The reason for this error should be a problem with the gcc version.
View version command:
If nothing else, it should be the version of
gcc4.9, c++ regular expressions are supported, so we need to upgrade gcc.
First find a source package of gcc4.9 to install (find one yourself)
mkdir build …/./configure make & make install
Executing configure may report an error:
linux : error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
Note that these three libraries need to be installed:
wget ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-6.1.0.tar.bz2 wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-3.1.4.tar.bz2 wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-1.0.3.tar.gz
./configure make & make install
Executing configure of gmp may report an error:
error: No usable m4 in $PATH or /usr/5bin (see config.log for reasons)
Indicates that the m4 library is missing
./configure may report an error:
./stdio.h:477:1: error: 'gets' undeclared here (not in a function) _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
m4/lib to find a
stdio.in.h problem, if you can't find it, you can try to use
find -name stdio.in.h
comment out the first line
_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
#if defined(__GLIBC__) && !defined(__UCLIBC__) && !__GLIBC_PREREQ(2, 16) _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead"); #endif
Then compile these libraries all the way
When it comes time to compile gcc
configure reported an error again
I suspect your system does not have 32-bit developement libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler , rerun configure with --disable-multilib.
sudo yum install glibc-devel.i686 sudo yum install libgcc.i686
Oh it's finally over
make && make install to go
Oh, forgot to mention, if your machine is multi-core, you can perform parallel compilation
make -j8 The number behind represents the number of cores
During this time, you can watch a movie, but after watching
make without any accident, it has not finished executing. . . . .
I feel that it is not the language itself that persuades newbee, but the environment configuration under linux.