====== LSWS PHP/LSAPI Build troubleshooting guide (Archive Only) ====== ===== Preamble ===== The following is a list of common error messages encountered during the php build stage for LiteSpeed Web Server (LSWS) and their relevant fixes. The general PHP/LSAPI build procedures are described in [[http://www.litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:php:lsapi|PHP with LSAPI Compile/Install How-To]]. As of this writing, the latest PHP version is 5.2.16. The latest LSAPI released is version 5.5. We will use php 5.2.16 and LSAPI 5.5 as an example to build LSPHP. In most cases, control panel users do not need to build PHP manually anymore, most of the time control panels have pre-built RPM/APT packages. For users not using a control panel, you may use the LiteSpeed repositories for CentOS/Debian/Ubuntu systems. This list consists of archived documents which may contain out of date information but may also provide a good starting place in solving any errors you encounter while compiling PHP. PHP compilation is a general topic and is not limited to LSWS. If you do not find an answer here, you are free to "google" your error message for solutions. Again, we recommend you to go through RPM/APT packages installation process instead of PHP compiling unless you have a "have to" reason to compile manually. ===== Procedures ===== 1. Pre-requisites Make sure all the build tools are installed and ready: patch, gcc, glibc, libstdc++, gcc-c++, binutils, libtool, autoconf, make CentOS: yum install patch gcc glibc libstdc++ gcc-c++ binutils libtool autoconf make CentOS (64bit): yum install patch.x86_64 gcc.x86_64 glibc.x86_64 libstdc++.x86_64 gcc-c++.x86_64 \ binutils.x86_64 libtool.x86_64 autoconf.x86_64 make.x86_64 Ubuntu (32bit or 64bit): apt-get install patch gcc glibc libstdc++ gcc-c++ binutils libtool autoconf make 2. Download PHP source and unpack it # wget -N http://us2.php.net/get/php-5.2.16.tar.gz/from/us.php.net/mirror # tar -zxf php-5.2.16.tar.gz 3. Download LSAPI source and unpack it # cd php-5.2.16/sapi # wget -N http://www.litespeedtech.com/packages/lsapi/php-litespeed-5.5.tgz # tar -zxf php-litespeed-5.5.tgz **Note:** LSAPI 5.5 is shipped with PHP source from PHP 5.3 onward. This step can be skipped if you build PHP 5.3 or above. 4. cd to php source directory and rebuild configure script # cd .. # touch ac* # ./buildconf --force ===== Possible errors and their fixes ===== **Note:** OpenSUSE error fixes are generally the same as the CentOS fixes listed below except that "yum" should be replaced with "zypper". **Error Message:** Forcing buildconf ./buildconf: line 41: make: command not found **Reason:** Missing 'make' program in the build system. **Fix:** Install 'make' program. CentOS: yum install make CentOS (64bit): yum install make.x86_64 Ubuntu (32bit or 64bit): apt-get install make ---- **Error Message:** buildconf: autoconf not found. You need autoconf version 2.13 or newer installed to build PHP from CVS. make: *** [buildmk.stamp] Error 1 or Cannot find autoconf. Please check your autoconf installation and the $PHP_AUTOCONF environment variable. Then, rerun this script. **Cause:** Missing 'autoconf' program in the build system. **Fix:** Install 'autoconf' program. CentOS: yum install autoconf(.x86_64) Ubuntu (32bit or 64bit): apt-get install autoconf ---- **Error Message:** Forcing buildconf buildconf: checking installation... buildconf: autoconf version 2.59 (ok) buildconf: Your version of autoconf likely contains buggy cache code. Running vcsclean for you. To avoid this, install autoconf-2.13. Can't figure out your VCS, not cleaning. **Cause:** 'autoconf' program is buggy in the build system. **Fix:** Install 'autoconf213' program. CentOS: yum