Implement jroelofs's suggestions. I now use
`-DLLVM_SOURCE=path/to/llvm-source-root`. The error message produced my CMake
is also more informative.
http://reviews.llvm.org/D5836
Files:
CMakeLists.txt
www/index.html
Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -46,7 +46,9 @@
set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
else()
- message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined")
+ message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
+ "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
+ "or -DLLVM_SOURCE=path/to/llvm-source-root.")
endif()
if(EXISTS ${LLVM_CMAKE_PATH})
Index: www/index.html
===================================================================
--- www/index.html
+++ www/index.html
@@ -96,6 +96,16 @@
linux you may need -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++</code></li>
<li><code>make</code></li>
</ul>
+ <p> By default CMake uses <code>llvm-config</code> to locate the required
+ LLVM sources. If CMake cannot find <code>llvm-config</code> then you must
+ configure CMake using either of the following options.
+ </p>
+ <ul>
+ <li><code>-DLLVM_CONFIG=path/to/llvm-config</code></li>
+ <li><code>-DLLVM_PATH=path/to/llvm-source-root</code></li>
+ </ul>
+
+ </p>
<p>To run the tests:</p>
<ul>
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