4 ms·
Are you sure they're up to -O6 ? Doing this in any autoconf-based program: $ ./configure CC="/usr/bin/clang-8" CFLAGS="-Weverything -O6 -flto=full" LDFLAG
by aaronmdjones 8y ago
Are you sure they're up to -O6 ?
Doing this in any autoconf-based program:
$ ./configure CC="/usr/bin/clang-8" CFLAGS="-Weverything -O6 -flto=full" LDFLAGS="-fuse-ld=/usr/bin/ld.lld-8"
... fails (error: C compiler cannot create executables); same for -O5.
-O4 works, but generates this diagnostic:
clang: warning: -O4 is equivalent to -O3 [-Wdeprecated]