Re: [nhc-bugs] gcc 3.3 build failure

21 Sep 2003

On Fri, Sep 19, 2003 at 10:31:52AM +0100, Malcolm Wallace wrote:
...
Ian Lynagh  writes:
...
My builds with gcc 3.3 on Linux are segfaulting.
We already saw a similar behaviour in the move from gcc-2.95 to
gcc-3.x, so although we have fixed it once, perhaps the cause is
similar.  I suspect a change in the alignment constraints inserted
into the assembler code.  nhc98 assumes and requires a
    .align 4
between constant arrays of unsigned long.  In gcc-3.0, these sometimes
inexplicably lengthened to
    .align 32
and there is an "evil mangler" in the nhc98 driver script which
converts them back to 4.
I suggest you run
   gcc -x c -S -Iinclude
on an arbitrary .hc file somewhere in the distribution package,
and examine the output .s file with "grep .align".  If any of the
numbers are neither 4 nor 32, then we have the culprit.
Not with

gcc -x c -S -Iinclude src/compiler98/AssocTree.hc

I've attached the .s file.
...
...
which I think should be the two non-win32 patches from your website, the
asmlong.h patch you committed to CVS, changing abort(-1) to abort() in
src/runtime/Integer/alloca.c and protecting a trailing \ in
src/prelude/List/Difference.hs with a comment.
Your extra bugfixes are noted, thanks.
Also, I don't think make clean should be removing the .hc files in the
tarball:

--- nhc98-1.16.orig/src/compiler98/Makefile
+++ nhc98-1.16/src/compiler98/Makefile
@@ -82,7 +82,7 @@
    cd $(OBJDIR); $(LOCAL)nhc98 -H8M -o $(TARGET) *.$O
    strip $(TARGET)
 clean:
-   rm -f $(OBJDIR)/*.$O *.$O *.hi *.hc
+   rm -f $(OBJDIR)/*.$O *.$O *.hi
 realclean: clean
    rm -f *.hc *.c $(TARGET)

--- nhc98-1.16.orig/src/hmake/Makefile
+++ nhc98-1.16/src/hmake/Makefile
@@ -46,7 +46,7 @@
    strip $(MKPROG) $(OLDER) $(MKCONFIG)
 clean: 
    rm -f $(OBJS) $(CPPOBJS) $(OBJDIR)/Older.$O $(OBJDIR)/MkConfig.$O
-   rm -f *.hi *.hc *.c
+   rm -f *.hi *.c
 realclean: clean
    rm -f $(TARGETS)
 package:
...
...
Also, your build system isn't very clear to me - what is the recommended
way to use /usr/bin/gcc-2.95 as the C compiler?
The best way would be to set it up at configure time:
CC=gcc-2.95 ./configure ...
    make basic
$ tar -zxf nhc98src-1.16.tar.gz 
$ cd nhc98-1.16/
$ CC=gcc-2.95 ./configure > ../configure.out
cat: targets/ix86-Linux/ghcsym: No such file or directory
$ make basic
make: *** No rule to make target `basic-gcc', needed by `basic'.  Stop.
$ 

Passing configure --buildwith=gcc-2.95 doesn't help.


Thanks
Ian

    