Remove implicit iteration from Crosstool

Up until now we allowed implicit iteration, e.g.:

flag_group { flag: '%{some_sequence_variable}' }

From now on, snippet above will raise an error. We require explicit
'iterate_over' message, e.g.:

flag_group {
  iterate_over: 'some_sequence_variable'
  flag: '%{some_sequence_variable}'
}

RELNOTES: Implicit iteration in the CROSSTOOL has been removed, use explicit 'iterate_over' message.
PiperOrigin-RevId: 160871888

1 files changed, 3 insertions, 0 deletions

diff --git a/tools/cpp/CROSSTOOL b/tools/cpp/CROSSTOOL
index 73b83f3d7d..684a5cb7cf 100644
--- a/tools/cpp/CROSSTOOL
+++ b/tools/cpp/CROSSTOOL
@@ -680,12 +680,15 @@ toolchain {
       action: 'c++-header-preprocessing'
       action: 'c++-module-compile'
       flag_group {
+        iterate_over: 'quote_include_paths'
         flag: '/I%{quote_include_paths}'
       }
       flag_group {
+        iterate_over: 'include_paths'
         flag: '/I%{include_paths}'
       }
       flag_group {
+        iterate_over: 'system_include_paths'
         flag: '/I%{system_include_paths}'
       }
     }