[reactos] 01/01: [CMAKE] MSVC cmake settings improvements.

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=5e673f311854a125c3347…
commit 5e673f311854a125c3347ae00c924d347972003c
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Sat Jan 12 16:57:51 2019 +0100
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Sat Jan 12 18:09:51 2019 +0100
    [CMAKE] MSVC cmake settings improvements.
    - Always use string pooling when building: this helps reducing the
      size of the binaries due to string redundancy coming from the usage
      of __FILE__ / __RELFILE__ in the debugging helper macros. Note also
      that GCC builds use string pooling by default.
    - Use suitable add_compile_flags() command.
    - Add some explanative comments for some settings.
    Some numbers (obtained with my local builds):
    Before / After => Reduction
    ===========================
    freeldr.sys  :  443 KB (  453.632 bytes) /  364 KB (  372.736 bytes) => ~ 18%
    win32k.sys   : 1877 KB (1.922.048 bytes) / 1562 KB (1.599.488 bytes) => ~ 17%
    ntoskrnl.exe : 2253 KB (2.307.072 bytes) / 1902 KB (1.947.136 bytes) => ~ 15.6%
    kernel32.dll : 3008 KB (3.080.192 bytes) / 2906 KB (2.975.744 bytes) => ~ 3.4%
---
 sdk/cmake/config-amd64.cmake |  2 +-
 sdk/cmake/config-arm.cmake   |  2 +-
 sdk/cmake/msvc.cmake         | 27 +++++++++++++++++++--------
 3 files changed, 21 insertions(+), 10 deletions(-)
diff --git a/sdk/cmake/config-amd64.cmake b/sdk/cmake/config-amd64.cmake
index 95d9fe2f93..76439fbb6d 100644
--- a/sdk/cmake/config-amd64.cmake
+++ b/sdk/cmake/config-amd64.cmake
@@ -6,7 +6,7 @@ set(OARCH "athlon64" CACHE STRING
 "Generate instructions for this CPU type. Specify one of:
  k8 opteron athlon64 athlon-fx")
-set (OPTIMIZE "1" CACHE STRING
+set(OPTIMIZE "1" CACHE STRING
 "What level of optimization to use.
  0 = off
  1 = Default option, optimize for size (-Os) with some additional options
diff --git a/sdk/cmake/config-arm.cmake b/sdk/cmake/config-arm.cmake
index c260fc1900..7fd6a5d5ae 100644
--- a/sdk/cmake/config-arm.cmake
+++ b/sdk/cmake/config-arm.cmake
@@ -7,7 +7,7 @@ set(OARCH "armv7-a" CACHE STRING
 "Generate instructions for this CPU type. Specify one of:
  armv5te armv7-a")
-set (OPTIMIZE "1" CACHE STRING
+set(OPTIMIZE "1" CACHE STRING
 "What level of optimization to use.
  0 = off
  1 = Default option, optimize for size (-Os) with some additional options
diff --git a/sdk/cmake/msvc.cmake b/sdk/cmake/msvc.cmake
index 747b23b199..b0c5f18a45 100644
--- a/sdk/cmake/msvc.cmake
+++ b/sdk/cmake/msvc.cmake
@@ -7,17 +7,22 @@ elseif(CMAKE_BUILD_TYPE STREQUAL "Release")
     add_compile_flags("/Ox /Ob2 /Ot /Oy /GT /GF")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /OPT:REF /OPT:ICF")
 elseif(OPTIMIZE STREQUAL "1")
-    add_definitions(/O1)
+    add_compile_flags("/O1")
 elseif(OPTIMIZE STREQUAL "2")
-    add_definitions(/O2)
+    add_compile_flags("/O2")
 elseif(OPTIMIZE STREQUAL "3")
-    add_definitions(/Ot /Ox /GS-)
+    add_compile_flags("/Ot /Ox /GS-")
 elseif(OPTIMIZE STREQUAL "4")
-    add_definitions(/Os /Ox /GS-)
+    add_compile_flags("/Os /Ox /GS-")
 elseif(OPTIMIZE STREQUAL "5")
-    add_definitions(/GF /Gy /Ob2 /Os /Ox /GS-)
+    add_compile_flags("/GF /Gy /Ob2 /Os /Ox /GS-")
 endif()
+# Always use string pooling: this helps reducing the binaries size since a lot
+# of redundancy come from the usage of __FILE__ / __RELFILE__ in the debugging
+# helper macros. Note also that GCC builds use string pooling by default.
+add_compile_flags("/GF")
+
 # Enable function level linking and comdat folding
 add_compile_flags("/Gy")
 set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /OPT:REF /OPT:ICF")
@@ -29,11 +34,14 @@ endif()
 add_definitions(/Dinline=__inline /D__STDC__=1)
+# Ignore any "standard" include paths, and do not use any default CRT library.
 if(NOT USE_CLANG_CL)
     add_compile_flags("/X /Zl")
 endif()
-add_compile_flags("/GR- /EHs-c- /GS- /W3")
+# Disable RTTI, exception handling and buffer security checks by default.
+# These require run-time support that may not always be available.
+add_compile_flags("/GR- /EHs-c- /GS-")
 if(USE_CLANG_CL)
     set(CMAKE_CL_SHOWINCLUDES_PREFIX "Note: including file: ")
@@ -55,6 +63,9 @@ if(MSVC_VERSION GREATER 1899)
     add_compile_flags("/Zc:threadSafeInit-")
 endif ()
+# Generate Warnings Level 3
+add_compile_flags("/W3")
+
 # Disable overly sensitive warnings as well as those that generally aren't
 # useful to us.
 # - C4244: implicit integer truncation
@@ -381,7 +392,7 @@ function(generate_import_lib _libname _dllname _spec_file)
     # Add our library
     if(MSVC_IDE)
         add_library(${_libname} STATIC EXCLUDE_FROM_ALL ${_asm_stubs_file}.obj)
-        set_source_files_properties(${_asm_stubs_file}.obj PROPERTIES EXTERNAL_OBJECT 1)
+        set_source_files_properties(${_asm_stubs_file}.obj PROPERTIES EXTERNAL_OBJECT
TRUE)
         set_target_properties(${_libname} PROPERTIES LINKER_LANGUAGE "C")
     else()
         # NOTE: as stub file and def file are generated in one pass, depending on one is
like depending on the other
@@ -522,7 +533,7 @@ macro(add_asm_files _target)
                 OUTPUT ${_preprocessed_asm_file} ${_object_file}
                 COMMAND cl /nologo /X /I${REACTOS_SOURCE_DIR}/sdk/include/asm
/I${REACTOS_BINARY_DIR}/sdk/include/asm ${_directory_includes} ${_source_file_defines}
${_directory_defines} /D__ASM__ /D_USE_ML /EP /c ${_source_file_full_path} >
${_preprocessed_asm_file} && ${_pp_asm_compile_command}
                 DEPENDS ${_source_file_full_path})
-            set_source_files_properties(${_object_file} PROPERTIES EXTERNAL_OBJECT 1)
+            set_source_files_properties(${_object_file} PROPERTIES EXTERNAL_OBJECT TRUE)
             list(APPEND ${_target} ${_object_file})
         endforeach()
     else()