André (and any others interested in speeding up link times at the expense of a doubling in disk usage),
The attached script works for me. I have set its executable bit and
placed it in my path, using it as
$ make CXX=my_g++
Please check that make invokes g++ as
g++ ... -MT file.lo -MD ...
in the subdirs and as
g++ ... -c -o file.o ..
in the main src dir.
If not, you'll need to change the sed expression accordingly.
Strictly speaking, you need invoke my_g++ only when compiling, but it
doesn't hurt when linking. Having compiled all code using my_g++ I
get:
$ rm -f lyx-qt lyx-xforms lyx
$ time make CXX=my_g++
real 1m49.288s
user 0m54.050s
sys 0m4.190s
Ie, at least a halving in link times. Hope this helps, but be warned,
you pay in terms of disk-footprint
'size' stats are unchanged but 'ls' reports a doubling in the
executable size.
BEFORE
$ size lyx-qt lyx-xforms
text data bss dec hex filename
3502915 165400 25652 3693967 385d8f lyx-qt
3326990 85852 51188 3464030 34db5e lyx-xforms
AFTER
$ size lyx-qt lyx-xforms
text data bss dec hex filename
3504279 164956 25652 3694887 386127 lyx-qt
3328366 85408 51188 3464962 34df02 lyx-xforms
$ ls -l lyx-qt lyx-xforms
-rwxrwxr-x 1 angus angus 168349888 Nov 4 23:43 lyx-qt
-rwxrwxr-x 1 angus angus 123573147 Nov 4 23:42 lyx-xforms
--
Angus
my_g++
Description: application/shellscript
