[Gm2] gm2 (20180320) on gcc-4.1.2 build on Solaris 10/sparc successful

[john o goyo]

Successfully built gm2 using the tarball gcc-4.1.2+gm2-20180320.tar.gz 
with gcc-5.4.0; some modifications needed (below).  Thank you, Gaius, 
for assembling this tarball!

The following configuration script was used.

GCCVER=5.4.0
DATE=20180320

CC=/home/build/gcc/$GCCVER/bin/gcc \
CXX=/home/build/gcc/$GCCVER/bin/g++ \
CFLAGS="-D_XPG6 --std=gnu99" \
LDFLAGS="-lnsl -lsocket -lpthread -lrt" \
SHELL=/bin/bash \
CONFIG_SHELL=/bin/bash \
../../src/gcc-4.1.2+gm2-$DATE/gm2/gcc-versionno/configure \
--prefix=$HOME/gm2/4.1.2/$DATE \
--without-gnu-ld --with-ld=/usr/sfw/bin/gld \
--with-gnu-as --with-as=/usr/sfw/bin/gas  \
--enable-languages=c,c++,gm2 --disable-bootstrap --enable-checking \
--disable-libitm

------------------------------------
Gmake check-gm2 gave me the following.

                === gm2 Summary ===

# of expected passes            9236
# of unexpected failures        126
# of unresolved testcases       24

(Full log to be sent to Gaius off list.)

--------------------------------------
Modifications:

1. The script above put all languages in the Makefile and required 
manual pruning.

2. Removed the "inline" definitions of floor_log2() and exact_log2() 
from gm2/gcc-versionno/gcc/toplev.h into the toplev.c file. (Gcc kept 
reporting an error: redefinition.)

3. Moved the code for libc_name_p() from gm2/gcc-versionno/gcc/cp/cfns.h 
to gm2/gcc-versionno/gcc/cp/except.c as the code was not being put into 
the object file.

4. Gcc claimed that PATH_MAX was undefined in 
gm2/gcc-versionno/gcc/config/sparc/gmon-sol2.c.  I added <limits.h> to 
no avail, so I manually defined PATH_MAX to 1024.  Also changed asm() to 
__asm__() as gcc complained about the former.

Sincerely,
john