OpenSolaris

mtime of object file on ufs generated by as(1) is not updated
if touch(1) is run to the object file before as(1) running.
This phenomenon is exposed in S7+106541-15 and later however
it does not occur in S7+106541-14.

The test case consists of the following two files,

----------------------------------------------------------------
# cat a.s
        .section ".text"
        .global func
        .align  4
func:
        mov   0, %o0
        retl
        nop
----------------------------------------------------------------
# cat test.sh
#!/bin/csh
rm a.o
/usr/ccs/bin/as -o a.o -Qy -q a.s 
ls -l a.o 
sleep 60 
/bin/touch a.o 
ls -l a.o 
sleep 60 
/usr/ccs/bin/as -o a.o -Qy -q a.s 
ls -l a.o 
----------------------------------------------------------------

Log of reproduction test is below,

Solaris7 KU20 ================================================================

# uname -a
SunOS xxx 5.7 Generic_106541-20 sun4u sparc SUNW,Ultra-60
# ./test.sh
-rw-r--r--   1 root     other        452  5  30   14:39 a.o
-rw-r--r--   1 root     other        452  5  30   14:40 a.o
-rw-r--r--   1 root     other        452  5  30   14:40 a.o


Solaris7 KU15 ================================================================

# uname -a
SunOS xxx 5.7 Generic_106541-15 sun4u sparc SUNW,Ultra-60
# ./test.sh
-rw-r--r--   1 root     other        452  5  30   11:23 a.o
-rw-r--r--   1 root     other        452  5  30   11:24 a.o
-rw-r--r--   1 root     other        452  5  30   11:24 a.o
# 

Solaris7 KU14 ================================================================

# uname -a
SunOS xxx 5.7 Generic_106541-14 sun4u sparc SUNW,Ultra-2
# ./test.sh
-rw-r--r--   1 root     other        452  5  30   11:23 a.o
-rw-r--r--   1 root     other        452  5  30   11:24 a.o
-rw-r--r--   1 root     other        452  5  30   11:25 a.o
# 

Run sync(1M) command after touch(1) command.
 xxxxx@xxxxx.com 2003-07-09

usr /usr/ccs/bin/as from a Solaris 9 FCS system or later.
If you're using the make(1S) command for re-building object files, simply issue a "sync" before the "make". Whether you replace make with a shellscript that issues 'sync; make', shell-alias 'make' to "sync; make", or re-define $(MAKE) in your Makefiles doesn't matter - this problem always has a trivial workaround.

N/A