Various hacks to get GCC to compile.

Don't pass CC etc variables down to libgcc directory, since that
stops it from being cross-compiled.

sys/sdt.h (part of systemtap) is not available, so comment it out.

diff --git a/0001-HACKS-TO-GET-GCC-TO-COMPILE.patch b/0001-HACKS-TO-GET-GCC-TO-COMPILE.patch
new file mode 100644 (file)
index 0000000..60addba
--- /dev/null
+++ b/0001-HACKS-TO-GET-GCC-TO-COMPILE.patch
@@ -0,0 +1,81 @@
+From 24fdf86d8b3839e261760db7603168abc337ff1b Mon Sep 17 00:00:00 2001
+From: "Richard W.M. Jones" <rjones@redhat.com>
+Date: Wed, 10 Aug 2016 21:50:34 +0100
+Subject: [PATCH] HACKS TO GET GCC TO COMPILE
+
+---
+ Makefile.in         |  8 +++-----
+ libgcc/unwind-dw2.c | 14 +++++++-------
+ 2 files changed, 10 insertions(+), 12 deletions(-)
+
+diff --git a/Makefile.in b/Makefile.in
+index 1522e39..d328543 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -38500,7 +38500,7 @@ configure-target-libgcc: stage_current
+ @if target-libgcc
+ maybe-configure-target-libgcc: configure-target-libgcc
+ configure-target-libgcc: 
+-      @r=`${PWD_COMMAND}`; export r; \
++      r=`${PWD_COMMAND}`; export r; \
+       s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
+       echo "Checking multilib configuration for libgcc..."; \
+       $(SHELL) $(srcdir)/mkinstalldirs $(TARGET_SUBDIR)/libgcc; \
+@@ -38517,7 +38517,6 @@ configure-target-libgcc:
+       fi; \
+       test ! -f $(TARGET_SUBDIR)/libgcc/Makefile || exit 0; \
+       $(SHELL) $(srcdir)/mkinstalldirs $(TARGET_SUBDIR)/libgcc; \
+-      $(NORMAL_TARGET_EXPORTS)  \
+       echo Configuring in $(TARGET_SUBDIR)/libgcc; \
+       cd "$(TARGET_SUBDIR)/libgcc" || exit 1; \
+       case $(srcdir) in \
+@@ -38819,11 +38818,10 @@ all-target-libgcc: stage_current
+ TARGET-target-libgcc=all
+ maybe-all-target-libgcc: all-target-libgcc
+ all-target-libgcc: configure-target-libgcc
+-      @r=`${PWD_COMMAND}`; export r; \
++      r=`${PWD_COMMAND}`; export r; \
+       s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
+-      $(NORMAL_TARGET_EXPORTS)  \
+       (cd $(TARGET_SUBDIR)/libgcc && \
+-        $(MAKE) $(BASE_FLAGS_TO_PASS) $(EXTRA_TARGET_FLAGS)   \
++        $(MAKE) \
+               $(TARGET-target-libgcc))
+ @endif target-libgcc
+ 
+diff --git a/libgcc/unwind-dw2.c b/libgcc/unwind-dw2.c
+index 1fb6026..4e6213c 100644
+--- a/libgcc/unwind-dw2.c
++++ b/libgcc/unwind-dw2.c
+@@ -37,9 +37,9 @@
+ #include "gthr.h"
+ #include "unwind-dw2.h"
+ 
+-#ifdef HAVE_SYS_SDT_H
+-#include <sys/sdt.h>
+-#endif
++//#ifdef HAVE_SYS_SDT_H
++//#include <sys/sdt.h>
++//#endif
+ 
+ #ifndef __USING_SJLJ_EXCEPTIONS__
+ 
+@@ -1601,11 +1601,11 @@ _Unwind_DebugHook (void *cfa __attribute__ ((__unused__)),
+ {
+   /* We only want to use stap probes starting with v3.  Earlier
+      versions added too much startup cost.  */
+-#if defined (HAVE_SYS_SDT_H) && defined (STAP_PROBE2) && _SDT_NOTE_TYPE >= 3
+-  STAP_PROBE2 (libgcc, unwind, cfa, handler);
+-#else
++//#if defined (HAVE_SYS_SDT_H) && defined (STAP_PROBE2) && _SDT_NOTE_TYPE >= 3
++//  STAP_PROBE2 (libgcc, unwind, cfa, handler);
++//#else
+   asm ("");
+-#endif
++//#endif
+ }
+ 
+ /* Install TARGET into CURRENT so that we can return to it.  This is a
+-- 
+2.7.4
+

diff --git a/Makefile b/Makefile
index fd5968a..1388e75 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -490,6 +490,8 @@ mpc-$(MPC_VERSION).tar.gz:
 stage3-chroot/usr/bin/gcc: gcc-$(GCC_X_VERSION).tar.gz
        rm -rf riscv-gcc-riscv-gcc-$(GCC_X_VERSION)
        zcat $^ | tar xf -
+       cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION) && \
+       patch -p1 < ../0001-HACKS-TO-GET-GCC-TO-COMPILE.patch
        mkdir riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build
        cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build && \
        PATH=$(ROOT)/fixed-gcc:$$PATH \
@@ -504,10 +506,8 @@ stage3-chroot/usr/bin/gcc: gcc-$(GCC_X_VERSION).tar.gz
            --disable-libquadmath \
            --disable-nls \
            --disable-multilib
-# XXX use make all & make install here.  However building libgcc
-# fails, see 'broken-gcc.log'.
-       cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build && PATH=$(ROOT)/fixed-gcc:$$PATH make all-gcc
-       cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build && make install-gcc DESTDIR=$(ROOT)/stage3-chroot
+       cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build && PATH=$(ROOT)/fixed-gcc:$$PATH make
+       cd riscv-gcc-riscv-gcc-$(GCC_X_VERSION)/build && make install DESTDIR=$(ROOT)/stage3-chroot
 
 gcc-$(GCC_X_VERSION).tar.gz:
        rm -f $@ $@-t

diff --git a/init.sh b/init.sh
index 4a105fc..eac9bd9 100755 (executable)
--- a/init.sh
+++ b/init.sh
@@ -21,6 +21,17 @@ date `date -r /usr/bin +%m%d%H%M%Y`
 hostname stage3
 echo stage3.fedoraproject.org > /etc/hostname
 
+# Set up the PATH.  The GCC path is a hack because I wasn't able to
+# find the right flags for configuring GCC.
+PATH=/usr/libexec/gcc/riscv64-unknown-linux-gnu/6.1.0:\
+/usr/local/bin:\
+/usr/local/sbin:\
+/usr/bin:\
+/usr/sbin:\
+/bin:\
+/sbin
+export PATH
+
 echo
 echo "Welcome to the Fedora/RISC-V stage3 disk image"
 echo "https://fedoraproject.org/wiki/Architectures/RISC-V"