Asked  8 Months ago    Answers:  5   Viewed   49 times

I'm just finished installing Ubuntu 13.10.

I want try Phalcon, and when I build the source (, I have this error :

     from /home/fabrice/Downloads/cphalcon/build/32bits/phalcon.c:204:
/usr/include/php5/ext/pcre/php_pcre.h:29:18: fatal error: pcre.h: No such file or directory
 #include "pcre.h"
compilation terminated.
make: *** [phalcon.lo] Erreur 1

My installation of lamp is :

sudo apt-get install -y apache2 php5 mysql-server libapache2-mod-php5 php5-mysql php5-curl php5-imagick php5-mcrypt php5-memcache php5-sqlite php5-xdebug php-apc php5-intl php-mongo php5-dev gcc

Can anybody help me ?



The latest version of Phalcon uses PCRE libraries.

You can install them like so:

sudo apt-get install libpcre3-dev

and then try and install Phalcon again

For CentOS you will need to use

sudo yum install pcre-devel

Credits: @xgretsch

For Mac you can use

brew install pcre

Credits @Brandon Romano

For Mac without brew

Go to and download latest pcre:,

tar -xzvf pcre-8.42.tar.gz
cd pcre-8.42
./configure --prefix=/usr/local/pcre-8.42
make install
ln -s /usr/local/pcre-8.42 /usr/sbin/pcre
ln -s /usr/local/pcre-8.42/include/pcre.h /usr/include/pcre.h

Credits @user1377324

Wednesday, March 31, 2021
answered 8 Months ago

I think there's been a misunderstanding. include path should point to a folder containing PHP files, not PHP interpreter!

Here's where you need to set the address:

enter image description here

As the other answer pointed out, you can find the path to your PHP interpreter using which php or which php5. Then you need to enter the path in the red box numbered 2.

Wednesday, March 31, 2021
answered 8 Months ago

The Ubuntu people build OpenSSL without SSLv2 support because the protocol has known security issues. So that's why you can't find SSLv2_method in their library even though you can find it when you compile the library yourself.

Ubuntu build logs are publicly available. You can see in the oneiric-i386.openssl_1.0.0e log that the library gets configured with the -no-ssl2 option, which disables support for SSLv2.

./Configure --prefix=/usr --openssldir=/usr/lib/ssl --libdir=lib/i386-linux-gnu no-idea no-mdc2 no-rc5 zlib  enable-tlsext no-ssl2 debian-i386
Configuring for debian-i386
    no-gmp          [default]  OPENSSL_NO_GMP (skip dir)
    no-idea         [option]   OPENSSL_NO_IDEA (skip dir)
    no-jpake        [experimental] OPENSSL_NO_JPAKE (skip dir)
    no-krb5         [krb5-flavor not specified] OPENSSL_NO_KRB5
    no-md2          [default]  OPENSSL_NO_MD2 (skip dir)
    no-mdc2         [option]   OPENSSL_NO_MDC2 (skip dir)
    no-rc5          [option]   OPENSSL_NO_RC5 (skip dir)
    no-rfc3779      [default]  OPENSSL_NO_RFC3779 (skip dir)
    no-shared       [default] 
    no-ssl2         [option]   OPENSSL_NO_SSL2 (skip dir)
    no-store        [experimental] OPENSSL_NO_STORE (skip dir)
    no-zlib-dynamic [default] 

Note that the availability of SSLv23_method does not mean that a client will be able to connect to a server with SSLv2. The OpenSSL documentation briefly discusses this situation:

The list of protocols available can later be limited using the SSL_OP_NO_SSLv2, SSL_OP_NO_SSLv3, SSL_OP_NO_TLSv1 options of the SSL_CTX_set_options() or SSL_set_options() functions. Using these options it is possible to choose e.g. SSLv23_server_method() and be able to negotiate with all possible clients, but to only allow newer protocols like SSLv3 or TLSv1.

Saturday, June 19, 2021
answered 5 Months ago

It seems you have to include <filesystem> like this:

#include <experimental/filesystem>

Don't forget to add -lstdc++fs as a GCC flag!

Here is the proof: Coliru

If that doesn't work, then that probably means that you don't have filesystem in your configuration.

Also, as @MartinR. pointed out, the experimental is no longer needed in GCC 8+.

Monday, August 2, 2021
Jeffrey Stilwell
answered 3 Months ago

Neither <iostream> nor <iostream.h> are standard C header files. Your code is meant to be C++, where <iostream> is a valid header. Use g++ (and a .cpp file extension) for C++ code.

Alternatively, this program uses mostly constructs that are available in C anyway. It's easy enough to convert the entire program to compile using a C compiler. Simply remove #include <iostream> and using namespace std;, and replace cout << endl; with putchar('n');... I advise compiling using C99 (eg. gcc -std=c99)

Tuesday, August 10, 2021
Shai Rado
answered 3 Months ago
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