From: Olivier Gayot Date: Tue, 18 Oct 2022 16:48:14 +0100 Subject: fix expressions not considered constant on ppc64el with GCC On ppc64el, GCC seems to be unable to determine the result of some long double expressions at compile time. This makes libcamera fail to build from source on ppc64el. Make sure we only use constexpr on expressions that are considered constant on all architectures. Bug-Ubuntu: https://launchpad.net/bugs/1992331 Bug-Debian: https://bugs.debian.org/1021544 Forwarded: https://lists.libcamera.org/pipermail/libcamera-devel/2022-October/034764.html Last-Update: 2022-10-18 --- src/ipa/raspberrypi/raspberrypi.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/src/ipa/rpi/common/ipa_base.cpp +++ b/src/ipa/rpi/common/ipa_base.cpp @@ -42,7 +42,7 @@ /* Configure the sensor with these values initially. */ constexpr double defaultAnalogueGain = 1.0; constexpr Duration defaultExposureTime = 20.0ms; -constexpr Duration defaultMinFrameDuration = 1.0s / 30.0; +constexpr Duration defaultMinFrameDuration = 1s / 30.0; constexpr Duration defaultMaxFrameDuration = 250.0s; /* @@ -51,7 +51,7 @@ * we rate-limit the controller Prepare() and Process() calls to lower than or * equal to this rate. */ -constexpr Duration controllerMinFrameDuration = 1.0s / 30.0; +constexpr Duration controllerMinFrameDuration = 1s / 30.0; /* List of controls handled by the Raspberry Pi IPA */ const ControlInfoMap::Map ipaControls{