From 0ea3661a6ba0baaa39b95e836e8f2c87e2f4c20f Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Sat, 13 Mar 2021 14:08:29 +0300
Subject: add configuration for fts, handle if it is available on system

---
 Makefile            | 13 ++++++++++---
 README.md           | 33 ++++++++-------------------------
 config.mk           |  8 ++++++++
 lib/libutil/ohash.h |  4 ++++
 4 files changed, 30 insertions(+), 28 deletions(-)

diff --git a/Makefile b/Makefile
index d10f3e4..2194ac4 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,6 @@ LIBOBJ = \
 	 lib/libc/crypt/arc4random.o \
 	 lib/libc/crypt/arc4random_uniform.o \
 	 lib/libc/crypt/blowfish.o \
-	 lib/libc/gen/fts.o \
 	 lib/libc/gen/getprogname.o \
 	 lib/libc/gen/pwcache.o \
 	 lib/libc/gen/readpassphrase.o \
@@ -48,6 +47,14 @@ LIBOBJ = \
 	 lib/libutil/ohash.o \
 	 lib/libutil/pidfile.o
 
+ifeq (${FTS}, 0)
+LIBOBJ += lib/libc/gen/fts.o
+else
+CFLAGS += -DHAVE_FTS
+  ifeq (${FTS}, 1)
+  LIBFTS = -lfts
+  endif
+endif
 
 MAN = \
 	usr.bin/diff/diff.1 \
@@ -194,7 +201,7 @@ MANDOCOBJ = \
 	    usr.bin/mandoc/tree.o
 BINOBJ += ${MANDOCOBJ}
 mandoc: ${MANDOCOBJ} ${LIB}
-	${CC} ${LDFLAGS} -o $@ ${MANDOCOBJ} ${LIB} ${ZLIB}
+	${CC} ${LDFLAGS} -o $@ ${MANDOCOBJ} ${LIB} ${ZLIB} ${LIBFTS}
 
 # ------------------------------------------------------------------------------
 #  md5
@@ -239,7 +246,7 @@ PAXOBJ = \
 	 bin/pax/tty_subs.o
 BINOBJ += ${PAXOBJ}
 pax: ${PAXOBJ} ${LIB}
-	${CC} ${LDFLAGS} -o $@ ${PAXOBJ} ${LIB}
+	${CC} ${LDFLAGS} -o $@ ${PAXOBJ} ${LIB} ${LIBFTS}
 
 # ------------------------------------------------------------------------------
 # patch
diff --git a/README.md b/README.md
index c6dc860..6a7554f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 otools
-------
+======
 
 Some OpenBSD-6.8 userland utilities meant to be included in Carbs Linux base.
 
@@ -14,36 +14,19 @@ Currently includes the following software:
 - pax
 - signify
 
-You can build software individually by calling 'make <program>', and the
-program will be built to the root directory of the source. The Makefile
-is bsdmake compatible.
+You can build software individually by calling `make <program>`, and the
+program will be built to the root directory of the source. The build system is
+configured through `config.mk`
 
 
 requirements
 ------------
 
-In order to build 'mandoc', you need to either have zlib installed, or edit
-config.mk to use the in-source zlib.
+In order to build `mandoc`, you need to either have zlib installed, or edit
+`config.mk` to use the in-source `zlib`.
 
-In order to build 'nc', you need to have a libtls implementation. Carbs Linux
-uses libtls-bearssl by default.
-
-
-notes
------
-
-If you want the manpager to have tags support (doesn't work on busybox less),
-you will need to do the following:
-
-    echo CFLAGS += -DHAVE_LESS_T >> config.mk
-
-
-If you are unsure whether your less implementation includes tag support, run
-the following:
-
-    :> testfile
-    less -F -T testfile testfile && echo CFLAGS += -DHAVE_LESS_T >> config.mk
-    rm testfile
+In order to build `nc`, you need to have a `libtls` implementation. Carbs Linux
+uses `libtls-bearssl` by default.
 
 
 patch directory
diff --git a/config.mk b/config.mk
index be23125..c9c54bb 100644
--- a/config.mk
+++ b/config.mk
@@ -18,6 +18,10 @@ TLSLIB = -ltls -lbearssl
 # in-source zlib.
 ZLIB      = -lz
 
+# If fts is available on your system, we need to disable building it here.
+# Change with 1 if you are using musl-fts, 2 if you are using glibc.
+FTS=0
+
 CFLAGS  += -Wall -Wno-pointer-sign -Wno-maybe-uninitialized \
 	  -Wno-attributes -I${PWD}/includedir \
 	  -D 'DEF_WEAK(n)=_Static_assert(1, "")' \
@@ -25,3 +29,7 @@ CFLAGS  += -Wall -Wno-pointer-sign -Wno-maybe-uninitialized \
 	  -idirafter ${PWD}/sys \
 	  -idirafter ${PWD}/lib/libutil \
 	  -idirafter ${PWD}/lib/libcrypto
+
+# If you are using a less implementation with tags support, uncomment
+# the following.
+# CFLAGS += -DHAVE_LESS_T
diff --git a/lib/libutil/ohash.h b/lib/libutil/ohash.h
index c5f81ec..3bc24b6 100644
--- a/lib/libutil/ohash.h
+++ b/lib/libutil/ohash.h
@@ -18,6 +18,10 @@
 #ifndef OHASH_H
 #define OHASH_H
 
+#ifdef HAVE_FTS
+  #include <sys/cdefs.h>
+#endif
+
 /* Open hashing support. 
  * Open hashing was chosen because it is much lighter than other hash
  * techniques, and more efficient in most cases.
-- 
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