From 36ddebdc6ff9770e1452d4051121d123baacaaa9 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 4 Jun 2016 02:40:04 +0000
Subject: des_tables.c: generation rule

* defs/gmake.mk (missing/des_tables.c): move the recipe from
  common.mk.  this is less common.

* missing/crypt.c (init_des): if des_tables.c is empty, initialize
  DES tables at runtime.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 common.mk            |  8 --------
 defs/gmake.mk        | 12 ++++++++++++
 missing/crypt.c      | 16 ++++++++++++----
 missing/des_tables.c |  4 ++++
 4 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/common.mk b/common.mk
index a8732c8196..ff435a0cfd 100644
--- a/common.mk
+++ b/common.mk
@@ -748,14 +748,6 @@ $(NEWLINE_C): $(srcdir)/enc/trans/newline.trans $(srcdir)/tool/transcode-tblgen.
 	$(Q) $(BASERUBY) "$(srcdir)/tool/transcode-tblgen.rb" -vo $@ $(srcdir)/enc/trans/newline.trans
 enc/trans/newline.$(OBJEXT): $(NEWLINE_C)
 
-{$(VPATH)}missing/des_tables.c: $(srcdir)/missing/crypt.c
-	@$(ECHO) building make_des_table
-	$(Q) $(PURIFY) $(CC) $(CPPFLAGS) -DDUMP $(LDFLAGS) $(XLDFLAGS) $(LIBS) $(OUTFLAG)make_des_table $(srcdir)/missing/crypt.c
-	@$(ECHO) generating $@
-	$(Q) $(MAKEDIRS) $(@D)
-	$(Q) ./make_des_table > $@
-	$(Q) $(RMALL) make_des_table*
-
 verconf.h: $(srcdir)/template/verconf.h.tmpl $(srcdir)/tool/generic_erb.rb
 	$(ECHO) creating $@
 	$(Q) $(BOOTSTRAPRUBY) "$(srcdir)/tool/generic_erb.rb" -o $@ $(srcdir)/template/verconf.h.tmpl
diff --git a/defs/gmake.mk b/defs/gmake.mk
index b5acb48576..ba68dc19b9 100644
--- a/defs/gmake.mk
+++ b/defs/gmake.mk
@@ -77,3 +77,15 @@ sudo-precheck: test
 install-prereq: sudo-precheck
 yes-test-all no-test-all: install
 endif
+
+$(srcdir)/missing/des_tables.c: $(srcdir)/missing/crypt.c
+ifeq ($(if $(CC),$(CROSS_COMPILING),yes),yes)
+	touch $@
+else
+	@$(ECHO) building make_des_table
+	$(Q) $(PURIFY) $(CC) $(CPPFLAGS) -DDUMP $(LDFLAGS) $(XLDFLAGS) $(LIBS) $(OUTFLAG)make_des_table $(srcdir)/missing/crypt.c
+	@$(ECHO) generating $@
+	$(Q) $(MAKEDIRS) $(@D)
+	$(Q) ./make_des_table > $@
+	$(Q) $(RMALL) make_des_table*
+endif
diff --git a/missing/crypt.c b/missing/crypt.c
index 22be52fbf0..f523aa51e6 100644
--- a/missing/crypt.c
+++ b/missing/crypt.c
@@ -93,6 +93,15 @@ static char sccsid[] = "@(#)crypt.c	8.1 (Berkeley) 6/4/93";
 #   define INIT_DES 0
 # endif
 #endif
+#if !INIT_DES
+# include "des_tables.c"
+# ifdef HAVE_DES_TABLES
+#   define init_des() ((void)0)
+# else
+#   undef INIT_DES
+#   define INIT_DES 1
+# endif
+#endif
 
 /*
  * Convert twenty-four-bit long in host-order
@@ -353,10 +362,6 @@ static des_tables_t des_tables[1];
 
 STATIC void init_des(void);
 STATIC void init_perm(C_block perm[64/CHUNKBITS][1<<CHUNKBITS], unsigned char p[64], int chars_in, int chars_out);
-
-#else
-#include "des_tables.c"
-#define init_des() ((void)0)
 #endif
 
 static const C_block constdatablock = {{0}}; /* encryption constant */
@@ -884,6 +889,8 @@ main(void)
 {
 	int i, j, k;
 	init_des();
+
+	printf("#ifndef HAVE_DES_TABLES\n\n");
 	printf("/* Initial key schedule permutation */\n");
 	printf("static const C_block	PC1ROT[64/CHUNKBITS][1<<CHUNKBITS] = {\n");
 	for (i = 0; i < numberof(PC1ROT); ++i) {
@@ -953,6 +960,7 @@ main(void)
 		printf("\t},\n");
 	}
 	printf("};\n\n");
+	printf("#define HAVE_DES_TABLES 1\n""#endif\n");
 
 	return 0;
 }
diff --git a/missing/des_tables.c b/missing/des_tables.c
index 051659d553..ab6b1d1883 100644
--- a/missing/des_tables.c
+++ b/missing/des_tables.c
@@ -1,3 +1,5 @@
+#ifndef HAVE_DES_TABLES
+
 /* Initial key schedule permutation */
 static const C_block	PC1ROT[64/CHUNKBITS][1<<CHUNKBITS] = {
 	{
@@ -1610,3 +1612,5 @@ static const C_block CF6464[64/CHUNKBITS][1<<CHUNKBITS] = {
 	},
 };
 
+#define HAVE_DES_TABLES 1
+#endif
-- 
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