compiler.h: add __weak macro

Instead of writing out '__attribute__((weak))' use a shorter form.

Change-Id: If418a1d55052780077febd2d8f2089021f414b91
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/25767
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Justin TerAvest <teravest@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/arch/x86/acpi_s3.c b/src/arch/x86/acpi_s3.c
index bb8c3c5a8ae1..f6ed1089cf28 100644
--- a/src/arch/x86/acpi_s3.c
+++ b/src/arch/x86/acpi_s3.c
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <arch/acpi.h>
 #include <cbmem.h>
+#include <compiler.h>
 #include <cpu/cpu.h>
 #include <fallback.h>
 #include <timestamp.h>
@@ -218,7 +219,7 @@ static void acpi_jump_to_wakeup(void *vector)
 	acpi_do_wakeup((uintptr_t)vector, source, target, size);
 }
 
-void __attribute__((weak)) mainboard_suspend_resume(void)
+void __weak mainboard_suspend_resume(void)
 {
 }