pkg: Include CPATH in header search path

Look for the CPATH environment variable when constructing the -I header
search path like GCC does. See
https://gcc.gnu.org/onlinedocs/gcc/Environment-Variables.html.

https://bugs.freedesktop.org/show_bug.cgi?id=99224

1 files changed, 6 insertions, 0 deletions

diff --git a/pkg.c b/pkg.c
index a8a3fcd..bff5c42 100644
--- a/pkg.c
+++ b/pkg.c
@@ -745,6 +745,12 @@ verify_package (Package *pkg)
 
   system_directories = add_env_variable_to_list (system_directories, search_path);
 
+  search_path = g_getenv ("CPATH");
+  if (search_path != NULL)
+    {
+      system_directories = add_env_variable_to_list (system_directories, search_path);
+    }
+
   search_path = g_getenv ("C_INCLUDE_PATH");
   if (search_path != NULL)
     {