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- From dda6b050cd74a352670787a294596a9c56c21327 Mon Sep 17 00:00:00 2001
- From: Yousong Zhou <yszhou4tech@gmail.com>
- Date: Fri, 4 May 2018 18:20:53 +0800
- Subject: [PATCH] gotools: fix compilation when making cross compiler
- libgo is "the runtime support library for the Go programming language.
- This library is intended for use with the Go frontend."
- gccgo will link target files with libgo.so which depends on libgcc_s.so.1, but
- the linker will complain that it cannot find it. That's because shared libgcc
- is not present in the install directory yet. libgo.so was made without problem
- because gcc will emit -lgcc_s when compiled with -shared option. When gotools
- were being made, it was supplied with -static-libgcc thus no link option was
- provided. Check LIBGO in gcc/go/gcc-spec.c for how gccgo make a builtin spec
- for linking with libgo.so
- - GccgoCrossCompilation, https://github.com/golang/go/wiki/GccgoCrossCompilation
- - Cross-building instructions, http://www.eglibc.org/archives/patches/msg00078.html
- When 3-pass GCC compilation is used, shared libgcc runtime libraries will be
- available after gcc pass2 completed and will meet the gotools link requirement
- at gcc pass3
- ---
- gotools/Makefile.am | 4 +++-
- gotools/Makefile.in | 4 +++-
- 2 files changed, 6 insertions(+), 2 deletions(-)
- --- a/gotools/Makefile.am
- +++ b/gotools/Makefile.am
- @@ -26,6 +26,7 @@ PWD_COMMAND = $${PWDCMD-pwd}
- STAMP = echo timestamp >
-
- libgodir = ../$(target_noncanonical)/libgo
- +libgccdir = ../$(target_noncanonical)/libgcc
- LIBGODEP = $(libgodir)/libgo.la
-
- LIBGOTOOL = $(libgodir)/libgotool.a
- @@ -41,7 +42,8 @@ GOCFLAGS = $(CFLAGS_FOR_TARGET)
- GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
-
- AM_GOCFLAGS = -I $(libgodir)
- -AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
- +AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
- + -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
- GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
-
- libgosrcdir = $(srcdir)/../libgo/go
- --- a/gotools/Makefile.in
- +++ b/gotools/Makefile.in
- @@ -263,6 +263,7 @@ mkinstalldirs = $(SHELL) $(toplevel_srcd
- PWD_COMMAND = $${PWDCMD-pwd}
- STAMP = echo timestamp >
- libgodir = ../$(target_noncanonical)/libgo
- +libgccdir = ../$(target_noncanonical)/libgcc
- LIBGODEP = $(libgodir)/libgo.la
- LIBGOTOOL = $(libgodir)/libgotool.a
- @NATIVE_FALSE@GOCOMPILER = $(GOC)
- @@ -271,7 +272,8 @@ LIBGOTOOL = $(libgodir)/libgotool.a
- @NATIVE_TRUE@GOCOMPILER = $(GOC_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET)
- GOCOMPILE = $(GOCOMPILER) $(GOCFLAGS)
- AM_GOCFLAGS = -I $(libgodir)
- -AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs
- +AM_LDFLAGS = -L $(libgodir) -L $(libgodir)/.libs \
- + -L $(libgccdir) -L $(libgccdir)/.libs -lgcc_s
- GOLINK = $(GOCOMPILER) $(GOCFLAGS) $(AM_GOCFLAGS) $(LDFLAGS) $(AM_LDFLAGS) -o $@
- libgosrcdir = $(srcdir)/../libgo/go
- cmdsrcdir = $(libgosrcdir)/cmd
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