cross compiling with meson is easier than the plain makefile build method that libucontext has, there were bunch of problems passing compiler and make variables, compounded by the fact that makefile decided on some compiler flags internally and thought that cflags are synthesized completely in makefile and not passed from environment like OE is doing. As a result some features were not being compiled in e.g. function name aliases were missing
meson, on the other hand is cleaner and we have to add a patch to support cpu architecture on meson cmdline, everything else pretty much works out of box Signed-off-by: Khem Raj <[email protected]> --- .../0001-meson-Add-option-to-pass-cpu.patch | 49 +++++++++++++++++++ meta/recipes-core/musl/libucontext_git.bb | 18 ++----- 2 files changed, 53 insertions(+), 14 deletions(-) create mode 100644 meta/recipes-core/musl/libucontext/0001-meson-Add-option-to-pass-cpu.patch diff --git a/meta/recipes-core/musl/libucontext/0001-meson-Add-option-to-pass-cpu.patch b/meta/recipes-core/musl/libucontext/0001-meson-Add-option-to-pass-cpu.patch new file mode 100644 index 0000000000..1fdc9f739d --- /dev/null +++ b/meta/recipes-core/musl/libucontext/0001-meson-Add-option-to-pass-cpu.patch @@ -0,0 +1,49 @@ +From a530eed9e7e6872e10fe92efaf1e9739471c30ca Mon Sep 17 00:00:00 2001 +From: Khem Raj <[email protected]> +Date: Sun, 30 May 2021 08:30:28 -0700 +Subject: [PATCH] meson: Add option to pass cpu + +This helps with cross compile setups, where host_cpu != target_cpu +therefore detecting it on the fly will end up with wrong cpu to build +for + +Upstream-Status: Submitted [https://github.com/kaniini/libucontext/pull/28] +Signed-off-by: Khem Raj <[email protected]> +--- + meson.build | 6 +++++- + meson_options.txt | 4 +++- + 2 files changed, 8 insertions(+), 2 deletions(-) + +diff --git a/meson.build b/meson.build +index e863780..2b4bdbd 100644 +--- a/meson.build ++++ b/meson.build +@@ -6,7 +6,11 @@ project( + version : run_command('head', files('VERSION')).stdout() + ) + +-cpu = host_machine.cpu_family() ++cpu = get_option('cpu') ++if cpu == '' ++ cpu = host_machine.cpu_family() ++endif ++ + if cpu == 'sh4' + cpu = 'sh' + endif +diff --git a/meson_options.txt b/meson_options.txt +index d4201d1..864d83c 100644 +--- a/meson_options.txt ++++ b/meson_options.txt +@@ -1,4 +1,6 @@ + option('freestanding', type : 'boolean', value : false, + description: 'Do not use system headers') + option('export_unprefixed', type : 'boolean', value : true, +- description: 'Export POSIX 2004 ucontext names as alises') +\ No newline at end of file ++ description: 'Export POSIX 2004 ucontext names as alises') ++option('cpu', type : 'string', value : '', ++ description: 'Target CPU architecture for cross compile') +-- +2.31.1 + diff --git a/meta/recipes-core/musl/libucontext_git.bb b/meta/recipes-core/musl/libucontext_git.bb index 0b64867ce0..d8ae8242c5 100644 --- a/meta/recipes-core/musl/libucontext_git.bb +++ b/meta/recipes-core/musl/libucontext_git.bb @@ -11,7 +11,8 @@ DEPENDS = "" PV = "1.1+${SRCPV}" SRCREV = "335ee864ef6f4a5d4b525453fd9dbfb3507cfecc" SRC_URI = "git://github.com/kaniini/libucontext \ -" + file://0001-meson-Add-option-to-pass-cpu.patch \ + " S = "${WORKDIR}/git" @@ -49,16 +50,5 @@ def map_kernel_arch(a, d): return a bb.error("cannot map '%s' to a linux kernel architecture" % a) -export ARCH = "${@map_kernel_arch(d.getVar('TARGET_ARCH'), d)}" - -CFLAGS += "-Iarch/${ARCH} -Iarch/common" - -EXTRA_OEMAKE = "CFLAGS='${CFLAGS}' LDFLAGS='${LDFLAGS}' LIBDIR='${base_libdir}'" - -do_compile() { - oe_runmake ARCH=${ARCH} -} - -do_install() { - oe_runmake ARCH="${ARCH}" DESTDIR="${D}" install -} +EXTRA_OEMESON = "-Dcpu=${@map_kernel_arch(d.getVar('TARGET_ARCH'), d)}" +inherit meson -- 2.31.1
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