Re: Race condition during ncurses installation

[Thomas Dickey]

On Fri, Mar 11, 2016 at 11:20:25PM +0000, Bystricky, Juro wrote:
> Hello ncurses maintainers,
> 
> There is a race condition using parallel make installing ncurses when 
> installing explicit targets:
> 
> make install.libs install.includes
> 
> Both targets install identicall files, often resulting in an error such as :
> /usr/bin/install: cannot create regular file 
> '/data/master-ab/poky/build-ab/tmp/work/core2-64-poky-linux/ncurses/6.0+20160213-r0/image/usr/include/termcap.h':
>  File exists
> 
> The race is relatively easy to fix, i.e. add statement such as
> 
> .NOTPARALLEL install.libs install.includes

I don't see that here:

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html

(though there is some discussion in the rationale which may be helpful)

> in the file mk-hdr.awk
> While this would prevent the race, several identical files would be still
> installed twice (still assuming installing via "make install.libs 
> install.includes ").
> 
> Is it fair to assume install.libs is a superset of install.includes?

Something like that - it's not changed for a long time: the description
of both in INSTALL was written in 1994.

> In other words, is
> 
> make install.libs
> 
> meant to be an equivalent to:
> 
> make install.libs install.includes
> 
> BTW, I should mention that "make install.libs install.includes" has been used 
> in Yocto ncurses recipes
> for years (instead of a generic "make install") in order to better granulate 
> installed ncurses components.

I understand that :-)

-- 
Thomas E. Dickey <address@hidden>
http://invisible-island.net
ftp://invisible-island.net

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