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-rw-r--r--nuttx/configs/z80sim/README.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/nuttx/configs/z80sim/README.txt b/nuttx/configs/z80sim/README.txt
index 50be916e1..ff9754c04 100644
--- a/nuttx/configs/z80sim/README.txt
+++ b/nuttx/configs/z80sim/README.txt
@@ -17,4 +17,18 @@ compatible with this build. First start with the usual steps
unpack
cd sdcc
./configure
+
+But before making, we need to apply a patch to the SDCC 2.6.0 source
+so that the z80 assembler can handle long symbol names
+
+ Apply sdcc-2.6.0-asz80-symlen.patch
+ cd sdcc/device/lib
+
+Then make the SDCC binaries
+
+ cd sdcc
make
+
+and install SDCC:
+
+ sudo make install