[Mesa-dev] [PATCH 17/17] glsl: Suppress sign-compare warning generated by flex 2.6.1.

[Eric Anholt]

I got the following warning:

src/compiler/glsl/glsl_lexer.cpp:1521:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for ( n = 0; n < max_size && \
src/compiler/glsl/glsl_lexer.cpp:3448:3: note: in expansion of macro ‘YY_INPUT’
   YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
   ^~~~~~~~

and it doesn't look like something from our code.  Just silence it.
---
 src/compiler/glsl/meson.build | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/compiler/glsl/meson.build b/src/compiler/glsl/meson.build
index 26ab4f1c8d3a..12bf545132fd 100644
--- a/src/compiler/glsl/meson.build
+++ b/src/compiler/glsl/meson.build
@@ -199,13 +199,20 @@ files_libglsl_standalone = files(
   'standalone.h',
 )
 
+# flex 2.6.1 generates code with sign-compare warnings
+glsl_lexer_warnings_suppressed = static_library('glsl-lexer',
+  glsl_lexer_cpp,
+  cpp_args : [cpp_vis_args, cpp_msvc_compat_args, '-Wno-sign-compare'],
+  include_directories : [inc_common, inc_compiler, inc_nir],
+)
+
 libglsl = static_library(
   'glsl',
-  [files_libglsl, glsl_parser, glsl_lexer_cpp, ir_expression_operation_h,
+  [files_libglsl, glsl_parser, ir_expression_operation_h,
    ir_expression_operation_strings_h, ir_expression_operation_constant_h],
   c_args : [c_vis_args, c_msvc_compat_args, no_override_init_args],
   cpp_args : [cpp_vis_args, cpp_msvc_compat_args],
-  link_with : libglcpp,
+  link_with : [libglcpp, glsl_lexer_warnings_suppressed],
   include_directories : [inc_common, inc_compiler, inc_nir],
   dependencies : idep_nir,
   build_by_default : false,
-- 
2.15.0