# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1524580549 14400
# Node ID 537b732926fb773f7796690a530c33b9439a76a0
# Parent  65b4b04600c67432c5f11b62635bc39a8770a64a
fix logic error in OCTAVE_CONFIG_LIB (bug #53736)

* acinclude.m4 (OCTAVE_CHECK_LIB): Don't allow PACKAGE_LIBS to be set
if the library is not found.  Previously this could happen in various
ways, including if the macro was used with an empty warning string.

diff -r 65b4b04600c6 -r 537b732926fb m4/acinclude.m4
--- a/m4/acinclude.m4	Mon Apr 23 17:05:43 2018 -0700
+++ b/m4/acinclude.m4	Tue Apr 24 10:35:49 2018 -0400
@@ -838,7 +838,11 @@
           warn_$1=
           AC_DEFINE([HAVE_]m4_toupper([$1]), 1,
             [Define to 1 if $2 is available.])], [$8])
+      else
+        m4_toupper([$1])_LIBS=
       fi
+    else
+      m4_toupper([$1])_LIBS=
     fi
     m4_ifnblank([$6], [AC_LANG_POP($6)])
     CPPFLAGS="$ac_octave_save_CPPFLAGS"
@@ -855,7 +859,6 @@
   AC_SUBST(m4_toupper([$1])_LIBS)
   if test -n "$warn_$1"; then
     OCTAVE_CONFIGURE_WARNING([warn_$1])
-    m4_toupper([$1])_LIBS=
   fi
 ])
 dnl