https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83308
Bug ID: 83308
Summary: Missing platform definitions for SH in libgo
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: glaubitz at physik dot fu-berlin.de
CC: bugdal at aerifal dot cx, cmang at google dot com, ian at
airs dot com,
jrtc27 at jrtc27 dot com, olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Trying to build gcc-7 with the Go frontend enabled fails with:
libtool: compile: /<<PKGBUILDDIR>>/build/./gcc/xgcc
-B/<<PKGBUILDDIR>>/build/./gcc/ -B/usr/sh4-linux-gnu/bin/
-B/usr/sh4-linux-gnu/lib/ -isystem /usr/sh4-linux-gnu/include
-isystem /usr/sh4-linux-gnu/sys-include -isystem
/<<PKGBUILDDIR>>/build/sys-include -DHAVE_CONFIG_H -I.
-I../../../src/libgfortran -iquote../../../src/libgfortran/io -I../
../../src/libgfortran/../gcc -I../../../src/libgfortran/../gcc/config
-I../.././gcc -I../../../src/libgfortran/../libgcc -I../libgcc
-I../../../src/libgfortran/../libbacktr
ace -I../libbacktrace -I../libbacktrace -std=gnu11 -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-d
eclaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections
-mieee -g -O2 -MT maxloc0_16_i16.lo -MD -MP -MF .deps/maxloc0_16_i16.Tpo -c
../../../src/libgf
ortran/generated/maxloc0_16_i16.c -o maxloc0_16_i16.o >/dev/null 2>&1
libtool: compile: /<<PKGBUILDDIR>>/build/./gcc/gccgo
-B/<<PKGBUILDDIR>>/build/./gcc/ -B/usr/sh4-linux-gnu/bin/
-B/usr/sh4-linux-gnu/lib/ -isystem /usr/sh4-linux-gnu/includ
e -isystem /usr/sh4-linux-gnu/sys-include -isystem
/<<PKGBUILDDIR>>/build/sys-include -O2 -g -I . -c
-fgo-pkgpath=runtime/internal/sys -fgo-compiling-runtime ../../../src/l
ibgo/go/runtime/internal/sys/intrinsics.go
../../../src/libgo/go/runtime/internal/sys/stubs.go
../../../src/libgo/go/runtime/internal/sys/sys.go version.go -fPIC -o runtim
e/internal/.libs/sys.o
version.go:54:15: error: reference to undefined name 'unknown'
ArchFamily = unknown
^
Looking at libgo/configure.ac, it seems that SH is missing here.
I'm currently testing the following change:
--- libgo/configure.ac.orig 2017-01-23 19:10:13.000000000 +0100
+++ libgo/configure.ac 2017-12-07 01:33:21.424493549 +0100
@@ -354,6 +354,13 @@
GOARCH_CACHELINESIZE=256
GOARCH_PCQUANTUM=2
;;
+ sh*-*-*)
+ GOARCH=sh
+ GOARCH_FAMILY=SH
+ GOARCH_CACHELINESIZE=32
+ GOARCH_PCQUANTUM=4
+ GOARCH_MINFRAMESIZE=4
+ ;;
sparc*-*-*)
AC_COMPILE_IFELSE([
#if defined(__sparcv9) || defined(__arch64__)
I know that PCQUANTUM=4 is the proper value for SH (jemalloc's source code has
4 for SH), but I'm not sure about CACHELINESIZE and MINFRAMESIZE. According to
[1], SH supports multiple page sizes, so the 4k default seems reasonable.
> [1] http://lars.nocrew.org/computers/processors/SuperH/sh4cpu_sh1.pdf
