why can't disable mmap..
Added by bwalker@musings.com over 10 years ago
I am porting lighttpd over to an embedded system running uCLinux. This system doesn't have an MMU so I'm trying to disable use of mmap.
When I run configure I always see the following:
checking for mmap... yes
And that does not seem correct if I try to disable it.
I'm running the latest stable release of lighttpd.
Here is the confgure line that I used:
./configure --host arm-uclinuxeabi -without-pcre --without-zlib --without-bzip2 --disable-ipv6 --disable-lfs --enable-static --enable-mmap=no
I've attached the gory details of configure output if you are interested.
Thanks for any help you can provide.
-brad walker
| configure-out.txt (12.7 KB) configure-out.txt | Output from configure |
Replies (3)
RE: why can't disable mmap.. - Added by darix about 10 years ago
well the configure check for mmap works. so your libc/kernel headers seem to offer it.
RE: why can't disable mmap.. - Added by stbuehler about 10 years ago
lighttpd relies in many places on the "fact" that dereferencing NULL (with a small offset) results in SIGSEGV. Running without MMU breaks that...
Also uCLinux relies on mmap() for memory allocation, so it certainly has to be present.
RE: why can't disable mmap.. - Added by bwalker@musings.com about 10 years ago
I'm aware that uCLinux relies on mmap() for memory allocation.
My question really boils down to the configure script testing for mmap() when I tell it not to.
That doesn't seem correct me regardless of if the system provides it or not.