From 2671c4b9592d87c7dfdabcd95c4b482538bbc366 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Wed, 21 Nov 2018 18:46:31 -0500
Subject: [PATCH] Jambase: Change default ARFLAGS and enable NOARSCAN by default.

On most systems, "D" (deterministic) is now the default archiving mode,
and so specifying "u" will throw a warning that "D" is being used anyway.
Jam previously assumed, as it was passing "u", that the timestamps inside
.a's were valid when they were actually 0, which was leading to spurious
rebuilds of .as.

After this change, we assume archives cannot be scanned for timestamps,
which should stop the spurious rebuilds of targets on most systems.
---
 jam/Jambase | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/jam/Jambase b/jam/Jambase
index 6ea0844..8f97641 100644
--- a/jam/Jambase
+++ b/jam/Jambase
@@ -167,7 +167,6 @@
 					$(MSVC)\\lib\\oldnames.lib
 					;
 		LINKLIBS	?= ;
-		NOARSCAN	?= true ;
 		OPTIM		?=  ;
 		STDHDRS		?= $(MSVC)\\include ;
 		UNDEFFLAG	?= "/u _" ;
@@ -221,7 +220,6 @@
 	LINK		?= mwld ;
 	LINKFLAGS	?= "" ;
 	MANDIR		?= /boot/home/config/man ;
-	NOARSCAN	?= true ;
 	RANLIB		?= ranlib ;
 	STDHDRS		?= /boot/develop/headers/posix ;
 	YACC		?= bison -y ;
@@ -240,7 +238,6 @@
 	LIBDIR		?= /boot/home/config/lib ;
 	LINK		?= gcc ;
 	MANDIR		?= /boot/home/config/man ;
-	NOARSCAN	?= true ;
 	RANLIB		?= ranlib ;
 	STDHDRS		?= /boot/develop/headers/posix ;
 	YACC		?= bison -y ;
@@ -259,7 +256,6 @@
 	LIBDIR		?= /boot/common/lib ;
 	LINK		?= gcc ;
 	MANDIR		?= /boot/common/man ;
-	NOARSCAN	?= true ;
 	RANLIB		?= ranlib ;
 	STDHDRS		?= /boot/develop/headers/posix ;
 	YACC		?= bison -y ;
@@ -290,7 +286,6 @@
 	C++FLAGS	?= -Q ;	# quiet
 	LINK		?= $(CC) ;
 	LINKFLAGS	?= -Q ;	# quiet
-	NOARSCAN	?= true ;
 	RANLIB		?= "" ;
 
 	# UNIX defaults
@@ -315,7 +310,7 @@
 # General defaults; a lot like UNIX
 #
 
-AR		?= ar ru ;
+AR		?= ar rD ;
 AS		?= as ;
 ASFLAGS		?= ;
 AWK		?= awk ;
@@ -335,21 +330,22 @@
 INSTALLGRIST	?= installed ;
 JAMFILE		?= Jamfile ;
 JAMRULES	?= Jamrules ;
-LEX		?= ;
+LEX			?= ;
 LIBDIR		?= /usr/local/lib ;
 LINK		?= $(CC) ;
 LINKFLAGS	?= ;
 LINKLIBS	?= ;
-LN		?= ln ;
+LN			?= ln ;
+NOARSCAN	?= true ;
 MANDIR		?= /usr/local/man ;
 MKDIR		?= mkdir ;
-MV		?= mv -f ;
+MV			?= mv -f ;
 OPTIM		?= ;
-RCP		?= rcp ;
-RM		?= rm -f ;
+RCP			?= rcp ;
+RM			?= rm -f ;
 RMDIR		?= $(RM) ;
-RSH		?= rsh ;
-SED		?= sed ;
+RSH			?= rsh ;
+SED			?= sed ;
 SHELLHEADER	?= "#!/bin/sh" ;
 SHELLMODE	?= 755 ;
 SLASH		?= / ;
--
gitore 0.2.3