X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Facosl.m4;h=66cbd6cd9e583dc6eb031cde53812a38b24729a2;hb=db2ebe9d04c394f51b2b0f4306c9f9a79959b1da;hp=0e57df5b25e1a45f7277166ed61c15d09d12cdb0;hpb=73e329f11142c2804e42825e1590041d68dbb6e9;p=gnulib.git

diff --git a/m4/acosl.m4 b/m4/acosl.m4
index 0e57df5b2..66cbd6cd9 100644
--- a/m4/acosl.m4
+++ b/m4/acosl.m4
@@ -1,4 +1,4 @@
-# acosl.m4 serial 1
+# acosl.m4 serial 2
 dnl Copyright (C) 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -54,7 +54,16 @@ AC_DEFUN([gl_FUNC_ACOSL],
     AC_LIBOBJ([acosl])
     AC_REQUIRE([gl_FUNC_ASINL])
     AC_REQUIRE([gl_FUNC_SQRTL])
-    ACOSL_LIBM="$ASINL_LIBM $SQRTL_LIBM"
+    dnl Append $ASINL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
+    case " $ACOSL_LIBM " in
+      *" $ASINL_LIBM "*) ;;
+      *) ACOSL_LIBM="$ACOSL_LIBM $ASINL_LIBM" ;;
+    esac
+    dnl Append $SQRTL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
+    case " $ACOSL_LIBM " in
+      *" $SQRTL_LIBM "*) ;;
+      *) ACOSL_LIBM="$ACOSL_LIBM $SQRTL_LIBM" ;;
+    esac
   fi
   AC_SUBST([ACOSL_LIBM])
 ])