The make error message appears in the Raspberry PI source code project
Build environment: Ubuntu14.04 32-bit system

scripts/sign-file.c:25:30: fatal error: openssl/opensslv.h: No such file or directory
 #include <openssl/opensslv.h>
                              ^
compilation terminated.
make[1]: *** [scripts/sign-file] Error 1
make: *** [scripts] Error 2

solution

$ sudo apt-get install libssl-dev

After the installation is complete, re-execute the make command.

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