Core update to LLVM6

Hello, today I will tell you how to update your old gcc to a new llvm6.

Programm:

• VirtualBox
• WinSCP
• PuTTY
• Notepad++

Structure

• Install Freebsd
• Freebsd setting
• Install some packages
• Compile libs
• Fix source
• Compile source

Content

Install Freebsd

The first thing we should start with is the installation of freebsd.

• Go to official site freebsd and download this .iso
• Then, we need install this disk image. I used a VirtualBox.
• Now, we create a machine and all steps will be in pictures.
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• Then, start the virtual machine and presses "install".
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• After choose your encoding, I left by the standard.
• Enter the name of the machine, I wrote "llvm6".
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• Choose (UFS), if you are an advanced user, you can choose (ZFS).
• Then "Entire Disk" - > "MBR" ("Finish" and "Commit").
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• After installation, enter the password (my password is "dev" and repeat).
• Select network interface. (IPv4 -> "Yes", DHCP -> "Yes", IPv6 -> "No").
• Skip, by pressing "ENTER".
• Choose your region and time zone. Then we choose "Set Date" twice.
• Press "ENTER" and skip twice. After, we are asked if we want to create another user. We answer "No".
• Manual Configuration -> "No", Complete -> "Reboot".
• Go to the settings and turn off the drive -> "Remove".

Freebsd setting

First step it is open access for root users.

• Write this in command line "ee /etc/ssh/sshd_config".
• Then found line "#PermitRootLogin no" and change to "PermitRootLogin yes".
• Save changes (ESC -> ENTER -> ENTER).
• Restart SSHD (service sshd restart).
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• Then we need to know your local ip. Press ("WIN + R" -> cmd -> ipconfig)
• And last step. For SFTP connection I use WinSCP and PuTTY for ssh.

Install some packages

• pkg update
• pkg upgrade
• pkg install gmake
• pkg install subversion
• pkg install clang-devel

Compile libs

• Upload source. I choose VINCHENZOO files and upload to /root/ (although this is not important).

• First lib (libgame), go to /src/Makefile and edit:

 CXX = g++

replace it with

 CXX = clang++-devel

and

 ifeq ($(GCC_VERSION), 4)
 CFLAGS  = -Wall -O2 -pipe -mtune=i686 -fno-exceptions -fno-rtti
 else
 CFLAGS  = -Wall -O2 -pipe -mcpu=i686 -fno-exceptions -fno-rtti
 endif

replace it with

 CFLAGS = -Wall -Ofast -D_THREAD_SAFE -pipe -msse2 -mssse3 -m32 -fno-exceptions -std=c++17 -stdlib=libc++ -I../include

After write:

 gmake clean
 gmake dep
 gmake -j20

and we have this error:

 ./../../common/stl.h:12:10: fatal error: 'ext/functional' file not found
 #include <ext/functional>
          ^~~~~~~~~~~~~~~~
 1 error generated.

to fix it, go to /common/stl.h and delete 3 line.

 #ifdef __GNUC__
 #include <ext/functional>
 #endif

Then compile again (gmake -j20). If successful, then in the folder lib there will be libgame.a

• Second lib (liblua), go to /config and edit:

 CC= clang-devel

After write:

 gmake clean
 gmake -j20

If successful, then in the folder lib there will be liblua.a & liblualib.a

• Third lib (libpoly), go to /Makefile and edit:

 CXX = g++

replace it with

 CXX = clang++-devel

and

 ifeq ($(GCC_VERSION), 4)
 CFLAGS  = -Wall -O2 -pipe -mtune=i686 -fno-exceptions -fno-rtti
 else
 CFLAGS  = -Wall -O2 -pipe -mcpu=i686 -fno-exceptions -fno-rtti
 endif

replace it with

 CFLAGS = -Wall -Ofast -D_THREAD_SAFE -pipe -msse2 -mssse3 -m32 -fno-exceptions -std=c++17 -stdlib=libc++

After write:

 gmake clean
 gmake dep
 gmake -j20

If successful, then there will be libpoly.a

• Fourth lib (libserverkey), go to /Makefile and edit:

 CXX = g++

replace it with

 CXX = clang++-devel

and

 ifeq ($(GCC_VERSION), 4)
 CFLAGS  = -Wall -O2 -pipe -mtune=i686 -fno-exceptions -fno-rtti
 else
 CFLAGS  = -Wall -O2 -pipe -mcpu=i686 -fno-exceptions -fno-rtti
 endif

replace it with

 CFLAGS = -Wall -Ofast -D_THREAD_SAFE -pipe -msse2 -mssse3 -m32 -fno-exceptions -std=c++17 -stdlib=libc++

After write:

 gmake clean
 gmake dep
 gmake -j20

If successful, then there will be libserverkey.a

• Fifth lib (libsql), go to /Makefile and edit:

 CXX = g++

replace it with

 CXX = clang++-devel

and

 CFLAGS  = $(IFLAGS) -Wall -O2 -pipe -mtune=i686 -D_THREAD_SAFE -fno-exceptions 

replace it with

 CFLAGS = $(IFLAGS) -Wall -Ofast -D_THREAD_SAFE -pipe -msse2 -mssse3 -m32 -fno-exceptions -std=c++17 -stdlib=libc++

After write:

 gmake clean
 gmake dep
 gmake -j20

If successful, then there will be libsql.a

• Sixth lib (libthecore):

In this lib very much needs to be corrected. So I suggest just delete old files and upload my (./some files/libthecore).

 gmake clean
 gmake dep
 gmake -j20

If successful, then there will be libthecore.a

• With game we finished. Now let's look at the folder Extern.

• First we download boost from official site choose the latest version (now it is 1.65.1) and click to boost_1_65_1.tar.gz

• Delete (rm -rf boost) folder "boost".

• Upload to server and unpack (tar -xf boost_1_65_1.tar.gz).

• Go to ./boost_1_65_1 and move(mv boost ../) folder to ../

• Then delete folder(rm -rf boost_1_65_1) "boost_1_65_1" and archive(rm -rf boost_1_65_1.tar.gz) "boost_1_65_1.tar.gz". Boost lib no need to compile, so we finished with it.

• Second step cryptopp lib choose Source code (tar.gz)

• Delete (rm -rf cryptopp) folder "cryptopp".

• Upload to server and unpack (tar -xf cryptopp-CRYPTOPP_5_6_5.tar.gz).

• In ./cryptopp-CRYPTOPP_5_6_5/GNUmakefile we found:

 .PHONY: all

and add above

 СС = clang-devel
 CXX	= clang++-devel -std=c++17

ok, now need disable sha asm & disable vmac asm. Open sha.cpp looking for a line:

 #if defined(CRYPTOPP_DISABLE_SHA_ASM)

and add above

 #define CRYPTOPP_DISABLE_SHA_ASM

Open vmac.cpp looking for a line:

 #if defined(CRYPTOPP_DISABLE_VMAC_ASM)

and add above

 #define CRYPTOPP_DISABLE_VMAC_ASM

Open sha.h looking for a line:

 #if defined(CRYPTOPP_LLVM_CLANG_VERSION) && (CRYPTOPP_LLVM_CLANG_VERSION < 30400)
 # define CRYPTOPP_DISABLE_SHA_ASM
 #endif

and replace it with

 #define CRYPTOPP_DISABLE_SHA_ASM

 gmake clean
 gmake -j20

After compile move(mv libcryptopp.a ../../lib) to lib folder and rename cryptopp-CRYPTOPP_5_6_5 to cryptopp