Hi, I'm trying to build MonetDB from source and running into an error during configure. Running ./configure gives: ... ... checking for SHA256... yes checking for SHA384... yes checking for SHA512... yes checking for pcre... yes checking whether pcre comes with UTF-8 support... no configure: error: PCRE library not found but required for MonetDB5 At the bottom of the email is the error in the config.log. pcretest -C gives me: PCRE version 8.38 2015-11-23 Compiled with:q 8-bit support UTF-8 support Unicode properties support No just-in-time compiler support Newline sequence is LF \R matches all Unicode newlines Internal link size = 2 POSIX malloc threshold = 10 Parentheses nest limit = 250 Default match limit = 10000000 Default recursion depth limit = 10000000 Match recursion uses stack The issue, I think, is I have PCRE version 8.38 built in a non-standard location, /home/john/monetdb_prereq/pcre export pcre_LIBS=-L/home/john/monetdb_prereq/pcre/lib export pcre_CFLAGS=-I/home/john/monetdb_prereq/pcre/include Any idea what I'm missing? Thanks, John configure:20861: checking for SHA512 configure:20861: gcc -o conftest -g -O2 conftest.c -lssl -lcrypto -ldl -lz >&5 configure:20861: $? = 0 configure:20861: result: yes configure:20901: checking for pcre configure:20966: result: yes configure:20971: checking whether pcre comes with UTF-8 support configure:20992: gcc -o conftest -g -O2 -I/home/john/monetdb_prereq/pcre/include conftest.c -L/home/john/monetdb_prereq/pcre/lib >&5 /tmp/ccRjfKcQ.o: In function `main': /home/john/MonetDB-11.21.17/conftest.c:66: undefined reference to `pcre_config' collect2: ld returned 1 exit status configure:20992: $? = 1 configure: program exited with status 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "MonetDB" | #define PACKAGE_TARNAME "MonetDB" | #define PACKAGE_VERSION "11.21.17" | #define PACKAGE_STRING "MonetDB 11.21.17" | #define PACKAGE_BUGREPORT "info@monetdb.org" | #define PACKAGE_URL "http://www.monetdb.org/" | #define PACKAGE "MonetDB" | #define VERSION "11.21.17" | #define HOST "x86_64-unknown-linux-gnu" | #define MONETDB_RELEASE "Jul2015-SP3" | #define HAVE_CONSOLE 1 | #define MONETDB5_PASSWDHASH "SHA512" | #define STDC_HEADERS 1 | #define HAVE_SYS_TYPES_H 1 | #define HAVE_SYS_STAT_H 1 | #define HAVE_STDLIB_H 1 | #define HAVE_STRING_H 1 | #define HAVE_MEMORY_H 1 | #define HAVE_STRINGS_H 1 | #define HAVE_INTTYPES_H 1 | #define HAVE_STDINT_H 1 | #define HAVE_UNISTD_H 1 | #define __EXTENSIONS__ 1 | #define _ALL_SOURCE 1 | #define _GNU_SOURCE 1 | #define _POSIX_PTHREAD_SEMANTICS 1 | #define _TANDEM_SOURCE 1 | #define SIZEOF_LONG 8 | #define HAVE_DLFCN_H 1 | #define LT_OBJDIR ".libs/" | #define NDEBUG 1 | #define DIFF "diff" | #define DIR_SEP '/' | #define DIR_SEP_STR "/" | #define PATH_SEP ':' | #define PATH_SEP_STR ":" | #define SO_PREFIX "lib" | #define SO_EXT ".so" | #define HAVE_LIBBZ2 1 | #define HAVE_MALLOPT 1 | #define HAVE_PTHREAD_H 1 | #define HAVE_SEMAPHORE_H 1 | #define HAVE_SCHED_H 1 | #define HAVE_PTHREAD_KILL 1 | #define HAVE_PTHREAD_SIGMASK 1 | #define HAVE_PTHREAD_SETSCHEDPRIO 1 | #define HAVE_LIBPTHREAD 1 | #define HAVE_LIBREADLINE 1 | #define HAVE_ICONV 1 | #define ICONV_CONST | #define HAVE_UUID 1 | #define HAVE_MD5 1 | #define HAVE_RIPEMD160 1 | #define HAVE_SHA1 1 | #define HAVE_SHA224 1 | #define HAVE_SHA256 1 | #define HAVE_SHA384 1 | #define HAVE_SHA512 1 | #define HAVE_OPENSSL 1 | /* end confdefs.h. */ | #include <pcre.h> | int | main () | { | int rc; pcre_config(PCRE_CONFIG_UTF8, &rc); exit(!rc); | ; | return 0; | } configure:20996: result: no configure:21021: error: PCRE library not found but required for MonetDB5