HPUX 10.01 build issues and solutions.

Hi.

I just built postgresql 6.4 beta 4 on HPUX  10.01.  This was not a clean compile
+, 
and I had to make minor  modifications to get it to compile.  First of all,
hpux 10.01 does not define SA_RESTART at all (10.20 does, but 10.01 does not).  
+
To compile under 10.01, you cant define USE_POSIX_SIGNALS in os.h  I fixed this
+
by just deleting these lines from os.h:

#ifdef HPUX_10
#define USE_POSIX_SIGNALS
#endif

Secondly, lex on hpux 10.01 has problems as well.  I got the following errors 
due to lex on 10.01:

make -C lib all
make[3]: Entering directory `/home/schout/pgsql/src/interfaces/ecpg/lib'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/home/schout/pgsql/src/interfaces/ecpg/lib'
make -C preproc all
make[3]: Entering directory `/home/schout/pgsql/src/interfaces/ecpg/preproc'
lex pgc.l
"pgc.l" line 333: warning 45: Non-portable Character Class
"pgc.l" line 333: warning 45: Non-portable Character Class
"pgc.l" line 471: warning 45: Non-portable Character Class
"pgc.l" line 471: warning 45: Non-portable Character Class
"pgc.l" line 471: warning 45: Non-portable Character Class
"pgc.l" line 471: warning 45: Non-portable Character Class
"pgc.l" line 475: warning 45: Non-portable Character Class
"pgc.l" line 475: warning 45: Non-portable Character Class
"pgc.l" line 536: warning 45: Non-portable Character Class
"pgc.l" line 536: warning 45: Non-portable Character Class
"pgc.l" line 585: warning 45: Non-portable Character Class
"pgc.l" line 585: warning 45: Non-portable Character Class
"pgc.l" line 674: warning 48: Undefined start condition <EOF
"pgc.l" line 708: error 14: Too many transitions, Try using %a num
671/1000 nodes(%e), 1482/2500 positions(%p), 168/500 (%n), 14470 transitions, 89
+5/1000 packed char classes(%k), 2000/2000 packed transitions(%a), 0/0 output sl
+ots(%o)
make[3]: *** [pgc.c] Error 1
make[3]: Leaving directory `/home/schout/pgsql/src/interfaces/ecpg/preproc'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/schout/pgsql/src/interfaces/ecpg'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/schout/pgsql/src/interfaces'
make: *** [all] Error 2



I got around this problem by installing flex-2.5.4a from prep.ai.mit.edu, and
sym linking /usr/bin/lex to /opt/gnu/bin/flex (where I installed flex).

After that, everything pretty much went smoothly.  I did have to manually commen
+t
out the rules to build libpq++ because apparently ecgs wont let you specify the
+
"-c" and "-o" flags together, but that is not a big deal to me since I dont 
+intend
to use the libpq++ interface on this machine anyways.  It would be nice if there
+ 
was a --disable-libpq++ rule for configure that would allow you to specify that 
+
you did not want to use it.  And possibly something similar like 
--with-flex=/opt/gnu/bin/flex to override the choice of /usr/bin/flex (maybe the
+se
already exist??).

Anyways, Some food for thought.  Im sure its too late to address these for the 
+
upcoming 6.4 release, but maybe for the next minor release ;)

Mike