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