Commit the first set of files for changing time_t on freebsd/sparc64

from a 32-bit value to a 64-bit value.  This commit does not actually
change anything.  It merely provides instructions, scripts, and a safety
measure in Makefile.inc1 for people who want to make the change.

The real change to 64-bit time_t's on sparc64 is scheduled to happen
on March 10th, assuming that so major problems are found between now
and then by early-adopters.

Reviewed by:	freebsd-sparc64

1 files changed, 63 insertions, 3 deletions

diff --git a/Makefile.inc1 b/Makefile.inc1
index b13602e..8e238e0 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -343,11 +343,70 @@ buildworld: ${WMAKE_TGTS}
 .ORDER: ${WMAKE_TGTS}
 
 #
+# Use this to add checks to installworld/installkernel targets.
+#
+SPECIAL_INSTALLCHECKS=
+
+#
+# The following install-time check will see if the installation will
+# change the type used for time_t, and if it will, the target makes
+# sure that the user is expecting to make that change.
+#
+.if ${TARGET_ARCH} == "sparc64"
+SPECIAL_INSTALLCHECKS+=sparc64_installcheck
+
+CUR_TIMETYPE!= grep __time_t /usr/include/machine/_types.h | awk '{print $$2}'
+SRC_TIMETYPE!= grep __time_t ${.CURDIR}/sys/sparc64/include/_types.h | awk '{print $$2}'
+NEWSPARC_TIMETYPE?=${CUR_TIMETYPE}
+THISHOST!= hostname -s
+.if ${THISHOST} == ""
+THISHOST="name not set yet"
+.endif
+
+sparc64_installcheck:
+.if ${CUR_TIMETYPE} != ${SRC_TIMETYPE}
+	@echo ""
+.if ${NEWSPARC_TIMETYPE} != ${SRC_TIMETYPE}
+	@echo "***  ERROR: This target would change the type used for time_t!  ***"
+.else
+	@echo "* Note: This installation changes the type used for time_t"
+.endif
+	@echo "* "
+	@echo "* This host (${THISHOST}) presently has a time_t of type ${CUR_TIMETYPE},"
+	@echo "* and this installation will switch time_t to be type ${SRC_TIMETYPE}."
+.if ${NEWSPARC_TIMETYPE} != ${SRC_TIMETYPE}
+	@echo "* "
+	@echo "* If that is *NOT* what you wanted, then you need to change the"
+	@echo "* typedef for __time_t in:   ${.CURDIR}/sys/sparc64/include/_types.h"
+	@echo "* from '${SRC_TIMETYPE}' to '${CUR_TIMETYPE}'.  After that you *MUST* do a"
+	@echo "* complete cleanworld, buildworld, buildkernel before you retry"
+	@echo "* your 'make' command.  Also read /usr/src/UPDATING.64BTT."
+	@echo "* "
+	@echo "* If that *is* what you want, then enter the commands:"
+	@echo "      NEWSPARC_TIMETYPE=${SRC_TIMETYPE}"
+	@echo "      export NEWSPARC_TIMETYPE"
+	@echo "* and repeat your 'make' command."
+	@echo ""
+	@false
+.endif
+	@echo ""
+.elif ${NEWSPARC_TIMETYPE} != ${SRC_TIMETYPE}
+	@echo ""
+	@echo "***  ERROR: The variable NEWSPARC_TIMETYPE is set to '${NEWSPARC_TIMETYPE}'"
+	@echo "***         but ${.CURDIR}/sys/sparc64/include/_types.h"
+	@echo "***         has __time_t defined as:  '${SRC_TIMETYPE}'"
+	@false
+.else
+	@# in sparc64_installcheck, all TIMETYPEs == '${NEWSPARC_TIMETYPE}'
+.endif
+.endif
+
+#
 # installcheck
 #
 # Checks to be sure system is ready for installworld
 #
-installcheck:
+installcheck: ${SPECIAL_INSTALLCHECKS}
 .if !defined(NO_SENDMAIL)
 	@if ! `id -u smmsp > /dev/null`; then \
 		echo "ERROR: Required smmsp user is missing, see /usr/src/UPDATING."; \
@@ -386,7 +445,7 @@ distributeworld installworld: installcheck
 # and do a 'make reinstall' on the *client* to install new binaries from the
 # most recent server build.
 #
-reinstall:
+reinstall: ${SPECIAL_INSTALLCHECKS}
 	@echo "--------------------------------------------------------------"
 	@echo ">>> Making hierarchy"
 	@echo "--------------------------------------------------------------"
@@ -503,7 +562,8 @@ buildkernel:
 #
 # Install the kernel defined by INSTALLKERNEL
 #
-installkernel reinstallkernel installkernel.debug reinstallkernel.debug:
+installkernel installkernel.debug \
+reinstallkernel reinstallkernel.debug: ${SPECIAL_INSTALLCHECKS}
 .if empty(INSTALLKERNEL)
 	@echo "ERROR: No kernel \"${KERNCONF}\" to install."
 	@false