[Buildroot] [git commit] package/erlang: support build when gcc __atomic_* exist

[Thomas Petazzoni]

commit: https://git.buildroot.net/buildroot/commit/?id=0bab8c1089983a4b5f0f2acfe5cad77b02d6f654
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

While Erlang will use it's own atomic operations, it can also use gcc
__atomic_* builtins. This is now listed in Erlang's HOWTO/INSTALL.md.

This change was necessary on RISC-V, since Erlang didn't have a built-in
implementation, but it was able to use gcc's __atomic_* functions.

Signed-off-by: Frank Hunleth <fhunleth at troodon-software.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
 package/erlang/Config.in | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/package/erlang/Config.in b/package/erlang/Config.in
index ab87eab6ff..b6b100f38b 100644
--- a/package/erlang/Config.in
+++ b/package/erlang/Config.in
@@ -6,9 +6,11 @@ config BR2_PACKAGE_HOST_ERLANG_ARCH_SUPPORTS
 config BR2_PACKAGE_ERLANG_ARCH_SUPPORTS
 	bool
 	# see HOWTO/INSTALL.md for Erlang's supported platforms
-	# when using its native atomic ops implementation
+	# when using its native atomic ops implementation or gcc's
+	# __atomic_* builtins
 	default y if BR2_i386 || BR2_x86_64 || BR2_powerpc || \
-		BR2_sparc_v9 || BR2_arm || BR2_aarch64 || BR2_mipsel
+		BR2_sparc_v9 || BR2_arm || BR2_aarch64 || BR2_mipsel || \
+		BR2_TOOLCHAIN_HAS_ATOMIC
 	# erlang needs host-erlang
 	depends on BR2_PACKAGE_HOST_ERLANG_ARCH_SUPPORTS