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-rw-r--r--INSTALL10
1 files changed, 10 insertions, 0 deletions
diff --git a/INSTALL b/INSTALL
index 659f75a97f..6470cd3d25 100644
--- a/INSTALL
+++ b/INSTALL
@@ -120,6 +120,16 @@ if 'CFLAGS' is specified it must enable optimization. For example:
compiler flags which target a later instruction set architecture
(ISA).
+'--with-extra-version-id=STRING'
+ Use STRING as part of the fingerprint that is used by the dynamic
+ linker to detect an incompatible version of 'libc.so'. For
+ example, STRING could be the full package version and release
+ string used by a distribution build of the GNU C Library. This
+ way, concurrent process creation during a package update will fail
+ with an error message, _error while loading shared libraries:
+ /lib64/libc.so.6: ld.so/libc.so mismatch detected (upgrade in
+ progress?)_, rather than crashing mysteriously.
+
'--with-timeoutfactor=NUM'
Specify an integer NUM to scale the timeout of test programs. This
factor can be changed at run time using 'TIMEOUTFACTOR' environment