--- jbig2dec-0.12/configure.ac.orig	2016-01-05 16:06:21.787376199 +0100
+++ jbig2dec-0.12/configure.ac	2016-01-05 16:55:48.807251688 +0100
@@ -45,11 +45,11 @@
     LDFLAGS="$LDFLAGS -L$ac_cv_want_libpng/lib"
   fi
   dnl libpng requires pow() which may be in libm
-  AC_SEARCH_LIBS([pow], [m])
+  AC_CHECK_FUNC([pow], [M_LIB=], [AC_CHECK_LIB([m], [pow], [M_LIB="-lm"])])
   AC_CHECK_LIB([png], [png_create_write_struct], [
     AC_CHECK_LIB([z], [deflate], [
       AC_DEFINE(HAVE_LIBPNG, 1, [Define if libpng is available (-lpng)])
-      PNG_LIBS="-lpng -lz"
+      PNG_LIBS="-lpng -lz $M_LIB"
       AC_LIBOBJ([jbig2_image_png])
       have_libpng="yes"
     ])