[flang-commits] [PATCH] D158957: [flang][runtime] Avoid dependency on libc++ for `std::__libcpp_verbose_abort`

[Markus Mützel via Phabricator via flang-commits]

mmuetzel updated this revision to Diff 553893.
mmuetzel added a comment.

Looking at the history of `libcxx/include/__verbose_abort` the macro `_LIBCPP_VERBOSE_ABORT` was introduced in the same changeset that made `std::__libcpp_verbose_abort` a weak symbol (from an inlined function).

That might be the point where that dependency of the FortranRuntime to libc++ first appeared.
Let's see if that pleases the CI.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158957/new/

https://reviews.llvm.org/D158957

Files:
  flang/runtime/io-api.cpp


Index: flang/runtime/io-api.cpp
===================================================================
--- flang/runtime/io-api.cpp
+++ flang/runtime/io-api.cpp
@@ -1515,3 +1515,17 @@
 #endif
 
 } // namespace Fortran::runtime::io
+
+#if defined(_LIBCPP_VERBOSE_ABORT)
+// Provide own definition for `std::__libcpp_verbose_abort` to avoid dependency
+// on the version provided by libc++.
+
+void std::__libcpp_verbose_abort(char const* format, ...) {
+  va_list list;
+  va_start(list, format);
+  std::vfprintf(stderr, format, list);
+  va_end(list);
+
+  std::abort();
+}
+#endif


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