Move LLVM logic to extra cmake module

[frida/frida.git] / cmake / Modules / FindLLVM.cmake

diff --git a/cmake/Modules/FindLLVM.cmake b/cmake/Modules/FindLLVM.cmake
new file mode 100644 (file)
index 0000000..ba2dd15
--- /dev/null
+++ b/cmake/Modules/FindLLVM.cmake
@@ -0,0 +1,32 @@
+find_program(LLVM_CONFIG NAMES llvm-config-3.5 llvm-config)
+
+if(LLVM_CONFIG)
+  execute_process(COMMAND ${LLVM_CONFIG} --version
+       OUTPUT_VARIABLE LLVM_VERSION)
+
+  if(((${LLVM_VERSION} VERSION_LESS 3.6.0)
+               AND (${LLVM_VERSION} VERSION_GREATER 3.5))
+         OR (${LLVM_VERSION} VERSION_EQUAL 3.5))
+
+       execute_process(COMMAND ${LLVM_CONFIG} --cxxflags
+         OUTPUT_VARIABLE LLVM_CFLAGS      OUTPUT_STRIP_TRAILING_WHITESPACE)
+       execute_process(COMMAND ${LLVM_CONFIG} --ldflags
+         OUTPUT_VARIABLE LLVM_LDFLAGS     OUTPUT_STRIP_TRAILING_WHITESPACE)
+       execute_process(COMMAND ${LLVM_CONFIG} --libs
+         OUTPUT_VARIABLE LLVM_LIBS        OUTPUT_STRIP_TRAILING_WHITESPACE)
+       execute_process(COMMAND ${LLVM_CONFIG} --system-libs
+         OUTPUT_VARIABLE LLVM_SYSTEM_LIBS OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+       string(REPLACE -O2 "" LLVM_CFLAGS ${LLVM_CFLAGS})
+       string(REPLACE -fno-exceptions "" LLVM_CFLAGS ${LLVM_CFLAGS})
+       string(REPLACE -fno-rtti "" LLVM_CFLAGS ${LLVM_CFLAGS})
+       string(REPLACE -DNDEBUG "" LLVM_CFLAGS ${LLVM_CFLAGS})
+       string(REPLACE -I "-isystem" LLVM_CFLAGS ${LLVM_CFLAGS})
+
+       separate_arguments(LLVM_CFLAGS)
+  endif()
+endif()
+
+if(NOT DEFINED LLVM_CFLAGS)
+  message(SEND_ERROR "LLVM 3.5 required but not found")
+endif()
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