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-rw-r--r--INSTALL8
1 files changed, 7 insertions, 1 deletions
diff --git a/INSTALL b/INSTALL
index a56c227..3c9c429 100644
--- a/INSTALL
+++ b/INSTALL
@@ -5,6 +5,12 @@ I use gcc 6.1.0 and 4.1.2, but the code should compile with any standards
compliant compiler.
Gcc is available at http://gcc.gnu.org.
+POSIX compliant versions of diff and grep are required for zdiff and zgrep.
+
+(Option -L of zgrep fails (prints wrong results, returns wrong status, and
+even hangs) when using GNU grep versions 3.2 to 3.4 inclusive because of a
+wrong change in the exit status of grep, which was reverted in GNU grep 3.5).
+
Compressors for bzip2, gzip and lzip formats are required to run the tests.
If you are installing zutils along with GNU gzip and want to keep the
@@ -69,7 +75,7 @@ After running 'configure', you can run 'make' and 'make install' as
explained above.
-Copyright (C) 2009-2020 Antonio Diaz Diaz.
+Copyright (C) 2009-2021 Antonio Diaz Diaz.
This file is free documentation: you have unlimited permission to copy,
distribute, and modify it.