[PATCH] D31518: Try to fix the libcxx build with mingw64

[Reid Kleckner via Phabricator via cfe-commits]

rnk created this revision.
Herald added a subscriber: mgorny.

mingw64 has lots of default libs that libc++ and its test programs
should link against.

With this patch, cmake now runs successfully with GCC on Windows.


https://reviews.llvm.org/D31518

Files:
  libcxx/cmake/config-ix.cmake


Index: libcxx/cmake/config-ix.cmake
===================================================================
--- libcxx/cmake/config-ix.cmake
+++ libcxx/cmake/config-ix.cmake
@@ -35,6 +35,11 @@
   elseif (LIBCXX_HAS_GCC_S_LIB)
     list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s)
   endif ()
+  if (MINGW)
+    # Mingw64 requires quite a few "C" runtime libraries in order for basic
+    # programs to link successfully with -nodefaultlibs.
+    list(APPEND CMAKE_REQUIRED_LIBRARIES mingw32 gcc gcc_eh mingwex msvcrt gcc)
+  endif()
   if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)
     set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")
   endif ()


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