install autoconf213(.x86_64) Ubuntu (32bit or 64bit): apt-get install autoconf2.13 export PHP_AUTOCONF=/usr/bin/autoconf-2.13 export PHP_AUTOHEADER=/usr/bin/autoheader-2.13 ===== Configure/Compilation ===== 4. Configure/Compile PHP with LSAPI (LSPHP) # './configure' '--prefix=/lsphp5' '--with-litespeed' '--with-libdir=lib64' \ '--disable-debug' '--with-pic' '--disable-rpath' '--without-pear' '--with-bz2' '--with-exec-dir=/usr/bin' \ '--with-freetype-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--enable-gd-native-ttf' '--without-gdbm' '--with-t1lib=/usr' \ '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr' '--with-openssl' '--with-pcre-regex=shared,/usr' \ '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' \ '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' '--with-kerberos' '--enable-ucd-snmp-hack' '--enable-shmop' \ '--enable-calendar' '--without-mime-magic' '--without-sqlite' '--with-libxml-dir=/usr' '--enable-xml' \ '--with-system-tzdata' '--enable-force-cgi-redirect' '--enable-pcntl' '--with-imap=shared' '--with-imap-ssl' \ '--enable-mbstring=shared' '--enable-mbregex' '--with-ncurses=shared' '--with-gd=shared' '--enable-bcmath=shared' \ '--enable-dba=shared' '--with-db4=/usr' '--with-xmlrpc=shared' '--with-ldap=shared' '--with-ldap-sasl' \ '--with-mysql=shared,/usr' '--with-mysqli=shared,/usr/bin/mysql_config' '--enable-dom=shared' '--with-pgsql=shared' \ '--enable-wddx=shared' '--with-snmp=shared,/usr' '--enable-soap=shared' '--with-xsl=shared,/usr' '--enable-xmlreader=shared' \ '--enable-xmlwriter=shared' '--with-curl=shared,/usr' '--enable-fastcgi' '--enable-pdo=shared' '--with-pdo-odbc=shared,unixODBC,/usr' \ '--with-pdo-mysql=shared,/usr' '--with-pdo-pgsql=shared,/usr' '--with-pdo-sqlite=shared,/usr' '--with-pdo-dblib=shared,/usr' \ '--enable-json=shared' '--enable-zip=shared' '--with-readline' '--with-ssh2' '--enable-dbase=shared' '--with-pspell=shared' \ '--with-mcrypt=shared,/usr' '--with-mhash=shared,/usr' '--with-tidy=shared,/usr' '--with-mssql=shared,/usr' '--enable-sysvmsg=shared' \ '--enable-sysvshm=shared' '--enable-sysvsem=shared' '--enable-posix=shared' '--with-unixODBC=shared,/usr' **Note:** * for 64bit system, '--with-libdir=lib64' should be used in configure option * it saves quite a bit of time to get all needed packages installed in one shot instead of going through each error and fix them. For the example compile options above, just issue the following command to get all the needed packages installed. CentOS 5: yum install libxml2-devel openssl-devel bzip2-devel curl-devel db4-devel libjpeg-devel libpng-devel libXpm-devel \ freetype-devel gmp-devel libc-client-devel openldap-devel libmcrypt-devel libmhash-devel freetds-devel \ libz-devel mysql-devel ncurses-devel pcre-devel unixODBC-devel postgresql-devel sqlite-devel aspell-devel \ readline-devel recode-devel net-snmp-devel libtidy-devel libxslt-devel t1lib-devel CentOS 5 x86_64: yum install libxml2-devel.x86_64 openssl-devel.x86_64 bzip2-devel.x86_64 curl-devel.x86_64 db4-devel.x86_64 \ libjpeg-devel.x86_64 libpng-devel.x86_64 libXpm-devel.x86_64 freetype-devel.x86_64 gmp-devel.x86_64 \ libc-client-devel.x86_64 openldap-devel.x86_64 libmcrypt-devel.x86_64 libmhash-devel.x86_64 freetds-devel.x86_64 \ libz-devel.x86_64 mysql-devel.x86_64 ncurses-devel.x86_64 pcre-devel.x86_64 unixODBC-devel.x86_64 postgresql-devel.x86_64 \ sqlite-devel.x86_64 aspell-devel.x86_64 readline-devel.x86_64 recode-devel.x86_64 net-snmp-devel.x86_64 \ libtidy-devel.x86_64 libxslt-devel.x86_64 t1lib-devel.x86_64 Due to package name change, use followings for CentOS 6. You may need [[http://fedoraproject.org/wiki/EPEL/FAQ#How_can_I_install_the_packages_from_the_EPEL_software_repository.3F|EPEL