prepare env

~/C/libserialport/.gitignore

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+port_info

~/C/libserialport/README.md

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+Download `libserialport` library.
+
+```sh
+git clone git://sigrok.org/libserialport
+```
+
+For **build** code use `build` script or build files manually.
+
+Example:
+
+```sh
+export C_INCLUDE_PATH=<path/to/libserialport>
+export LIBRARY_PATH=<path/to/libserialport/.libs>
+
+gcc -static -Wall -O3 -o <output_filename> <file.c> -lserialport
+```

~/C/libserialport/build

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+#!/bin/sh
+#
+# build - script for build all files.
+#
+# Alexander Popov <iiiypuk@fastmail.fm>
+
+export C_INCLUDE_PATH=$HOME/Git/libserialport
+export LIBRARY_PATH=$HOME/Git/libserialport/.libs
+
+for file in \
+    port_info.c
+do
+    gcc -static -Wall -O3 -o ${file%.*} $file -lserialport
+done

~/C/libserialport/clear

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+#!/bin/sh
+#
+# clear - script for delete all builded files.
+#
+# Alexander Popov <iiiypuk@fastmail.fm>
+
+rm port_info