gcc version information

compiler/perl versions arb needs to support

Ubuntu version	(default or updated) System compiler	Perl version	Test frequency	Comment
10.04 LTS	gcc 4.4.3	?		(mgg)
12.04 LTS	gcc 4.6.3	5.14.2		(precise vm)
14.04 LTS	gcc 4.8.4	5.18.2		(trusty vm)
16.04 LTS	gcc 5.4.0	5.22.1		(xenial vm)
18.04 LTS	gcc 7.4.0	5.26.1		(bionic vm)
mint-19	gcc 7.5.0	5.26.1		development
20.04 LTS	gcc 9.3.0	5.3.0		(fossa vm)
Debian version
7	gcc 4.7.2	?
8	gcc 4.9.2	5.20.2		(jessie vm)
10	gcc 8.3.0	5.28.1		(buster vm)
CentOS version
5	gcc 4.4.7	?
6	gcc 4.4.7	?
OSX version
	clang 4.2.1	?

( frequently provided builds untested)

Please report when any of these version fails to build.

compiler versions known by the production version of arb (=trunk)

see source:trunk/Makefile#L173​

Note: not all of these versions may be used to compile arb, see next section.

compiler versions not compatible with arb

version	forbidden?	reason
gcc <4.4.3	yes	lowest supported gcc version is 4.4.3 = ubuntu 10.04 system compiler
gcc 4.6.4	yes	fails to compile inplace constructors
gcc 4.8.0	yes	causes undefined behavior on certain uses of bool (see #617)

arb/perl mismatch

When you encounter the error message

Incompatibility detected between installed arb build and perl version:
* arb macro playback will not work and
* other arb perl scripts wont work either.

Solution:

• install another arb build which is compatible with your perl version
  
  • see perl version info in above to guess which version could work
  • call perl -v to detect your perl version
• (otherwise see ​comment here)