Add new debug_prefix_map_pwd_is_dot CROSSTOOL feature

This feature sets `-fdebug_prefix_map=$PWD=.` as an argument to Clang
in order to standardize the paths to debug symbols (by making them
relative to the exec root).

Note that this needs to be implemented inside wrapped_clang instead
of as an argument to the action itself for caching purposes, as PWD
can change based on the action's executor.

PiperOrigin-RevId: 206019016

1 files changed, 180 insertions, 0 deletions

diff --git a/tools/osx/crosstool/CROSSTOOL.tpl b/tools/osx/crosstool/CROSSTOOL.tpl
index 6686ce0e69..0e2964393d 100644
--- a/tools/osx/crosstool/CROSSTOOL.tpl
+++ b/tools/osx/crosstool/CROSSTOOL.tpl
@@ -201,6 +201,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -1830,6 +1848,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -3475,6 +3511,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -5123,6 +5177,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -6798,6 +6870,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -8443,6 +8533,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -10076,6 +10184,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -11712,6 +11838,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -13375,6 +13519,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {
@@ -15009,6 +15171,24 @@ toolchain {
     }
   }
   feature {
+    name: "debug_prefix_map_pwd_is_dot"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "linkstamp-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "DEBUG_PREFIX_MAP_PWD=."
+      }
+    }
+  }
+  feature {
     name: "no_dsym_create_zip"
   }
   feature {