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-rw-r--r--man/man1/install.112
1 files changed, 11 insertions, 1 deletions
diff --git a/man/man1/install.1 b/man/man1/install.1
index e070ffba..8a3155e7 100644
--- a/man/man1/install.1
+++ b/man/man1/install.1
@@ -40,7 +40,17 @@ can safely be repeated to rebuild the system from scratch.
The system uses different threading implementations on Linux 2.6 and
later kernels than on 2.4 and earlier;
and on FreeBSD 5 and later kernels than on FreeBSD 4 and earlier.
-Running binaries from one class on another may not work.
+Running binaries from one class on another will not work.
+.PP
+Some Linux 2.6 systems (e.g., Gentoo) do not use the new NPTL pthread library
+even though the kernel supports them. On these systems, plan9port must
+fall back on the threading code intended for Linux 2.4. To accomplish this,
+.I INSTALL
+checks whether the running system uses NPTL and sets
+.B SYSVERSION
+in
+.B \*9/config
+accordingly.
.SH FILES
.TP
.B \*9/lib/moveplan9.files