meson: force inclusion of inttypes.h for glcpp with msvc

Because we provide a copy if MSVC doesn't, and we need it to make flex
do what we want.

Acked-by: Kristian H. Kristensen <[email protected]>

1 files changed, 12 insertions, 2 deletions

diff --git a/src/compiler/glsl/glcpp/meson.build b/src/compiler/glsl/glcpp/meson.build
index 5a665444f06..90046477108 100644
--- a/src/compiler/glsl/glcpp/meson.build
+++ b/src/compiler/glsl/glcpp/meson.build
@@ -35,13 +35,23 @@ glcpp_lex = custom_target(
   command : [prog_flex, '-o', '@OUTPUT@', '@INPUT@'],
 )
 
+_extra_args = []
+if cpp.get_id() == 'msvc'
+  # Flex relies on __STDC_VERSION__>=199901L to decide when to include C99
+  # inttypes.h.  We always have inttypes.h available with MSVC (either the one
+  # bundled with MSVC 2013, or the one we bundle ourselves), but we can't just
+  # define __STDC_VERSION__ without breaking stuff, as MSVC doesn't fully
+  # support C99.  There's also no way to premptively include stdint.
+  _extra_args += '-FIinttypes.h'
+endif
+
 libglcpp = static_library(
   'glcpp',
   [glcpp_lex, glcpp_parse, files('glcpp.h', 'pp.c')],
   dependencies : idep_mesautil,
   include_directories : [inc_common],
-  c_args : [c_vis_args, no_override_init_args, c_msvc_compat_args],
-  cpp_args : [cpp_vis_args, cpp_msvc_compat_args],
+  c_args : [c_vis_args, no_override_init_args, c_msvc_compat_args, _extra_args],
+  cpp_args : [cpp_vis_args, cpp_msvc_compat_args, _extra_args],
   build_by_default : false,
 )