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 8a710ea1cc8c5d67fe89111f80d9a2fc2248bdef..cf672a48691f37fa95508bb10f4f7781bb67cbf9 100644 (file)
--- a/tools/llvm-config/CMakeLists.txt
+++ b/tools/llvm-config/CMakeLists.txt
@@ -18,8 +18,6 @@ execute_process(COMMAND date
 #set(LLVMGCCDIR "")
 #set(LLVMGCC "")
 #set(LLVMGXX "")
-#set(LLVMGCC_VERSION "")
-#set(LLVMGCC_MAJVERS "")
 test_big_endian(IS_BIG_ENDIAN)
 if( IS_BIG_ENDIAN )
   set(ENDIAN "big")
@@ -80,10 +78,13 @@ add_custom_command(OUTPUT ${LIBDEPS_TMP}
 add_custom_command(OUTPUT ${LIBDEPS}
   COMMAND ${CMAKE_COMMAND} -E copy_if_different ${LIBDEPS_TMP} ${LIBDEPS}
   DEPENDS ${LIBDEPS_TMP}
-  COMMENT "Updated ${LIBDEPS} because dependencies changed")
+  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.")