On 17/11/17 12:50, Florian Weimer wrote:
On 11/17/2017 01:11 PM, Szabolcs Nagy wrote:
+/* There are two variant implementations of type-generic macros in
+ this file: one for GCC 8 and later, using __builtin_tgmath and
+ where each macro expands each of its arguments only once, and one
+ for older GCC, using other compiler extensions but with macros
+ expanding their arguments many times (so resulting in exponential
+ blowup of the size of expansions when calls to such macros are
+ nested inside arguments to such macros). */
+
+#define __HAVE_BUILTIN_TGMATH __GNUC_PREREQ (8, 0)
this breaks the build on trunk toolchains that
lack __builtin_tgmath
Short of getting GCC to adopt something similar to the Clang __has_builtin pseudo-macro, I don't see any
solution other that requiring those who are affected by such issues to update.
Considering that this only affects an unreleased toolchain, I don't think the upgrade requirement is
unreasonably onerous.
in this case prereq(8,1) would work