illumos gate

? sunstudio12.1 accepts both attribute((unused)) and attribute((unused))
I've been using it in some cross-compile test programs since awhile...

Perhaps it is a usage error that needs to be corrected.

What is the specific error output encountered?

You aren't trying to use a more recent studio are you? 12.3 and 12.4 seem to have gone off the deep end with respect to gcc attribute compatibility...

Richard PALO wrote:

? sunstudio12.1 accepts both attribute((unused)) and attribute((unused))
I've been using it in some cross-compile test programs since awhile...

Perhaps it is a usage error that needs to be corrected.

What is the specific error output encountered?

You aren't trying to use a more recent studio are you? 12.3 and 12.4 seem to have gone off the deep end with respect to gcc attribute compatibility...

i saw point to it by Gary Mils and i think, it is possible breakage for some others cross compilers.
will better fix it for compatibility.

This is the error I got:


/opt/solstudio12.2/bin/cc -xchip=ultra -Wc,-xcode=abs32
-Wc,-Qiselect-regsym=0 -m64 -xO3 ../../sparc/ml/sparc.il
-D_ASM_INLINES -Xa -xspace -W0,-Lt -errtags=yes -errwarn=%all -g
-Wc,-Qiselect-T1 -xc99=%all -W0,-noglobal -xdebugformat=stabs
-xc99=%all -Wd,-xsafe=unboundsym -Wc,-Qassembler-ounrefsym=0
-W2,-xwrap_int -W0,-xglobalstatic -xregs=no%float -xstrconst -v
-D_KERNEL -D_SYSCALL32 -D_SYSCALL32_IMPL -D_ELF64 -D_DDI_STRICT -Dsun
-D__sun -D__SVR4 -DSPITFIRE_MINREV_SUPPORTED=0x21 -DSF_ERRATA_30
-DBB_ERRATA_1 -DSF_ERRATA_32 -DSF_ERRATA_51 -DSF_ERRATA_54
-DSF_ERRATA_57 -DSF_V9_TABLE_28 -DCHEETAH_MINREV_SUPPORTED=0x30
-DCHEETAHPLUS_ERRATUM_25 -DCHEETAH_ERRATUM_109 -DCHEETAH_ERRATUM_127
-DJALAPENO_ERRATA_85 -DCHEETAHPLUS_ERRATUM_34 -I../../sparc
-I../../sparc/krtld -I../../sparc/v9 -I../../sun -I../../sun4 -Y
I,../../common
-I/dpool/export/home/mills/Downloads/code/illumos-gate/usr/src/common
-I/dpool/export/home/mills/Downloads/code/illumos-gate/usr/src/uts/common/fs/zfs-c -o /tmp/nightly.tmpdir.6143/.cwCAA3XaWH6.o -I../../../common/bzip2
../../../common/bzip2/compress.c
"../../../common/bzip2/compress.c", line 244: attribute "__unused__" is unknown, ignored (E_ATTRIBUTE_UNKNOWN)
cc: acomp failed for ../../../common/bzip2/compress.c


This is the source for common/bzip2/compress.c:


239 static
240 void sendMTFValues ( EState* s )
241 {
242 Int32 v, t, i, j, gs, ge, totc, bt, bc, iter;
243 Int32 nSelectors, alphaSize, minLen, maxLen, selCtr;
-------------------------------------------------------------------------------
244 Int32 nGroups, __GNU_UNUSED nBytes;
-------------------------------------------------------------------------------
245


The bug number is 5456 .

I copy my observation from 5456 here:

I tried building this snippet with studio 12.1 and it success without warning, so this seems related to the fact
that a more recent release such as 12.[234] was used...

http://cr.dilos.org/cr/il-5625/

I'd also recommend maintaining the ``__sun_attr__((unused))'' style in sys/ccompile.h . Unless you want to change all of them, you should follow the suggestion by Andy Stormont.