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-rw-r--r--pgosupport.cmake25
1 files changed, 16 insertions, 9 deletions
diff --git a/pgosupport.cmake b/pgosupport.cmake
index 90bcbc3..e92923f 100644
--- a/pgosupport.cmake
+++ b/pgosupport.cmake
@@ -11,17 +11,18 @@ function(add_pgo TargetName)
if(WIN32)
set(ProfileFileName "${TargetName}.pgd")
else(WIN32)
- # Clang/LLVM uses one profdata file for the entire repo
- set(ProfileFileName "coreclr.profdata")
+ set(ProfileFileName "${TargetName}.profdata")
endif(WIN32)
set(CLR_CMAKE_OPTDATA_PACKAGEWITHRID "optimization.${CLR_CMAKE_TARGET_OS}-${CLR_CMAKE_TARGET_ARCH}.PGO.CoreCLR")
+
+ # On case-sensitive file systems, NuGet packages are restored to lowercase paths
+ string(TOLOWER "${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}" OptDataVersionedSubPath)
+
file(TO_NATIVE_PATH
- "${CLR_CMAKE_PACKAGES_DIR}/${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}/data/${ProfileFileName}"
+ "${CLR_CMAKE_PACKAGES_DIR}/${OptDataVersionedSubPath}/data/${ProfileFileName}"
ProfilePath
)
- # NuGet packages are restored to lowercase paths
- string(TOLOWER "${ProfilePath}" ProfilePath)
if(CLR_CMAKE_PGO_INSTRUMENT)
if(WIN32)
@@ -41,10 +42,16 @@ function(add_pgo TargetName)
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO " /LTCG /USEPROFILE:PGD=${ProfilePath}")
else(WIN32)
if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
- if(HAVE_LTO)
- target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath} -Wno-profile-instr-out-of-date)
- set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-use=${ProfilePath}")
- endif(HAVE_LTO)
+ if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
+ if(HAVE_LTO)
+ target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath} -Wno-profile-instr-out-of-date)
+ set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-use=${ProfilePath}")
+ else(HAVE_LTO)
+ message(WARNING "LTO is not supported, skipping profile guided optimizations")
+ endif(HAVE_LTO)
+ else(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
+ message(WARNING "PGO is not supported; Clang 3.6 or later is required for profile guided optimizations")
+ endif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
endif(WIN32)
endif(EXISTS ${ProfilePath})