Merge topic 'precompile-headers'

8da78d4efe Precompile headers: Update documentation
5772930164 Precompile headers: Add unit tests
519606704e Precompile headers: Add support for Visual Studio generators
28be170fbc Precompile headers: Add support for Xcode generator
b8626261e9 Precompile headers: Add methods to generate PCH sources
375d01c680 PCH: add example/test
9b6797e71d PCH: add target_precompile_headers command
0467a2f91b PCH: add PRECOMPILE_HEADERS to special properties

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Daniel Pfeifer <daniel@pfeifer-mail.de>
Acked-by: Ivan171 <heavenandhell171@gmail.com>
Acked-by: Stanislav Ershov <digital.stream.of.mind@gmail.com>
Acked-by: Steve Mokris <smokris@softpixel.com>
Acked-by: Evgeniy Dushistov <dushistov@mail.ru>
Acked-by: Danila Malyutin <flashmozzg@gmail.com>
Acked-by: Viktor Kirilov <vik.kirilov@gmail.com>
Acked-by: Lucas Zhao <zhaopf6@163.com>
Merge-request: !3553

6 files changed, 40 insertions, 0 deletions

diff --git a/Modules/Compiler/Clang.cmake b/Modules/Compiler/Clang.cmake
index c3f13f3..45c33fb 100644
--- a/Modules/Compiler/Clang.cmake
+++ b/Modules/Compiler/Clang.cmake
@@ -96,5 +96,7 @@ else()
     set(CMAKE_${lang}_ARCHIVE_FINISH_IPO
       "\"${__ranlib}\" <TARGET>"
     )
+
+    set(CMAKE_PCH_PROLOGUE "#pragma clang system_header")
   endmacro()
 endif()
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake
index 6b1bd3a..e0ff174 100644
--- a/Modules/Compiler/GNU.cmake
+++ b/Modules/Compiler/GNU.cmake
@@ -11,6 +11,9 @@ set(__COMPILER_GNU 1)
 include(Compiler/CMakeCommonCompilerMacros)
 include(Internal/CMakeCheckCompilerFlag)
 
+set(__pch_header_C "c-header")
+set(__pch_header_CXX "c++-header")
+
 macro(__compiler_gnu lang)
   # Feature flags.
   set(CMAKE_${lang}_VERBOSE_FLAG "-v")
@@ -104,4 +107,9 @@ macro(__compiler_gnu lang)
     unset(_COMPILER_ARGS)
   endif()
   list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "-dM" "-E" "-c" "${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp")
+
+  set(CMAKE_PCH_EXTENSION .gch)
+  set(CMAKE_PCH_PROLOGUE "#pragma GCC system_header")
+  set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Winvalid-pch -include <PCH_HEADER>)
+  set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Winvalid-pch -x ${__pch_header_${lang}} -include <PCH_HEADER>)
 endmacro()
diff --git a/Modules/Compiler/Intel.cmake b/Modules/Compiler/Intel.cmake
index f2f16e0..d895ed0 100644
--- a/Modules/Compiler/Intel.cmake
+++ b/Modules/Compiler/Intel.cmake
@@ -32,5 +32,12 @@ else()
       unset(_COMPILER_ARGS)
     endif()
     list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "-QdM" "-P" "-Za" "${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp")
+
+    # Precompile Headers
+    set(CMAKE_PCH_EXTENSION .pchi)
+    set(CMAKE_LINK_PCH ON)
+    set(CMAKE_PCH_EPILOGUE "#pragma hdrstop")
+    set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Winvalid-pch -Wno-pch-messages -pch-use <PCH_FILE> -include <PCH_HEADER>)
+    set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Winvalid-pch -Wno-pch-messages -pch-create <PCH_FILE> -include <PCH_HEADER>)
   endmacro()
 endif()
diff --git a/Modules/Platform/Windows-Clang.cmake b/Modules/Platform/Windows-Clang.cmake
index 728e0b9..220649c 100644
--- a/Modules/Platform/Windows-Clang.cmake
+++ b/Modules/Platform/Windows-Clang.cmake
@@ -8,6 +8,9 @@ if(__WINDOWS_CLANG)
 endif()
 set(__WINDOWS_CLANG 1)
 
