[src/trunk]: src/share/mk explain what's going on, add another kludge for -g

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9014a7b5186d
branches:  trunk
changeset: 328645:9014a7b5186d
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Apr 11 15:56:09 2014 +0000

description:
explain what's going on, add another kludge for -g

diffstat:

 share/mk/bsd.lib.mk |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r 1110cd49ce39 -r 9014a7b5186d share/mk/bsd.lib.mk
--- a/share/mk/bsd.lib.mk       Fri Apr 11 13:18:35 2014 +0000
+++ b/share/mk/bsd.lib.mk       Fri Apr 11 15:56:09 2014 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: bsd.lib.mk,v 1.351 2014/04/09 19:23:09 christos Exp $
+#      $NetBSD: bsd.lib.mk,v 1.352 2014/04/11 15:56:09 christos Exp $
 #      @(#)bsd.lib.mk  8.3 (Berkeley) 4/22/94
 
 .include <bsd.init.mk>
@@ -622,7 +622,11 @@
            ${_LDFLAGS.${_LIB}} -o ${.TARGET} ${_LIBLDOPTS} \
            -Wl,--whole-archive ${SOLIB} \
            -Wl,--no-whole-archive ${_LDADD.${_LIB}}
-.if !defined(_LIB.so.debug)
+# XXX[1]: When the arm linker bug where -Wl,-x eats $a,$d,$t from shared
+# libraries remove the following conditional and put this back in the linker
+# line. For now we delay stripping symbols until the debug split step or skip
+# it alltogether if we are using -g
+.if !defined(_LIB.so.debug) && !empty(CFLAGS:M*-g*)
        ${OBJCOPY} ${OBJCOPYLIBFLAGS} ${.TARGET}
 .endif
 #  We don't use INSTALL_SYMLINK here because this is just
@@ -642,6 +646,8 @@
 .if defined(_LIB.so.debug)
 ${_LIB.so.debug}: ${_LIB.so.full}
        ${_MKTARGET_CREATE}
+# XXX[2]: OBJCOPYLIBFLAGS is used to strip the symbols because it was not
+# done above.
        (  ${OBJCOPY} --only-keep-debug ${_LIB.so.full} ${_LIB.so.debug} \
        && ${OBJCOPY} ${OBJCOPYLIBFLAGS} --strip-debug -p -R .gnu_debuglink \
                --add-gnu-debuglink=${_LIB.so.debug} ${_LIB.so.full} \