Do not link to -lm if it is not required.

024c4c5d · Sergey Kosukhin · 1f923b07 · 024c4c5d
Commit 024c4c5d authored May 07, 2019 by Sergey Kosukhin
--- a/configure.ac
+++ b/configure.ac
@@ -131,7 +131,7 @@ AC_DEFINE_UNQUOTED([SYSTEM_TYPE],["$ac_cv_build"], [System type])
 AC_SUBST([SYSTEM_TYPE],["$ac_cv_build"])
 #  ----------------------------------------------------------------------
 #  Check for math library
-AC_CHECK_LIB(m, floor)
+AC_SEARCH_LIBS(floor, m)
 #  ----------------------------------------------------------------------
 # Add basic configure options
 ACX_CDI_OPTIONS