This makes build use compiler to decide from where to get atomics instead of assuming that it should always come from libatomic, helps sharing build artifacts with OSes which may not have libatomic installed because it is not required on those hosts.
Signed-off-by: Khem Raj <raj.k...@gmail.com> --- ...k-with-latomic-only-if-no-atomic-bui.patch | 46 +++++++++++++++++++ meta/recipes-support/libusb/libusb1_1.0.26.bb | 1 + 2 files changed, 47 insertions(+) create mode 100644 meta/recipes-support/libusb/libusb1/0001-configure.ac-Link-with-latomic-only-if-no-atomic-bui.patch diff --git a/meta/recipes-support/libusb/libusb1/0001-configure.ac-Link-with-latomic-only-if-no-atomic-bui.patch b/meta/recipes-support/libusb/libusb1/0001-configure.ac-Link-with-latomic-only-if-no-atomic-bui.patch new file mode 100644 index 0000000000..3c223e0822 --- /dev/null +++ b/meta/recipes-support/libusb/libusb1/0001-configure.ac-Link-with-latomic-only-if-no-atomic-bui.patch @@ -0,0 +1,46 @@ +From 95e601ce116dd46ea7915c171976b85ea0905d58 Mon Sep 17 00:00:00 2001 +From: Lonnie Abelbeck <lon...@abelbeck.com> +Date: Sun, 8 May 2022 14:05:56 -0500 +Subject: [PATCH] configure.ac: Link with -latomic only if no atomic builtins + +Follow-up to 561dbda, a check of GCC atomic builtins needs to be done +first. + +I'm no autoconf guru, but using this: +https://github.com/mesa3d/mesa/blob/0df485c285b73c34ba9062f0c27e55c3c702930d/configure.ac#L469 +as inspiration, I created a pre-check before calling AC_SEARCH_LIBS(...) + +Fixes #1135 +Closes #1139 +Upstream-Status: Backport [https://github.com/kraj/libusb/commit/95e601ce116dd46ea7915c171976b85ea0905d58] +Signed-off-by: Khem Raj <raj.k...@gmail.com> +--- + configure.ac | 16 +++++++++++++++- + libusb/version_nano.h | 2 +- + 2 files changed, 16 insertions(+), 2 deletions(-) + +--- a/configure.ac ++++ b/configure.ac +@@ -153,7 +153,21 @@ if test "x$platform" = xposix; then + AC_SEARCH_LIBS([pthread_create], [pthread], + [test "x$ac_cv_search_pthread_create" != "xnone required" && AC_SUBST(THREAD_LIBS, [-lpthread])], + [], []) +- AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic]) ++ dnl Check for new-style atomic builtins. We first check without linking to -latomic. ++ AC_MSG_CHECKING(whether __atomic_load_n is supported) ++ AC_LINK_IFELSE([AC_LANG_SOURCE([[ ++ #include <stdint.h> ++ int main() { ++ struct { ++ uint64_t *v; ++ } x; ++ return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) & ++ (int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL); ++ }]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes, GCC_ATOMIC_BUILTINS_SUPPORTED=no) ++ AC_MSG_RESULT($GCC_ATOMIC_BUILTINS_SUPPORTED) ++ if test "x$GCC_ATOMIC_BUILTINS_SUPPORTED" != xyes; then ++ AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic]) ++ fi + elif test "x$platform" = xwindows; then + AC_DEFINE([PLATFORM_WINDOWS], [1], [Define to 1 if compiling for a Windows platform.]) + else diff --git a/meta/recipes-support/libusb/libusb1_1.0.26.bb b/meta/recipes-support/libusb/libusb1_1.0.26.bb index 7371faf017..301e60c14f 100644 --- a/meta/recipes-support/libusb/libusb1_1.0.26.bb +++ b/meta/recipes-support/libusb/libusb1_1.0.26.bb @@ -11,6 +11,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=fbc093901857fcd118f065f900982c24" BBCLASSEXTEND = "native nativesdk" SRC_URI = "${GITHUB_BASE_URI}/download/v${PV}/libusb-${PV}.tar.bz2 \ + file://0001-configure.ac-Link-with-latomic-only-if-no-atomic-bui.patch \ file://run-ptest \ " -- 2.39.1
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