Hi, all Configuring guile-1.8.1 on AIX5.1 failed: checking whether sethostname is declared... no checking for library containing crypt... none required checking for __gmpz_init in -lgmp... no configure: error: GNU MP not found, see README Checking in Config.log: configure:39180: checking for __gmpz_init in -lgmp configure:39215: gcc -o conftest -g -O2 -I$HOME/install/include -L$HOME/install/lib conftest.c -lgmp -lm -lltdl >&5 ld: 0711-317 ERROR: Undefined symbol: .__gmpz_init I have installed gmp-4.2.1 in $HOME/install, and checked successfully. I have seen the mail before and tried: #include int main () { mpz_import (0, 0, 0, 0, 0, 0, 0); return 0; } $ gcc -o foo -g -O2 -I$HOME/install/include -L$HOME/install/lib foo.c -lgmp -lm foo.c:7:4: warning: no newline at end of file ld: 0711-317 ERROR: Undefined symbol: .__gmpz_import ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. collect2: ld returned 8 exit status Thank you for your help. Lily Wong