From: Daniel Gomez <da.gomez@xxxxxxxxxxx>
macOS hosts do not include byteswap.h header required for modpost
objects. Add a copy of the string/byteswap.h from the GNU C Library
(glibc), version glibc-2.40 into include/byteswap and update the modpost
Makefile to include the library.
Remove the following headers from glibc:
diff --git a/include/byteswap/byteswap.h b/include/byteswap/byteswap.h
index 66efb8fc4327..d27dd5e4bc6a 100644
--- a/include/byteswap/byteswap.h
+++ b/include/byteswap/byteswap.h
@@ -19,11 +19,6 @@
#ifndef _BYTESWAP_H
#define _BYTESWAP_H 1
-#include <features.h>
-
-/* Get the machine specific, optimized definitions. */
-#include <bits/byteswap.h>
-
/* The following definitions must all be macros, otherwise some
of the possible optimizations are not possible. */
Fixes build error for macOS:
$SUBARCH is [arm64]
HOSTCC scripts/mod/modpost.o
HOSTCC scripts/mod/sumversion.o
HOSTCC scripts/mod/symsearch.o
HOSTCC scripts/mod/file2alias.o
In file included from scripts/mod/symsearch.c:8:
scripts/mod/modpost.h:2:10: fatal error: 'byteswap.h' file not found
^~~~~~~~~~~~
In file included from scripts/mod/sumversion.c:11:
scripts/mod/modpost.h:2:10: fatal error: 'byteswap.h' file not found
^~~~~~~~~~~~
In file included from scripts/mod/modpost.c:23:
scripts/mod/modpost.h:2:10: fatal error: 'byteswap.h' file not found
^~~~~~~~~~~~
1 error generated.
make[1]: *** [scripts/Makefile.host:133: scripts/mod/symsearch.o] Error 1
make[1]: *** Waiting for unfinished jobs....
1 error generated.
In file included from scripts/mod/file2alias.c:15:
scripts/mod/modpost.h:2:10: fatal error: 'byteswap.h' file not found
^~~~~~~~~~~~
make[1]: *** [scripts/Makefile.host:133: scripts/mod/sumversion.o] Error 1
1 error generated.
make[1]: *** [scripts/Makefile.host:133: scripts/mod/modpost.o] Error 1
1 error generated.
make[1]: *** [scripts/Makefile.host:133: scripts/mod/file2alias.o] Error 1
make: *** [Makefile:1191: prepare0] Error 2
error: Recipe `kernel-build` failed with exit code 2
Fixes: bd78c9d71420 ("modpost: define TO_NATIVE() using bswap_*
functions") build error for macOS.
Signed-off-by: Daniel Gomez <da.gomez@xxxxxxxxxxx>
---
include/byteswap/byteswap.h | 35 +++++++++++++++++++++++++++++++++++
scripts/mod/Makefile | 8 ++++----
2 files changed, 39 insertions(+), 4 deletions(-)
diff --git a/include/byteswap/byteswap.h b/include/byteswap/byteswap.h
new file mode 100644
index 000000000000..d27dd5e4bc6a
--- /dev/null
+++ b/include/byteswap/byteswap.h
@@ -0,0 +1,35 @@
+/* Swap byte order for 16, 32 and 64 bit values
+ Copyright (C) 1997-2024 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _BYTESWAP_H
+#define _BYTESWAP_H 1
+
+
+/* The following definitions must all be macros, otherwise some
+ of the possible optimizations are not possible. */
+
+/* Return a value with both bytes in the 16 bit argument swapped. */
+#define bswap_16(x) __bswap_16 (x)
+
+/* Return a value with all bytes in the 32 bit argument swapped. */
+#define bswap_32(x) __bswap_32 (x)
+
+/* Return a value with all bytes in the 64 bit argument swapped. */
+#define bswap_64(x) __bswap_64 (x)
+
+#endif /* byteswap.h */
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index 98b4cd8cc7e6..f398dcddef58 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -8,10 +8,10 @@ modpost-objs := modpost.o file2alias.o sumversion.o symsearch.o
devicetable-offsets-file := devicetable-offsets.h
-HOSTCFLAGS_modpost.o = -I$(srctree)/include/elf
-HOSTCFLAGS_file2alias.o = -I$(srctree)/include/elf
-HOSTCFLAGS_sumversion.o = -I$(srctree)/include/elf
-HOSTCFLAGS_symsearch.o = -I$(srctree)/include/elf
+HOSTCFLAGS_modpost.o = -I$(srctree)/include/elf -I$(srctree)/include/byteswap
+HOSTCFLAGS_file2alias.o = -I$(srctree)/include/elf -I$(srctree)/include/byteswap
+HOSTCFLAGS_sumversion.o = -I$(srctree)/include/elf -I$(srctree)/include/byteswap
+HOSTCFLAGS_symsearch.o = -I$(srctree)/include/elf -I$(srctree)/include/byteswap
HOSTCFLAGS_mk_elfconfig.o = -I$(srctree)/include/elf
$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s FORCE
--
Git-146)
