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diff libinterp/corefcn/oct-tex-lexer.in.ll @ 21023:ec532a439c6f

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rework method of disabling warnings from GCC * configure.ac: Check for GCC's #pragma GCC diagnostic feature. * libinterp/module.mk, libinterp/corefcn/module.mk, libinterp/parse-tree/module.mk: Eliminate separate libraries for TeX and Octave parsers. * oct-tex-lexer.in.ll, oct-tex-parser.in.yy, lex.ll, oct-parse.in.yy: Use GCC #pragma GCC diagnostic feature to more selectively disable warnings in generated code. * libgui/module.mk (rcc-command): Use GCC #pragma GCC diagnostic feature to more selectively disable warnings in generated code.
author John W. Eaton <jwe@octave.org>
date Thu, 31 Dec 2015 17:06:36 -0500
parents e3c0fee87493
children 40de9f8f23a6
line wrap: on
line diff
--- a/libinterp/corefcn/oct-tex-lexer.in.ll	Thu Dec 31 13:45:43 2015 -0500
+++ b/libinterp/corefcn/oct-tex-lexer.in.ll	Thu Dec 31 17:06:36 2015 -0500
@@ -20,6 +20,24 @@
 
 */
 
+%top {
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
+// This one needs to be global.
+#pragma GCC diagnostic ignored "-Wunused-function"
+
+// Disable this warning for code that is generated by flex, including
+// pattern rules.  Push the current state so we can restore the warning
+// state prior to functions we define at the bottom of the file.
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wold-style-cast"
+#endif
+
+}
+
 %option prefix = "octave_tex_"
 %option noyywrap
 %option reentrant
@@ -29,13 +47,6 @@
 %option noyyrealloc
 %option noyyfree
 
-%top {
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-}
-
 %x NUM_MODE
 %x MAYBE_NUM_MODE
 
@@ -171,8 +182,21 @@
     return CH;
   }
 
+%{
+#if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
+// Also disable this warning for functions that is generated by flex
+// after the pattern rules.
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+%}
+
 %%
 
+#if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
+// Restore prevailing warning state for remainder of the file.
+#pragma GCC diagnostic pop
+#endif
+
 void *
 octave_tex_alloc (yy_size_t size, yyscan_t)
 {