error: expected expression before '/' token

Question

I'm no C expert, and am getting this error when trying to cross-compile a C application:

src/ls_sqlite3.c:522: error: expected expression before '/' token

The offending line is this:

sqlite3_busy_timeout(conn, lua_tonumber(L,3)); // TODO: remove this

I suspect the use of // for comments is not allowed by certain compilers or through some settings, but Google didn't help. Does someone know?

Thank you.

Answer 1

In the old C standard only allowed comments are /*...*/. Only from C99 standards onwards // are allowed as comments.

Answer 2

Since you didn't mention your compiler. You could change it to c-style comments

sqlite3_busy_timeout(conn, lua_tonumber(L,3)); /* TODO: remove this */

Check your compilers manual for a compatibility switch for c++ style comments.