OilfieldToolsNet/opm-core
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Use precompiled headers to compile C++ modules

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On an average system this will cut around 15% of the total build time.
Unfortunately, including Boost headers in the precompiled header takes
longer time to generate and then read in each module, than just
including the necessary headers in each module.

Use Noel Llopis' list_precomp.py at
http://www.gamesfromwithin.com/wp-content/uploads/bin/list_precomp_py.txt
to analyse which headers are included the most and are candidates for
inclusion.
This commit is contained in:
Roland Kaufmann 2013-01-23 14:35:50 +01:00
parent e0e1a24edd
commit f4350098ed
2 changed files with 42 additions and 2 deletions
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34
CMakeLists.txt
View File

@ -30,6 +30,9 @@ endif (CMAKE_VERSION VERSION_LESS "2.8.7")
# use tricks to do faster builds
include (UseFastBuilds)
# precompiled headers
include (UsePrecompHeaders)
# macro to set standard variables (INCLUDE_DIRS, LIBRARIES etc.)
include (OpmFind)
@ -83,8 +86,20 @@ set (CMAKE_Fortran_MODULE_DIRECTORY "${PROJECT_BINARY_DIR}/CMakeFiles")
# against using globs to enumerate source code, but if you list the
# files explicitly you'll change the build files every time you add to
# the project as well as having to rebuild completely anyway.
file (GLOB_RECURSE opmcore_SOURCES "opm/core/[^.]*.c" "opm/core/[^.]*.cpp")
file (GLOB_RECURSE opmcore_HEADERS "opm/core/[^.]*.h" "opm/core/[^.]*.hpp")
file (GLOB_RECURSE opmcore_C_SOURCES "opm/core/[^.]*.c")
file (GLOB_RECURSE opmcore_CXX_SOURCES "opm/core/[^.]*.cpp")
file (GLOB_RECURSE opmcore_C_HEADERS "opm/core/[^.]*.h")
file (GLOB_RECURSE opmcore_CXX_HEADERS "opm/core/[^.]*.hpp")
# remove pre-compile headers from output list
set (opmcore_PRECOMP_CXX_HEADER "opm/core/opm-core-pch.hpp")
list (REMOVE_ITEM opmcore_CXX_HEADERS
${PROJECT_SOURCE_DIR}/${opmcore_PRECOMP_CXX_HEADER}
)
# merge both languages into one compilation/installation
set (opmcore_SOURCES ${opmcore_C_SOURCES} ${opmcore_CXX_SOURCES})
set (opmcore_HEADERS ${opmcore_C_HEADERS} ${opmcore_CXX_HEADERS})
# Algebraic Multigrid must be compiled together with our program;
# if it is not available, then remove our corresponding component
@ -212,6 +227,21 @@ configure_vars (
APPEND "${opm-core_CONFIG_VARS}"
)
# pre-compile common headers; this is setup *after* the library to pick
# up extra options set there
get_target_property (_type opmcore TYPE)
precompile_header (CXX ${_type}
HEADER "${opmcore_PRECOMP_CXX_HEADER}"
TARGET opmcore_CXX_pch
FLAGS opmcore_PRECOMP_CXX_FLAGS
)
# must set property on source files instead of entire target, because
# it only applies to C++ modules (and cannot be used for C)
set_source_files_properties (${opmcore_CXX_SOURCES} PROPERTIES
OBJECT_DEPENDS "${opmcore_CXX_pch}"
COMPILE_FLAGS "${opmcore_PRECOMP_CXX_FLAGS}"
)
### installation ###
foreach (_hdr IN LISTS opmcore_HEADERS)
get_filename_component (_dir ${_hdr} PATH)

10
opm/core/opm-core-pch.hpp Normal file
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@ -0,0 +1,10 @@
/* List of headers that should be precompiled */
#include <algorithm>
#include <cstddef>
#include <cstdlib>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <istream>
#include <string>
#include <vector>