568dd29c2f
Fixes: http://autobuild.buildroot.net/results/1e9/1e965d83d75615f35308440c5db044314a349357/ Signed-off-by: Bernd Kuhls <bernd@kuhls.net> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
85 lines
2.6 KiB
Diff
85 lines
2.6 KiB
Diff
From 317aafb133ed797c4cd62599565a77ecc595daea Mon Sep 17 00:00:00 2001
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From: Bernd Kuhls <bernd@kuhls.net>
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Date: Thu, 29 Jun 2023 07:57:21 +0200
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Subject: [PATCH] Fix symver build error on non-ELF platforms
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The following error is observed on Microblaze [1] build:
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error: symver is only supported on ELF platforms
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due to using __attribute__((symver)) on non-ELF platform.
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[1] http://autobuild.buildroot.net/results/1e9/1e965d83d75615f35308440c5db044314a349357/build-end.log
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ac_check_attribute_symver.m4 was downloaded from
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https://github.com/smuellerDD/libkcapi/blob/master/m4/ac_check_attribute_symver.m4
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Upstream: https://github.com/alsa-project/alsa-lib/pull/334
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Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
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---
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configure.ac | 1 +
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include/alsa-symbols.h | 2 +-
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m4/ac_check_attribute_symver.m4 | 24 ++++++++++++++++++++++++
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3 files changed, 26 insertions(+), 1 deletion(-)
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create mode 100644 m4/ac_check_attribute_symver.m4
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diff --git a/configure.ac b/configure.ac
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index 0588eec3..71ec0b15 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -46,6 +46,7 @@ dnl Checks for typedefs, structures, and compiler characteristics.
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AC_C_CONST
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AC_C_INLINE
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AC_HEADER_TIME
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+AC_CHECK_ATTRIBUTE_SYMVER
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dnl Checks for library functions.
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AC_PROG_GCC_TRADITIONAL
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diff --git a/include/alsa-symbols.h b/include/alsa-symbols.h
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index f8c49103..521e5956 100644
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--- a/include/alsa-symbols.h
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+++ b/include/alsa-symbols.h
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@@ -29,7 +29,7 @@
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#define INTERNAL_CONCAT2_2(Pre, Post) Pre##Post
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#define INTERNAL(Name) INTERNAL_CONCAT2_2(__, Name)
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-#if __GNUC__ > 10
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+#if HAVE_ATTRIBUTE_SYMVER && __GNUC__ > 10
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#define symbol_version(real, name, version) \
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extern __typeof (real) real __attribute__((symver (#name "@" #version)))
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#define default_symbol_version(real, name, version) \
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diff --git a/m4/ac_check_attribute_symver.m4 b/m4/ac_check_attribute_symver.m4
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new file mode 100644
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index 00000000..b484c5eb
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--- /dev/null
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+++ b/m4/ac_check_attribute_symver.m4
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@@ -0,0 +1,24 @@
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+dnl Check compiler support for symver function attribute
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+AC_DEFUN([AC_CHECK_ATTRIBUTE_SYMVER], [
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+ saved_CFLAGS=$CFLAGS
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+ CFLAGS="-O0 -Werror"
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+ AC_COMPILE_IFELSE(
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+ [AC_LANG_PROGRAM(
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+ [[
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+ void _test_attribute_symver(void);
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+ __attribute__((__symver__("sym@VER_1.2.3"))) void _test_attribute_symver(void) {}
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+ ]],
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+ [[
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+ _test_attribute_symver()
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+ ]]
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+ )],
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+ [
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+ AC_DEFINE([HAVE_ATTRIBUTE_SYMVER], 1, [Define to 1 if __attribute__((symver)) is supported])
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+ ],
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+ [
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+ AC_DEFINE([HAVE_ATTRIBUTE_SYMVER], 0, [Define to 0 if __attribute__((symver)) is not supported])
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+ ]
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+ )
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+ CFLAGS=$saved_CFLAGS
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+])
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+
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--
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2.39.2
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