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 /tmp/ccBBJEB8.o: In function `ping_sql':
pingsql.c:(.text+0x7c): undefined reference to `mysql_init'
pingsql.c:(.text+0xe1): undefined reference to `mysql_real_connect'
pingsql.c:(.text+0xff): undefined reference to `mysql_close'
pingsql.c:(.text+0x119): undefined reference to `mysql_connect'
pingsql.c:(.text+0x198): undefined reference to `mysql_real_escape_string'
collect2: ld ·µ»Ø 1
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#gcc -o pingsql pingsql.c -lmysqlclient -I/usr/local/mysql/include/mysql/ -L/usr/local/mysql/lib/mysql