From 508c3e0c50c836f03b26cf08b96310e783830744 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Tue, 2 Feb 2016 16:31:21 +0100 Subject: [PATCH] docs/manual: document usage of BR2_TOOLCHAIN_HAS_SYNC_x This commit updates the documentation to detail when and how to use the BR2_TOOLCHAIN_HAS_SYNC_x dependency. Note that we chose to not add a comment about this dependency, because it is mainly tied to architecture capabilities (except in very specific cases, which would be way too complicated to explain in a Config.in comment). Signed-off-by: Thomas Petazzoni --- docs/manual/adding-packages-directory.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/docs/manual/adding-packages-directory.txt b/docs/manual/adding-packages-directory.txt index b9596a28ca..aa9f4e81f4 100644 --- a/docs/manual/adding-packages-directory.txt +++ b/docs/manual/adding-packages-directory.txt @@ -279,6 +279,20 @@ use in the comment. ** Dependency symbol: +BR2_ARCH_HAS_ATOMICS+ ** Comment string: no comment to be added +* Gcc +__sync_*+ built-ins used for atomic operations. They are + available in variants operating on 1 byte, 2 bytes, 4 bytes and 8 + bytes. Since different architectures support atomic operations on + different sizes, one dependency symbol is available for each size: +** Dependency symbol: +BR2_TOOLCHAIN_HAS_SYNC_1+ for 1 byte, + +BR2_TOOLCHAIN_HAS_SYNC_2+ for 2 bytes, + +BR2_TOOLCHAIN_HAS_SYNC_4+ for 4 bytes, +BR2_TOOLCHAIN_HAS_SYNC_8+ + for 8 bytes. +** Comment string: no comment to be added + +* Gcc +__atomic_*+ built-ins used for atomic operations. +** Dependency symbol: +BR2_TOOLCHAIN_HAS_ATOMIC+. +** Comment string: no comment to be added + * Kernel headers ** Dependency symbol: +BR2_TOOLCHAIN_HEADERS_AT_LEAST_X_Y+, (replace +X_Y+ with the proper version, see +toolchain/toolchain-common.in+) -- 2.30.2