Find GCC Major Version

gccv.rb

#Builds scripts often use the GCC major and minor version
#to make tweaks and adjustments to compilation parameters
#by setting GCC_VERSION=41 for example. However, gcc doesn't
#provide an out of the box way to get at this value.
 
#this works until we get to GCC version 10 ;)
if /(\d)\.(\d)\.(\d)/ =~ `gcc --version`
  puts "#{$1}#{$2}" #=> 44
else
  puts "unabled to find gcc version in #{`gcc --version`}"
end