Add a generic expansion transform: A op (B op' C) -> (A op B) op' (A op C)

[oota-llvm.git] / tools / llvm-config / CMakeLists.txt

diff --git a/tools/llvm-config/CMakeLists.txt b/tools/llvm-config/CMakeLists.txt
index 663cae5ed2d4ee5fb568b3452a42d87cfcff2b86..cf672a48691f37fa95508bb10f4f7781bb67cbf9 100644 (file)
--- a/tools/llvm-config/CMakeLists.txt
+++ b/tools/llvm-config/CMakeLists.txt
@@ -80,8 +80,11 @@ add_custom_command(OUTPUT ${LIBDEPS}
   DEPENDS ${LIBDEPS_TMP}
   COMMENT "Updating ${LIBDEPS} if necessary...")
 
+# This must stop the build if find-cycles.pl returns error:
 add_custom_command(OUTPUT ${FINAL_LIBDEPS}
-  COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/find-cycles.pl < ${LIBDEPS} > ${FINAL_LIBDEPS} || ${CMAKE_COMMAND} -E remove -f ${FINAL_LIBDEPS}
+  COMMAND ${CMAKE_COMMAND} -E remove -f ${FINAL_LIBDEPS} ${FINAL_LIBDEPS}.tmp
+  COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/find-cycles.pl < ${LIBDEPS} > ${FINAL_LIBDEPS}.tmp
+  COMMAND ${CMAKE_COMMAND} -E copy ${FINAL_LIBDEPS}.tmp ${FINAL_LIBDEPS}
   DEPENDS ${LIBDEPS}
   COMMENT "Checking for cyclic dependencies between LLVM libraries.")