| From 2d88c5ab57c710a2471a9432a7c390c90959c503 Mon Sep 17 00:00:00 2001 |
| From: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| Date: Thu, 20 Aug 2020 20:44:28 +0200 |
| Subject: [PATCH] CMakeLists.txt: fix gpio detection |
| |
| Commit 05262e6dc8424c21f0caf033b0473553825dac09 assumed that if |
| linux/gpio.h is available then variables such as |
| GPIOEVENT_EVENT_RISING_EDGE are also available |
| |
| This assumption is wrong, gpio.h is available since kernel 4.6 and |
| https://github.com/torvalds/linux/commit/3c702e9987e261042a07e43460a8148be254412e |
| but GPIOEVENT_REQUEST_RISING_EDGE is available only since kernel 4.8 and |
| https://github.com/torvalds/linux/commit/61f922db72216b00386581c851db9c9095961522 |
| |
| Fixes: |
| - http://autobuild.buildroot.org/results/c3b868c12baac9438b792ada105c0b0de0106311 |
| |
| Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| [Upstream status: https://github.com/vsergeev/c-periphery/pull/30] |
| --- |
| CMakeLists.txt | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| diff --git a/CMakeLists.txt b/CMakeLists.txt |
| index 9345e35..d013b32 100644 |
| --- a/CMakeLists.txt |
| +++ b/CMakeLists.txt |
| @@ -4,8 +4,8 @@ project(periphery C) |
| option(BUILD_TESTS "Build test programs" ON) |
| |
| # Check for Linux kernel header files for character device GPIO support |
| -include(CheckIncludeFiles) |
| -CHECK_INCLUDE_FILES(linux/gpio.h HAVE_CDEV_GPIO_HEADERS) |
| +include(CheckSymbolExists) |
| +CHECK_SYMBOL_EXISTS(GPIOEVENT_EVENT_RISING_EDGE linux/gpio.h HAVE_CDEV_GPIO_HEADERS) |
| if(NOT HAVE_CDEV_GPIO_HEADERS) |
| message(WARNING "Linux kernel header files not found for character device GPIO support. c-periphery will be built with legacy sysfs GPIO support only.") |
| endif() |
| -- |
| 2.27.0 |
| |
