From c0980c740022e025fb6c089092f03992ac8a90ba Mon Sep 17 00:00:00 2001
From: Matthias Kretz <kretz@kde.org>
Date: Mon, 9 Jul 2007 15:27:27 +0000
Subject: As posted to kde-buildsystem:

I replaced kde4automoc.cmake with a C++/QtCore based program that can run more
efficient.

Instead of creating a <targetname>.automoc file that is added to the target I
create a <targetname>_automoc.cpp file now that is compiled and linked into
the target. This file #includes all moc files that are not included by other
source files. This way the automoc can, at make-time, decide what mocs need
to be compiled explicitly and linked into the target.

E.g. the following is possible now:
foo.h:
class A : public QObject
{
  Q_OBJECT
...
};

foo.cpp does not #include "foo.moc"

run make - everything compiles and links fine (without mentioning the header
in KDE4_MOC_HEADERS either since the new automoc looks at all corresponding
header files from the .cpp files by itself)

now change foo.cpp to #include "foo.moc"

running make now will just work, even with the /fast target.

Next change I did was to create a <targetname>_automoc.cpp.files file to pass
the moc includes and the source files that belong to the target to the
automoc. I could have kept it on the command line but I got a report that the
command line was already too long for Windows' cmd.exe.

Implementation details:
- The messages of the automoc are written using cmake -E cmake_echo_color, so
the automoc correctly colorizes its messages now.
- The moc QProcesses are started in parallel (up to 10).

svn path=/trunk/KDE/kdelibs/; revision=685719
---
 modules/FindKDE4Internal.cmake | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'modules/FindKDE4Internal.cmake')

diff --git a/modules/FindKDE4Internal.cmake b/modules/FindKDE4Internal.cmake
index ac7c6e43..24803eab 100644
--- a/modules/FindKDE4Internal.cmake
+++ b/modules/FindKDE4Internal.cmake
@@ -16,6 +16,7 @@
 # compile KDE software:
 #
 # KDE4_KCFGC_EXECUTABLE    - the kconfig_compiler executable
+# KDE4_AUTOMOC_EXECUTABLE  - the kde4automoc executable
 # KDE4_MEINPROC_EXECUTABLE - the meinproc4 executable
 # KDE4_MAKEKDEWIDGETS_EXECUTABLE - the makekdewidgets executable
 #
@@ -389,11 +390,13 @@ if (_kdeBootStrapping)
       set(LIBRARY_OUTPUT_PATH  ${EXECUTABLE_OUTPUT_PATH} )
       # CMAKE_CFG_INTDIR is the output subdirectory created e.g. by XCode and MSVC
       set(KDE4_KCFGC_EXECUTABLE       ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/kconfig_compiler )
+      set(KDE4_AUTOMOC_EXECUTABLE     ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/kde4automoc )
       set(KDE4_MEINPROC_EXECUTABLE    ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/meinproc4 )
       set(KDE4_MAKEKDEWIDGETS_EXECUTABLE    ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/makekdewidgets )
    else (WIN32)
       set(LIBRARY_OUTPUT_PATH  ${CMAKE_BINARY_DIR}/lib )
       set(KDE4_KCFGC_EXECUTABLE       ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/kconfig_compiler.shell )
+      set(KDE4_AUTOMOC_EXECUTABLE     ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/kde4automoc.shell )
       set(KDE4_MEINPROC_EXECUTABLE    ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/meinproc4.shell )
       set(KDE4_MAKEKDEWIDGETS_EXECUTABLE    ${EXECUTABLE_OUTPUT_PATH}/${CMAKE_CFG_INTDIR}/makekdewidgets.shell )
    endif (WIN32)
@@ -402,6 +405,7 @@ if (_kdeBootStrapping)
 
    # when building kdelibs, make the kcfg rules depend on the binaries...
    set( _KDE4_KCONFIG_COMPILER_DEP kconfig_compiler)
+   set( _KDE4_AUTOMOC_EXECUTABLE_DEP kde4automoc)
    set( _KDE4_MAKEKDEWIDGETS_DEP makekdewidgets)
    set( _KDE4_MEINPROC_EXECUTABLE_DEP meinproc4)
 
@@ -411,6 +415,7 @@ else (_kdeBootStrapping)
 
   # ... but NOT otherwise
    set( _KDE4_KCONFIG_COMPILER_DEP)
+   set( _KDE4_AUTOMOC_EXECUTABLE_DEP)
    set( _KDE4_MAKEKDEWIDGETS_DEP)
    set( _KDE4_MEINPROC_EXECUTABLE_DEP)
 
@@ -530,6 +535,9 @@ else (_kdeBootStrapping)
    find_program(KDE4_KCFGC_EXECUTABLE NAME kconfig_compiler PATHS ${KDE4_BIN_INSTALL_DIR} NO_DEFAULT_PATH )
    find_program(KDE4_KCFGC_EXECUTABLE NAME kconfig_compiler )
 
+   find_program(KDE4_AUTOMOC_EXECUTABLE NAME kde4automoc PATHS ${KDE4_BIN_INSTALL_DIR} NO_DEFAULT_PATH )
+   find_program(KDE4_AUTOMOC_EXECUTABLE NAME kde4automoc )
+
    find_program(KDE4_MEINPROC_EXECUTABLE NAME meinproc4 PATHS ${KDE4_BIN_INSTALL_DIR} NO_DEFAULT_PATH )
    find_program(KDE4_MEINPROC_EXECUTABLE NAME meinproc4 )
 
@@ -864,6 +872,12 @@ macro (KDE4_PRINT_RESULTS)
    else(KDE4_KCFGC_EXECUTABLE)
       message(STATUS "Didn't find the KDE4 kconfig_compiler preprocessor")
    endif(KDE4_KCFGC_EXECUTABLE)
+
+   if(KDE4_AUTOMOC_EXECUTABLE)
+      message(STATUS "Found KDE4 automoc: ${KDE4_AUTOMOC_EXECUTABLE}")
+   else(KDE4_AUTOMOC_EXECUTABLE)
+      message(STATUS "Didn't find the KDE4 automoc")
+   endif(KDE4_AUTOMOC_EXECUTABLE)
 endmacro (KDE4_PRINT_RESULTS)
 
 
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