gcc version information

compiler versions arb needs to support

Ubuntu version	default or updated system compiler	tested on BuildServer? (out-of-order)	Comments	tested frequently
10.04 LTS	gcc 4.4.3
12.04 LTS	gcc 4.6.3
14.04 LTS	gcc 4.8.2		runs with ASAN
	gcc 4.8.4
16.04 LTS	gcc 5.3.1
	gcc 5.4.0
CentOS version
5	gcc 4.4.7
6	gcc 4.4.7
Debian version
7	gcc 4.7.2
8	gcc 4.9.2
OSX version
???	clang 4.2.1

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

see source:trunk/Makefile#L106​

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)