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From: Dag-Erling Smorgrav <des@FreeBSD.org>
Date: Sat, 26 May 2012 18:20:31 +0000 (UTC)
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Subject: svn commit: r236116 - stable/9/lib/libpam/libpam
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Author: des
Date: Sat May 26 18:20:30 2012
New Revision: 236116
URL: http://svn.freebsd.org/changeset/base/236116

Log:
  MFH r226625, 226632: document what openpam_static.c is for

Modified:
  stable/9/lib/libpam/libpam/Makefile
Directory Properties:
  stable/9/lib/libpam/   (props changed)

Modified: stable/9/lib/libpam/libpam/Makefile
==============================================================================
--- stable/9/lib/libpam/libpam/Makefile	Sat May 26 17:56:54 2012	(r236115)
+++ stable/9/lib/libpam/libpam/Makefile	Sat May 26 18:20:30 2012	(r236116)
@@ -148,7 +148,15 @@ HEADERS=	security/openpam.h \
 
 ADD_HEADERS=	security/pam_mod_misc.h
 
+#
 # Static modules
+#
+# We build static versions of all modules and of openpam_static.o,
+# then link them all together into openpam_static_modules.o.  None of
+# the modules export any symbols, but they store structures with
+# pointers to their service functions in a linker set which the code
+# in openpam_static.c traverses to locate the individual modules.
+#
 MODULE_DIR=	../modules
 .include "${.CURDIR}/${MODULE_DIR}/modules.inc"
 STATIC_MODULES=	${MODULES:C/.*/${MODULE_DIR}\/&\/lib&.a/}
@@ -159,7 +167,8 @@ CLEANFILES+=	openpam_static.o \
 openpam_static_modules.o: openpam_static.o ${STATIC_MODULES}
 	${LD} -o ${.TARGET} -r --whole-archive ${.ALLSRC}
 
-# Can't put openpam_static.c in SRCS but want .o in .depend.
+# We can't put openpam_static.c in SRCS, but we still want to scan it
+# for dependencies.
 DPSRCS=		openpam_static.c
 
 # Headers