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Introduced new build system features: The variable HAIKU_DONT_INCLUDE_SRC to

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turn off the inclusion of src/Jamfile, and the rule DeferredSubInclude to
include a subdirectory in UserBuildConfig. Together they allow a developer
working on a subproject to reduce jam's parsing time when only building the
subproject. Relevant mostly on BeOS; on Linux jam is pretty fast anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20321 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2007-03-04 05:09:59 +00:00
parent eb9b19800b
commit 48d60fa69c
3 changed files with 67 additions and 1 deletions
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13
Jamfile
View File

@ -132,4 +132,15 @@ Depends ScreenSaverKit :
Haiku
;
SubInclude HAIKU_TOP src ;
# Optionally we allow not to include the "src" subdirectory.
if $(HAIKU_DONT_INCLUDE_SRC) {
# Don't include "src", but at least include the stuff needed for the
# build.
SubInclude HAIKU_TOP src build ;
SubInclude HAIKU_TOP src tools ;
} else {
SubInclude HAIKU_TOP src ;
}
# Perform deferred SubIncludes.
ExecuteDeferredSubIncludes ;

39
build/jam/HeadersRules
View File

@ -397,5 +397,44 @@ rule FStandardHeaders
return $(headers) ;
}
rule DeferredSubInclude params
{
# DeferredSubInclude <subdir tokens> ;
#
# Takes the same parameter as SubInclude. The the subdirectory referred to
# by <subdir tokens> will be included when ExecuteDeferredSubIncludes is
# invoked, i.e. at the end of the root Jamfile.
HAIKU_DEFERRED_SUB_INCLUDES += "/" $(params) ;
}
rule ExecuteDeferredSubIncludes
{
# ExecuteDeferredSubIncludes ;
#
# Performs the deferred SubIncludes scheduled by DeferredSubInclude.
local tokensList = $(HAIKU_DEFERRED_SUB_INCLUDES) ;
while $(tokensList) {
# chop off leading "/"
tokensList = $(tokensList[2-]) ;
# get the tokens for the next include
local tokens ;
while $(tokensList) && $(tokensList[1]) != "/" {
tokens += $(tokensList[1]) ;
tokensList = $(tokensList[2-]) ;
}
# perform the include
if $(tokens) {
SubInclude $(tokens) ;
}
}
}
# The variable used to collect the deferred SubIncludes.
HAIKU_DEFERRED_SUB_INCLUDES = ;
# SUBDIRSYSHDRS shall be reset automatically for each subdir
SUBDIRRESET += SYSHDRS ;

16
build/jam/UserBuildConfig.sample
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@ -75,3 +75,19 @@ AddTargetVariableToScript test.inc : fs_shell_command : fsShellCommand ;
# used, i.e. a variable "rc" referring to the rc command built for the host
# platform is defined in the script.
AddTargetVariableToScript test.inc : <build>rc ;
# Optimizing Jamfile Parsing Times
# Setting this variable will prevent the root Jamfile to include the Jamfile
# in the src directory. Instead only the directories required for building the
# build tools are included. Only useful in combination with DeferredSubInclude.
HAIKU_DONT_INCLUDE_SRC = 1 ;
# Schedule the given subdirectory for inclusion at the end of the root
# Jamfile (directly using SubInclude here is not possible). Using this
# feature together with HAIKU_DONT_INCLUDE_SRC allows developers working
# only on a subproject to reduce Jamfile parsing times considerably.
DeferredSubInclude HAIKU_TOP src tests add-ons kernel file_systems
userlandfs ;