Add a new LIBRARIES_ONLY make variable to disable the build and install

of files other than the actual libraries.

Use LIBRARIES_ONLY to supress the inclusion of files in the lib32
distribution that are duplicates of files in base.

Sponsored by:	DARPA, AFRL
Reviewed by:	emaste

Makefile.inc1

@@ -336,6 +336,7 @@ LIB32WMAKEFLAGS+=	\
 		CXX="${CXX} ${LIB32FLAGS}" \
 		DESTDIR=${LIB32TMP} \
 		-DCOMPAT_32BIT \
+		-DLIBRARIES_ONLY \
 		-DNO_CPU_CFLAGS \
 		-DNO_CTF \
 		-DNO_LINT

cddl/lib/libdtrace/Makefile

@@ -103,7 +103,7 @@ dt_names.c:
 beforedepend:	dt_errtags.c dt_names.c
 
 beforeinstall:
-.if exists(${DESTDIR}/usr/lib/dtrace)
+.if !defined(LIBRARIES_ONLY) && exists(${DESTDIR}/usr/lib/dtrace)
 .for file in ${DSRCS}
 	${INSTALL} -o ${BINOWN} -g ${BINGRP} -m ${NOBINMODE} ${.CURDIR}/${file} ${DESTDIR}/usr/lib/dtrace
 .endfor

share/mk/bsd.README

@@ -356,6 +356,8 @@ SHLIB_LDSCRIPT	Template file to generate shared library linker script.
 		Unless used, a simple symlink is created to the real
 		shared object.
 
+LIBRARIES_ONLY	Do not build or install files other than the library.
+
 The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
 if it exists, as well as the include file <bsd.man.mk>.
 

share/mk/bsd.lib.mk

@@ -331,9 +331,12 @@ _libinstall:
 .endif
 .endif # !defined(INTERNALLIB)
 
+.if !defined(LIBRARIES_ONLY)
 .include <bsd.nls.mk>
 .include <bsd.files.mk>
 .include <bsd.incs.mk>
+.endif
+
 .include <bsd.links.mk>
 
 .if ${MK_MAN} != "no"
@@ -348,7 +351,7 @@ lint: ${SRCS:M*.c}
 	${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.ALLSRC}
 .endif
 
-.if ${MK_MAN} != "no"
+.if ${MK_MAN} != "no" && !defined(LIBRARIES_ONLY)
 .include <bsd.man.mk>
 .endif