!90 [backport]backport-libbpf-Disable-SEC-pragma-macro-on-GCC.patch

From: @zhang-mingyi66 
Reviewed-by: @nlgwcy 
Signed-off-by: @nlgwcy

backport-libbpf-Disable-SEC-pragma-macro-on-GCC.patch

@@ -0,0 +1,61 @@
+From b31ca3fa0e62fde6aa66f855136e29e088ad9dde Mon Sep 17 00:00:00 2001
+From: James Hilliard <james.hilliard1@gmail.com>
+Date: Wed, 6 Jul 2022 05:18:38 -0600
+Subject: [PATCH] libbpf: Disable SEC pragma macro on GCC
+
+It seems the gcc preprocessor breaks with pragmas when surrounding
+__attribute__.
+
+Disable these pragmas on GCC due to upstream bugs see:
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55578
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90400
+
+Fixes errors like:
+error: expected identifier or '(' before '#pragma'
+  106 | SEC("cgroup/bind6")
+      | ^~~
+
+error: expected '=', ',', ';', 'asm' or '__attribute__' before '#pragma'
+  114 | char _license[] SEC("license") = "GPL";
+      | ^~~
+
+Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
+Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
+Link: https://lore.kernel.org/bpf/20220706111839.1247911-1-james.hilliard1@gmail.com
+---
+ src/bpf_helpers.h | 13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+diff --git a/src/bpf_helpers.h b/src/bpf_helpers.h
+index fb04eaf..7349b16 100644
+--- a/src/bpf_helpers.h
++++ b/src/bpf_helpers.h
+@@ -22,12 +22,25 @@
+  * To allow use of SEC() with externs (e.g., for extern .maps declarations),
+  * make sure __attribute__((unused)) doesn't trigger compilation warning.
+  */
++#if __GNUC__ && !__clang__
++
++/*
++ * Pragma macros are broken on GCC
++ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55578
++ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90400
++ */
++#define SEC(name) __attribute__((section(name), used))
++
++#else
++
+ #define SEC(name) \
+ 	_Pragma("GCC diagnostic push")					    \
+ 	_Pragma("GCC diagnostic ignored \"-Wignored-attributes\"")	    \
+ 	__attribute__((section(name), used))				    \
+ 	_Pragma("GCC diagnostic pop")					    \
+ 
++#endif
++
+ /* Avoid 'linux/stddef.h' definition of '__always_inline'. */
+ #undef __always_inline
+ #define __always_inline inline __attribute__((always_inline))
+-- 
+2.33.0
+

libbpf.spec

@@ -4,7 +4,7 @@
 
 Name:           %{githubname}
 Version:        %{githubver}
-Release:        6
+Release:        7
 Summary:        Libbpf library
 
 License:        LGPLv2 or BSD
@@ -12,7 +12,7 @@ URL:            https://github.com/%{githubname}/%{githubname}
 Source:         https://github.com/%{githubname}/%{githubname}/archive/refs/tags/v%{githubver}.tar.gz
 BuildRequires:  gcc elfutils-libelf-devel elfutils-devel
 
-Patch0000:	backport-libbpf-Fix-determine_ptr_size-guessing.patch
+Patch0000:      backport-libbpf-Fix-determine_ptr_size-guessing.patch
 Patch0001:      backport-libbpf-preserve-errno-across-pr_warn-pr_info-pr_debug.patch
 Patch0002:      backport-libbpf-Ensure-functions-with-always_inline-attribute-are-inline.patch
 Patch0003:      backport-libbpf-Fix-the-name-of-a-reused-map.patch
@@ -26,6 +26,7 @@ Patch0010:      backport-sync-start-syncing-include-uapi-linux-fcntl.h-UAPI-h.pa
 Patch0011:      backport-libbpf-Handle-size-overflow-for-ringbuf-mmap.patch
 Patch0012:      backport-libbpf-Use-page-size-as-max_entries-when-probing-rin.patch
 Patch0013:      backport-libbpf-Fix-alen-calculation-in-libbpf_nla_dump_error.patch
+Patch0014:      backport-libbpf-Disable-SEC-pragma-macro-on-GCC.patch
 
 # This package supersedes libbpf from kernel-tools,
 # which has default Epoch: 0. By having Epoch: 1
@@ -78,6 +79,10 @@ developing applications that use %{name}
 %{_libdir}/libbpf.a
 
 %changelog
+* Fri May 12 2023 zhangmingyi <zhangmingyi5@huawei.com> -2:0.8.1-7
+- backport patches from upstream:
+  backport-libbpf-Disable-SEC-pragma-macro-on-GCC.patch
+
 * Fri Apr 28 2023 SuperCharge <xiesongyang@huawei.com> -2:0.8.1-6
 - backport patches from upstream:
   backport-libbpf-Fix-alen-calculation-in-libbpf_nla_dump_error.patch