[igt-dev] [PATCH i-g-t 1/5] meson/cc: Disable memory-allocating builtins

[Arkadiusz Hiler]

Disable the memory allocating builtins as they may cause unexpected behavior
with our framework. They *may* get optimized out in favor of a register or
stack variable, making them effectively local.

Local variables do not play well with longjmp, which we use for fixtures
and subtests.

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
---
 meson.build | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/meson.build b/meson.build
index 8196ab63..2d54c28f 100644
--- a/meson.build
+++ b/meson.build
@@ -62,6 +62,12 @@ cc_args = [
 	'-Werror=sequence-point',
 	'-Werror=trigraphs',
 	'-Werror=write-strings',
+# Disable the memory allocating builtins as they may cause unexpected behavior
+# with our framework. They *may* get optimized out in favor of a register or
+# stack variable, making them effectively local. Local variables do not play
+# well with longjmp which is heavily used by IGT framework.
+	'-fno-builtin-malloc',
+	'-fno-builtin-calloc',
 ]
 
 foreach cc_arg : cc_args
-- 
2.20.1