Merge branch 'ipo-per-lang' into release-3.9

5 files changed, 21 insertions, 19 deletions

diff --git a/Modules/CheckIPOSupported.cmake b/Modules/CheckIPOSupported.cmake
index 6bbde135ea..e04ab1c543 100644
--- a/Modules/CheckIPOSupported.cmake
+++ b/Modules/CheckIPOSupported.cmake
@@ -207,15 +207,17 @@ function(check_ipo_supported)
     endif()
   endif()
 
-  if(NOT _CMAKE_IPO_SUPPORTED_BY_CMAKE)
-    _ipo_not_supported("CMake doesn't support IPO for current compiler")
-    return()
-  endif()
+  foreach(lang ${languages})
+    if(NOT _CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE)
+      _ipo_not_supported("CMake doesn't support IPO for current ${lang} compiler")
+      return()
+    endif()
 
-  if(NOT _CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER)
-    _ipo_not_supported("Compiler doesn't support IPO")
-    return()
-  endif()
+    if(NOT _CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER)
+      _ipo_not_supported("${lang} compiler doesn't support IPO")
+      return()
+    endif()
+  endforeach()
 
   if(CMAKE_GENERATOR MATCHES "^Visual Studio ")
     _ipo_not_supported("CMake doesn't support IPO for current generator")
diff --git a/Modules/Compiler/Clang.cmake b/Modules/Compiler/Clang.cmake
index ef7ff2ebe3..7d476f965f 100644
--- a/Modules/Compiler/Clang.cmake
+++ b/Modules/Compiler/Clang.cmake
@@ -30,8 +30,8 @@ else()
       set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "--gcc-toolchain=")
     endif()
 
-    set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
-    set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+    set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
 
     string(COMPARE EQUAL "${CMAKE_${lang}_COMPILER_ID}" "AppleClang" __is_apple_clang)
 
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake
index e2739a8a58..675e505347 100644
--- a/Modules/Compiler/GNU.cmake
+++ b/Modules/Compiler/GNU.cmake
@@ -48,14 +48,14 @@ macro(__compiler_gnu lang)
     set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
   endif()
 
-  set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
-  set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
+  set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
+  set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
 
   # '-flto' introduced since GCC 4.5:
   # * https://gcc.gnu.org/onlinedocs/gcc-4.4.7/gcc/Option-Summary.html (no)
   # * https://gcc.gnu.org/onlinedocs/gcc-4.5.4/gcc/Option-Summary.html (yes)
   if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.5)
-    set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
     set(__lto_flags -flto)
 
     if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.7)
diff --git a/Modules/Compiler/QCC.cmake b/Modules/Compiler/QCC.cmake
index 695a138fd4..0da7050ba5 100644
--- a/Modules/Compiler/QCC.cmake
+++ b/Modules/Compiler/QCC.cmake
@@ -13,8 +13,8 @@ macro(__compiler_qcc lang)
   set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-Wp,-isystem,")
   set(CMAKE_DEPFILE_FLAGS_${lang} "-Wc,-MD,<DEPFILE>,-MT,<OBJECT>,-MF,<DEPFILE>")
 
-  set(_CMAKE_IPO_SUPPORTED_BY_CMAKE NO)
-  set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
+  set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE NO)
+  set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
 
   unset(CMAKE_${lang}_COMPILE_OPTIONS_IPO)
   unset(CMAKE_${lang}_ARCHIVE_CREATE_IPO)
diff --git a/Modules/Platform/Linux-Intel.cmake b/Modules/Platform/Linux-Intel.cmake
index 6e2978afa9..ee9aac26a9 100644
--- a/Modules/Platform/Linux-Intel.cmake
+++ b/Modules/Platform/Linux-Intel.cmake
@@ -30,7 +30,7 @@ macro(__linux_compiler_intel lang)
   # executables that use dlopen but do not set ENABLE_EXPORTS.
   set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-rdynamic")
 
-  set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
+  set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
 
   if(XIAR)
     # INTERPROCEDURAL_OPTIMIZATION
@@ -38,10 +38,10 @@ macro(__linux_compiler_intel lang)
     set(CMAKE_${lang}_CREATE_STATIC_LIBRARY_IPO
       "${XIAR} cr <TARGET> <LINK_FLAGS> <OBJECTS> "
       "${XIAR} -s <TARGET> ")
-    set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
-    set(_CMAKE_IPO_LEGACY_BEHAVIOR YES)
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+    set(_CMAKE_${lang}_IPO_LEGACY_BEHAVIOR YES)
   else()
-    set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
   endif()
 
   if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 12.0)