From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 17:35:18 +0200
Subject: Adding upstream version 252.22.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/core/bpf/meson.build | 111 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 src/core/bpf/meson.build

(limited to 'src/core/bpf/meson.build')

diff --git a/src/core/bpf/meson.build b/src/core/bpf/meson.build
new file mode 100644
index 0000000..f654016
--- /dev/null
+++ b/src/core/bpf/meson.build
@@ -0,0 +1,111 @@
+# SPDX-License-Identifier: LGPL-2.1+
+
+if conf.get('BPF_FRAMEWORK') != 1
+        subdir_done()
+endif
+
+bpf_clang_flags = [
+        '-std=gnu11',
+        '-Wno-compare-distinct-pointer-types',
+        '-O2',
+        '-target',
+        'bpf',
+        '-g',
+        '-c',
+]
+
+bpf_gcc_flags = [
+        '-std=gnu11',
+        '-O2',
+        '-mkernel=5.2',
+        '-mcpu=v3',
+        '-mco-re',
+        '-gbtf',
+        '-c',
+]
+
+# Generate defines that are appropriate to tell the compiler what architecture
+# we're compiling for. By default we just map meson's cpu_family to __<cpu_family>__.
+# This dictionary contains the exceptions where this doesn't work.
+#
+# C.f. https://mesonbuild.com/Reference-tables.html#cpu-families
+# and src/basic/missing_syscall_def.h.
+cpu_arch_defines = {
+        'ppc'     : ['-D__powerpc__'],
+        'ppc64'   : ['-D__powerpc64__', '-D_CALL_ELF=2'],
+        'riscv32' : ['-D__riscv', '-D__riscv_xlen=32'],
+        'riscv64' : ['-D__riscv', '-D__riscv_xlen=64'],
+        'x86'     : ['-D__i386__'],
+
+        # For arm, assume hardware fp is available.
+        'arm'     : ['-D__arm__', '-D__ARM_PCS_VFP'],
+}
+
+bpf_arch_flags = cpu_arch_defines.get(host_machine.cpu_family(),
+                                      ['-D__@0@__'.format(host_machine.cpu_family())])
+if bpf_compiler == 'gcc'
+        bpf_arch_flags += ['-m' + host_machine.endian() + '-endian']
+endif
+
+libbpf_include_dir = libbpf.get_variable(pkgconfig : 'includedir')
+
+bpf_o_unstripped_cmd = []
+if bpf_compiler == 'clang'
+        bpf_o_unstripped_cmd += [
+                clang,
+                bpf_clang_flags,
+                bpf_arch_flags,
+        ]
+elif bpf_compiler == 'gcc'
+        bpf_o_unstripped_cmd += [
+                bpf_gcc,
+                bpf_gcc_flags,
+                bpf_arch_flags,
+        ]
+endif
+
+bpf_o_unstripped_cmd += ['-I.']
+
+if not meson.is_cross_build() and bpf_compiler == 'clang'
+        target_triplet_cmd = run_command('gcc', '-dumpmachine', check: false)
+        if target_triplet_cmd.returncode() == 0
+                target_triplet = target_triplet_cmd.stdout().strip()
+                bpf_o_unstripped_cmd += [
+                        '-isystem',
+                        '/usr/include/@0@'.format(target_triplet)
+                ]
+        endif
+endif
+
+bpf_o_unstripped_cmd += [
+        '-idirafter',
+        libbpf_include_dir,
+        '@INPUT@',
+        '-o',
+        '@OUTPUT@'
+]
+
+if bpftool_strip
+        bpf_o_cmd = [
+                bpftool,
+                'gen',
+                'object',
+                '@OUTPUT@',
+                '@INPUT@'
+        ]
+elif bpf_compiler == 'clang'
+        bpf_o_cmd = [
+                llvm_strip,
+                '-g',
+                '@INPUT@',
+                '-o',
+                '@OUTPUT@'
+        ]
+endif
+
+skel_h_cmd = [
+        bpftool,
+        'gen',
+        'skeleton',
+        '@INPUT@'
+]
-- 
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