repository]] to get them all installed CentOS 6: yum install libxml2-devel openssl-devel bzip2-devel libcurl-devel db4-devel libjpeg-devel libpng-devel libXpm-devel \ freetype-devel gmp-devel libc-client-devel openldap-devel libmcrypt-devel mhash-devel freetds-devel \ zlib-devel mysql-devel ncurses-devel pcre-devel unixODBC-devel postgresql-devel sqlite-devel aspell-devel \ readline-devel recode-devel net-snmp-devel libtidy-devel libxslt-devel t1lib-devel CentOS 6 x86_64: yum install libxml2-devel.x86_64 openssl-devel.x86_64 bzip2-devel.x86_64 libcurl-devel.x86_64 db4-devel.x86_64 \ libjpeg-devel.x86_64 libpng-devel.x86_64 libXpm-devel.x86_64 freetype-devel.x86_64 gmp-devel.x86_64 \ libc-client-devel.x86_64 openldap-devel.x86_64 libmcrypt-devel.x86_64 mhash-devel.x86_64 freetds-devel.x86_64 \ zlib-devel.x86_64 mysql-devel.x86_64 ncurses-devel.x86_64 pcre-devel.x86_64 unixODBC-devel.x86_64 postgresql-devel.x86_64 \ sqlite-devel.x86_64 aspell-devel.x86_64 readline-devel.x86_64 recode-devel.x86_64 net-snmp-devel.x86_64 \ libtidy-devel.x86_64 libxslt-devel.x86_64 t1lib-devel.x86_64 Ubuntu: apt-get install libxml2-dev libssl-dev libbz2-dev libcurl3-dev libdb4.4-dev libjpeg-dev libpng-dev libXpm-dev \ libfreetype6-dev libt1-dev libgmp3-dev libc-client-dev libldap2-dev libmcrypt-dev libmhash-dev freetds-dev libz-dev \ libmysqlclient15-dev ncurses-dev libpcre3-dev unixODBC-dev postgresql-server-dev-8.3 libsqlite-dev libaspell-dev \ libreadline5-dev librecode-dev libsnmp-dev libtidy-dev libxslt-dev libt1-dev OpenSUSE: zypper install libxml2-devel openssl-devel bzip2-devel libcurl-devel db4-devel libjpeg-devel libpng-devel libXpm-devel \ freetype-devel gmp-devel libc-client-devel openldap-devel libmcrypt-devel mhash-devel freetds-devel \ zlib-devel mysql-devel ncurses-devel pcre-devel unixODBC-devel postgresql-devel sqlite-devel aspell-devel \ readline-devel recode-devel net-snmp-devel libtidy-devel libxslt-devel t1lib-devel OpenSUSE x86_64: zypper install libxml2-devel.x86_64 openssl-devel.x86_64 bzip2-devel.x86_64 libcurl-devel.x86_64 db4-devel.x86_64 \ libjpeg-devel.x86_64 libpng-devel.x86_64 libXpm-devel.x86_64 freetype-devel.x86_64 gmp-devel.x86_64 \ libc-client-devel.x86_64 openldap-devel.x86_64 libmcrypt-devel.x86_64 mhash-devel.x86_64 freetds-devel.x86_64 \ zlib-devel.x86_64 mysql-devel.x86_64 ncurses-devel.x86_64 pcre-devel.x86_64 unixODBC-devel.x86_64 postgresql-devel.x86_64 \ sqlite-devel.x86_64 aspell-devel.x86_64 readline-devel.x86_64 recode-devel.x86_64 net-snmp-devel.x86_64 \ libtidy-devel.x86_64 libxslt-devel.x86_64 t1lib-devel.x86_64 ===== Possible errors and their fixes ===== **Error Message:** Can not patch Suhosin **Cause:** Program 'patch' is missing on the building server. **Fix:** Install 'patch' program CentOS: yum install patch CentOS(64bit): yum install patch.x86_64 Ubuntu: apt-get install patch ---- **Error Message:** Can not make **Cause:** Program 'make' is missing on the building server. **Fix:** Install 'make' program CentOS: yum install make CentOS(64bit): yum install make.x86_64 Ubuntu: apt-get install make **Error Message:** Could not find xml2-config **Cause:** configure option '--with-libxml-dir=/usr' used **BUT** package libxml2-devel is missing. **Fix:** Install 'libxml2-devel' package CentOS: yum install libxml2-devel CentOS(64bit): yum install libxml2-devel.x86_64 Ubuntu: apt-get install libxml2-devel ---- **Error Message:** Could not find evp.h **Cause:** configure option '--with-openssl' used **BUT package openssl-devel(.x86_64) is missing** . **Fix:** CentOS: yum install openssl-devel CentOS(64bit): yum install openssl-devel.x86_64 Ubuntu: apt-get install libssl-dev ---- **Error Message:** checking for BZip2 support... yes