1 [adjusted very slightly to apply to gcc-3.3.2 - dank]
3 From: kaz Kojima <kkojima@rr.iij4u.or.jp>
5 I've noticed one more problem about this issue. In the testcase given
6 by ZhouChang, libdemo.so exports __movstr_i4_even which is a function
7 in libgcc.a. This itself is not a problem but it means that some functions
8 in libgcc.a which should not be exported from shared objects might be
9 exported from shared libs
11 Date: Wed, 19 Nov 2003 09:04:12 +0900 (JST)
12 From: kaz Kojima <kkojima@rr.iij4u.or.jp>
13 Subject: [linux-sh:03096] Re: [linux] Re: About tool chain in
14 http://kegel.com/crosstool/
16 Cc: zjuzhou@yahoo.com.cn, linux-sh@m17n.org, zhan_sh@yahoo.com.cn,
17 crossgcc@sources.redhat.com
18 Message-Id: <20031119.090412.85413542.kkojima@rr.iij4u.or.jp>
22 Dan Kegel <dank@kegel.com> wrote:
23 > I'll try that, thanks. I notice that the '.hidden' isn't in cvs yet.
24 > I also notice you've been trying to get that into CVS for two years
25 > now (http://gcc.gnu.org/ml/gcc-patches/2001-10/msg00053.html).
26 > Time for another try? It'd be nice if gcc-3.4 (and maybe even gcc-3.3.3)
27 > didn't need a patch for this.
29 The situation is a bit complicated. sh-linux target doesn't make
30 shared libgcc in gcc-3.3.x.
31 OTOH, I withdrew that .hidden patch because gcc-3.3 has a general
32 mechanism to make all libgcc functions .hidden. But I missed that
33 that mechanism was conditionalized later so that it's done only
34 when the target creates the shared libgcc.
35 In 3.4, sh-linux target becomes to use the shared libgcc like as
36 all other linux targets, so there is no problem.
38 I inclined to backport 3.4 shared libgcc stuff to 3.3.3 rather
39 than the old .hidden patch. How do you think about it?
40 I'm happy if you or ZhouChang create a PR on gcc bugzilla about
46 This is a backport of 3.4 shared libgcc stuff to 3.3 branch.
47 * config.gcc (sh*-*-linux*): Add t-slibgcc-elf-ver and t-linux.
48 to tmake_file. * config/sh/libgcc-glibc.ver: New file.
49 * config/sh/t-linux (SHLIB_LINK): Override to use a linker script
51 (SHLIB_INSTALL): Likewise.
53 diff -u3prN ORIG/gcc-3.3/gcc/config/sh/libgcc-glibc.ver gcc-3.3/gcc/config/sh/libgcc-glibc.ver
54 --- ORIG/gcc-3.3/gcc/config/sh/libgcc-glibc.ver Thu Jan 1 09:00:00 1970
55 +++ gcc-3.3/gcc/config/sh/libgcc-glibc.ver Wed Nov 19 08:15:16 2003
57 +# In order to work around the very problems that force us to now generally
58 +# create a libgcc.so, glibc reexported a number of routines from libgcc.a.
59 +# By now choosing the same version tags for these specific routines, we
60 +# maintain enough binary compatibility to allow future versions of glibc
61 +# to defer implementation of these routines to libgcc.so via DT_AUXILIARY.
63 +# Note that we cannot use the default libgcc-glibc.ver file on sh,
64 +# because GLIBC_2.0 does not exist on this architecture, as the first
65 +# ever glibc release on the platform was GLIBC_2.2.
67 +%inherit GCC_3.0 GLIBC_2.2
70 + __register_frame_table
72 + __register_frame_info
73 + __deregister_frame_info
75 + __register_frame_info_table
78 diff -u3prN ORIG/gcc-3.3/gcc/config/sh/t-linux gcc-3.3/gcc/config/sh/t-linux
79 --- ORIG/gcc-3.3/gcc/config/sh/t-linux Fri Jun 6 11:07:14 2003
80 +++ gcc-3.3/gcc/config/sh/t-linux Wed Nov 19 08:09:26 2003
81 @@ -12,3 +12,27 @@ MULTILIB_MATCHES =
84 EXTRA_MULTILIB_PARTS= crtbegin.o crtend.o crtbeginS.o crtendS.o
86 +# Override t-slibgcc-elf-ver to export some libgcc symbols with
87 +# the symbol versions that glibc used.
88 +SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver $(srcdir)/config/sh/libgcc-glibc.ver
90 +# Override SHLIB_LINK and SHLIB_INSTALL to use linker script
92 +SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
93 + -Wl,--soname=$(SHLIB_SONAME) \
94 + -Wl,--version-script=$(SHLIB_MAP) \
95 + -o $(SHLIB_NAME) @multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC) && \
96 + rm -f $(SHLIB_SOLINK) && \
97 + (echo "/* GNU ld script"; \
98 + echo " Use the shared library, but some functions are only in"; \
99 + echo " the static library. */"; \
100 + echo "GROUP ( $(SHLIB_SONAME) libgcc.a )" \
101 + ) > $(SHLIB_SOLINK)
103 + $$(SHELL) $$(srcdir)/mkinstalldirs $$(slibdir)$(SHLIB_SLIBDIR_QUAL); \
104 + $(INSTALL_DATA) $(SHLIB_NAME) \
105 + $$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SONAME); \
106 + rm -f $$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK); \
107 + $(INSTALL_DATA) $(SHLIB_SOLINK) \
108 + $$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
109 diff -u3prN ORIG/gcc-3.3/gcc/config.gcc gcc-3.3/gcc/config.gcc
110 --- ORIG/gcc-3.3/gcc/config.gcc Sat Aug 9 07:19:07 2003
111 +++ gcc-3.3/gcc/config.gcc Wed Nov 19 08:07:53 2003
112 @@ -2308,7 +2308,7 @@ sh-*-rtems*)
115 sh-*-linux* | sh[2346lbe]*-*-linux*)
116 - tmake_file="sh/t-sh sh/t-elf"
117 + tmake_file="sh/t-sh sh/t-elf t-slibgcc-elf-ver t-linux"
119 sh*be-*-* | sh*eb-*-*) ;;