Author: arichardson
Date: Mon Aug 20 10:59:49 2018
New Revision: 338099
URL: https://svnweb.freebsd.org/changeset/base/338099
Log:
Don't rebuild ioctl.c and relink libsysdecode if there are no changes
Instead generate a temporary file and only overwrite ioctl.c if the
files are actually different.
Approved By: jhb (mentor)
Modified:
head/lib/libsysdecode/Makefile
Modified: head/lib/libsysdecode/Makefile
==============================================================================
--- head/lib/libsysdecode/Makefile Mon Aug 20 10:39:53 2018
(r338098)
+++ head/lib/libsysdecode/Makefile Mon Aug 20 10:59:49 2018
(r338099)
@@ -129,11 +129,16 @@ tables.h: mktables
# mkioctls runs find(1) for headers so needs to rebuild every time. This used
# to be a hack only done in buildworld.
.if !defined(_SKIP_BUILD)
-ioctl.c: .PHONY
+ioctl.c.tmp: .PHONY
.endif
-ioctl.c: mkioctls .META
+ioctl.c.tmp: mkioctls .META
env CPP="${CPP}" MK_PF="${MK_PF}" \
/bin/sh ${.CURDIR}/mkioctls ${SYSROOT:U${DESTDIR}}${INCLUDEDIR} >
${.TARGET}
+
+ioctl.c: ioctl.c.tmp
+ if [ ! -e ${.TARGET} ] || ! cmp -s ${.TARGET} ${.TARGET}.tmp; then \
+ mv -f ${.TARGET}.tmp ${.TARGET}; \
+ fi
beforedepend: ioctl.c tables.h
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