DOC: install: update gcc version requirements

It turns out that gcc-3.4 doesn't build anymore (and it has probably been
the case since 2.4 or so). gcc-4.2 does build fine though, let's mark it
as the oldest supported one. Now that gcc-12 works, also update the most
recently known-to-work version.

diff --git a/INSTALL b/INSTALL
index 696cc0ffa5496346aac925e3a3f3c15303fcb2b5..55033cbfc45ea31f4240557612b1b0bfe004fc55 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -101,7 +101,7 @@ HAProxy requires a working GCC or Clang toolchain and GNU make :
     may want to retry with "gmake" which is the name commonly used for GNU make
     on BSD systems.
 
-  - GCC >= 3.4 (up to 11 tested). Older versions can be made to work with a
+  - GCC >= 4.2 (up to 12 tested). Older versions can be made to work with a
     few minor adaptations if really needed. Newer versions may sometimes break
     due to compiler regressions or behaviour changes. The version shipped with
     your operating system is very likely to work with no trouble. Clang >= 3.0