checking for BZip2 in default path... not found configure: error: Please reinstall the BZip2 distribution **Cause:** configure option '--with-bz2' used **BUT bzip2-devel(.x86_64) is missing**. **Fix:** CentOS: yum install bzip2-devel CentOS(64bit): yum install bzip2-devel.x86_64 Ubuntu: apt-get install libbz2-dev ---- **Error Message:** checking for cURL support... yes, shared checking if we should use cURL for url streams... no checking for cURL in default path... not found configure: error: Please reinstall the libcurl distribution - easy.h should be in /include/curl/ **ERROR** Could not configure PHP build **Cause:** configure option '--with-curl=shared,/usr' used **but curl-devel(.x86_64) package is missing** Fix: CentOS: yum install curl-devel CentOS(64bit): yum install curl-devel.x86_64 CentOS 6: yum install libcurl-devel CentOS 6(64bit): yum install libcurl-devel.x86_64 Ubuntu: apt-get install libcurl3-dev ---- **Error:** configure: error: DBA: Could not find necessary header file(s). **ERROR** Could not configure PHP build **Cause:** configure with option '--enable-dba=shared' '--with-db4=/usr' **one of DB library packages (DB4) is missing** Fix: CentOS: yum install db4-devel CentOS(64bit): yum install db4-devel.x86_64 Ubuntu: apt-get install libdb4.4-dev ---- **Error Message:** If configure fails try --with-jpeg-dir= configure: error: libpng.(a|so) not found. **ERROR** Could not configure PHP build **Cause:** configure with option '--with-jpeg-dir=/usr' **but libjpeg-devel(.x86_64) package is missing** Fix: CentOS: yum install libjpeg-devel CentOS(64bit): yum install libjpeg-devel.x86_64 Ubuntu: apt-get install libjpeg-dev ---- **Error Message:** configure: error: libpng.(a|so) not found. **ERROR** Could not configure PHP build **Cause:** configure with option '--with-png-dir=/usr' **but libpng-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libpng-devel CentOS(64bit): yum install libpng-devel.x86_64 Ubuntu: apt-get install libpng-dev ---- **Error Message:** configure: error: libXpm.(a|so) not found. **ERROR** Could not configure PHP build **Cause:** configure with '--with-xpm-dir=/usr' **but libXpm-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libXpm-devel CentOS(64bit): yum install libXpm-devel.x86_64 Ubuntu: apt-get install libXpm-dev ---- **Error Message:** configure: error: freetype.h not found. **ERROR** Could not configure PHP build **Cause:** configure with '--with-freetype-dir=/usr' **but freetype-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install freetype-devel CentOS(64bit): yum install freetype-devel.x86_64 Ubuntu: apt-get install libfreetype6-dev ---- **Error Message:** configure: error: Your t1lib distribution is not installed correctly. Please reinstall it. **ERROR** Could not configure PHP build **Cause:** configure with '--with-t1lib=/usr' **but t1lib-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install t1lib-devel CentOS(64bit): yum install t1lib-devel.x86_64 Ubuntu: apt-get install libt1-dev ---- **Error Messages: ** configure: error: Unable to locate gmp.h **ERROR** Could not configure PHP build **Cause:** configure with '--with-gmp' **but gmp-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install gmp-devel CentOS(64bit): yum install gmp-devel.x86_64 Ubuntu: apt-get install libgmp3-dev ---- **Error Message:** checking for U8T_DECOMPOSE... configure: error: utf8_mime2text() has new signature, but U8T_CANONICAL is missing. This should not happen. Check config.log for additional information. **Cause:** configure with '--with-imap=shared' '--with-imap-ssl' but libc-client-devel(.x86_64) package is missing **Fix: ** CentOS: yum install libc-client-devel CentOS(64bit): yum install libc-client-devel.x86_64 