+set(__pch_header_C "c-header")
+set(__pch_header_CXX "c++-header")
+
 macro(__windows_compiler_clang_gnu lang)
   set(CMAKE_LIBRARY_PATH_FLAG "-L")
   set(CMAKE_LINK_LIBRARY_FLAG "-l")
@@ -73,6 +76,10 @@ macro(__windows_compiler_clang_gnu lang)
   string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -O2 -g -DNDEBUG -Xclang -gcodeview ${__ADDED_FLAGS}")
   set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
 
+  set(CMAKE_PCH_EXTENSION .gch)
+  set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Winvalid-pch -include <PCH_HEADER>)
+  set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Winvalid-pch -x ${__pch_header_${lang}} -include <PCH_HEADER>)
+
   unset(__ADDED_FLAGS)
   unset(__ADDED_FLAGS_DEBUG)
   string(TOLOWER "${CMAKE_BUILD_TYPE}" BUILD_TYPE_LOWER)
diff --git a/Modules/Platform/Windows-Embarcadero.cmake b/Modules/Platform/Windows-Embarcadero.cmake
index 48b936e..370b56e 100644
--- a/Modules/Platform/Windows-Embarcadero.cmake
+++ b/Modules/Platform/Windows-Embarcadero.cmake
@@ -119,6 +119,13 @@ macro(__embarcadero_language lang)
     "tlib ${CMAKE_START_TEMP_FILE}/p512 <LINK_FLAGS> /a <TARGET_QUOTED> <OBJECTS>${CMAKE_END_TEMP_FILE}"
     )
 
+  # Precompile Headers
+  if (EMBARCADERO)
+    set(CMAKE_PCH_EXTENSION .pch)
+    set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Xclang -include-pch -Xclang <PCH_FILE>)
+    set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Xclang -emit-pch -Xclang -include -Xclang <PCH_HEADER>)
+  endif()
+
   # Initial configuration flags.
   string(APPEND CMAKE_${lang}_FLAGS_INIT " ${_tM}")
   string(APPEND CMAKE_${lang}_FLAGS_DEBUG_INIT " -Od -v")
diff --git a/Modules/Platform/Windows-MSVC.cmake b/Modules/Platform/Windows-MSVC.cmake
index 7a83859..6ddcaa3 100644
--- a/Modules/Platform/Windows-MSVC.cmake
+++ b/Modules/Platform/Windows-MSVC.cmake
@@ -329,6 +329,15 @@ macro(__windows_compiler_msvc lang)
   set(CMAKE_${lang}_LINK_EXECUTABLE
     "${_CMAKE_VS_LINK_EXE}<CMAKE_LINKER> ${CMAKE_CL_NOLOGO} <OBJECTS> ${CMAKE_START_TEMP_FILE} /out:<TARGET> /implib:<TARGET_IMPLIB> /pdb:<TARGET_PDB> /version:<TARGET_VERSION_MAJOR>.<TARGET_VERSION_MINOR>${_PLATFORM_LINK_FLAGS} <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <LINK_LIBRARIES>${CMAKE_END_TEMP_FILE}")
 
+  set(CMAKE_PCH_EXTENSION .pch)
+  set(CMAKE_LINK_PCH ON)
+  if(MSVC_VERSION GREATER_EQUAL 1910)
+    # VS 2017 or greater
+    set(CMAKE_PCH_PROLOGUE "#pragma system_header")
+  endif()
+  set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH /Yu<PCH_HEADER> /FI<PCH_HEADER>)
+  set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH /Yc<PCH_HEADER> /FI<PCH_HEADER>)
+
   if("x${CMAKE_${lang}_COMPILER_ID}" STREQUAL "xMSVC")
     set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
     set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)