bitcoin: Prune/fix flags and add comments

[Greg Troxel <gdt%ir.bbn.com@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Greg Troxel <gdt%ir.bbn.com@localhost>
Pushed By:	gdt
Date:		Mon Nov 28 16:14:50 2016 -0500
Changeset:	26a47c17272f613f90317a2c02086420efaaf44e

Modified Files:
	bitcoin/Makefile

Log Message:
bitcoin: Prune/fix flags and add comments

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=26a47c17272f613f90317a2c02086420efaaf44e

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 bitcoin/Makefile | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diffs:
diff --git a/bitcoin/Makefile b/bitcoin/Makefile
index 49f8953..e8e38fc 100644
--- a/bitcoin/Makefile
+++ b/bitcoin/Makefile
@@ -22,12 +22,6 @@ CFLAGS+=        -fPIC
 # TODO: Explain why this is necessary.
 CXXFLAGS+=	-std=c++0x
 
-# TODO: Explain why these are necessary.
-CPPFLAGS+=	-I${BUILDLINK_PREFIX.boost-headers}/include/boost, -Wl,-R${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin
-CPPFLAGS+=	-L${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin
-CFLAGS+=	-Wl,-R${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin -L${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin
-CXXFLAGS+=	-Wl,-R${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin -L${BUILDLINK_PREFIX.boost-libs}/lib/bitcoin
-
 # configure does not look in PREFIX for boost unless instructed.
 CONFIGURE_ARGS+=  --with-boost=${BUILDLINK_PREFIX.boost-libs}
 # TODO: Explain why this is necessary; the -I of the include dir
@@ -40,6 +34,10 @@ CONFIGURE_ARGS+=  --enable-hardening
 # pkgsrc's db4 package installs as db4_, but bitcoin looks for db_.
 BUILDLINK_TRANSFORM+=   l:db_cxx:db4_cxx
 
+# TODO: (After updating,) file bug with bitcoin about not having
+# proper RPATH to its own libary.
+LDFLAGS+=	-Wl,-R${PREFIX}/lib/bitcoin -L${PREFIX}/lib/bitcoin
+
 RCD_SCRIPTS=	bitcoind
 BUILD_DEFS+=	VARBASE
 OWN_DIRS=	${VARBASE}/bitcoin