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-rw-r--r--src/map/mio/mio.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/map/mio/mio.c b/src/map/mio/mio.c
index e0000c38..37ba82c2 100644
--- a/src/map/mio/mio.c
+++ b/src/map/mio/mio.c
@@ -206,6 +206,9 @@ int Mio_CommandReadLibrary( Abc_Frame_t * pAbc, int argc, char **argv )
usage:
fprintf( pErr, "usage: read_library [-vh]\n");
fprintf( pErr, "\t read the library from a genlib file\n" );
+ fprintf( pErr, "\t (if the library contains more than one gate\n" );
+ fprintf( pErr, "\t with the same Boolean function, only the first gate\n" );
+ fprintf( pErr, "\t in the order of their appearance in the file is used)\n" );
fprintf( pErr, "\t-h : enable verbose output\n");
return 1; /* error exit */
}