Ian Lance Taylor <i...@google.com> writes:
> This patch changes the gccgo driver to pass -t to the native linker on
> Solaris. This avoids warnings like
>
> ld: warning: symbol 'go$zerovalue' has differing sizes:
> (file hello.o value=0x8; file
> i386-pc-solaris2.11/libgo/.libs/libgo.so value=0x800);
> hello.o definition taken and updated with larger size
>
> The symbol go$zerovalue is a common symbol and it's normal for it to
> have different sizes in different object files and shared libraries.
> The linker should take the larger size, which is what it does.
> Unfortunately, by default, it emits a warning, which in this case is
> useless. This patch passes the -t option to disable the warning.
>
> Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu.
> Bootstrapped and ran a few tests on x86_64-sun-solaris. Committed to
> mainline.
Works fine, thanks. Just before your patch arrived, I meant to test the
following, slightly more general patch. Perhaps it's an option to
handle other quirks like this?
Rainer
2014-06-13 Rainer Orth <r...@cebitec.uni-bielefeld.de>
gcc/go:
PR go/61496
* gospec.c (lang_specific_driver) [TARGET_GO_LINK_OPTIONS]: Pass
target specific link options.
gcc:
PR go/61496
* config/sol2.h [!USE_GLD] (TARGET_GO_LINK_OPTIONS): Define.
# HG changeset patch
# Parent 59e0e6f1eecd53ddab49b2cd5015be221b5e505a
Suppress Solaris ld warnings about go$zerovalue sizes (PR go/61496)
diff --git a/gcc/config/sol2.h b/gcc/config/sol2.h
--- a/gcc/config/sol2.h
+++ b/gcc/config/sol2.h
@@ -303,6 +303,12 @@ along with GCC; see the file COPYING3.
/* collect2.c can only parse GNU nm -n output. Solaris nm needs -png to
produce the same format. */
#define NM_FLAGS "-png"
+
+#ifndef USE_GLD
+/* Solaris ld warns about common symbols of differing sizes, which Go uses
+ for go$zerovalue. Pass -t to suppress that warning. */
+#define TARGET_GO_LINK_OPTIONS "-t"
+#endif
/* The system headers under Solaris 2 are C++-aware since 2.0. */
#define NO_IMPLICIT_EXTERN_C
diff --git a/gcc/go/gospec.c b/gcc/go/gospec.c
--- a/gcc/go/gospec.c
+++ b/gcc/go/gospec.c
@@ -395,6 +395,12 @@ lang_specific_driver (struct cl_decoded_
}
#endif
+#ifdef TARGET_GO_LINK_OPTIONS
+ /* Pass target specific linker options if present. */
+ generate_option (OPT_Wl_, TARGET_GO_LINK_OPTIONS, 1, CL_DRIVER,
+ &new_decoded_options[j++]);
+#endif
+
*in_decoded_options_count = j;
*in_decoded_options = new_decoded_options;
*in_added_libraries = added_libraries;
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