Ubuntu: apt-get install libc-client-dev ---- **Error Message:** checking for LDAP support... yes, shared checking for LDAP Cyrus SASL support... yes configure: error: Cannot find ldap.h **Cause:** configure with '--with-ldap=shared' '--with-ldap-sasl' **but openldap-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install openldap-devel CentOS(64bit): yum install openldap-devel.x86_64 Ubuntu: apt-get install libldap2-dev ---- **Error Message:** checking for mcrypt support... yes, shared configure: error: mcrypt.h not found. Please reinstall libmcrypt. **Cause:** configure with '--with-mcrypt=shared,/usr' ** but libmcrypt-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libmcrypt-devel CentOS(64bit): yum install libmcrypt-devel.x86_64 Ubuntu: apt-get install libmcrypt-dev ---- **Error Message:** checking for mhash support... yes, shared configure: error: Please reinstall libmhash - I cannot find mhash.h **Cause:** configure with '--with-mhash=shared,/usr' **but libmhash-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libmhash-devel CentOS(64bit): yum install libmhash-devel.x86_64 CentOS 6: yum install mhash-devel CentOS 6(64bit): yum install mhash-devel.x86_64 Ubuntu: apt-get install libmhash-dev **Error Message:** checking for MSSQL support via FreeTDS... yes, shared configure: error: Directory /usr is not a FreeTDS installation directory **Cause:** configure with option '--with-freetype-dir=/usr' **but freetds-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install freetds-devel CentOS(64bit): yum install freetds-devel.x86_64 Ubuntu: apt-get install freetds-dev ---- **Error Message:** configure: error: Cannot find libz. **ERROR** Could not configure PHP build **Cause:** configure with '--with-zlib' ** but libz-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libz-devel CentOS(64bit): yum install libz-devel.x86_64 CentOS 6: yum install zlib-devel CentOS 6(64bit): yum install zlib-devel.x86_64 Ubuntu: apt-get install libz-dev ---- **Error Message:** configure: error: Cannot find MySQL header files under /usr. Note that the MySQL client library is not bundled anymore! **Cause:** configure with '--with-mysql=shared,/usr' **but mysql-devel(.x86_64) package is missing ** **Fix: ** CentOS: yum install mysql-devel CentOS(64bit): yum install mysql-devel.x86_64 Ubuntu: apt-get install libmysqlclient15-dev ---- **Error Message:** checking for ncurses support... yes, shared not found configure: error: Please reinstall the ncurses distribution **Cause: ** configure with '--with-ncurses=shared' **but ncurses-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install ncurses-devel CentOS(64bit): yum install ncurses-devel.x86_64 Ubuntu: apt-get install ncurses-dev ---- **Error Message:** checking for pcre support... yes, shared not found configure: error: pcre.h not found **Cause:** configure with '--with-pcre=shared,/usr' **but pcre-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install pcre-devel CentOS(64bit): yum install pcre-devel.x86_64 Ubuntu: apt-get install libpcre3-dev ---- **Error Message:** checking for Oracle (OCI8) support... no checking for unixODBC support... configure: error: ODBC header file '/usr/include/sqlext.h' not found! **Cause:** configure with '--with-unixODBC=shared,/usr' **but unixODBC-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install unixODBC-devel CentOS(64bit): yum install unixODBC-devel.x86_64 Ubuntu: apt-get install unixODBC-dev ---- **Error Message:** checking for PostgreSQL support for PDO... yes, shared checking for pg_config... not found configure: error: Cannot find libpq-fe.h. Please specify correct PostgreSQL installation path **Cause:** configure with '--with-pdo-pgsql=shared,/usr' **but