djview: don't mess with CFLAGS on --enable-debug

srcpkgs/djview/patches/keep-debug-symbol.patch

@@ -0,0 +1,28 @@
+Index: djview4-4.12/config/acinclude.m4
+===================================================================
+--- djview4-4.12.orig/config/acinclude.m4
++++ djview4-4.12/config/acinclude.m4
+@@ -73,23 +73,6 @@ AC_DEFUN([AC_CXX_OPTIMIZE],[
+         [ac_debug=$enableval],[ac_debug=no])
+    OPTS=
+    AC_SUBST(OPTS)
+-   saved_CXXFLAGS="$CXXFLAGS"
+-   saved_CFLAGS="$CFLAGS"
+-   CXXFLAGS=
+-   CFLAGS=
+-   for opt in $saved_CXXFLAGS ; do
+-     case $opt in
+-       -g*) test $ac_debug != no && OPTS="$OPTS $opt" ;;
+-       -O*) ;;
+-       *) CXXFLAGS="$CXXFLAGS $opt" ;;
+-     esac
+-   done
+-   for opt in $saved_CFLAGS ; do
+-     case $opt in
+-       -O*|-g*) ;;
+-       *) CFLAGS="$CFLAGS $opt" ;;
+-     esac
+-   done
+    if test x$ac_debug = xno ; then
+      OPTS=-DNDEBUG
+      AC_CHECK_CXX_OPT([-Wall],[OPTS="$OPTS -Wall"])