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remove outdated note on pthreads

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Matthew Flatt 2010-09-01 18:11:37 -06:00
parent a0b8a94d8b
commit aa74cb748e
1 changed files with 0 additions and 20 deletions
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src/README
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@ -251,26 +251,6 @@ For a build without `--prefix' (or with `--enable-origtree') and without
`--enable-shared', you can safely move the install tree, because all
file references within the installation are relative.
OpenGL, Unix, and pthreads
--------------------------
On some Unix systems, programs that use the OpenGL library must also
link to pthreads. To use GRacket's OpenGL support on these systems,
GRacket must be configured with the `--enable-pthread' option.
Unfortunately, Racket's normal stack handling and use of signals (for
its own thread scheduling) do not interact well with pthreads. Thus,
when pthreads are enabled, Racket and GRacket cannot use interupt
timers, and the stack is limited to 1MB. These restrictions can degrade
performance and thread-responsiveness.
If `configure' detects that OpenGL requires -lpthread for linking, and
if `--enable-pthread' is not specified, `configure' prints a warning and
disables GL support. On some systems, including at least FreeBSD with
the MESA GL implementation (but not the NVIDIA implementation, which
does not need pthreads), `configure' cannot detect the need for
pthreads. On these platforms, GL support will be included in GRacket,
but it will not work properly unless `--enable-pthread' is specified.
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CGC versus 3m
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