[Freemint-list] m68k-atari-mint-gcc 7.1 status

[Thorsten Otto]

Hi,

just in case someone makes experiments with -flto: i just stumbled upon a 
pitfall when trying to compile packages using autoconf scripts. You have to 
make sure that -flto is only added to CFLAGS/CXXFLAGS until after all checks 
for library functions have done (or pass it somehow in the invocation of 
make). Otherwise, in the test program that is compiled by autoconf, the 
reference to the tested function is optimized away because it is not used 
afterwards, and the test succeeds. That will make think autoconf the function 
exists, define the HAVE_XXX macro, and the compilation will fail if the 
function is missing.