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/drivers/spi/spi-generic.c b/src/drivers/spi/spi-generic.c
index 6d7fcdc021..f1b11aedf7 100644
--- a/src/drivers/spi/spi-generic.c
+++ b/src/drivers/spi/spi-generic.c
@@ -15,6 +15,7 @@
  */
 
 #include <assert.h>
+#include <compiler.h>
 #include <spi-generic.h>
 #include <string.h>
 
@@ -116,7 +117,7 @@ unsigned int spi_crop_chunk(const struct spi_slave *slave, unsigned int cmd_len,
 	return min(ctrlr_max, buf_len);
 }
 
-void __attribute__((weak)) spi_init(void)
+void __weak spi_init(void)
 {
 	/* Default weak implementation - do nothing. */
 }