title: How to install PECL extensions on ubuntu?
body: <p>I'm really new to Ubuntu I wanted to use the PECL id3 package so I shifted from Windows to Ubuntu.</p>
  
  <p>I installed php5, apache2, libcurl, php5-dev, php-pear but when I try to install the php_http extension it is giving an error. It asked for zlib and libcurl and I just hit return key to select the default  then this happens with an error at the end:</p>
  
  <pre><code>maniteja@maniteja:~$ sudo pecl install pecl_http
  downloading pecl_http-2.0.4.tgz ...
  Starting to download pecl_http-2.0.4.tgz (152,350 bytes)
  .....done: 152,350 bytes
  64 source files, building
  running: phpize
  Configuring for:
  PHP Api Version:         20121113
  Zend Module Api No:      20121212
  Zend Extension Api No:   220121212
  Enable extended HTTP support [yes] : 
  where to find zlib [/usr] : 
  where to find libcurl [/usr] : 
  where to find libevent [/usr] : 
  building in /tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4
  running: /tmp/pear/temp/pecl_http/configure --with-http --with-http-zlib-dir=/usr     --with-http-libcurl-dir=/usr --with-http-libevent-dir=/usr
  checking for grep that handles long lines and -e... /bin/grep
  checking for egrep... /bin/grep -E
  checking for a sed that does not truncate output... /bin/sed
  checking for cc... cc
  checking whether the C compiler works... yes
  checking for C compiler default output file name... a.out
  checking for suffix of executables...
  checking whether we are cross compiling... no
  checking for suffix of object files... o
  checking whether we are using the GNU C compiler... yes
  checking whether cc accepts -g... yes
  checking for cc option to accept ISO C89... none needed
  checking how to run the C preprocessor... cc -E
  checking for icc... no
  checking for suncc... no 
  checking whether cc understands -c and -o together... yes
  checking for system library directory... lib
  checking if compiler supports -R... no
  checking if compiler supports -Wl,-rpath,... yes
  checking build system type... x86_64-unknown-linux-gnu
  checking host system type... x86_64-unknown-linux-gnu
  checking target system type... x86_64-unknown-linux-gnu
  checking for PHP prefix... /usr
  checking for PHP includes... -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib
  checking for PHP extension directory... /usr/lib/php5/20121212
  checking for PHP installed headers prefix... /usr/include/php5
  checking if debug is enabled... no
  checking if zts is enabled... no
  checking for re2c... no
  configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
  checking for gawk... no
  checking for nawk... nawk
  checking if nawk is broken... no
  checking whether to enable extended HTTP support... yes, shared
  checking for egrep... (cached) /bin/grep -E
  checking for a sed that does not truncate output... (cached) /bin/sed
  checking how to run the C preprocessor... cc -E
  checking for ANSI C header files... yes
  checking for sys/types.h... yes
  checking for sys/stat.h... yes
  checking for stdlib.h... yes
  checking for string.h... yes
  checking for memory.h... yes
  checking for strings.h... yes
  checking for inttypes.h... yes
  checking for stdint.h... yes
  checking for unistd.h... yes
  checking netdb.h usability... yes
  checking netdb.h presence... yes
  checking for netdb.h... yes
  checking for unistd.h... (cached) yes
  checking for gethostname... yes
  checking for getdomainname... yes
  checking for getservbyport... yes  
  checking for getservbyport_r... yes
  checking for getservbyname... yes
  checking for getservbyname_r... yes
  checking for zlib.h... found in /usr
  checking for zlib version &gt;= 1.2.0.4... 1.2.7
  checking for curl/curl.h... found in /usr
  checking for curl-config... found: /usr/bin/curl-config
  checking for curl version &gt;= 7.18.2... 7.29.0
  checking for SSL support in libcurl... yes
  checking for openssl support in libcurl... no
  checking for gnutls support in libcurl... no
  checking for bundled SSL CA info... /etc/ssl/certs/ca-certificates.crt
  checking for event2/event.h... not found
  configure: WARNING: continuing without libevent support
  checking for ext/raphf support... PHP Warning:  PHP Startup: Unable to load dynamic    library '/usr/lib/php5/20121212/readline.so' - /usr/lib/php5/20121212/readline.so:   undefined symbol: rl_on_new_line in Unknown on line 0
  no
      checking for ext/propro support... PHP Warning:  PHP Startup: Unable to load dynamic    library '/usr/lib/php5/20121212/readline.so' - /usr/lib/php5/20121212/readline.so: undefined symbol: rl_on_new_line in Unknown on line 0
  no
  checking whether to depend on extensions which have been built shared... yes
  checking for ext/hash support... PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/readline.so' - /usr/lib/php5/20121212/readline.so: undefined symbol: rl_on_new_line in Unknown on line 0
  yes
  checking for php_hash.h... /usr/include/php5/ext/hash
