From 01ba1df6a7f40a8f8a1d590f0f57e0fdf9c0571a Mon Sep 17 00:00:00 2001
From: emaste <emaste@FreeBSD.org>
Date: Thu, 20 Oct 2016 14:48:57 +0000
Subject: [PATCH] Add knobs to make GNU diff and GNU grep optional

This is added to facilitate experiments building FreeBSD without
copyleft software.

If WITHOUT_GNU_DIFF is set no /usr/bin/diff or /usr/bin/diff3 will
be built.

If WITHOUT_GNU_GREP is set then BSD grep will be installed as
/usr/bin/bsdgrep or /usr/bin/grep, depending on the WITH_BSD_GREP
knob.

Reviewed by:	brooks (earlier)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	Differential Revision: https://reviews.freebsd.org/D8288
---
 gnu/usr.bin/Makefile                     |  6 ++---
 share/mk/src.opts.mk                     |  2 ++
 tools/build/mk/OptionalObsoleteFiles.inc | 33 ++++++++++++++++++++++++
 tools/build/options/WITHOUT_GNU_DIFF     |  5 ++++
 tools/build/options/WITHOUT_GNU_GREP     |  3 +++
 5 files changed, 45 insertions(+), 4 deletions(-)
 create mode 100644 tools/build/options/WITHOUT_GNU_DIFF
 create mode 100644 tools/build/options/WITHOUT_GNU_GREP

diff --git a/gnu/usr.bin/Makefile b/gnu/usr.bin/Makefile
index a92971750691..0782ec32dfec 100644
--- a/gnu/usr.bin/Makefile
+++ b/gnu/usr.bin/Makefile
@@ -2,10 +2,6 @@
 
 .include <src.opts.mk>
 
-SUBDIR= diff \
-	diff3 \
-	grep
-
 SUBDIR_DEPEND_gdb= ${_binutils}
 
 .if ${MK_CXX} != "no"
@@ -21,6 +17,8 @@ SUBDIR.${MK_GDB}+=	gdb
 .endif
 
 SUBDIR.${MK_GCC}+=	cc
+SUBDIR.${MK_GNU_DIFF}+=	diff diff3                                      
+SUBDIR.${MK_GNU_GREP}+=	grep                                            
 SUBDIR.${MK_GPL_DTC}+=	dtc
 SUBDIR.${MK_TESTS}+=	tests
 
diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk
index 1794f3fb9954..89125d695130 100644
--- a/share/mk/src.opts.mk
+++ b/share/mk/src.opts.mk
@@ -98,6 +98,8 @@ __DEFAULT_YES_OPTIONS = \
     GCOV \
     GDB \
     GNU \
+    GNU_DIFF \
+    GNU_GREP \
     GNU_GREP_COMPAT \
     GPIO \
     GPL_DTC \
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index 6037da4766bb..e2ca4d2ff8e9 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -2173,6 +2173,39 @@ OLD_FILES+=usr/share/man/man3/gpio_pin_tristate.3.gz
 OLD_FILES+=usr/share/man/man8/gpioctl.8.gz
 .endif
 
+.if ${MK_GNU_DIFF} == no
+OLD_FILES+=usr/bin/diff
+OLD_FILES+=usr/bin/diff3
+OLD_FILES+=usr/share/man/man1/diff.1.gz
+OLD_FILES+=usr/share/man/man1/diff3.1.gz
+OLD_FILES+=usr/share/man/man7/diff.7.gz
+.endif
+
+.if ${MK_GNU_GREP} == no
+OLD_FILES+=usr/bin/gnugrep
+OLD_FILES+=usr/share/man/man1/gnugrep.1.gz
+.if ${MK_BSD_GREP} == no
+OLD_FILES+=usr/bin/bzgrep
+OLD_FILES+=usr/bin/bzegrep
+OLD_FILES+=usr/bin/bzfgrep
+OLD_FILES+=usr/bin/egrep
+OLD_FILES+=usr/bin/fgrep
+OLD_FILES+=usr/bin/grep
+OLD_FILES+=usr/bin/zegrep
+OLD_FILES+=usr/bin/zfgrep
+OLD_FILES+=usr/bin/zgrep
+OLD_FILES+=usr/share/man/man1/bzegrep.1.gz
+OLD_FILES+=usr/share/man/man1/bzfgrep.1.gz
+OLD_FILES+=usr/share/man/man1/bzgrep.1.gz
+OLD_FILES+=usr/share/man/man1/egrep.1.gz
+OLD_FILES+=usr/share/man/man1/fgrep.1.gz
+OLD_FILES+=usr/share/man/man1/grep.1.gz
+OLD_FILES+=usr/share/man/man1/zegrep.1.gz
+OLD_FILES+=usr/share/man/man1/zfgrep.1.gz
+OLD_FILES+=usr/share/man/man1/zgrep.1.gz
+.endif
+.endif
+
 # Also includes vgrind(1)
 .if ${MK_GROFF} == no
 OLD_FILES+=usr/bin/addftinfo
diff --git a/tools/build/options/WITHOUT_GNU_DIFF b/tools/build/options/WITHOUT_GNU_DIFF
new file mode 100644
index 000000000000..de8667fe4d73
--- /dev/null
+++ b/tools/build/options/WITHOUT_GNU_DIFF
@@ -0,0 +1,5 @@
+.\" $FreeBSD$
+Set to not build GNU
+.Xr diff 1
+and
+.Xr diff3 1 .
diff --git a/tools/build/options/WITHOUT_GNU_GREP b/tools/build/options/WITHOUT_GNU_GREP
new file mode 100644
index 000000000000..1bb7d4a53eba
--- /dev/null
+++ b/tools/build/options/WITHOUT_GNU_GREP
@@ -0,0 +1,3 @@
+.\" $FreeBSD$
+Set to not build GNU
+.Xr grep 1 .