postgresql-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install postgresql-devel CentOS(64bit): yum install postgresql-devel.x86_64 Ubuntu: apt-get install postgresql-server-dev-8.3 (aptitude search postgresql | grep dev) ---- **Error Message:** checking for sqlite3 files in default path... not found configure: error: Please reinstall the sqlite3 distribution **Cause: ** configure with '--with-pdo-sqlite=shared,/usr' **but sqlite-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install sqlite-devel CentOS(64bit): yum install sqlite-devel.x86_64 Ubuntu: apt-get install libsqlite-dev ---- **Error Message:** checking for PSPELL support... yes, shared configure: error: Cannot find pspell **Cause:** configure with '--with-pspell=shared' **but aspell-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install aspell-devel CentOS(64bit): yum install aspell-devel.x86_64 Ubuntu: apt-get install libaspell-dev ---- **Error Message:** checking for readline support... yes configure: error: Please reinstall readline - I cannot find readline.h **Cause:** configure with '--with-readline' **but readline-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install readline-devel CentOS(64bit): yum install readline-devel.x86_64 Ubuntu: apt-get install libreadline5-dev ---- **Error Message:** checking for recode support... yes, shared configure: error: Can not find recode.h anywhere under /usr /usr/local /usr /opt. **Cause:** configure with '--with-recode=shared,/usr' **but recode-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install recode-devel CentOS(64bit): yum install recode-devel.x86_64 Ubuntu: apt-get install librecode-dev ---- **Error Message:** checking for init_snmp in -lsnmp... no configure: error: SNMP sanity check failed. Please check config.log for more information. **Cause:** configure with '--with-snmp=shared,/usr' **but net-snmp-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install net-snmp-devel CentOS(64bit): yum install net-snmp-devel.x86_64 Ubuntu: apt-get install libsnmp-dev ---- **Error Message:** checking for TIDY support... yes, shared configure: error: Cannot find libtidy **Cause:** configure with '--with-tidy=shared,/usr' **but libtidy-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libtidy-devel CentOS(64bit): yum install libtidy-devel.x86_64 Ubuntu: apt-get install libtidy-dev ---- **Error Message:** checking for XSL support... yes, shared configure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution **Cause:** configure with '--with-xsl=shared,/usr' **but libxslt-devel(.x86_64) package is missing** **Fix: ** CentOS: yum install libxslt-devel CentOS(64bit): yum install libxslt-devel.x86_64 Ubuntu: apt-get install libxslt-dev ---- **Error Message:** configure: error: recode extension can not be configured together with: imap mysql **Cause:** For php 5.2.9 or later, this is because php-5.2.8-recode.patch isn't applied to php package. **Fix: ** edit file php_source_root/ext/recode/config9.m4, remove the following lines: test "$PHP_IMAP" != "no" && recode_conflict="$recode_conflict imap" test "$PHP_MYSQL" != "no" && recode_conflict="$recode_conflict mysql" ---- **Error Message:** checking for libedit readline replacement... yes configure: error: Please reinstall libedit - I cannot find readline.h **Cause:** configure with '--with-libedit', however, libedit-devel package is missing **Fix: ** CentOS: yum install libedit-devel CentOS64: yum install libedit-devel.x86_64 Ubuntu: apt-get install libedit-dev ---- **Error Message:** /usr/bin/ld: cannot find -lltdl **Cause:** system is missing libltdl.so **Fix: ** CentOS: yum install libtool-ltdl-devel CentOS64: yum install libtool-ltdl-devel.x86_64 Ubuntu: apt-get install libtool-ltdl-dev