Hello. I have installed the source of RPM 3.23.35 (Mysql,client and devel) without problems. But when I execute a makefile of a easy program this error appears: /usr/lib/mysql/libmysqlclient.a(my_compress.o): In function `my_uncompress': my_compress.o(.text+0x97): undefined reference to `uncompress' /usr/lib/mysql/libmysqlclient.a(my_compress.o): In function `my_compress_alloc': my_compress.o(.text+0x12b): undefined reference to `compress' collect2: ld returned 1 exit status make: *** [prueba] Error 1 The same program and makefile executed with devel 3.22.25 (my old version of mysql) woks fine. Thanks for your help. Iñaki de Miguel (Serconsur)