Date:	Sun, 1 Sep 1996 22:12:55 -0400
From:	dj (DJ Delorie)
Message-Id:	<199609020212.WAA01945@delorie.com>
To:	djgpp-workers
Subject:	make problems

I've been having problems building gcc-2.7.2.1 - make is acting up on
me.  I'm building stage 2, so I'm invoking make like this:

	make CFLAGS="-O2 -Bstage1/" CC="stage1/xgcc" LDFLAGS="-d"

After it runs one command (doesn't matter which) (or just before it
starts the next), it segfaults - in _exit() !  It's at 0x12f4, which
is one of the places where it reads a stubinfo field, but edx (the
register in question) is valid, as are the selectors.

Note: esp is corrupt; it's set to 0x127c.  A modified mcount.c shows
that make's last libc call was to xmalloc() from target_environment().

I've run make in gdb, and it gives the same results - a seemingly
valid operation is segfaulting.  I tried cwsdpmi and linux dosemu;
both fail the same way.

If I use make to build itself, it works.

Can anyone think of any recent changes that might cause this type of
corruption?

stack trace (new and (maybe) improved):

>> ..\make-3.73\make CFLAGS="-O2 -Bstage1/" CC="stage1/xgcc" LDFLAGS="-s"
stage1/xgcc  -DIN_GCC   -O2 -Bstage1/     -I. -I. -I./config \
  -DGCC_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/go32/2.7.2.1/include\" \
  -DGPLUSPLUS_INCLUDE_DIR=\"/usr/local/lib/g++-include\" \
  -DLOCAL_INCLUDE_DIR=\"/usr/local/include\" \
  -DCROSS_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/go32/2.7.2.1/sys-include\" \
  -DTOOL_INCLUDE_DIR=\"/usr/local/go32/include\" \
  -c cccp.c
Exiting due to signal SIGSEGV
Page fault at eip=000012f4, error=0004
eax=00000502 ebx=0001f788 ecx=00000000 edx=00020000 esi=00001016 edi=10160000
ebp=00000000 esp=0000127c program=D:\V2\GNU\GCC-2721\..\make-3.73\MAKE.EXE
cs: sel=0127  base=10140000  limit=0006ffff
ds: sel=012f  base=10140000  limit=0006ffff
es: sel=012f  base=10140000  limit=0006ffff
fs: sel=0000
gs: sel=0000
ss: sel=012f  base=10140000  limit=0006ffff

Call frame traceback EIPs:
  0x000012f4
General Protection Fault at eip=3e32; flags=3016
eax=00000300 ebx=00000021 ecx=00000000 edx=0003199d esi=0000000c edi=00073c2c
ebp=00073ac0 esp=00003584 cs=18 ds=33 es=f7 fs=cf gs=ff ss=20 error=00ec

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