  checking for ext/json support... PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/readline.so' - /usr/lib/php5/20121212/readline.so: undefined symbol: rl_on_new_line in Unknown on line 0
  yes
  checking for ext/iconv support... PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/readline.so' - /usr/lib/php5/20121212/readline.so: undefined symbol: rl_on_new_line in Unknown on line 0
  yes
  checking whether to add a dependency on ext/hash... yes
  checking whether to add a dependency on ext/iconv... yes
  checking whether to add a dependency on ext/json... yes
  checking how to print strings... printf
  checking for a sed that does not truncate output... (cached) /bin/sed
  checking for fgrep... /bin/grep -F
  checking for ld used by cc... /usr/bin/ld
  checking if the linker (/usr/bin/ld) is GNU ld... yes
  checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
  checking the name lister (/usr/bin/nm -B) interface... BSD nm
  checking whether ln -s works... yes
  checking the maximum length of command line arguments... 1572864
  checking whether the shell understands some XSI constructs... yes
  checking whether the shell understands "+="... yes
  checking how to convert x86_64-unknown-linux-gnu file names to x86_64-unknown-linux-gnu format... func_convert_file_noop
  checking how to convert x86_64-unknown-linux-gnu file names to toolchain format...     func_convert_file_noop
  checking for /usr/bin/ld option to reload object files... -r
  checking for objdump... objdump
  checking how to recognize dependent libraries... pass_all
  checking for dlltool... no
  checking how to associate runtime and link libraries... printf %s\n
  checking for ar... ar
  checking for archiver @FILE support... @
  checking for strip... strip
  checking for ranlib... ranlib
  checking for gawk... (cached) nawk
  checking command to parse /usr/bin/nm -B output from cc object... ok
  checking for sysroot... no
  checking for mt... mt
  checking if mt is a manifest tool... no
  checking for dlfcn.h... yes
  checking for objdir... .libs
  checking if cc supports -fno-rtti -fno-exceptions... no
  checking for cc option to produce PIC... -fPIC -DPIC 
  checking if cc PIC flag -fPIC -DPIC works... yes
  checking if cc static flag -static works... yes
  checking if cc supports -c -o file.o... yes
  checking if cc supports -c -o file.o... (cached) yes
  checking whether the cc linker (/usr/bin/ld -m elf_x86_64) supports shared   libraries...     yes
  checking whether -lc should be explicitly linked in... no
  checking dynamic linker characteristics... GNU/Linux ld.so
  checking how to hardcode library paths into programs... immediate
  checking whether stripping libraries is possible... yes
  checking if libtool supports shared libraries... yes
  checking whether to build shared libraries... yes
  checking whether to build static libraries... no
  configure: creating ./config.status
  config.status: creating config.h
  config.status: executing libtool commands
  running: make
          /bin/bash /tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/libtool     --mode=compile   cc  -I. -I/tmp/pear/temp/pecl_http -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/include -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/main -I/tmp/pear/temp/pecl_http -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -I/usr/include/php5/ext/hash  -DHAVE_CONFIG_H  -g -O2   -c /tmp/pear/temp/pecl_http/php_http_buffer.c -o php_http_buffer.lo
  libtool: compile:  cc -I. -I/tmp/pear/temp/pecl_http -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/include -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/main -I/tmp/pear/temp/pecl_http -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -I/usr/include/php5/ext/hash -DHAVE_CONFIG_H -g -O2 -c /tmp/pear/temp/pecl_http/php_http_buffer.c  -fPIC -DPIC -o .libs/php_http_buffer.o
  /bin/bash /tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/libtool --mode=compile cc  -I. -I/tmp/pear/temp/pecl_http -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/include -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/main -I/tmp/pear/temp/pecl_http -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -I/usr/include/php5/ext/hash  -DHAVE_CONFIG_H  -g -O2   -c /tmp/pear/temp/pecl_http/php_http.c -o php_http.lo
  libtool: compile:  cc -I. -I/tmp/pear/temp/pecl_http -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/include -I/tmp/pear/temp/pear-build-rootcjY5MM/pecl_http-2.0.4/main -I/tmp/pear/temp/pecl_http -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -I/usr/include/php5/ext/hash -DHAVE_CONFIG_H -g -O2 -c /tmp/pear/temp/pecl_http/php_http.c  -fPIC -DPIC -o .libs/php_http.o
  In file included from /usr/include/php5/ext/spl/spl_iterators.h:27:0,
               from /tmp/pear/temp/pecl_http/php_http_api.h:29,
               from /tmp/pear/temp/pecl_http/php_http.c:13:
  /usr/include/php5/ext/pcre/php_pcre.h:29:18: fatal error: pcre.h: No such file or directory
  compilation terminated.
  make: *** [php_http.lo] Error 1
  ERROR: `make' failed
  </code></pre>
  
  <p>`  </p>