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 8887a64a63d67274070d88148449510eeae71955..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.")
 
@@ -110,6 +113,10 @@ add_custom_target(llvm-config.target ALL
 
 add_dependencies(llvm-config.target ${llvm_lib_targets})
 
+# Make sure that llvm-config builds before the llvm tools, so we have
+# LibDeps.txt and can use it for updating the hard-coded library
+# dependencies on cmake/modules/LLVMLibDeps.cmake when the tools'
+# build fail due to outdated dependencies:
 set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} llvm-config.target)
 
 install(FILES ${LLVM_CONFIG}
@@ -118,4 +125,25 @@ install(FILES ${LLVM_CONFIG}
   DESTINATION bin)
 
 
+# Regeneration of library dependencies.
+
+# See the comments at the end of cmake/modules/LLVMConfig.cmake for
+# notes and guidelines.
+
+set(LLVMLibDeps ${LLVM_MAIN_SRC_DIR}/cmake/modules/LLVMLibDeps.cmake)
+set(LLVMLibDeps_TMP ${CMAKE_CURRENT_BINARY_DIR}/LLVMLibDeps.cmake.tmp)
+
+add_custom_command(OUTPUT ${LLVMLibDeps_TMP}
+  COMMAND sed -e s'@\\.a@@g' -e s'@\\.so@@g' -e 's@libLLVM@LLVM@g' -e 's@: @ @' -e 's@\\\(.*\\\)@set\(MSVC_LIB_DEPS_\\1\)@' ${FINAL_LIBDEPS} > ${LLVMLibDeps_TMP}
+  COMMAND ${CMAKE_COMMAND} -E copy_if_different ${LLVMLibDeps_TMP} ${LLVMLibDeps}
+  DEPENDS ${FINAL_LIBDEPS}
+  COMMENT "Updating cmake library dependencies file ${LLVMLibDeps}"
+  )
+
+if( LLVM_TARGETS_TO_BUILD STREQUAL LLVM_ALL_TARGETS )
+  add_custom_target(llvmlibdeps.target ALL DEPENDS ${LLVMLibDeps_TMP})
+  add_dependencies(llvmlibdeps.target llvm-config.target)
+  set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} llvmlibdeps.target)
+endif()
+
 set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)