When I try to compile php-3.0.15 with the --with-mcrypt flag, I see the following
error message. 

The mcrypt library is correct installt, I think.



gcc -g -O2   -I.                     -I/usr/local/include    -c functions/mcrypt.c -o functions/mcrypt.o

functions/mcrypt.c: In function `php_minit_mcrypt':
functions/mcrypt.c:139: `MCRYPT_BLOWFISH_448' undeclared (first use in this function)
functions/mcrypt.c:139: (Each undeclared identifier is reported only once
functions/mcrypt.c:139: for each function it appears in.)
functions/mcrypt.c:140: `MCRYPT_DES' undeclared (first use in this function)
functions/mcrypt.c:141: `MCRYPT_3DES' undeclared (first use in this function)
functions/mcrypt.c:142: `MCRYPT_3WAY' undeclared (first use in this function)
functions/mcrypt.c:143: `MCRYPT_GOST' undeclared (first use in this function)
functions/mcrypt.c:144: `MCRYPT_SAFER_64' undeclared (first use in this function)
functions/mcrypt.c:145: `MCRYPT_SAFER_128' undeclared (first use in this function)
functions/mcrypt.c:146: `MCRYPT_CAST_128' undeclared (first use in this function)
functions/mcrypt.c:147: `MCRYPT_XTEA' undeclared (first use in this function)
functions/mcrypt.c:148: `MCRYPT_RC2_1024' undeclared (first use in this function)
functions/mcrypt.c:149: `MCRYPT_TWOFISH_128' undeclared (first use in this function)
functions/mcrypt.c:150: `MCRYPT_TWOFISH_192' undeclared (first use in this function)
functions/mcrypt.c:151: `MCRYPT_TWOFISH_256' undeclared (first use in this function)
functions/mcrypt.c:152: `MCRYPT_BLOWFISH_128' undeclared (first use in this function)
functions/mcrypt.c:153: `MCRYPT_BLOWFISH_192' undeclared (first use in this function)
functions/mcrypt.c:154: `MCRYPT_BLOWFISH_256' undeclared (first use in this function)
functions/mcrypt.c:155: `MCRYPT_CAST_256' undeclared (first use in this function)
functions/mcrypt.c:156: `MCRYPT_SAFERPLUS' undeclared (first use in this function)
functions/mcrypt.c:157: `MCRYPT_LOKI97' undeclared (first use in this function)
functions/mcrypt.c:158: `MCRYPT_SERPENT_128' undeclared (first use in this function)
functions/mcrypt.c:159: `MCRYPT_SERPENT_192' undeclared (first use in this function)
functions/mcrypt.c:160: `MCRYPT_SERPENT_256' undeclared (first use in this function)
functions/mcrypt.c:161: `MCRYPT_RIJNDAEL_128' undeclared (first use in this function)
functions/mcrypt.c:162: `MCRYPT_RIJNDAEL_192' undeclared (first use in this function)
functions/mcrypt.c:164: `MCRYPT_RC2_256' undeclared (first use in this function)
functions/mcrypt.c:165: `MCRYPT_RC2_128' undeclared (first use in this function)
functions/mcrypt.c:166: `MCRYPT_RC6_256' undeclared (first use in this function)
functions/mcrypt.c:167: `MCRYPT_IDEA' undeclared (first use in this function)
functions/mcrypt.c:168: `MCRYPT_RC6_128' undeclared (first use in this function)
functions/mcrypt.c:169: `MCRYPT_RC6_192' undeclared (first use in this function)
functions/mcrypt.c:170: `MCRYPT_RC4' undeclared (first use in this function)
*** Error code 1
make: Fatal error: Command failed for target `functions/mcrypt.o'