[RFR]: 8186723: Add SuperH as new architecture for linux

[John Paul Adrian Glaubitz]

Hi Thomas!

On 08/24/2017 10:57 AM, Thomas Stüfe wrote:
> Out of curiosity, would that not be __sh__ instead of SH? Who defines SH?

This definition comes from common/autoconf/flags.m4:

   # Setup target CPU
   $2COMMON_CCXXFLAGS_JDK="[$]$2COMMON_CCXXFLAGS_JDK \
       $OPENJDK_$1_ADD_LP64 \
       -DARCH='\"$OPENJDK_$1_CPU_LEGACY\"' -D$OPENJDK_$1_CPU_LEGACY"

It's used in the same way for other architectures like SPARC and M68K.

Although I am not 100% sure where the uppercase definitions comes from.

However, looking at a build log, one finds:

( /usr/bin/sh4-linux-gnu-g++-6 -I/<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/precompiled -std=gnu++98 -D_GNU_SOURCE -D_REENTRANT -fcheck-new -fno-delete-null-pointer-checks -fno-lifetime-dse -DLINUX -pipe -fPIC -fno-rtti -fno-exceptions -fvisibility=hidden -fno-strict-aliasing -fno-omit-frame-pointer -DVM_LITTLE_ENDIAN -Wpointer-arith -Wsign-compare -Wunused-function -Wunused-value -Woverloaded-virtual -Wno-format-zero-length -Wtype-limits -Wuninitialized -DPRODUCT -DTARGET_ARCH_zero -DINCLUDE_SUFFIX_OS=_linux -DINCLUDE_SUFFIX_CPU=_zero -DTARGET_COMPILER_gcc -DSH -DHOTSPOT_LIB_ARCH='"sh"' -DDEB_MULTIARCH="\"sh4-linux-gnu\"" -DZERO -DCC_INTERP -DZERO_LIBARCH='"sh"' -DINCLUDE_JVMCI=0 -I/<<PKGBUILDDIR>>/src/hotspot/src/share/vm -I/<<PKGBUILDDIR>>/src/hotspot/src/os/linux/vm -I/<<PKGBUILDDIR>>/src/hotspot/src/os/posix/vm -I/<<PKGBUILDDIR>>/src/hotspot/src/cpu/zero/vm -I/<<PKGBUILDDIR>>/src/hotspot/src/os_cpu/linux_zero/vm -I/<<PKGBUILDDIR>>/build/hotspot/variant-zero/gensrc -I/<<PKGBUILDDIR>>/src/hotspot/src/share/vm/precompiled -I/<<PKGBUILDDIR>>/src/hotspot/src/share/vm/prims -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -Wformat -fno-stack-protector -Wno-deprecated-declarations -Wdate-time -D_FORTIFY_SOURCE=2 -g -O3 -DTHIS_FILE='"utf8.cpp"' -c -MMD -MF /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.d -o /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.o /<<PKGBUILDDIR>>/src/hotspot/src/share/vm/utilities/utf8.cpp > >(/usr/bin/tee /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.o.log) 2> >(/usr/bin/tee /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.o.log >&2) || ( exitcode=$? && /bin/cp /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.o.log /<<PKGBUILDDIR>>/build/make-support/failure-logs/hotspot_variant-zero_libjvm_objs_utf8.o.log && /bin/cp /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.o.cmdline /<<PKGBUILDDIR>>/build/make-support/failure-logs/hotspot_variant-zero_libjvm_objs_utf8.o.cmdline && exit $exitcode ) )
/bin/sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$//' -e 's/^[	 ]*//' -e '/^$/ d' -e 's/$/ :/'  /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.d > /<<PKGBUILDDIR>>/build/hotspot/variant-zero/libjvm/objs/utf8.d.targets
Compiling verificationType.cpp (for libjvm.so)

So, -DSH is passed to the compiler.

> Also, is LE the norm and BE needs to be mentioned in particular instead of the other way around, like with PowerPC?
Yes. On Linux, the default endianess for SuperH is little-endian.

Adrian

-- 
  .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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