, 3 deletions

diff --git a/configure b/configure
index 51767d296..1b827922d 100755
--- a/configure
+++ b/configure
@@ -3334,7 +3334,7 @@ else
 $as_echo "yes" >&6; }
 
                 EXTRA_CFLAGS="$EXTRA_CFLAGS $AA_CFLAGS"
-                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $AA_LIBS"
+                LIBS="$LIBS $AA_LIBS"
 
 fi
 
@@ -3350,7 +3350,7 @@ fi
 if test "x$enable_selinux" = "xyes"; then :
 
         HAVE_SELINUX="-DHAVE_SELINUX"
-        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lselinux"
+        LIBS="$LIBS -lselinux"
 
 fi
 
@@ -3612,7 +3612,8 @@ fi
 if test "x$enable_gcov" = "xyes"; then :
 
         HAVE_GCOV="--coverage -DHAVE_GCOV"
-        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lgcov --coverage"
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS --coverage"
+        LIBS="$LIBS -lgcov"
 
 fi