[PATCH] D20261: [compiler-rt] Fix multi-configuration output paths

[Etienne Bergeron via cfe-commits]

etienneb created this revision.
etienneb added a reviewer: rnk.
etienneb added a subscriber: cfe-commits.

When using a multi-configuration build (i.e. MSVC) the output path where
libraries are dropped is incorrect.

Example:
```
C:\src\llvm\examples>d:\src\llvm\build\Release\bin\clang-cl.exe -fsanitize=address test.cc
LINK : fatal error LNK1181: cannot open input file 'd:\src\llvm\build\Release\bin\..\lib\clang\3.9.0\lib\windows\clang_rt.asan-i386.lib'
```

The dropped executable path contains the configuration 'Release':
'd:\src\llvm\build\Release\bin\..\lib\clang\3.9.0\lib\windows\Release\clang_rt.asan-i386.lib'


The variable 'RUNTIME_OUTPUT_DIRECTORY' is used to specify the output directory.
But CMAKE is appending the current configuration (i.e. Debug, Release).

see: https://cmake.org/cmake/help/v3.0/prop_tgt/RUNTIME_OUTPUT_DIRECTORY.html
```
"Multi-configuration generators (VS, Xcode) append a per-configuration subdirectory to the specified directory."
```

To avoid this problem, the configuration specific variable must be set:
'RUNTIME_OUTPUT_DIRECTORY_DEBUG', 'RUNTIME_OUTPUT_DIRECTORY_RELEASE', and so on.

http://reviews.llvm.org/D20261

Files:
  cmake/Modules/AddCompilerRT.cmake

Index: cmake/Modules/AddCompilerRT.cmake
===================================================================
--- cmake/Modules/AddCompilerRT.cmake
+++ cmake/Modules/AddCompilerRT.cmake
@@ -155,10 +155,27 @@
     set_target_link_flags(${libname} ${extra_linkflags_${libname}})
     set_property(TARGET ${libname} APPEND PROPERTY 
                 COMPILE_DEFINITIONS ${LIB_DEFS})
-    set_target_properties(${libname} PROPERTIES
-        ARCHIVE_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
-        LIBRARY_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
-        RUNTIME_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR})
+
+    # For RUNTIME_OUTPUT_DIRECTORY variable, Multi-configuration generators
+    # append a per-configuration subdirectory to the specified directory.
+    # To avoid the appended folder, the configuration specific variable must be
+    # set 'RUNTIME_OUTPUT_DIRECTORY_${CONF}':
+    # ARCHIVE_OUTPUT_DIRECTORY_DEBUG, ARCHIVE_OUTPUT_DIRECTORY_RELEASE, ...
+    if(CMAKE_CONFIGURATION_TYPES)
+      foreach(build_mode ${CMAKE_CONFIGURATION_TYPES})
+        string(TOUPPER "${build_mode}" CONFIG_SUFFIX)
+        set_target_properties(${libname} PROPERTIES
+            "ARCHIVE_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
+            "LIBRARY_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
+            "RUNTIME_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${COMPILER_RT_LIBRARY_OUTPUT_DIR})
+      endforeach()
+    else()
+      set_target_properties(${libname} PROPERTIES
+          ARCHIVE_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
+          LIBRARY_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
+          RUNTIME_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR})
+    endif()
+
     set_target_properties(${libname} PROPERTIES
         OUTPUT_NAME ${output_name_${libname}})
     if(LIB_LINK_LIBS AND ${type} STREQUAL "SHARED")


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