From cf807efd13ca47672871d0c50d23274fe34c3114 Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Thu, 5 Oct 2006 12:39:52 +0000
Subject: [PATCH] speed up package prereq check (only run make on those
 directories that actually contain prereq checks)

git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4927 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 include/package.mk  | 3 ++-
 include/prereq.mk   | 1 +
 package/Makefile    | 2 +-
 scripts/gen_deps.pl | 8 +++++++-
 4 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/include/package.mk b/include/package.mk
index 709bb4415..3f2f7d41b 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -163,13 +163,14 @@ define BuildPackage
     endif
 
     DUMPINFO += \
+	if [ "$$$$PREREQ_CHECK" = 1 ]; then echo "Prereq-Check: 1"; fi; \
 	echo "Version: $(VERSION)"; \
 	echo "Depends: $$(IDEPEND_$(1))"; \
 	echo "Build-Depends: $(PKG_BUILDDEP)"; \
 	echo "Category: $(CATEGORY)"; \
 	echo "Title: $(TITLE)"; \
 	echo "Description: $(DESCRIPTION)" | sed -e 's,\\,\n,g';
-
+	
     ifneq ($(URL),)
       DUMPINFO += \
 	echo; \
diff --git a/include/prereq.mk b/include/prereq.mk
index c9b82d294..eda7ca35a 100644
--- a/include/prereq.mk
+++ b/include/prereq.mk
@@ -22,6 +22,7 @@ prereq:
 .SILENT: $(TMP_DIR) prereq
 
 define Require
+  export PREREQ_CHECK=1
   ifeq ($$(CHECK_$(1)),)
     prereq: prereq-$(1)
 
diff --git a/package/Makefile b/package/Makefile
index b9392c049..b6165b856 100644
--- a/package/Makefile
+++ b/package/Makefile
@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 include $(TOPDIR)/.config
 include $(TOPDIR)/.pkgdeps
 
-PREREQ_PACKAGES:=$(patsubst %,%-prereq,$(package-y) $(package-m))
+PREREQ_PACKAGES:=$(patsubst %,%-prereq,$(package-prereq))
 DOWNLOAD_PACKAGES:=$(patsubst %,%-download,$(package-y) $(package-m))
 COMPILE_PACKAGES:=$(patsubst %,%-compile,$(package-y) $(package-m))
 INSTALL_PACKAGES:=$(patsubst %,%-install,$(package-y))
diff --git a/scripts/gen_deps.pl b/scripts/gen_deps.pl
index 70c07b70a..e7daf1886 100755
--- a/scripts/gen_deps.pl
+++ b/scripts/gen_deps.pl
@@ -13,6 +13,8 @@ my $src;
 my $makefile;
 my %conf;
 my %pkg;
+my %prereq;
+my $prereq;
 my %dep;
 my %options;
 my $opt;
@@ -33,6 +35,10 @@ while ($line = <>) {
 		defined $pkg{$name} or $pkg{$name} = {};
 		$pkg{$name}->{src} = $src;
 	};
+	$line =~ /^Prereq-Check:/ and !defined $prereq{$src} and do {
+		$prereq{$src} = 1;
+		$prereq .= "package-prereq += $src\n";
+	};
 	$line =~ /^(Build-)?Depends: \s*(.+)\s*$/ and do {
 		$pkg{$name}->{depends} ||= [];
 		foreach my $v (split /\s+/, $2) {
@@ -75,5 +81,5 @@ foreach $name (sort {uc($a) cmp uc($b)} keys %pkg) {
 }
 
 if ($line ne "") {
-	print "\n$line";
+	print "\n$line\n$prereq";
 }
-- 
2.20.1