Remove superfluous -lm flag.

config.h.in

@@ -15,9 +15,6 @@
 /* Define to 1 if you have the `gcrypt' library (-lgcrypt). */
 #undef HAVE_LIBGCRYPT
 
-/* Define to 1 if you have the `m' library (-lm). */
-#undef HAVE_LIBM
-
 /* Define to 1 if you have the `rt' library (-lrt). */
 #undef HAVE_LIBRT
 

configure

@@ -3262,51 +3262,6 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sqrt in -lm" >&5
-$as_echo_n "checking for sqrt in -lm... " >&6; }
-if ${ac_cv_lib_m_sqrt+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lm  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char sqrt ();
-int
-main ()
-{
-return sqrt ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_m_sqrt=yes
-else
-  ac_cv_lib_m_sqrt=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_sqrt" >&5
-$as_echo "$ac_cv_lib_m_sqrt" >&6; }
-if test "x$ac_cv_lib_m_sqrt" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBM 1
-_ACEOF
-
-  LIBS="-lm $LIBS"
-
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for clock_gettime in -lrt" >&5
 $as_echo_n "checking for clock_gettime in -lrt... " >&6; }
 if ${ac_cv_lib_rt_clock_gettime+:} false; then :

configure.ac

@@ -13,7 +13,6 @@ m4_include([m4_ax_pkg_config.m4])
 AC_PROG_CC
 AC_PROG_INSTALL
 
-AC_CHECK_LIB([m], [sqrt])
 AC_CHECK_LIB([rt], [clock_gettime])
 AC_CHECK_LIB([gcrypt], [gcry_md_open])
 AX_CHECK_ZLIB(, [AC_MSG_ERROR([No zlib found])])