[libc++] [CMake] Link with /nodefaultlibs on Windows
Summary:
This patch attempts to fix the libc++ build/link so that it doesn't use an default C++ libraries on Windows. This is needed to prevent linking to MSVC's STL library.
Additionally this patch changes libc++ so that it is always linked with the non-debug DLL's (e.g. `/MD`). This is needed so that the test suite can correctly link the same libraries without needing to know which configuration `c++.dll` was linked with.
Reviewers: compnerd, rnk, majnemer, kimgr, awson, halyavin, smeenai
Subscribers: cfe-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28441
llvm-svn: 292001
diff --git a/libcxx/lib/CMakeLists.txt b/libcxx/lib/CMakeLists.txt
index cc3ed16..f83051f 100644
--- a/libcxx/lib/CMakeLists.txt
+++ b/libcxx/lib/CMakeLists.txt
@@ -104,6 +104,17 @@
endif()
add_link_flags_if_supported(-nodefaultlibs)
+if (LIBCXX_TARGETING_MSVC)
+ add_compile_flags(/Zl)
+ add_link_flags(/nodefaultlib)
+ add_library_flags(ucrt) # Universal C runtime
+ add_library_flags(vcruntime) # C++ runtime
+ add_library_flags(msvcrt) # C runtime startup files
+ # Required for standards-complaint wide character formatting functions
+ # (e.g. `printfw`/`scanfw`)
+ add_library_flags(iso_stdio_wide_specifiers)
+endif()
+
if (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
if (NOT DEFINED LIBCXX_LIBCPPABI_VERSION)
set(LIBCXX_LIBCPPABI_VERSION "2") # Default value
