WARNING: Youwillneedre2c0.13.4orlaterifyouwanttoregeneratePHPparsers

WARNING: Youwillneedre2c0.13.4orlaterifyouwanttoregeneratePHPparsers host environment: CentOS6.5

PHP5.6.1

When compiling and installing PHP, an alert message is displayed: "configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers ."

Here it prompts an alarm instead of an error, but to verify whether it is fatal, you must understand the role of re2c

Re2c introduction: http://re2c.org/

Download re2c: http://sourceforge.net/projects/re2c/files/re2c/

It has been confirmed that re2c can improve performance, so let's start upgrading.

Download the latest re2c version, http://sourceforge.net/projects/re2c/files/re2c/0.13.7.5/re2c-0.13.7.5.tar.gz/download

# Tar xf re2c-0.13.7.5.tar.gz

# Cd re2c-0.13.7.5

#./Configure

# Make & make install

Re-compile and install, and the alarm information disappears